J/AJ/166/73ivo://CDS.VizieR/J/AJ/166/73doi:10.26093/cds/vizier.51660073CDSMonier R.Bowman D.M.Lebreton Y.Deal M.2024-11-06T20:19:00Z2024-03-26T07:40:00ZCDS support team

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

cds-question@unistra.fra-starschemical-abundancesvisible-astronomyThe analysis of the available Transiting Exoplanet Survey Satellite (TESS) light curves of {alpha}Sex (HD87887) reveals low-frequency pulsations with a period of about 9.1hr in this spectroscopic A0III standard star. The IUE observations in 1992 December reveal large flux variations both in the far-UV and in the mid-UV, which are accompanied by variations of the brightness in the V band recorded by the the Fine Error Sensor on board IUE. The ultraviolet variability could be due to an eclipse by an hitherto undetected companion of smaller radius, possibly 2.5R{sun}, but this needs confirmation by further monitoring possibly with TESS. An abundance determination yields solar abundances for most elements. Only carbon and strontium are underabundant and titanium, vanadium, and baryum mildly overabundant. Identification is provided for most of the lines absorbing more than 2% in the optical spectrum of {alpha}Sex. Stellar evolution modeling shows that {alpha}Sex is near the terminal-age main sequence, and its mass, radius, and age are estimated to be M=2.57{+/-}0.32M{sun}, R=3.07{+/-}0.90R{sun}, A=385{+/-}77Myr, respectively.2023AJ....166...73Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/166/73CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/polarbase : PolarBase spectropolarimetric (ESPaDOnS, NARVAL) (Petit+, 2014)II/215 : uvby-beta Catalogue (Hauck+ 1997)I/259 : The Tycho-2 Catalogue (Hog+ 2000)I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)J/ApJ/573/359 : Rotational velocities of B stars from BSC (Abt+, 2002)J/A+A/393/897 : Rotational velocities of A-type stars II. (Royer+, 2002)J/A+A/406/987 : Elemental abundances of three CP stars (Pintado+, 2003)J/MNRAS/389/869 : Multiplicity among bright stellar systems (Eggleton+, 2008)J/MNRAS/427/343 : Infrared excesses of Hipparcos stars (McDonald+, 2012)J/PASP/126/469 : PolarBase catalogue of stellar spectra (Petit+, 2014)J/AJ/153/16 : Calibrator stars cat. for interferometers (Swihart+, 2017)J/MNRAS/490/4040 : {delta}Scuti & {gamma}Doradus stars in TESS (Antoci+, 2019)J/other/NatAs/3.760 : Blue supergiants low-freq gravity waves (Bowman+, 2019)J/A+A/623/A72 : Bin Hipparcos stars from Gaia pm anomaly (Kervella+, 2019)J/MNRAS/485/2380 : Gaia-derived luminosities Kepler A/F stars (Murphy+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/166/73https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/166/73http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/166/73https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/166/73https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/166/73http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/166/73GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/166/73/table4Line identifications for {alpha} SexrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOWave[3900/6679]? Observed wavelength; Angstroms0.1nmem.wl;phys.atmol.transitiondoublenullableLWave[3900/6679]? Laboratory wavelength; Angstroms0.1nmem.wldoublenullableSpeciesSpecies identifiermeta.id;meta.maincharloggf[-4.29/1.16]? log oscillatory strengthphys.atmol.collStrengthfloatnullableElow[0/199942]? Lower energyphys.energy;stat.mindoublenullableRefReferencemeta.ref;pos.framechar