J/A+A/682/A136ivo://CDS.VizieR/J/A+A/682/A136doi:10.26093/cds/vizier.36820136CDSClaudi R.Bruno G.Fossati L.Lanza A.F.Maggio A.Micela G.,Maldonado J.Benatti S.Biazzo K.Bignamini A.Cabona L.Carleo I.,Danielski C.Desidera S.Malavolta L.Mancini L.Montalto M.,Nardiello D.Rainer M.Scandariato G.Sozzetti A.Cosentino R.,Covino E.Di Fabrizio L.Ghedina A.Lorenzi V.Molinari E.,Molinaro M.Pagano I.Piotto G.Poretti E.2024-11-06T20:06:52Z2024-07-18T15:27:22ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frstellar-activitymultiple-starsexoplanetsvisible-astronomyeffective-temperatureStellar activity is the most relevant types of astrophysical noise that affect the discovery and characterization of extrasolar planets. On the other hand, the amplitude of stellar activity could hint at an interaction between the star and a close-in giant planet. Progress has been made in recent years in understanding how to deal with stellar activity and search for observational evidence of star-planet interactions. The aim of this work is to characterize the chromospheric activity of stars hosting short-period exoplanets by studying the correlations between the chromospheric emission (CE) in the CaII H&K and the planetary parameters. We measured CE in the CaII H&K lines using more than 1900 high-resolution spectra of a sample composed of 76 targets, observed with the HARPS-N spectrograph between 2012 and 2020. We transformed the fluxes into bolometric- and photospheric-corrected chromospheric emission ratios, R'_HK_. Furthermore, we completed the sample of hosts digging for data in previous works. Stellar parameters T_eff_, B-V, and V were retrieved homogeneously from the Gaia DR3. Then, M*, R*, and ages were determined from isochrone fitting. We retrieved planetary data from the literature and catalogs. The search for correlations between the log(R'_HK_) and planetary parameters have been performed through both Spearman's rank and its statistics as well as the more sophisticated Gaussian mixture model method. We found that the distribution of log(R'_HK_) for the transiting planet hosts is different from the distribution of field main-sequence and sub-giant stars. The log(R'_HK_) of planetary hosts is correlated with planetary parameters proportional to the planetary radius to the power of n (R_P_^n^, indicating a common origin for the correlations. The statistical analysis has also highlighted four clusters of host stars with different behavior in terms of their stellar activity with respect to the planetary surface gravity. Some of the host stars have a value of log(R'_HK_) that is lower than the basal level of activity for main sequence stars. The planets of these systems are very close to filling their Roche lobe, suggesting that they evaporate through hydrodynamic escape under the strong irradiation of the host star, creating shrouds that absorb the core of the chromospheric resonance lines.2024A&A...682A.136Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/682/A136CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/682/A136https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/682/A136http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/682/A136https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/682/A136https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/682/A136http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/682/A136GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/682/A136/table2 (For all systems, the table lists Gaia DR3 id., and (B-V), and Teff obtained by Gaia Collaboration (2018A&A...616A...1G) as explained in the text)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/682/A136/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/682/A136/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/682/A136/table2?GETtext/xml+votable180.050000true133.149213128.33082080.0055555555555555566/790 876 935 1275 2308 2532 2551 2584 2711 3344 3876 4651 4990 5009 5475 5730 6017 6181 6349 6381 6638 7036 7208 7240 8197 8237 8825 9173 9355 9459 9482 9524 9811 10407 10654 10701 10730 10953 12424 12644 12862 12983 13143 13439 13569 13680 13702 13941 14573 14585 14744 14767 14772 14825-14826 14886 14914 14924 14936 14939 14971 15029 15040 15119 15129 15131 15143 15149 15159 15218 15950 17172 17851 18093 18943 20116 20186 20339 20382 21254 21876 21989 22001 22065 22078 22505 22519 22816 24409 25194 25427 25721 25885 26019 26062 26771 26844 26918 28400 28548 29683 30009 30344 30466 30485 31541 31641 32564 32727 32749 33723 35210 35993 36142 36667 38452 39487 42936 43625 43775 43847 44648 45051 46421 46437 47476 48945 49103https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/682/A136?format=asciiOpticaldefaultJ/A+A/682/A136/table2For all systems, the table lists Gaia DR3 id., and (B-V), and Teff obtained by Gaia Collaboration (2018A&A...616A...1G) as explained in the textSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSystemSystem namemeta.id;pos.framecharn_System[abcd, ] Note on System (1)meta.notecharGaiaDR3Gaia DR3 identification numbermeta.idB-VB-V oolour indexmagphot.color;em.opt.B;em.opt.Vfloate_B-V? B-V oolour index errormagstat.error;phot.color;em.opt.BfloatnullableTeffEffective temperatureKphys.temperature.effectiveinte_TeffEffective temperature errorKstat.error;phys.temperature.effectiveintr_Teff? Effective temperature reference (3)meta.ref;pos.frameintnullableSMWOSMWO activity indexphot.flux;arith.ratiofloate_SMWO? SMWO activity index errorstat.errorfloatnullabler_SMWO? SMWO activity index reference (3)meta.ref;pos.frameintnullablelog(R'HK)Nlog(R'HK) activity index obtained with Noyes et al. (1984ApJ...279..763N) procedure (2)phot.flux;arith.ratiofloate_log(R'HK)N? log(R'HK) activity index obtained with Noyes et al. (1984ApJ...279..763N) procedure errorstat.errorfloatnullablelog(R'HK)Mlog(R'HK) activity index obtained with Mittag et al. (2013A&A...549A.117M) procedure (2)phot.flux;arith.ratiofloate_log(R'HK)M? log(R'HK) activity index obtained with Mittag et al. (2013A&A...549A.117M) procedure errorstat.errorfloatnullablerms? rms of the several measured time series (R'HKx10^5^rms)instr.det.noisefloatnullable_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main