Oshagh, Mahmoudreza

[["dc.bibliographiccitation.firstpage","A30"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","603"],["dc.contributor.author","Santos, N. C."],["dc.contributor.author","Adibekyan, V."],["dc.contributor.author","Figueira, P."],["dc.contributor.author","Andreasen, D. T."],["dc.contributor.author","Barros, S. C. C."],["dc.contributor.author","Delgado-Mena, E."],["dc.contributor.author","Demangeon, O."],["dc.contributor.author","Faria, J. P."],["dc.contributor.author","Oshagh, M."],["dc.contributor.author","Sousa, S. G."],["dc.contributor.author","Viana, P. T. P."],["dc.contributor.author","Ferreira, A. C.S."],["dc.date.accessioned","2020-12-10T18:11:34Z"],["dc.date.available","2020-12-10T18:11:34Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1051/0004-6361/201730761"],["dc.identifier.eissn","1432-0746"],["dc.identifier.issn","0004-6361"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74067"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Observational evidence for two distinct giant planet populations"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","A13"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","635"],["dc.contributor.author","Faria, J. P."],["dc.contributor.author","Adibekyan, V."],["dc.contributor.author","Amazo-Gómez, E. M."],["dc.contributor.author","Barros, S. C. C."],["dc.contributor.author","Camacho, J. D."],["dc.contributor.author","Demangeon, O."],["dc.contributor.author","Figueira, P."],["dc.contributor.author","Mortier, A."],["dc.contributor.author","Oshagh, M."],["dc.contributor.author","Pepe, F."],["dc.contributor.author","Santos, N. C."],["dc.contributor.author","Gomes da Silva, J."],["dc.contributor.author","Costa Silva, A. R."],["dc.contributor.author","Sousa, S. G."],["dc.contributor.author","Ulmer-Moll, S."],["dc.contributor.author","Viana, P. T. P."],["dc.date.accessioned","2020-12-10T18:11:53Z"],["dc.date.available","2020-12-10T18:11:53Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1051/0004-6361/201936389"],["dc.identifier.eissn","1432-0746"],["dc.identifier.issn","0004-6361"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74169"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Decoding the radial velocity variations of HD 41248 with ESPRESSO"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","L8"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","635"],["dc.contributor.author","Akinsanmi, B."],["dc.contributor.author","Santos, N. C."],["dc.contributor.author","Faria, J. P."],["dc.contributor.author","Oshagh, M."],["dc.contributor.author","Barros, S. C. C."],["dc.contributor.author","Santerne, A."],["dc.contributor.author","Charnoz, S."],["dc.date.accessioned","2020-12-10T18:11:56Z"],["dc.date.available","2020-12-10T18:11:56Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1051/0004-6361/202037618"],["dc.identifier.eissn","1432-0746"],["dc.identifier.issn","0004-6361"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74189"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Can planetary rings explain the extremely low density of HIP 41378 𝑓?"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","A107"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","606"],["dc.contributor.author","Oshagh, M."],["dc.contributor.author","Santos, N. C."],["dc.contributor.author","Figueira, P."],["dc.contributor.author","Barros, S. C. C."],["dc.contributor.author","Donati, J.-F."],["dc.contributor.author","Adibekyan, V."],["dc.contributor.author","Faria, J. P."],["dc.contributor.author","Watson, C. A."],["dc.contributor.author","Cegla, H. M."],["dc.contributor.author","Dumusque, X."],["dc.contributor.author","Hébrard, E."],["dc.contributor.author","Demangeon, O."],["dc.contributor.author","Dreizler, S."],["dc.contributor.author","Boisse, I."],["dc.contributor.author","Deleuil, M."],["dc.contributor.author","Bonfils, X."],["dc.contributor.author","Pepe, F."],["dc.contributor.author","Udry, S."],["dc.date.accessioned","2020-12-10T18:11:35Z"],["dc.date.available","2020-12-10T18:11:35Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1051/0004-6361/201731139"],["dc.identifier.eissn","1432-0746"],["dc.identifier.issn","0004-6361"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16812"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74074"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.intern","Merged from goescholar"],["dc.relation.orgunit","Fakultät für Physik"],["dc.title","Understanding stellar activity-induced radial velocity jitter using simultaneous K2 photometry and HARPS RV measurements"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","A31"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","588"],["dc.contributor.author","Faria, J. P."],["dc.contributor.author","Haywood, R. D."],["dc.contributor.author","Brewer, B. J."],["dc.contributor.author","Figueira, P."],["dc.contributor.author","Oshagh, M."],["dc.contributor.author","Santerne, A."],["dc.contributor.author","Santos, Nuno C."],["dc.date.accessioned","2018-11-07T10:16:09Z"],["dc.date.available","2018-11-07T10:16:09Z"],["dc.date.issued","2016"],["dc.description.abstract","Stellar activity can induce signals in the radial velocities of stars, complicating the detection of orbiting low-mass planets. We present a method to determine the number of planetary signals present in radial-velocity datasets of active stars, using only radial-velocity observations. Instead of considering separate fits with different number of planets, we use a birth-death Markov chain Monte Carlo algorithm to infer the posterior distribution for the number of planets in a single run. In a natural way, the marginal distributions for the orbital parameters of all planets are also inferred. This method is applied to HARPS data of CoRoT-7. We confidently recover the orbits of both CoRoT-7b and CoRoT-7c although the data show evidence for the presence of additional signals."],["dc.identifier.doi","10.1051/0004-6361/201527899"],["dc.identifier.isi","000373207800043"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/13435"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/40982"],["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/FP7/627202/EU//PASTIS"],["dc.relation.issn","1432-0746"],["dc.relation.orgunit","Fakultät für Physik"],["dc.title","Uncovering the planets and stellar activity of CoRoT-7 using only radial velocities"],["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","A8"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","611"],["dc.contributor.author","Serrano, L. M."],["dc.contributor.author","Barros, S. C. C."],["dc.contributor.author","Oshagh, M."],["dc.contributor.author","Santos, N. C."],["dc.contributor.author","Faria, J. P."],["dc.contributor.author","Demangeon, O."],["dc.contributor.author","Sousa, S. G."],["dc.contributor.author","Lendl, M."],["dc.date.accessioned","2020-12-10T18:11:36Z"],["dc.date.available","2020-12-10T18:11:36Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1051/0004-6361/201731206"],["dc.identifier.eissn","1432-0746"],["dc.identifier.issn","0004-6361"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74075"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Distinguishing the albedo of exoplanets from stellar activity"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","385"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Origins of Life and Evolution of Biospheres"],["dc.bibliographiccitation.lastpage","393"],["dc.bibliographiccitation.volume","46"],["dc.contributor.author","Figueira, P."],["dc.contributor.author","Faria, J. P."],["dc.contributor.author","Adibekyan, V. Zh."],["dc.contributor.author","Oshagh, M."],["dc.contributor.author","Santos, N. C."],["dc.date.accessioned","2020-12-10T14:11:46Z"],["dc.date.available","2020-12-10T14:11:46Z"],["dc.date.issued","2016"],["dc.identifier.doi","10.1007/s11084-016-9490-5"],["dc.identifier.eissn","1573-0875"],["dc.identifier.issn","0169-6149"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/71195"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","A Pragmatic Bayesian Perspective on Correlation Analysis"],["dc.title.alternative","The exoplanetary gravity - stellar activity case"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","A143"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","592"],["dc.contributor.author","Figueira, P."],["dc.contributor.author","Santerne, A."],["dc.contributor.author","Suarez Mascareno, A."],["dc.contributor.author","Gomes da Silva, J."],["dc.contributor.author","Abe, L."],["dc.contributor.author","Adibekyan, V. Zh."],["dc.contributor.author","Bendjoya, P."],["dc.contributor.author","Correia, A. C. M."],["dc.contributor.author","Delgado-Mena, E."],["dc.contributor.author","Faria, J. P."],["dc.contributor.author","Hebrard, G."],["dc.contributor.author","Lovis, C."],["dc.contributor.author","Oshagh, M."],["dc.contributor.author","Rivet, J.-P."],["dc.contributor.author","Santos, Nuno C."],["dc.contributor.author","Suarez, O."],["dc.contributor.author","Vidotto, A. A."],["dc.date.accessioned","2018-11-07T10:10:38Z"],["dc.date.available","2018-11-07T10:10:38Z"],["dc.date.issued","2016"],["dc.description.abstract","Aims. Several studies suggest that the activity level of a planet-host star can be influenced by the presence of a close-by orbiting planet. Moreover, the interaction mechanisms that have been proposed, magnetic interaction and tidal interaction, exhibit a very different dependence on the orbital separation between the star and the planet. A detection of activity enhancement and characterization of its dependence on planetary orbital distance can, in principle, allow us to characterize the physical mechanism behind the activity enhancement. Methods. We used the HARPS-N spectrograph to measure the stellar activity level of HD80606 during the planetary periastron passage and compared the activity measured to that close to apastron. Being characterized by an eccentricity of 0.93 and an orbital period of 111 days, the system's extreme variation in orbital separation makes it a perfect target to test our hypothesis. Results. We find no evidence for a variation in the activity level of the star as a function of planetary orbital distance, as measured by all activity indicators employed: log(R-HK'), H-alpha, NaI, and HeI. None of the models employed, whether magnetic interaction or tidal interaction, provides a good description of the data. The photometry revealed no variation either, but it was strongly affected by poor weather conditions. Conclusions. We find no evidence for star-planet interaction in HD80606 at the moment of the periastron passage of its very eccentric planet. The straightforward explanation for the non-detection is the absence of interaction as a result of a low magnetic field strength on either the planet or the star and of the low level of tidal interaction between the two. However, we cannot exclude two scenarios: i) the interaction can be instantaneous and of magnetic origin, being concentrated on the substellar point and its surrounding area; and ii) the interaction can lead to a delayed activity enhancement. In either scenario, a star-planet interaction would not be detectable with the dataset described in this paper."],["dc.identifier.doi","10.1051/0004-6361/201628981"],["dc.identifier.isi","000384722600171"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14277"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/39894"],["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/FP7/627202/EU/Planet Analysis and Small Transit Investigation Software/PASTIS"],["dc.relation.issn","1432-0746"],["dc.relation.orgunit","Fakultät für Physik"],["dc.title","Is the activity level of HD80606 influenced by its eccentric planet?"],["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"]]