Now showing 1 - 10 of 35
  • 2002Conference Paper
    [["dc.bibliographiccitation.firstpage","648"],["dc.bibliographiccitation.journal","Proceedings of the International Astronomical Union"],["dc.bibliographiccitation.lastpage","652"],["dc.bibliographiccitation.volume","207"],["dc.contributor.author","Weilbacher, Peter M."],["dc.contributor.author","Fritze-von Alvensleben, Uta"],["dc.contributor.author","Duc, P. A."],["dc.date.accessioned","2018-11-07T10:33:05Z"],["dc.date.available","2018-11-07T10:33:05Z"],["dc.date.issued","2002"],["dc.description.abstract","We summarize the properties of tidal dwarf candidates in a sample of interacting galaxies and classify objects in tidal tails depending on their morphological appearance. New high-resolution dynamical models are needed to understand how the different structures seen in tidal tails are formed."],["dc.identifier.isi","000179397100118"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/44518"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Astronomical Society of the Pacific"],["dc.publisher.place","San Francisco"],["dc.relation.conference","207th Symposium on Extragalactic Star Clusters"],["dc.relation.eventend","2001-03-16"],["dc.relation.eventlocation","Pucón, Chile"],["dc.relation.eventstart","2001-03-12"],["dc.relation.isbn","1-58381-115-X"],["dc.relation.ispartof","Extragalactic star clusters"],["dc.title","Dwarf galaxies and star clusters in tidal tails"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]
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  • 2004Conference Paper
    [["dc.bibliographiccitation.firstpage","210"],["dc.bibliographiccitation.lastpage","211"],["dc.contributor.author","Anders, P."],["dc.contributor.author","van Alvensleben, U. F."],["dc.contributor.author","de Grijs, Richard"],["dc.date.accessioned","2018-11-07T10:53:12Z"],["dc.date.available","2018-11-07T10:53:12Z"],["dc.date.issued","2004"],["dc.description.abstract","Young clusters are observed to form in a variety of interacting galaxies and violent starbursts, a substantial number resembling the progenitors of the well-studied globular clusters in mass and size. By studying young clusters in merger remnants and peculiar galaxies, we can therefore learn about the violent star formation history of these galaxies. We present a new set of evolutionary synthesis models of our GALEV code specifically developed to include the gaseous emission of presently forming star clusters, and a new tool that allows to determine individual cluster metallicities, ages, extinction values and masses from a comparison of a large grid of model Spectral Energy Distributions (SEDs) with multi-color observations. First results for the newly-born clusters in NGC 1569 are presented."],["dc.identifier.isi","222682600050"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/49302"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Astronomical Soc Pacific"],["dc.publisher.place","San Francisco"],["dc.relation.conference","217th Symposium of the International-Astronomical-Union on Recycling Intergalactic and Interstellar Matter held at the 25th IAU General Assembly"],["dc.relation.eventend","2003-07-17"],["dc.relation.eventlocation","Sydney, Australia"],["dc.relation.eventstart","2003-07-14"],["dc.relation.isbn","1-58381-166-4"],["dc.relation.ispartof","Recycling intergalactic and interstellar matter; proceedings of the 217th Symposium of the International Astronomical Union held in Sydney, Australia 14 - 17 July 2003"],["dc.title","Young star clusters: Clues to galaxy formation and evolution"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]
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  • 2001Conference Paper
    [["dc.bibliographiccitation.issue","204"],["dc.bibliographiccitation.seriesnr","204"],["dc.contributor.author","Moller, C. S."],["dc.contributor.author","Fritze-Von Alvensleben, U."],["dc.contributor.author","Calzetti, D."],["dc.contributor.author","Fricke, K. J."],["dc.date.accessioned","2018-11-07T09:32:17Z"],["dc.date.available","2018-11-07T09:32:17Z"],["dc.date.issued","2001"],["dc.identifier.isi","000175997600051"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31720"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Astronomical Soc Pacific"],["dc.publisher.place","San Francisco"],["dc.relation.conference","24th General Assembly of the International-Astronomical-Union"],["dc.relation.crisseries","Proceedings of the ... Symposium of the International Astronomical Union"],["dc.relation.eventend","2000-08-18"],["dc.relation.eventlocation","Manchester, United Kingdom"],["dc.relation.eventstart","2000-08-15"],["dc.relation.isbn","1-58381-062-5"],["dc.relation.ispartof","The extragalactic infrared background and its cosmological implications"],["dc.relation.ispartofseries","Symposium International Astronomical Union; 204"],["dc.title","Metallicities and dust in high-z galaxies"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]
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  • 2009Journal Article
    [["dc.bibliographiccitation.firstpage","1954"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Monthly Notices of the Royal Astronomical Society"],["dc.bibliographiccitation.lastpage","1965"],["dc.bibliographiccitation.volume","397"],["dc.contributor.author","Falkenberg, M. A."],["dc.contributor.author","Kotulla, R."],["dc.contributor.author","Fritze, Uta"],["dc.date.accessioned","2018-11-07T11:25:37Z"],["dc.date.available","2018-11-07T11:25:37Z"],["dc.date.issued","2009"],["dc.description.abstract","In a previous paper, we have shown that the classical definition of E+A galaxies excludes a significant number of post-starburst galaxies. We suggested that analysing broad-band spectral energy distributions (SEDs) is a more comprehensive method to select and distinguish post-starburst galaxies than the classical definition of measuring equivalent widths of (H delta) and [O ii] lines. In this paper, we will carefully investigate this new method and evaluate it by comparing our model grid of post-starburst galaxies to observed E+A galaxies from the MORPHS catalogue. In the first part, we investigate the UV-optical-NIR (near-infrared) SEDs of a large variety in terms of progenitor galaxies, burst strengths and time-scales of post-starburst models and compare them to undisturbed spiral, S0 and E galaxies as well as to galaxies in their starburst phase. In the second part, we compare our post-starburst models with the observed E+A galaxies in terms of Lick indices, luminosities and colours. We then use the new method of comparing the model SEDs with SEDs of the observed E+A galaxies. We find that the post-starburst models can be distinguished from undisturbed spiral, S0 and E galaxies and galaxies in their starburst phase on the basis of their SEDs. It is even possible to distinguish most of the different post-starbursts by their SEDs. From the comparison with observations, we find that all observed E+A galaxies from the MORPHS catalogue can be matched by our models. However, only models with short decline time-scales for the star formation rate are possible scenarios for the observed E+A galaxies in agreement with our results from the first paper."],["dc.identifier.doi","10.1111/j.1365-2966.2009.15036.x"],["dc.identifier.isi","000268958400021"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/56665"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell Publishing, Inc"],["dc.relation.issn","0035-8711"],["dc.title","The role of E plus A and post-starburst galaxies - II. Spectral energy distributions and comparison with observations"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]
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  • 2001Journal Article
    [["dc.bibliographiccitation.journal","Astrophysics and Space Science"],["dc.bibliographiccitation.volume","277"],["dc.contributor.author","Weilbacher, Peter M."],["dc.contributor.author","Duc, P. A."],["dc.contributor.author","Fritze-von Alvensleben, Uta"],["dc.date.accessioned","2018-11-07T09:29:38Z"],["dc.date.available","2018-11-07T09:29:38Z"],["dc.date.issued","2001"],["dc.format.extent","497"],["dc.identifier.doi","10.1023/A:1012762830407"],["dc.identifier.isi","000172167900131"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31088"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Kluwer Academic Publ"],["dc.relation.issn","0004-640X"],["dc.title","Galaxy recycling: The first sample of TDG candidates"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]
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  • 2005Journal Article
    [["dc.bibliographiccitation.firstpage","L19"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.lastpage","L23"],["dc.bibliographiccitation.volume","443"],["dc.contributor.author","Bicker, J."],["dc.contributor.author","Fritze-von Alvensleben, Uta"],["dc.date.accessioned","2018-11-07T10:53:42Z"],["dc.date.available","2018-11-07T10:53:42Z"],["dc.date.issued","2005"],["dc.description.abstract","We present new calibrations of the widely used H-alpha, [OII], and UV luminosity vs. star formation rate (SFR) relations. Using our evolutionary, synthesis code GALEV we compute the different calibrations for 5 metallicities, from 1/50 solar up to 2.5 solar. We find significant changes in the calibrations for lower metallicities compared to the standard calibrations using solar input physics."],["dc.identifier.doi","10.1051/0004-6361:200500194"],["dc.identifier.isi","000233320000002"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/49404"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Edp Sciences S A"],["dc.relation.issn","0004-6361"],["dc.title","Metallicity dependent calibrations of flux based SFR tracers"],["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","893"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Astrophysics and Space Science"],["dc.bibliographiccitation.lastpage","896"],["dc.bibliographiccitation.volume","284"],["dc.contributor.author","Fritze-von Alvensleben, Uta"],["dc.contributor.author","Weilbacher, P."],["dc.contributor.author","Bicker, J."],["dc.date.accessioned","2018-11-07T10:42:03Z"],["dc.date.available","2018-11-07T10:42:03Z"],["dc.date.issued","2003"],["dc.description.abstract","To account for the range of stellar metallicities in local galaxies and for the increasing importance of low metallicities at higher redshift we present chemically consistent models for the spectral and chemical evolution of galaxies over cosmological timescales. We discuss advantages, limitations and future prospects of our approach."],["dc.identifier.doi","10.1023/A:1024014800146"],["dc.identifier.isi","000183320500119"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/46692"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["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","1572-946X"],["dc.relation.issn","0004-640X"],["dc.title","Chemically consistent evolutionary synthesis"],["dc.type","conference_paper"],["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","1"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.lastpage","11"],["dc.bibliographiccitation.volume","392"],["dc.contributor.author","Schulz, J."],["dc.contributor.author","Fritze-von Alvensleben, Uta"],["dc.contributor.author","Moller, C. S."],["dc.contributor.author","Fricke, K. J."],["dc.date.accessioned","2018-11-07T10:03:52Z"],["dc.date.available","2018-11-07T10:03:52Z"],["dc.date.issued","2002"],["dc.description.abstract","A new set of evolutionary synthesis spectra are presented for Simple Stellar Populations (SSPs) covering ranges in metallicity from 0.02 less than or equal to Z/Z(.) less than or equal to 2.5 and ages from 4 x 10(6) yr less than or equal to t less than or equal to 16 Gyr. They are based on the most recent isochrones from the Padova group that extend earlier models by the inclusion of the thermal pulsing AGB phase for stars in the mass range 2 M-. less than or equal to m less than or equal to 7 M-. in accordance with the fuel consumption theorem. We show that with respect to earlier models, inclusion of the TP-AGB phase leads to significant changes in the (V-I) and(V-K) colors of SSPs in the age range from 10(8) to greater than or similar to 10(9) yr. Using model atmosphere spectra from Lejeune et al. (1997, 1998), we calculate the spectral evolution of single burst populations of various metallicities covering the wavelength range from 90 Angstrom through 160 mum. Isochrone spectra are convolved with filter response functions to describe the time evolution of luminosities and colors in Johnson, Thuan & Gunn, Koo, HST, Washington and Stromgren filters. The models and their results are not only intended for use in the interpretation of star clusters but also for combination with any kind of dynamical galaxy formation and/or evolution model that contains a star formation criterion. Moreover, the evolution of these single burst single metallicity stellar populations is readily folded with any kind of star formation - and eventually chemical enrichment - history to describe the evolutionary spectral synthesis of composite stellar populations like galaxies of any type with continuous or discontinuous star formation. For these latter purposes we also present the time evolution of ejection rates for gas and metals for two different Initial Mass Functions (IMFs) as well as cosmological and evolutionary corrections for all the filters as a function of redshift for 0 less than or equal to z less than or equal to 5 and two different cosmologies. Extensive data files are provided in the electronic version, at CDS, and at our above www-address."],["dc.identifier.doi","10.1051/0004-6361:20020657"],["dc.identifier.isi","000177868700006"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/9730"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/38572"],["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","Spectral and photometric evolution of simple stellar populations at various metallicities"],["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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  • 2004Journal Article
    [["dc.bibliographiccitation.firstpage","17"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Monthly Notices of the Royal Astronomical Society"],["dc.bibliographiccitation.lastpage","28"],["dc.bibliographiccitation.volume","347"],["dc.contributor.author","Anders, Peter"],["dc.contributor.author","de Grijs, Richard"],["dc.contributor.author","Fritze-von Alvensleben, Uta"],["dc.contributor.author","Bissantz, Nicolai"],["dc.date.accessioned","2018-11-07T10:52:55Z"],["dc.date.available","2018-11-07T10:52:55Z"],["dc.date.issued","2004"],["dc.description.abstract","We analyse multiwavelength Hubble Space Telescope (HST) observations of a large number of star clusters in the nearby (post-)starburst dwarf galaxy NGC 1569. Their spectral energy distributions (SEDs) cover at least the wavelength range from U to I in equivalent HST filters, in most cases supplemented by near-infrared data. Using our most up-to-date evolutionary synthesis models of the Gottingen GALEV code we determine ages, metallicities, extinction values and masses for each individual cluster robustly and independently. We confirm the youth of most of these objects. The majority were formed in a very intense starburst starting around 25 Myr ago. While there are two prominent 'super star clusters' present in this galaxy, with masses of (5-16) x 10(5) M., almost all remaining clusters are significantly less massive than an average Milky Way globular cluster, and are generally consistent with open cluster-type objects. We determine the cluster mass function from individual cluster masses derived by scaling the model SEDs of known mass to the observed cluster SEDs for each individual cluster. We find signs of a change in the cluster mass function as the burst proceeds, which we attribute to the special conditions of star cluster formation in this starburst dwarf galaxy environment."],["dc.identifier.doi","10.1111/j.1365-2966.2004.07171.x"],["dc.identifier.isi","000187257000004"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/49228"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Oxford Univ Press"],["dc.relation.issn","1365-2966"],["dc.relation.issn","0035-8711"],["dc.title","Star cluster formation and evolution in the dwarf starburst galaxy NGC 1569"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]
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  • 2005Conference Paper
    [["dc.bibliographiccitation.firstpage","867"],["dc.bibliographiccitation.journal","Highlights of Astronomy"],["dc.bibliographiccitation.lastpage","870"],["dc.bibliographiccitation.volume","13"],["dc.contributor.author","Anders, Peter"],["dc.contributor.author","Fritze-von Alvensleben, Uta"],["dc.contributor.author","de Grijs, Richard"],["dc.date.accessioned","2018-11-07T08:39:54Z"],["dc.date.available","2018-11-07T08:39:54Z"],["dc.date.issued","2005"],["dc.description.abstract","Star cluster formation is a major mode of star formation in the extreme conditions of interacting galaxies and violent star bursts. These newly-formed clusters are built from recycled gas, pre-enriched to various levels within the interacting galaxies. Hence, star clusters of different ages represent a fossil record of the chemical enrichment history of their host galaxy, as well as of the host galaxy's violent star formation history. We present a new set of evolutionary synthesis models of our GALEV code, specifically developed to include the gaseous emission of presently forming star clusters, and a new tool to analyze multi-color observations with our models. First results for newly-born clusters in the dwarf star-burst galaxy NGC 1569 are presented."],["dc.identifier.isi","240768700242"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/19113"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Astronomical Soc Pacific"],["dc.publisher.place","San francisco"],["dc.relation.conference","25th General Assembly of the International-Astronomical-Union"],["dc.relation.eventlocation","Sydney, AUSTRALIA"],["dc.relation.isbn","1-58381-189-3"],["dc.relation.issn","0074-1809"],["dc.title","Young star clusters: Metallicity tracers in external 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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