J/A+A/676/A90ivo://CDS.VizieR/J/A+A/676/A90doi:10.26093/cds/vizier.36760090CDSRainer M.Desidera S.Borsa F.Barbato D.Biazzo K.Bonomo A.,Gratton R.Messina S.Scandariato G.Affer L.Benatti S.,Carleo I.Cabona L.Covino E.Lanza A.F.Ligi R.Maldonado J.,Mancini L.Nardiello D.Sicilia D.Sozzetti A.Bignamini A.,Cosentino R.Knapic C.Martinez Fiorenzano A.F.Molinari E.,Pedani M.Poretti E.2024-11-06T20:05:39Z2023-08-11T07:53:04ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsspectroscopyThe leading spectrographs used for exoplanets' search and characterization offer online data reduction softwares (DRS) that yield, as an ancillary result, the full-width at half-maximum (FWHM) of the cross-correlation function (CCF) that is used to estimate the radial velocity of the host star. The FWHM also contains information on the stellar projected rotational velocity v_eq_sini_*_, if appropriately calibrated. We wanted to establish a simple relationship to derive the v_eq_sini_*_ directly from the FWHM computed by the HARPS-N DRS in the case of slow-rotating solar-like stars. This may also help to recover the stellar inclination i_*_, which in turn affects the exoplanets' parameters. We selected stars with an inclination of the spin axis compatible with 90 deg by looking at exoplanetary transiting systems with known small sky-projected obliquity: for these calibrators, we can presume that v_eq_sini_*_ is equal to stellar equatorial velocity v_eq_. We derived their rotational periods from photometric and spectroscopic time series and their radii from the spectral energy distribution (SED) fitting. This allowed us to recover their v_eq_, which could be compared to the FWHM values of the CCFs obtained both with G2 and K5 spectral-type masks. We obtained an empirical relation for each mask: this can be used to derive v_eq_sini_*_ directly fromFWHMvalues for slow rotators (FWHM<20km/s). We applied our relations to 273 exoplanet-host stars observed with HARPS-N, obtaining homogeneous v_eq_sini_*_ measurements. When possible, we compared our results with the literature ones to confirm the reliability of our work. We were also able to recover or constrain i_*_ for 12 objects with no prior v_eq_sini_*_ estimation. We provide two simple empirical relations to directly convert the HARPS-N FWHM obtained with the G2 and K5 mask to a v_eq_sini_*_ value. We tested our results on a statistically significant sample, and we found a good agreement with literature values found with more sophisticated methods for stars with logg>3.5. We also tried our relation on HARPS and SOPHIE data, and we conclude that it can be used as it is also on FWHM derived by HARPS DRS with the G2 and K5 mask, and it may be adapted to the SOPHIE data as long as the spectra are taken in high-resolution mode.2023A&A...676A..90Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/676/A90CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/676/A90https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/676/A90http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/676/A90https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/676/A90https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/676/A90http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/676/A90GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/676/A90/table4 (Exoplanet-host stars vsini)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/676/A90/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/676/A90/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/676/A90/table4?GETtext/xml+votable180.050000true339.102190847.86181420.0055555555555555566/270 279 320 328 340 376 437 467 876 1031-1032 1036 1066 1275 1597 2497 2551 2579 2711 2737 3015 3115 3121 3715 3876 4104 4268 4271 4273 4285 4429 4441 4521 4632 4651 4659 4673 4696 4730 4733 4990 5009 5067 5170 5309 5475 5614 6017 6181 6217 6539 6638 7036 7208 7240 7264 7746 8197 8478 8825 9173 9355 9459 9482-9483 9524 9651 9753 9893 10146 10149 10225 10407 10654 10701 10730 10953 11087 11326 11455 11699 12502 12644 12646 12983 13044 13143 13439 13569 13680 13702 13752 14116 14278 14412 14548 14573 14579 14584 14608 14757 14762 14767 14826 14830 14914 14918 14920-14921 14924 14930-14931 14935-14936 14938-14939 14962-14963 14966 14970 14975 15109 15122 15129 15131 15134 15143 15146 15150 15153 15173 15200 15218 15310 15683 15950 15973 17172 17425 17851 18033 18093 18132 18147 18163 18208 18350 18361 18434 18453 18459 18473 18539 18569 18614 18747 18785 18835 18881 19619 19912 20020 20072 20116 20145 20186 20339 20382 21254 21406 21838 21876 22001 22065 22078 22252 22396 22505 22708 22816 22837 24019 24039 24205 24223 24312 24409 25194 25283 25423 25427 25443 25463 25466 25604 25624 25673 25721 25725 25783 25885 26019 26062 26242 26521 26771 26844 26918 26938 26953 26959 26972 26977-26978 26990-26992 27001 27056 27085 27220 27358 27393 27548 27616 27680 27750 27780 27881 28130 28548 29022 29520 29683 29838 30009 30013 30176 30526 31494 31541 31641 31860 32217 32259 32335 32561 32564 32659 32749 36506 36667 40250 40862 44436 44474 45051 48121 48530 49103https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/676/A90?format=asciidefaultJ/A+A/676/A90/table4Exoplanet-host stars vsiniSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject namemeta.id;meta.maincharSpTypeSpectral Typesrc.spTypecharMaskMask used by HARPS-N DRSmeta.id;instrcharFWHMFWHM computed by HARPS-N DRSkm/sphys.angSizefloatvsiniComputed vsinikm/sphys.veloc.rotatfloate_vsiniError on the computed vsinikm/sstat.error;phys.veloc.rotatfloatl_vsinilLimit flag on vsinilmeta.code.errorcharvsinil? Literature vsini (if any)km/sphys.veloc.rotatfloatnullablee_vsinil? Error on the literature vsini (if any)km/sstat.errorfloatnullableAutReference for the literature vsini (first author name)meta.bib.authorcharBibCodeReference for the literature vsini (BibCode)meta.ref;pos.framechar_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