J/AJ/168/252ivo://CDS.VizieR/J/AJ/168/252doi:10.26093/cds/vizier.51680252CDSArtigau E.Cadieux C.Cook N.J.Doyon R.Dauplaise L.Arnold L.,Cadieux M.Donati J.-F.Cristofari P.Delfosse X.Fouque P.,Moutou C.Larue P.Allart R.2025-08-01T20:10:06Z2025-07-08T14:37:32ZCDS support team

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

cds-question@unistra.frspectroscopyvisible-astronomyinfrared-astronomyeffective-temperaturemetallicityThe detection of stellar variability often relies on the measurement of selected activity indicators, such as coronal emission lines and nonthermal emissions. On the flip side, the effective stellar temperature is normally seen as one of the key fundamental parameters (with mass and radius) to understanding the basic physical nature of a star and its relation with its environment (e.g., planetary instellation). We present a novel approach for measuring disk-averaged temperature variations to sub-Kelvin accuracy inspired by algorithms developed for precision radial velocity (pRV). This framework uses the entire content of the spectrum, not just preidentified lines, and can be applied to existing data obtained with high-resolution spectrographs. We demonstrate the framework by recovering the known rotation periods and temperature modulation of Barnard star and AU Mic in data sets obtained in the infrared with SPIRou at CHFT and at optical wavelengths on {epsilon} Eridani with HARPS at ESO 3.6m telescope. We use observations of the transiting hot Jupiter HD189733b, obtained with SPIRou, to show that this method can unveil the minute temperature variation signature expected during the transit event, an effect analogous to the Rossiter-McLaughlin effect but in temperature space. This method is a powerful new tool for characterizing stellar activity, and in particular temperature and magnetic features at the surfaces of cool stars, affecting both pRV and transit spectroscopic observations. We demonstrate this method in the context of high-resolution spectroscopy but it could be used at lower resolution.2024AJ....168..252Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/168/252CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/cfht : Log of CFHT Exposures (CADC, 1979-)B/eso : ESO Science Archive Catalog (ESO, 1991-2025)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)J/A+A/506/303 : CoRoT-7 radial velocities (Queloz+, 2009)J/ApJ/744/138 : Calibrated visibilities of {epsilon} Eri (Baines+, 2012)J/A+A/544/A106 : p-mode frequencies of the solar twin 18 Sco (Bazot+, 2012)J/A+A/541/A9 : M dwarfs activity and radial velocity (Gomes da Silva+, 2012)J/other/Nat/563.365 : Barnard's star radial velocity curve (Ribas+, 2018)J/A+A/623/A44 : CARMENES M-dwarfs activity indicators (Schoefer+, 2019)J/A+A/649/A6 : Gaia Cat. of Nearby Stars - GCNS (Gaia collaboration, 2021)J/AJ/162/181 : RV & Hipparcos positions: epsilon Eridani (Llop-sayson+, 2021)J/AJ/162/61 : RV follow up of Barnard's star with HPF (Lubin+, 2021)J/A+A/654/A159 : CHEOPS photometry of Au Mic b transits in 2020 (Szabo+, 2021)J/A+A/666/A196 : Proxima telluric-corrected ESPRESSO RV (Allart+, 2022)J/A+A/664/A34 : Sun and HD128621 spectra (Al Moulla+, 2022)J/AJ/164/96 : SPIRou and IRD radial velocity of TOI-1452 (Cadieux+, 2022)J/AJ/163/19 : EXPRES. III. Phot. & RV of eps Eridani (Roettenbacher+, 2022)J/A+A/659/L7 : AU Mic b and c transits with CHEOPS (Szabo+, 2022)J/A+A/674/A110 : Gl 388 (AD Leo) RV curves (Carmona+, 2023)J/A+A/678/A207 : SPIRou GJ 876 and GJ 1148 RV curves (Moutou+, 2023)http://archive.eso.org/ : ESO Science Archivehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/168/252https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/168/252http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/168/252https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/168/252https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/168/252http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/168/252GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/168/252/tablea1 (*Parameters for all stars used as templates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/168/252/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/168/252/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/168/252/tablea1?GETtext/xml+votable180.050000true353.7935933-2.38905940.0055555555555555566/725 876 1875 2472 4268 4366 5009 5420 5726 6672 6990 8235 8790 8843 11671 12644 13082 13858 13912 14825 15311 16092 16518 16947 17149 17271 17314 17434 17851 17870 17944 18496 18641 18761 18785-18786 18929 18943 19306 19466 20145 20557 20593 20640 20701 21056 21206 21394 21477 21925 22036 22818 23342 23583 24713 24831 25312 25604 25614 25885 25989 26242 26496 26771 26790 26844 26906 26961 26972 28341 29684 30343 30455 30707 30848 31014 31029 31191 31433 31751 32259 32335 32986 33210 33212 33243 33386 33552 33608 33705 33717 33875 34446 34471 34481 34817 34924 35079 35532 35954 36614 36635 36697 37047 37418 38162 38311 38414 38728 38975 38998 39034 39500 40143 40251 40442 40833 41058 42595 42986 42989 43228 43432 43525 43580 43631 44243 44284 44431 44740 44879 46800 46843 46967 47590 47681 48500 48519 48530 48652 49103https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/168/252?format=asciiOpticalInfrareddefaultJ/AJ/168/252/tablea1*Parameters for all stars used as templatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSimbad identifiermeta.id;meta.maincharInstInstrument identifier(s) (1)meta.id;instrcharTeff[2863/6319] Effective temperature from Gaia DR3 (I/355)Kphys.temperature.effectiveint[Fe/H][-0.5/0.5] Metallicity from Gaia DR3 (I/355)log(Sun)phys.abund.Zfloatlogg[4/5.2] log surface gravity from Gaia DR3 (I/355)log(cm.s**-2)phys.gravityfloatVsys[-9.8e4/1.5e5] Systemic velocitym/sphys.velocintSimbadSimbad column added by the CDSmeta.ref.urlchar_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