J/ApJ/754/69ivo://CDS.VizieR/J/ApJ/754/69doi:10.26093/cds/vizier.17540069CDSLinsky J.L.Bushinsky R.Ayres T.France K.2021-08-04T12:31:35Z2014-04-03T14:56:06ZCDS support team

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

cds-question@unistra.frspectroscopyultraviolet-astronomyf-starsradial-velocityWe compare high-resolution ultraviolet spectra of the Sun and thirteen solar-mass main-sequence stars with different rotational periods that serve as proxies for their different ages and magnetic field structures. In this, the second paper in the series, we study the dependence of ultraviolet emission-line centroid velocities on stellar rotation period, as rotation rates decrease from that of the Pleiades star HII314 (P_rot_=1.47days) to {alpha} Cen A (P_rot_=28days). Our stellar sample of F9 V to G5 V stars consists of six stars observed with the Cosmic Origins Spectrograph on the Hubble Space Telescope (HST) and eight stars observed with the Space Telescope Imaging Spectrograph on HST. We find a systematic trend of increasing redshift with more rapid rotation (decreasing rotation period) that is similar to the increase in line redshift between quiet and plage regions on the Sun. The fastest-rotating solar-mass star in our study, HII314, shows significantly enhanced redshifts at all temperatures above logT=4.6, including the corona, which is very different from the redshift pattern observed in the more slowly rotating stars. This difference in the redshift pattern suggests that a qualitative change in the magnetic-heating process occurs near P_rot_=2days. We propose that HII314 is an example of a solar-mass star with a magnetic heating rate too large for the physical processes responsible for the redshift pattern to operate in the same way as for the more slowly rotating stars. HII314 may therefore lie above the high activity end of the set of solar-like phenomena that is often called the "solar-stellar connection."2012ApJ...754...69Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/754/69CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)J/ApJS/187/149 : StarCAT: STIS UV echelle spectra of stars (Ayres, 2010)J/A+A/493/1099 : CaII HK emission in rapidly rotating stars (Schroeder+, 2009)J/A+A/415/331 : HST/STIS spectra of alpha Cen A (Pagano+, 2004)J/A+A/397/147 : Activity-rotation relationship in stars (Pizzolato+ 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/754/69https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/754/69http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/754/69https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/754/69https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/754/69http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/754/69GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/754/69/table5 (Emission line redshifts using the ClI 1351{AA} line as a fiducial mark for the photospheric radial velocity)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/754/69/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/754/69/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/754/69/table5?GETtext/xml+votable180.050000true56.083708124.79616780.0055555555555555566/322 496 5413 7763 11856 12644 23230 24151 28696 33849 39693 40892 41763https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/754/69?format=asciiUVdefaultJ/ApJ/754/69/table5Emission line redshifts using the ClI 1351{AA} line as a fiducial mark for the photospheric radial velocityNameStar namemeta.id;meta.mainprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintemeta.ref.urlcharSpTMK spectral typesrc.spTypecharInstInstrument (1)meta.id;instrcharf_ProtLimit or uncertainty flag on Protmeta.codecharProt[1.4/28]? Rotational perioddtime.periodfloatnullableV(SiIV)[-19/66]? SiIV ({lambda}1393) velocity (2)phys.velocfloatnullableV(CIV)[-18/40]? CIV ({lambda}1548) velocity (2)phys.velocfloatnullableV(ClI)[-31/53]? ClI ({lambda}1351.657) velocityphys.velocfloatnullableV(Si-Cl)c[10/22]? COS velocity difference (V(SiIV)-V(ClI)) (3)phys.veloc;arith.difffloatnullableu_V(Si-Cl)s[~] Uncertainty flag on V(Si-Cl)smeta.code.errorcharV(Si-Cl)s[2.3/16.3] STIS velocity difference (V(SiIV)-V(ClI))phys.veloc;arith.difffloatu_V(C-Cl)[~] Uncertainty flag on V(C-Cl)meta.code.errorcharV(C-Cl)[2.6/13]? STIS velocity difference (V(CIV)-V(ClI))phys.veloc;arith.difffloatnullableStarCATCross-match with the StarCAT (Ayres 20120, J/ApJS/187/149)meta.ref.urlintnullableSimbadNameSimbad column added by the CDSmeta.idnullable_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.mainnullable_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.mainnullableJ/ApJ/754/69/table6Emission line profile parameterse_FWHMn? Uncertainty in FWHMnkm/sstat.errorfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.mainInstHST InstrumentinstrcharIonIon identifier (1)phys.atmol.ionStagecharlam.0Laboratory wavelength; in Angstroms (2)0.1nmem.wldoublef_lam.0[bl ] blend (3)meta.codecharlam.n? Narrow component wavelength; in Angstroms0.1nmem.wldoublenullablee_lam.n? Uncertainty in lam.n0.1nmstat.errorfloatnullabledV.n? Narrow component radial velocity {Delta}v_n_km/sspect.dopplerVelocfloatnullablee_dV.n? Uncertainty in dV.nkm/sstat.errorfloatnullablel_FluxnLimit flag on Fluxnmeta.code.errorcharFluxnNarrow component flux; 1e-16 erg/s/cm^2^1e-19W.m**-2phot.fluxdoublee_Fluxn? Uncertainty in Fluxn1e-19W.m**-2stat.errorfloatnullableFWHMn? Narrow component Full-Width at Half-Maximumkm/sspect.line.widthfloatnullablef_FWHMn[)] assumed value of FWHMn (4)meta.codecharlam.b? Broad component wavelength; in Angstroms0.1nmem.wldoublenullablee_lam.b? Uncertainty in lam.b0.1nmstat.errorfloatnullabledV.b? Broad component radial velocity {Delta}v_b_km/sspect.dopplerVelocfloatnullablee_dV.b? Uncertainty in dV.bkm/sstat.errorfloatnullableFluxb? Broad component flux; 1e-16 erg/s/cm^2^1e-19W.m**-2phot.fluxfloatnullablee_Fluxb? Uncertainty in Fluxb1e-19W.m**-2stat.errorfloatnullableFWHMb? Broad component Full-Width at Half-Maximumkm/sspect.line.widthfloatnullablee_FWHMb? Uncertainty in FWHMbkm/sstat.errorfloatnullable