Stock, Johanna

[["dc.bibliographiccitation.firstpage","A236"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","642"],["dc.contributor.author","Kemmer, J."],["dc.contributor.author","Stock, S."],["dc.contributor.author","Kossakowski, D."],["dc.contributor.author","Kaminski, A."],["dc.contributor.author","Molaverdikhani, K."],["dc.contributor.author","Schlecker, M."],["dc.contributor.author","Caballero, J. A."],["dc.contributor.author","Amado, P. J."],["dc.contributor.author","Astudillo-Defru, N."],["dc.contributor.author","Zechmeister, M."],["dc.date.accessioned","2021-04-14T09:58:48Z"],["dc.date.available","2021-04-14T09:58:48Z"],["dc.date.issued","2020"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/84192"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation.eissn","1432-0746"],["dc.relation.issn","0004-6361"],["dc.title","Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","A17"],["dc.bibliographiccitation.journal","Astronomy & Astrophysics"],["dc.bibliographiccitation.volume","659"],["dc.contributor.author","Kemmer, J."],["dc.contributor.author","Dreizler, S."],["dc.contributor.author","Kossakowski, D."],["dc.contributor.author","Stock, S."],["dc.contributor.author","Quirrenbach, A."],["dc.contributor.author","Caballero, J. A."],["dc.contributor.author","Amado, P. J."],["dc.contributor.author","Collins, K. A."],["dc.contributor.author","Espinoza, N."],["dc.contributor.author","Herrero, E."],["dc.contributor.author","Zechmeister, M."],["dc.date.accessioned","2022-04-01T10:00:42Z"],["dc.date.available","2022-04-01T10:00:42Z"],["dc.date.issued","2022"],["dc.description.abstract","We report the discovery of GJ 3929 b, a hot Earth-sized planet orbiting the nearby M3.5 V dwarf star, GJ 3929 (G 180-18, TOI-2013). Joint modelling of photometric observations from TESS sectors 24 and 25 together with 73 spectroscopic observations from CARMENES and follow-up transit observations from SAINT-EX, LCOGT, and OSN yields a planet radius of R b = 1.150 ± 0.040 R ⊕ , a mass of M b = 1.21 ± 0.42 M ⊕ , and an orbital period of P b = 2.6162745 ± 0.0000030 d . The resulting density of ρ b = 4.4 ± 1.6 g cm −3 is compatible with the Earth’s mean density of about 5.5 g cm −3 . Due to the apparent brightness of the host star ( J = 8.7 mag) and its small size, GJ 3929 b is a promising target for atmospheric characterisation with the JWST. Additionally, the radial velocity data show evidence for another planet candidate with P [c] = 14.303 ± 0.035 d, which is likely unrelated to the stellar rotation period, P rot = 122 ± 13 d, which we determined from archival HATNet and ASAS-SN photometry combined with newly obtained TJO data."],["dc.identifier.doi","10.1051/0004-6361/202142653"],["dc.identifier.pii","aa42653-21"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/105493"],["dc.notes.intern","DOI-Import GROB-530"],["dc.relation.eissn","1432-0746"],["dc.relation.issn","0004-6361"],["dc.title","Discovery and mass measurement of the hot, transiting, Earth-sized planet, GJ 3929 b"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","A39"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","628"],["dc.contributor.author","Luque, R."],["dc.contributor.author","Pallé, E."],["dc.contributor.author","Kossakowski, D."],["dc.contributor.author","Dreizler, S."],["dc.contributor.author","Kemmer, J."],["dc.contributor.author","Espinoza, N."],["dc.contributor.author","Burt, J."],["dc.contributor.author","Anglada-Escudé, G."],["dc.contributor.author","Béjar, V. J. S."],["dc.contributor.author","Caballero, J. A."],["dc.contributor.author","Collins, K. A."],["dc.contributor.author","Collins, K. I."],["dc.contributor.author","Cortés-Contreras, M."],["dc.contributor.author","Díez-Alonso, E."],["dc.contributor.author","Feng, F."],["dc.contributor.author","Hatzes, A."],["dc.contributor.author","Hellier, C."],["dc.contributor.author","Henning, T."],["dc.contributor.author","Jeffers, S. V."],["dc.contributor.author","Kaltenegger, L."],["dc.contributor.author","Kürster, M."],["dc.contributor.author","Madden, J."],["dc.contributor.author","Molaverdikhani, K."],["dc.contributor.author","Montes, D."],["dc.contributor.author","Narita, N."],["dc.contributor.author","Nowak, G."],["dc.contributor.author","Ofir, A."],["dc.contributor.author","Oshagh, M."],["dc.contributor.author","Parviainen, H."],["dc.contributor.author","Quirrenbach, A."],["dc.contributor.author","Reffert, S."],["dc.contributor.author","Reiners, A."],["dc.contributor.author","Rodríguez-López, C."],["dc.contributor.author","Schlecker, M."],["dc.contributor.author","Stock, S."],["dc.contributor.author","Trifonov, T."],["dc.contributor.author","Winn, J. N."],["dc.contributor.author","Zapatero Osorio, M. R."],["dc.contributor.author","Zechmeister, M."],["dc.contributor.author","Amado, P. J."],["dc.contributor.author","Anderson, D. R."],["dc.contributor.author","Batalha, N. E."],["dc.contributor.author","Bauer, F. F."],["dc.contributor.author","Bluhm, P."],["dc.contributor.author","Burke, C. J."],["dc.contributor.author","Butler, R. P."],["dc.contributor.author","Caldwell, D. A."],["dc.contributor.author","Chen, G."],["dc.contributor.author","Crane, J. D."],["dc.contributor.author","Dragomir, D."],["dc.contributor.author","Dressing, C. D."],["dc.contributor.author","Dynes, S."],["dc.contributor.author","Jenkins, J. M."],["dc.contributor.author","Kaminski, A."],["dc.contributor.author","Klahr, H."],["dc.contributor.author","Kotani, T."],["dc.contributor.author","Lafarga, M."],["dc.contributor.author","Latham, D. W."],["dc.contributor.author","Lewin, P."],["dc.contributor.author","McDermott, S."],["dc.contributor.author","Montañés-Rodríguez, P."],["dc.contributor.author","Morales, J. C."],["dc.contributor.author","Murgas, F."],["dc.contributor.author","Nagel, E."],["dc.contributor.author","Pedraz, S."],["dc.contributor.author","Ribas, I."],["dc.contributor.author","Ricker, G. R."],["dc.contributor.author","Rowden, P."],["dc.contributor.author","Seager, S."],["dc.contributor.author","Shectman, S. A."],["dc.contributor.author","Tamura, M."],["dc.contributor.author","Teske, J."],["dc.contributor.author","Twicken, J. D."],["dc.contributor.author","Vanderspeck, R."],["dc.contributor.author","Wang, S. X."],["dc.contributor.author","Wohler, B."],["dc.date.accessioned","2020-12-10T18:11:50Z"],["dc.date.available","2020-12-10T18:11:50Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1051/0004-6361/201935801"],["dc.identifier.eissn","1432-0746"],["dc.identifier.issn","0004-6361"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74158"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Planetary system around the nearby M dwarf GJ 357 including a transiting, hot, Earth-sized planet optimal for atmospheric characterization"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","A124"],["dc.bibliographiccitation.journal","Astronomy & Astrophysics"],["dc.bibliographiccitation.volume","656"],["dc.contributor.author","Kossakowski, D."],["dc.contributor.author","Kemmer, J."],["dc.contributor.author","Bluhm, P."],["dc.contributor.author","Stock, S."],["dc.contributor.author","Caballero, J. A."],["dc.contributor.author","Béjar, V. J. S."],["dc.contributor.author","Guillén, C. Cardona"],["dc.contributor.author","Lodieu, N."],["dc.contributor.author","Collins, K. A."],["dc.contributor.author","Oshagh, M."],["dc.contributor.author","Zechmeister, M."],["dc.date.accessioned","2022-01-11T14:05:46Z"],["dc.date.available","2022-01-11T14:05:46Z"],["dc.date.issued","2021"],["dc.description.abstract","We present the discovery of a transiting mini-Neptune around TOI-1201, a relatively bright and moderately young early M dwarf ( J ≈ 9.5 mag, ~600–800 Myr) in an equal-mass ~8 arcsecond-wide binary system, using data from the Transiting Exoplanet Survey Satellite, along with follow-up transit observations. With an orbital period of 2.49 d, TOI-1201 b is a warm mini-Neptune with a radius of R b = 2.415 ± 0.090 R ⊕ . This signal is also present in the precise radial velocity measurements from CARMENES, confirming the existence of the planet and providing a planetary mass of M b = 6.28 ± 0.88 M ⊕ and, thus, an estimated bulk density of 2.45 −0.42 +0.48 g cm −3 . The spectroscopic observations additionally show evidence of a signal with a period of 19 d and a long periodic variation of undetermined origin. In combination with ground-based photometric monitoring from WASP-South and ASAS-SN, we attribute the 19 d signal to the stellar rotation period ( P rot = 19–23 d), although we cannot rule out that the variation seen in photometry belongs to the visually close binary companion. We calculate precise stellar parameters for both TOI-1201 and its companion. The transiting planet is anexcellent target for atmosphere characterization (the transmission spectroscopy metric is 97 −16 +21 ) with the upcoming James Webb Space Telescope. It is also feasible to measure its spin-orbit alignment via the Rossiter-McLaughlin effect using current state-of-the-art spectrographs with submeter per second radial velocity precision."],["dc.description.abstract","We present the discovery of a transiting mini-Neptune around TOI-1201, a relatively bright and moderately young early M dwarf ( J ≈ 9.5 mag, ~600–800 Myr) in an equal-mass ~8 arcsecond-wide binary system, using data from the Transiting Exoplanet Survey Satellite, along with follow-up transit observations. With an orbital period of 2.49 d, TOI-1201 b is a warm mini-Neptune with a radius of R b = 2.415 ± 0.090 R ⊕ . This signal is also present in the precise radial velocity measurements from CARMENES, confirming the existence of the planet and providing a planetary mass of M b = 6.28 ± 0.88 M ⊕ and, thus, an estimated bulk density of 2.45 −0.42 +0.48 g cm −3 . The spectroscopic observations additionally show evidence of a signal with a period of 19 d and a long periodic variation of undetermined origin. In combination with ground-based photometric monitoring from WASP-South and ASAS-SN, we attribute the 19 d signal to the stellar rotation period ( P rot = 19–23 d), although we cannot rule out that the variation seen in photometry belongs to the visually close binary companion. We calculate precise stellar parameters for both TOI-1201 and its companion. The transiting planet is anexcellent target for atmosphere characterization (the transmission spectroscopy metric is 97 −16 +21 ) with the upcoming James Webb Space Telescope. It is also feasible to measure its spin-orbit alignment via the Rossiter-McLaughlin effect using current state-of-the-art spectrographs with submeter per second radial velocity precision."],["dc.identifier.doi","10.1051/0004-6361/202141587"],["dc.identifier.pii","aa41587-21"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/97745"],["dc.notes.intern","DOI-Import GROB-507"],["dc.relation.eissn","1432-0746"],["dc.relation.issn","0004-6361"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","A143"],["dc.bibliographiccitation.journal","Astronomy & Astrophysics"],["dc.bibliographiccitation.volume","666"],["dc.contributor.author","Kossakowski, D."],["dc.contributor.author","Kürster, M."],["dc.contributor.author","Henning, Th"],["dc.contributor.author","Trifonov, T."],["dc.contributor.author","Caballero, J. A."],["dc.contributor.author","Lafarga, M."],["dc.contributor.author","Bauer, F. F"],["dc.contributor.author","Stock, S."],["dc.contributor.author","Kemmer, J."],["dc.contributor.author","Jeffers, S. V."],["dc.contributor.author","Zechmeister, M."],["dc.date.accessioned","2022-12-01T08:31:01Z"],["dc.date.available","2022-12-01T08:31:01Z"],["dc.date.issued","2022"],["dc.description.abstract","Context.\n A challenge with radial-velocity (RV) data is disentangling the origin of signals either due to a planetary companion or to stellar activity. In fact, the existence of a planetary companion has been proposed, as well as contested, around the relatively bright, nearby M3.0 V star AD Leo at the same period as the stellar rotation of 2.23 days.\n \n \n Aims.\n We further investigate the nature of this signal. We introduce new CARMENES optical and near-IR RV data and an analysis in combination with archival data taken by HIRES and HARPS, along with more recent data from HARPS-N, GIANO-B, and HPF. Additionally, we address the confusion concerning the binarity of AD Leo.\n \n \n Methods.\n We consider possible correlations between the RVs and various stellar activity indicators accessible with CARMENES. We additionally applied models within a Bayesian framework to determine whether a Keplerian model, a red-noise quasi-periodic model using a Gaussian process, or a mixed model would explain the observed data best. We also exclusively focus on spectral lines potentially associated with stellar activity.\n \n \n Results.\n The CARMENES RV data agree with the previously reported periodicity of 2.23 days, correlate with some activity indicators, and exhibit chromaticity. However, when considering the entire RV data set, we find that a mixed model composed of a stable and a variable component performs best. Moreover, when recomputing the RVs using only spectral lines insensitive to activity, there appears to be some residual power at the period of interest. We therefore conclude that it is not possible to determinedly prove that there is no planet orbiting in synchronization with the stellar rotation given our data, current tools, machinery, and knowledge of how stellar activity affects RVs. We do rule out planets more massive than 27\n M\n ⊕\n (=0.084\n M\n Jup\n ). Likewise, we exclude any binary companion around AD Leo with M sin\n i\n greater than 3–6\n M\n Jup\n on orbital periods <14 yr."],["dc.identifier.doi","10.1051/0004-6361/202243773"],["dc.identifier.pii","aa43773-22"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/118045"],["dc.notes.intern","DOI-Import GROB-621"],["dc.relation.eissn","1432-0746"],["dc.relation.issn","0004-6361"],["dc.title","The CARMENES search for exoplanets around M dwarfs"],["dc.title.alternative","Stable radial-velocity variations at the rotation period of AD Leonis: A test case study of current limitations to treating stellar activity"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","A16"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","638"],["dc.contributor.author","Trifonov, T."],["dc.contributor.author","Lee, M. H."],["dc.contributor.author","Kürster, M."],["dc.contributor.author","Henning, Th."],["dc.contributor.author","Grishin, E."],["dc.contributor.author","Stock, S."],["dc.contributor.author","Tjoa, J."],["dc.contributor.author","Caballero, J. A."],["dc.contributor.author","Wong, K. H."],["dc.contributor.author","Bauer, F. F."],["dc.contributor.author","Quirrenbach, A."],["dc.contributor.author","Zechmeister, M."],["dc.contributor.author","Ribas, I."],["dc.contributor.author","Reffert, S."],["dc.contributor.author","Reiners, A."],["dc.contributor.author","Amado, P. J."],["dc.contributor.author","Kossakowski, D."],["dc.contributor.author","Azzaro, M."],["dc.contributor.author","Béjar, V. J. S."],["dc.contributor.author","Cortés-Contreras, M."],["dc.contributor.author","Dreizler, S."],["dc.contributor.author","Hatzes, A. P."],["dc.contributor.author","Jeffers, S. V."],["dc.contributor.author","Kaminski, A."],["dc.contributor.author","Lafarga, M."],["dc.contributor.author","Montes, D."],["dc.contributor.author","Morales, J. C."],["dc.contributor.author","Pavlov, A."],["dc.contributor.author","Rodríguez-López, C."],["dc.contributor.author","Schmitt, J. H. M. M."],["dc.contributor.author","Solano, E."],["dc.contributor.author","Barnes, R."],["dc.date.accessioned","2021-04-14T08:25:43Z"],["dc.date.available","2021-04-14T08:25:43Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1051/0004-6361/201936987"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/81716"],["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","Dynamical characterization of the multiple planet system GJ 1148 and prospects of habitable exomoons around GJ 1148 b"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","A119"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","636"],["dc.contributor.author","Stock, S."],["dc.contributor.author","Kemmer, J."],["dc.contributor.author","Reffert, S."],["dc.contributor.author","Trifonov, T."],["dc.contributor.author","Kaminski, A."],["dc.contributor.author","Dreizler, S."],["dc.contributor.author","Quirrenbach, A."],["dc.contributor.author","Caballero, J. A."],["dc.contributor.author","Reiners, A."],["dc.contributor.author","Jeffers, S. V."],["dc.contributor.author","Anglada-Escudé, G."],["dc.contributor.author","Ribas, I."],["dc.contributor.author","Amado, P. J."],["dc.contributor.author","Barrado, D."],["dc.contributor.author","Barnes, J. R."],["dc.contributor.author","Bauer, F. F."],["dc.contributor.author","Berdiñas, Z. M."],["dc.contributor.author","Béjar, V. J. S."],["dc.contributor.author","Coleman, G. A. L."],["dc.contributor.author","Cortés-Contreras, M."],["dc.contributor.author","Díez-Alonso, E."],["dc.contributor.author","Domínguez-Fernández, A. J."],["dc.contributor.author","Espinoza, N."],["dc.contributor.author","Haswell, C. A."],["dc.contributor.author","Hatzes, A."],["dc.contributor.author","Henning, T."],["dc.contributor.author","Jenkins, J. S."],["dc.contributor.author","Jones, H. R. A."],["dc.contributor.author","Kossakowski, D."],["dc.contributor.author","Kürster, M."],["dc.contributor.author","Lafarga, M."],["dc.contributor.author","Lee, M. H."],["dc.contributor.author","López González, M. J."],["dc.contributor.author","Montes, D."],["dc.contributor.author","Morales, J. C."],["dc.contributor.author","Morales, N."],["dc.contributor.author","Pallé, E."],["dc.contributor.author","Pedraz, S."],["dc.contributor.author","Rodríguez, E."],["dc.contributor.author","Rodríguez-López, C."],["dc.contributor.author","Zechmeister, M."],["dc.date.accessioned","2020-12-10T18:11:54Z"],["dc.date.available","2020-12-10T18:11:54Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1051/0004-6361/201936732"],["dc.identifier.eissn","1432-0746"],["dc.identifier.issn","0004-6361"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74176"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","The CARMENES search for exoplanets around M dwarfs"],["dc.title.alternative","Characterization of the nearby ultra-compact multiplanetary system YZ Ceti"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","A112"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","643"],["dc.contributor.author","Stock, S."],["dc.contributor.author","Nagel, E."],["dc.contributor.author","Kemmer, J."],["dc.contributor.author","Passegger, V. M."],["dc.contributor.author","Reffert, S."],["dc.contributor.author","Quirrenbach, A."],["dc.contributor.author","Caballero, J. A."],["dc.contributor.author","Czesla, S."],["dc.contributor.author","Béjar, V. J. S."],["dc.contributor.author","Cardona, C."],["dc.contributor.author","Díez-Alonso, E."],["dc.contributor.author","Herrero, E."],["dc.contributor.author","Lalitha, S."],["dc.contributor.author","Schlecker, M."],["dc.contributor.author","Tal-Or, L."],["dc.contributor.author","Rodríguez, E."],["dc.contributor.author","Rodríguez-López, C."],["dc.contributor.author","Ribas, I."],["dc.contributor.author","Reiners, A."],["dc.contributor.author","Amado, P. J."],["dc.contributor.author","Bauer, F. F."],["dc.contributor.author","Bluhm, P."],["dc.contributor.author","Cortés-Contreras, M."],["dc.contributor.author","González-Cuesta, L."],["dc.contributor.author","Dreizler, S."],["dc.contributor.author","Hatzes, A. P."],["dc.contributor.author","Henning, Th."],["dc.contributor.author","Jeffers, S. V."],["dc.contributor.author","Kaminski, A."],["dc.contributor.author","Kürster, M."],["dc.contributor.author","Lafarga, M."],["dc.contributor.author","López-González, M. J."],["dc.contributor.author","Montes, D."],["dc.contributor.author","Morales, J. C."],["dc.contributor.author","Pedraz, S."],["dc.contributor.author","Schöfer, P."],["dc.contributor.author","Schweitzer, A."],["dc.contributor.author","Trifonov, T."],["dc.contributor.author","Zapatero Osorio, M. R."],["dc.contributor.author","Zechmeister, M."],["dc.date.accessioned","2021-04-14T08:31:44Z"],["dc.date.available","2021-04-14T08:31:44Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1051/0004-6361/202038820"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/83697"],["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","Three temperate-to-warm super-Earths"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]