Zechmeister, Mathias

[["dc.bibliographiccitation.firstpage","A68"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","625"],["dc.contributor.author","Schweitzer, A."],["dc.contributor.author","Passegger, V. M."],["dc.contributor.author","Cifuentes, C."],["dc.contributor.author","Béjar, V. J. S."],["dc.contributor.author","Cortés-Contreras, M."],["dc.contributor.author","Caballero, J. A."],["dc.contributor.author","del Burgo, C."],["dc.contributor.author","Czesla, S."],["dc.contributor.author","Kürster, M."],["dc.contributor.author","Montes, D."],["dc.contributor.author","Zapatero Osorio, M. R."],["dc.contributor.author","Ribas, I."],["dc.contributor.author","Reiners, A."],["dc.contributor.author","Quirrenbach, A."],["dc.contributor.author","Amado, P. J."],["dc.contributor.author","Aceituno, J."],["dc.contributor.author","Anglada-Escudé, G."],["dc.contributor.author","Bauer, F. F."],["dc.contributor.author","Dreizler, S."],["dc.contributor.author","Jeffers, S. V."],["dc.contributor.author","Guenther, E. W."],["dc.contributor.author","Henning, T."],["dc.contributor.author","Kaminski, A."],["dc.contributor.author","Lafarga, M."],["dc.contributor.author","Marfil, E."],["dc.contributor.author","Morales, J. C."],["dc.contributor.author","Schmitt, J. H. M. M."],["dc.contributor.author","Seifert, W."],["dc.contributor.author","Solano, E."],["dc.contributor.author","Tabernero, H. M."],["dc.contributor.author","Zechmeister, M."],["dc.date.accessioned","2020-12-10T18:11:47Z"],["dc.date.available","2020-12-10T18:11:47Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1051/0004-6361/201834965"],["dc.identifier.eissn","1432-0746"],["dc.identifier.issn","0004-6361"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74142"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","The CARMENES search for exoplanets around M dwarfs"],["dc.title.alternative","Different roads to radii and masses of the target stars"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","A20"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","648"],["dc.contributor.author","Toledo-Padrón, B."],["dc.contributor.author","Suárez Mascareño, A."],["dc.contributor.author","González Hernández, J. I."],["dc.contributor.author","Rebolo, R."],["dc.contributor.author","Pinamonti, M."],["dc.contributor.author","Perger, M."],["dc.contributor.author","Scandariato, G."],["dc.contributor.author","Damasso, M."],["dc.contributor.author","Sozzetti, A."],["dc.contributor.author","Zechmeister, M."],["dc.date.accessioned","2021-06-01T09:41:47Z"],["dc.date.available","2021-06-01T09:41:47Z"],["dc.date.issued","2021"],["dc.description.abstract","Context. M-dwarfs have proven to be ideal targets for planetary radial velocity (RV) searches due to their higher planet-star mass contrast, which favors the detection of low-mass planets. The abundance of super-Earth and Earth-like planets detected around this type of star motivates further such research on hosts without reported planetary companions. Aims. The HADES and CARMENES programs are aimed at carrying out extensive searches of exoplanetary systems around M-type stars in the northern hemisphere, allowing us to address, in a statistical sense, the properties of the planets orbiting these objects. In this work, we perform a spectroscopic and photometric study of one of the program stars (GJ 740), which exhibits a short-period RV signal that is compatible with a planetary companion. Methods. We carried out a spectroscopic analysis based on 129 HARPS-N spectra taken over a time span of 6 yr combined with 57 HARPS spectra taken over 4 yr, as well as 32 CARMENES spectra taken during more than 1 yr, resulting in a dataset with a time coverage of 10 yr. We also relied on 459 measurements from the public ASAS survey with a time-coverage of 8 yr, along with 5 yr of photometric magnitudes from the EXORAP project taken in the V , B , R , and I filters to carry out a photometric study. Both analyses were made using Markov chain Monte Carlo simulations and Gaussian process regression to model the activity of the star. Results. We present the discovery of a short-period super-Earth with an orbital period of 2.37756 −0.00011 +0.00013 d and a minimum mass of 2.96 −0.48 +0.50 M ⊕ . We offer an update to the previously reported characterization of the magnetic cycle and rotation period of the star, obtaining values of P rot = 35.563 ± 0.071 d and P cycle = 2800 ± 150 d. Furthermore, the RV time series exhibits a possibly periodic long-term signal, which might be related to a Saturn-mass planet of ~100 M ⊕ ."],["dc.identifier.doi","10.1051/0004-6361/202040099"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/85038"],["dc.notes.intern","DOI-Import GROB-425"],["dc.relation.eissn","1432-0746"],["dc.relation.issn","0004-6361"],["dc.title","A super-Earth on a close-in orbit around the M1V star GJ 740"],["dc.title.alternative","A HADES and CARMENES collaboration"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","A22"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","645"],["dc.contributor.author","Yan, F."],["dc.contributor.author","Wyttenbach, A."],["dc.contributor.author","Casasayas-Barris, N."],["dc.contributor.author","Reiners, A."],["dc.contributor.author","Pallé, E."],["dc.contributor.author","Henning, Th."],["dc.contributor.author","Mollière, P."],["dc.contributor.author","Czesla, S."],["dc.contributor.author","Nortmann, L."],["dc.contributor.author","Molaverdikhani, K."],["dc.contributor.author","Chen, G."],["dc.contributor.author","Snellen, I. A. G."],["dc.contributor.author","Zechmeister, M."],["dc.contributor.author","Huang, C."],["dc.contributor.author","Ribas, I."],["dc.contributor.author","Quirrenbach, A."],["dc.contributor.author","Caballero, J. A."],["dc.contributor.author","Amado, P. J."],["dc.contributor.author","Cont, D."],["dc.contributor.author","Khalafinejad, S."],["dc.contributor.author","Khaimova, J."],["dc.contributor.author","López-Puertas, M."],["dc.contributor.author","Montes, D."],["dc.contributor.author","Nagel, E."],["dc.contributor.author","Oshagh, M."],["dc.contributor.author","Pedraz, S."],["dc.contributor.author","Stangret, M."],["dc.date.accessioned","2021-04-14T08:30:14Z"],["dc.date.available","2021-04-14T08:30:14Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1051/0004-6361/202039302"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/83161"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation.eissn","1432-0746"],["dc.relation.issn","0004-6361"],["dc.title","Detection of the hydrogen Balmer lines in the ultra-hot Jupiter WASP-33b"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","A128"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","619"],["dc.contributor.author","Zechmeister, M."],["dc.date.accessioned","2020-12-10T18:11:40Z"],["dc.date.available","2020-12-10T18:11:40Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1051/0004-6361/201833162"],["dc.identifier.eissn","1432-0746"],["dc.identifier.issn","0004-6361"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74106"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","CORDIC-like method for solving Kepler’s equation"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","A50"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","640"],["dc.contributor.author","Bauer, F. F."],["dc.contributor.author","Zechmeister, M."],["dc.contributor.author","Kaminski, A."],["dc.contributor.author","Rodríguez López, C."],["dc.contributor.author","Caballero, J. A."],["dc.contributor.author","Azzaro, M."],["dc.contributor.author","Stahl, O."],["dc.contributor.author","Kossakowski, D."],["dc.contributor.author","Quirrenbach, A."],["dc.contributor.author","Becerril Jarque, S."],["dc.contributor.author","Rodríguez, E."],["dc.contributor.author","Amado, P. J."],["dc.contributor.author","Seifert, W."],["dc.contributor.author","Reiners, A."],["dc.contributor.author","Schäfer, S."],["dc.contributor.author","Ribas, I."],["dc.contributor.author","Béjar, V. J. S."],["dc.contributor.author","Cortés-Contreras, M."],["dc.contributor.author","Dreizler, S."],["dc.contributor.author","Hatzes, A."],["dc.contributor.author","Henning, T."],["dc.contributor.author","Jeffers, S. V."],["dc.contributor.author","Kürster, M."],["dc.contributor.author","Lafarga, M."],["dc.contributor.author","Montes, D."],["dc.contributor.author","Morales, J. C."],["dc.contributor.author","Schmitt, J. H. M. M."],["dc.contributor.author","Schweitzer, A."],["dc.contributor.author","Solano, E."],["dc.date.accessioned","2021-04-14T08:24:23Z"],["dc.date.available","2021-04-14T08:24:23Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1051/0004-6361/202038031"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/81267"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation.eissn","1432-0746"],["dc.relation.issn","0004-6361"],["dc.title","The CARMENES search for exoplanets around M dwarfs"],["dc.title.alternative","Measuring precise radial velocities in the near infrared: The example of the super-Earth CD Cet b"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","A76"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","614"],["dc.contributor.author","Jeffers, S. V."],["dc.contributor.author","Schöfer, P."],["dc.contributor.author","Lamert, A."],["dc.contributor.author","Reiners, A."],["dc.contributor.author","Montes, D."],["dc.contributor.author","Caballero, J. A."],["dc.contributor.author","Cortés-Contreras, M."],["dc.contributor.author","Marvin, C. J."],["dc.contributor.author","Passegger, V. M."],["dc.contributor.author","Zechmeister, M."],["dc.contributor.author","Quirrenbach, A."],["dc.contributor.author","Alonso-Floriano, F. J."],["dc.contributor.author","Amado, P. J."],["dc.contributor.author","Bauer, F. F."],["dc.contributor.author","Casal, E."],["dc.contributor.author","Diez Alonso, E."],["dc.contributor.author","Herrero, E."],["dc.contributor.author","Morales, J. C."],["dc.contributor.author","Mundt, R."],["dc.contributor.author","Ribas, I."],["dc.contributor.author","Sarmiento, L. F."],["dc.date.accessioned","2020-12-10T18:11:33Z"],["dc.date.available","2020-12-10T18:11:33Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1051/0004-6361/201629599"],["dc.identifier.eissn","1432-0746"],["dc.identifier.issn","0004-6361"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74060"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","CARMENES input catalogue of M dwarfs"],["dc.title.alternative","III. Rotation and activity from high-resolution spectroscopic observations"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","L5"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","609"],["dc.contributor.author","Reiners, A."],["dc.contributor.author","Ribas, I."],["dc.contributor.author","Zechmeister, M."],["dc.contributor.author","Caballero, J. A."],["dc.contributor.author","Trifonov, T."],["dc.contributor.author","Dreizler, S."],["dc.contributor.author","Morales, J. C."],["dc.contributor.author","Tal-Or, L."],["dc.contributor.author","Lafarga, M."],["dc.contributor.author","Quirrenbach, A."],["dc.contributor.author","Zapatero Osorio, M. R."],["dc.date.accessioned","2020-12-10T18:11:38Z"],["dc.date.available","2020-12-10T18:11:38Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1051/0004-6361/201732165"],["dc.identifier.eissn","1432-0746"],["dc.identifier.issn","0004-6361"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/15629"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74089"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.intern","Merged from goescholar"],["dc.relation.orgunit","Fakultät für Physik"],["dc.title","The CARMENES search for exoplanets around M dwarfs"],["dc.title.alternative","HD147379 b: A nearby Neptune in the temperate zone of an early-M dwarf"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","L8"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","602"],["dc.contributor.author","Trifonov, T."],["dc.contributor.author","Kürster, M."],["dc.contributor.author","Zechmeister, M."],["dc.contributor.author","Zakhozhay, O. V."],["dc.contributor.author","Reffert, S."],["dc.contributor.author","Lee, M. H."],["dc.contributor.author","Rodler, F."],["dc.contributor.author","Vogt, S. S."],["dc.contributor.author","Brems, S. S."],["dc.date.accessioned","2020-12-10T18:11:35Z"],["dc.date.available","2020-12-10T18:11:35Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1051/0004-6361/201731044"],["dc.identifier.eissn","1432-0746"],["dc.identifier.issn","0004-6361"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16809"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74070"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.intern","Merged from goescholar"],["dc.relation.orgunit","Fakultät für Physik"],["dc.title","Three planets around HD 27894"],["dc.title.alternative","A close-in pair with a 2:1 period ratio and an eccentric Jovian planet at 5.4 AU⋆"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","A103"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","561"],["dc.contributor.author","Ofir, Aviv"],["dc.contributor.author","Dreizler, Stefan"],["dc.contributor.author","Zechmeister, Mathias"],["dc.contributor.author","Husser, Tim-Oliver"],["dc.date.accessioned","2018-11-07T09:46:40Z"],["dc.date.available","2018-11-07T09:46:40Z"],["dc.date.issued","2014"],["dc.description.abstract","Context. The primary goal of the Kepler mission is the measurement of the frequency of Earth-like planets around Sun-like stars. However, the confirmation of the smallest of Kepler's candidates in long periods around FGK dwarfs is extremely difficult or even beyond the limit of current radial velocity technology. Transit timing variations (TTVs) may offer the possibility for these confirmations of near-resonant multiple systems by the mutual gravitational interaction of the planets. Aims. We previously detected the second planet candidate in the KOI 1574 system. The two candidates have relatively long periods (about 114 d and 191 d) and are in 5: 3 resonance. We therefore searched for TTVs in this particularly promising system. Methods. The full Kepler data was detrended with the proven SARS pipeline. The entire data allowed one to search for TTVs of the above signals, and to search for additional transit-like signals. Results. We detected strong anti-correlated TTVs of the 114 d and 191 d signals, dynamically confirming them as members of the same system. Dynamical simulations reproducing the observed TTVs allowed us to also determine the masses of the planets. We found KOI 1574.01 (hereafter Kepler-87 b) to have a radius of 13.49 +/- 0.55 R-circle plus and a mass of 324.2 +/- 8.8 M-circle plus, and KOI 1574.02 (Kepler-87 c) to have a radius of 6.14 +/- 0.29 R-circle plus and a mass of 6.4 +/- 0.8 M-circle plus. Both planets have low densities of 0.729 and 0.152 g cm(-3), respectively, which is non-trivial for such cold and old (7-8 Gyr) planets. Specifically, Kepler-87 c is the lowest-density planet in the super-Earth mass range. Both planets are thus particularly amenable to modeling and planetary structure studies, and also present an interesting case where ground-based photometric follow-up of Kepler planets is very desirable. Finally, we also detected two more short-period super-Earth sized (<2 R-circle plus) planetary candidates in the system, making the relatively high multiplicity of this system notable against the general paucity of multiple systems in the presence of giant planets like Kepler-87 b."],["dc.identifier.doi","10.1051/0004-6361/201220935"],["dc.identifier.fs","606094"],["dc.identifier.isi","000330584000103"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/10901"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/34933"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Edp Sciences S A"],["dc.relation","info:eu-repo/grantAgreement/EC/FP7/279347."],["dc.relation.issn","1432-0746"],["dc.relation.issn","0004-6361"],["dc.relation.orgunit","Fakultät für Physik"],["dc.title","An independent planet search in the Kepler dataset II. An extremely low-density super-Earth mass planet around Kepler-87"],["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"]]

[["dc.bibliographiccitation.firstpage","A41"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","623"],["dc.contributor.author","Palle, E."],["dc.contributor.author","Nowak, G."],["dc.contributor.author","Luque, R."],["dc.contributor.author","Hidalgo, D."],["dc.contributor.author","Barragán, O."],["dc.contributor.author","Prieto-Arranz, J."],["dc.contributor.author","Hirano, T."],["dc.contributor.author","Fridlund, M."],["dc.contributor.author","Gandolfi, D."],["dc.contributor.author","Livingston, J."],["dc.contributor.author","Dai, F."],["dc.contributor.author","Morales, J. C."],["dc.contributor.author","Lafarga, M."],["dc.contributor.author","Albrecht, S."],["dc.contributor.author","Alonso, R."],["dc.contributor.author","Amado, P. J."],["dc.contributor.author","Caballero, J. A."],["dc.contributor.author","Cabrera, J."],["dc.contributor.author","Cochran, W. D."],["dc.contributor.author","Csizmadia, Sz."],["dc.contributor.author","Deeg, H."],["dc.contributor.author","Eigmüller, Ph."],["dc.contributor.author","Endl, M."],["dc.contributor.author","Erikson, A."],["dc.contributor.author","Fukui, A."],["dc.contributor.author","Guenther, E. W."],["dc.contributor.author","Grziwa, S."],["dc.contributor.author","Hatzes, A. P."],["dc.contributor.author","Korth, J."],["dc.contributor.author","Kürster, M."],["dc.contributor.author","Kuzuhara, M."],["dc.contributor.author","Rodríguez, P. Montañes"],["dc.contributor.author","Murgas, F."],["dc.contributor.author","Narita, N."],["dc.contributor.author","Nespral, D."],["dc.contributor.author","Pätzold, M."],["dc.contributor.author","Persson, C. M."],["dc.contributor.author","Quirrenbach, A."],["dc.contributor.author","Rauer, H."],["dc.contributor.author","Redfield, S."],["dc.contributor.author","Reiners, A."],["dc.contributor.author","Ribas, I."],["dc.contributor.author","Smith, A. M. S."],["dc.contributor.author","Van Eylen, V."],["dc.contributor.author","Winn, J. N."],["dc.contributor.author","Zechmeister, M."],["dc.date.accessioned","2020-12-10T18:11:44Z"],["dc.date.available","2020-12-10T18:11:44Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1051/0004-6361/201834001"],["dc.identifier.eissn","1432-0746"],["dc.identifier.issn","0004-6361"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74123"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Detection and Doppler monitoring of K2-285 (EPIC 246471491), a system of four transiting planets smaller than Neptune"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]