Now showing 1 - 10 of 15
  • 2005Journal Article
    [["dc.bibliographiccitation.firstpage","115"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.lastpage","127"],["dc.bibliographiccitation.volume","429"],["dc.contributor.author","Noeske, K. G."],["dc.contributor.author","Papaderos, P."],["dc.contributor.author","Cairos, L. M."],["dc.contributor.author","Fricke, K. J."],["dc.date.accessioned","2018-11-07T08:34:49Z"],["dc.date.available","2018-11-07T08:34:49Z"],["dc.date.issued","2005"],["dc.description.abstract","This paper is part of a series of publications which present a systematic study of Blue Compact Dwarf (BCD) Galaxies in the near infrared (NIR). Compared to the visible light, NIR data allow a better separation of the starburst emission from the light distribution of the old stellar low-surface brightness (LSB) host galaxy. We analyze deep NIR broad band images of a sample of 11 BCDs, observed with the Calar Alto 3.6 m telescope. This work enlarges the samples presented in preceding papers of this study (Noeske et al. 2003, A A, 410, 481; Cairos et al. 2003, ApJ, 593, 312) by BCDs of the most common morphological type, displaying a regular elliptical LSB host galaxy. The data presented here allow the detection and quantitative study of the extended stellar LSB host galaxy in all sample BCDs. The NIR surface brightness profiles (SBPs) of the LSB host galaxies agree at large galactocentric radii with those from optical studies, showing also an exponential intensity decrease and compatible scale lengths. Similar to Noeske et al. ( 2003), we find centrally flattening exponential (type V) SBPs of the host galaxy for several BCDs. Such SBPs remain mostly undetected in optical bands, due to the comparatively stronger starburst emission at these wavelengths. We apply a modified exponential distribution to decompose and quantitatively analyze SBPs of LSB hosts with a type V intensity distribution. We present the results of the surface photometry and the decomposition of SBPs, and discuss individual objects with respect to morphological details of their star-forming regions."],["dc.identifier.doi","10.1051/0004-6361:20040221"],["dc.identifier.fs","38257"],["dc.identifier.isi","000225732700016"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/9859"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/17913"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","E D P Sciences"],["dc.relation.issn","0004-6361"],["dc.relation.orgunit","Fakultät für Physik"],["dc.title","New insights to the photometric structure of Blue Compact Dwarf Galaxies from deep near-infrared studies - II. The sample of northern BCDs"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]
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  • 2017Journal Article
    [["dc.bibliographiccitation.firstpage","A119"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","608"],["dc.contributor.author","Cairós, L. M."],["dc.contributor.author","González-Pérez, J. N."],["dc.date.accessioned","2020-12-10T18:11:36Z"],["dc.date.available","2020-12-10T18:11:36Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1051/0004-6361/201731293"],["dc.identifier.eissn","1432-0746"],["dc.identifier.issn","0004-6361"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74079"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Probing star formation and feedback in dwarf galaxies"],["dc.title.alternative","Integral field view of the blue compact galaxy Tololo 1937-423⋆"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]
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  • 2002Journal Article
    [["dc.bibliographiccitation.firstpage","164"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","The Astrophysical Journal"],["dc.bibliographiccitation.lastpage","182"],["dc.bibliographiccitation.volume","577"],["dc.contributor.author","Cairos, L. M."],["dc.contributor.author","Caon, N."],["dc.contributor.author","Garcia-Lorenzo, B."],["dc.contributor.author","Vilchez, J. M."],["dc.contributor.author","Munoz-Tunon, C."],["dc.date.accessioned","2018-11-07T10:02:48Z"],["dc.date.available","2018-11-07T10:02:48Z"],["dc.date.issued","2002"],["dc.description.abstract","We present results from a detailed spectrophotometric analysis of the blue compact dwarf galaxy (BCD) Mrk 370, based on deep UBVRI broadband and Halpha narrowband observations, and on long-slit and two-dimensional spectroscopy of its brightest knots. The spectroscopic data are used to derive the internal extinction and to compute metallicities, electronic density, and temperature in the knots. By subtracting the contribution of the underlying older stellar population, modeled by an exponential function, removing the contribution from emission lines, and correcting for extinction, we can measure the true colors of the young star-forming knots. We show that the colors obtained this way differ significantly from those derived without the above corrections and lead to different estimates of the ages and star-forming history of the knots. Using predictions of evolutionary synthesis models, we estimate the ages of both the starburst regions and the underlying stellar component. We found that we can reproduce the colors of all the knots with an instantaneous burst of star formation and the Salpeter initial mass function ( IMF) with an upper mass limit of 100 M-circle dot. The resulting ages range between 3 and 6 Myr. The colors of the low surface brightness component are consistent with ages larger than 5 Gyr. The kinematic results suggest ordered motion around the major axis of the galaxy."],["dc.identifier.doi","10.1086/342134"],["dc.identifier.isi","000178033200017"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/38305"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Univ Chicago Press"],["dc.relation.issn","0004-637X"],["dc.title","Spectrophotometric observations of blue compact dwarf galaxies: Markarian 370"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]
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  • 2003Conference Paper
    [["dc.bibliographiccitation.firstpage","611"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Astrophysics and Space Science"],["dc.bibliographiccitation.lastpage","614"],["dc.bibliographiccitation.volume","284"],["dc.contributor.author","Cairos, L. M."],["dc.contributor.author","Garcia-Lorenzo, B."],["dc.contributor.author","Caon, N."],["dc.contributor.author","Vilchez, J. M."],["dc.contributor.author","Papaderos, P."],["dc.contributor.author","Noeske, K."],["dc.date.accessioned","2018-11-07T10:42:02Z"],["dc.date.available","2018-11-07T10:42:02Z"],["dc.date.issued","2003"],["dc.description.abstract","Preliminary results from a detailed spectrophotometric analysis of the blue compact dwarf galaxy (BCD) Mrk 35 are presented. We have performed deep UBVRI broad-band and H-alpha narrow-band optical observations, near-infrared (JHK(s)) imaging and long-slit spectroscopy of the galaxy. Mrk 35 is composed of a very young starburst population distributed in a bar-like structure, placed on top of an underlying, older stellar host galaxy. Using predictions of evolutionary synthesis models, we estimate the ages of both the starburst regions and the underlying stellar component."],["dc.identifier.doi","10.1023/A:1024018308729"],["dc.identifier.isi","000183320500062"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/46687"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Kluwer Academic Publ"],["dc.publisher.place","Dordrecht"],["dc.relation.conference","Conference on the Appropriate Modellings of Galaxy Evolution from their Cosmological Formation to their Presently Observable Structures"],["dc.relation.eventlocation","KIEL, GERMANY"],["dc.relation.issn","0004-640X"],["dc.title","Spectrophotometric investigations of the blue compact dwarf galaxy Mrk 35"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]
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  • 2020Journal Article
    [["dc.bibliographiccitation.firstpage","A95"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","634"],["dc.contributor.author","Cairós, L. M."],["dc.contributor.author","González-Pérez, J. N."],["dc.date.accessioned","2020-12-10T18:11:52Z"],["dc.date.available","2020-12-10T18:11:52Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1051/0004-6361/201936174"],["dc.identifier.eissn","1432-0746"],["dc.identifier.issn","0004-6361"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74166"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Understanding star formation and feedback in small galaxies"],["dc.title.alternative","The case of the blue compact dwarf Mrk 900"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]
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  • 2003Journal Article
    [["dc.bibliographiccitation.firstpage","312"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","The Astrophysical Journal"],["dc.bibliographiccitation.lastpage","332"],["dc.bibliographiccitation.volume","593"],["dc.contributor.author","Cairos, L. M."],["dc.contributor.author","Caon, N."],["dc.contributor.author","Papaderos, P."],["dc.contributor.author","Noeske, K."],["dc.contributor.author","Vilchez, J. M."],["dc.contributor.author","Lorenzo, B. G."],["dc.contributor.author","Munoz-Tunon, C."],["dc.date.accessioned","2018-11-07T10:37:01Z"],["dc.date.available","2018-11-07T10:37:01Z"],["dc.date.issued","2003"],["dc.description.abstract","We analyze J, H, and K-s near-infrared data for nine blue compact dwarf (BCD) galaxies, selected from a larger sample that we have already studied in the optical. We present contour maps, surface brightness and color profiles, and color maps of the sample galaxies. The morphology of the BCDs in the near-infrared (NIR) has been found to be basically the same as in the optical. The inner regions of these systems are dominated by the starburst component. At low surface brightness levels the emission is due to the underlying host galaxy; the latter is characterized by red, radially constant colors and isophotes well fitted by ellipses. We derive accurate optical-NIR host galaxy colors for eight of the sample galaxies; these colors are typical of an evolved stellar population. Interestingly, optical-NIR color maps reveal the presence of a complex, large-scale absorption pattern in three of the sample galaxies. We study the applicability of the Sersic law to describe the surface brightness profiles of the underlying host galaxy and find that, because of the limited surface brightness interval over which the fit can be made, the derived Sersic parameters are very sensitive to the selected radial interval and to errors in the sky subtraction. Fitting an exponential model gives generally more stable results and can provide a useful tool to quantify the structural properties of the host galaxy and compare them with those of other dwarf classes, as well as with those of star-forming dwarfs at higher redshifts."],["dc.identifier.doi","10.1086/376516"],["dc.identifier.isi","000184585600023"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/45462"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Univ Chicago Press"],["dc.relation.issn","0004-637X"],["dc.title","Deep near-infrared mapping of young and old stars in blue compact dwarf galaxies"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]
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  • 2002Journal Article
    [["dc.bibliographiccitation.firstpage","2438"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","The Astronomical Journal"],["dc.bibliographiccitation.lastpage","2448"],["dc.bibliographiccitation.volume","123"],["dc.contributor.author","Silich, S."],["dc.contributor.author","Tenorio-Tagle, G."],["dc.contributor.author","Munoz-Tunon, C."],["dc.contributor.author","Cairos, L. M."],["dc.date.accessioned","2018-11-07T10:30:02Z"],["dc.date.available","2018-11-07T10:30:02Z"],["dc.date.issued","2002"],["dc.description.abstract","Here we attempt to infer the recent history of star formation in the BCD galaxy VII Zw 403, based on an analysis that accounts for the dynamics of the remnant generated either by an instantaneous burst or by a continuous star formation event. The models are restricted by the size of the diffuse X-ray emitting region, the H luminosity from the star-forming region, and the superbubble diffuse X-ray luminosity. We have reobserved VII Zw 403 with a better sensitivity corresponding to the threshold Halpha flux 8.15 x 10(-17) ergs cm(-2) s(-1). The total Halpha luminosity derived from our data is much larger than reported before and presents a variety of ionized laments and incomplete shells superimposed on the diffuse Halpha emission. This result has a profound impact on the predicted properties of the starburst-blown superbubble. Numerical calculations based on the Hubble Space Telescope Halpha data predict two different scenarios of star formation able to match simultaneously all observed parameters. These are an instantaneous burst of star formation with a total mass of 5 x 10(5) M-. and a star-forming event with a constant star formation rate SFR = 4 x 10(-3) M-. yr(-1), which lasts for 35 Myr. The numerical calculations based on the energy input rate derived from our observations predict a short episode of star formation lasting less than 10 Myr with a total star cluster mass of similar to(1-3 x 10(6) M-.. However, the five main star-forming knots are sufficiently distant to form a coherent shell in a short timescale and still keep their energies blocked within local, spatially separated bubbles. The X-ray luminosities of these are here shown to be consistent with the ROSAT PSPC diffuse X-ray emission."],["dc.identifier.doi","10.1086/339969"],["dc.identifier.isi","000175311200019"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/43771"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Univ Chicago Press"],["dc.relation.issn","0004-6256"],["dc.title","On the recent history of star formation in the blue compact dwarf galaxy VII Zw 403"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]
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  • 2001Conference Paper
    [["dc.bibliographiccitation.firstpage","901"],["dc.bibliographiccitation.issue","2-4"],["dc.bibliographiccitation.journal","Astrophysics and Space Science"],["dc.bibliographiccitation.lastpage","908"],["dc.bibliographiccitation.volume","276"],["dc.contributor.author","Noeske, K. G."],["dc.contributor.author","Cairos, L. M."],["dc.contributor.author","Papaderos, P."],["dc.contributor.author","Vilchez, J. M."],["dc.contributor.author","Fricke, K. J."],["dc.date.accessioned","2018-11-07T09:29:49Z"],["dc.date.available","2018-11-07T09:29:49Z"],["dc.date.issued","2001"],["dc.description.abstract","We are currently analysing image data for a large sample of blue compact dwarf galaxies (BCDs), obtained in multiple optical broad- and narrow-band filters. We present preliminary results of a multi-band analysis of two typical BCDs, Mrk 5 and I Zw 123, for which surface-brightness profiles, colour profiles, colour maps and H-alpha equivalent-width maps have been derived. We demonstrate how a combination of these different processing methods allows a separate analysis of the young and old stellar populations with respect to their colours and spatial distributions. By comparing the derived colours with the predictions of evolutionary synthesis models, we estimate ages of the distinct stellar populations. The surface-brightness profiles of Mrk 5 show an exponential decay at large photometric radii, with slopes typically found for BCDs. In the case of the very compact object I Zw 123, the surface-brightness profile of the underlying stellar component can be described either by an exponential or an R-1/4 law. We discuss briefly how noise effects can influence the intrinsic slope of surface brightness profiles at low surface-brightness levels. For compact objects with extended starbursts, the study of the underlying stellar population can thereby be rendered difficult."],["dc.identifier.doi","10.1023/A:1017529324764"],["dc.identifier.isi","000170945400070"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31141"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Kluwer Academic Publ"],["dc.publisher.place","Dordrecht"],["dc.relation.conference","Euroconference on the Evolution of Galaxies on Cosmological Timescales"],["dc.relation.eventlocation","PUERTO CRUZ, SPAIN"],["dc.relation.issn","0004-640X"],["dc.title","Optical multi-band analyses of blue compact dwarf galaxies"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]
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  • 2015Journal Article
    [["dc.bibliographiccitation.artnumber","A21"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","577"],["dc.contributor.author","Cairos, L. M."],["dc.contributor.author","Caon, N."],["dc.contributor.author","Weilbacher, Peter M."],["dc.date.accessioned","2018-11-07T09:57:48Z"],["dc.date.available","2018-11-07T09:57:48Z"],["dc.date.issued","2015"],["dc.description.abstract","Context. Blue compact galaxies (BCG) are gas-rich, low-luminosity, low-metallicity systems that undergo a violent burst of star formation. These galaxies offer us a unique opportunity to investigate collective star formation and its effects on galaxy evolution in a relatively simple environment. Spatially resolved spectrophotometric studies of BCGs are essential for a better understanding of the role of starburst-driven feedback processes on the kinematical and chemical evolution of low-mass galaxies near and far. Aims. We carry out an integral field spectroscopic study of a sample of BCGs, with the aim of probing the morphology, kinematics, dust extinction, and excitation mechanisms of their warm interstellar medium. Methods. Eight BCGs were observed with the VIMOS integral field unit at the Very Large Telescope using blue and orange grisms in high-resolution mode. At a spatial sampling of 0\".67 per spaxel, we covered about 30\" x 30\" on the sky, with a wavelength range of 4150...7400 angstrom. Emission lines were fitted with a single Gaussian profile to measure their wavelength, flux, and width. From these data we built two-dimensional maps of the continuum and the most prominent emission-lines, as well as diagnostic line ratios, extinction, and kinematic maps. Results. An atlas has been produced with the following: emission-line fluxes and continuum emission; ionization, interstellar extinction, and electron density maps from line ratios; velocity and velocity dispersion fields. From integrated spectroscopy, it includes tables of the extinction corrected line fluxes and equivalent widths, diagnostic-line ratios, physical parameters, and the abundances for the brightest star-forming knots and for the whole galaxy."],["dc.identifier.doi","10.1051/0004-6361/201322518"],["dc.identifier.isi","000353579600021"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/12398"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/37241"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Edp Sciences S A"],["dc.relation.issn","1432-0746"],["dc.relation.issn","0004-6361"],["dc.relation.orgunit","Fakultät für Physik"],["dc.title","VIMOS integral field spectroscopy of blue compact galaxies I. Morphological properties, diagnostic emission-line ratios, and kinematics"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]
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  • 2017Journal Article
    [["dc.bibliographiccitation.firstpage","A125"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","600"],["dc.contributor.author","Cairós, L. M."],["dc.contributor.author","González-Pérez, J. N."],["dc.date.accessioned","2020-12-10T18:11:34Z"],["dc.date.available","2020-12-10T18:11:34Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1051/0004-6361/201629681"],["dc.identifier.eissn","1432-0746"],["dc.identifier.issn","0004-6361"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74061"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Integral field observations of the blue compact galaxy Haro14"],["dc.title.alternative","Star formation and feedback in dwarf galaxies"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]
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