J/AJ/150/190ivo://CDS.VizieR/J/AJ/150/190doi:10.26093/cds/vizier.51500190CDSCorliss D.J.Morrison N.D.Adelman S.J.2017-06-30T05:47:56Z2016-04-27T14:05:08ZCDS support team

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

cds-question@unistra.frsupergiant-starsspectroscopyvisible-astronomymedium-band-photometryradial-velocityline-intensitiesA time-series analysis of spectroscopic and photometric observables of the A0 Ia supergiant HR 1040 has been performed, including equivalent widths, radial velocities, and Stromgren photometric indices. The data, obtained from 1993 through 2007, include 152 spectroscopic observations from the Ritter Observatory 1m telescope and 269 Stromgren photometric observations from the Four College Automated Photoelectric Telescope. Typical of late B- and early A-type supergiants, HR 1040 has a highly variable H{alpha} profile. The star was found to have an intermittent active phase marked by correlation between the H{alpha} absorption equivalent width and blue-edge radial velocity and by photospheric connections observed in correlations to equivalent width, second moment and radial velocity in SiII{lambda}{lambda}6347,6371. High-velocity absorption (HVA) events were observed only during this active phase. HVA events in the wind were preceded by photospheric activity, including SiII radial velocity oscillations 19-42 days prior to onset of an HVA event and correlated increases in SiII W_{lambda}_ and second moment from 13 to 23 days before the start of the HVA event. While increases in various line equivalent widths in the wind prior to HVA events have been reported in the past in other stars, our finding of precursors in enhanced radial velocity variations in the wind and at the photosphere is a new result.2015AJ....150..190Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/150/190CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/AJ/141/17 : 5-year spectroscopy and photometry of Deneb (Richardson+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/150/190https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/150/190http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/150/190https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/150/190https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/150/190http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/150/190GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/150/190/table10Differential Stromgren magnitudesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Datedtime.epochdoubleumag[0.4/0.9] Differential Stromgren u band magnitudemagphot.mag;em.opt.Ufloatvmag[0.6/1.1] Differential Stromgren v band magnitudemagphot.mag;em.opt.Bfloatbmag[0.4/0.7] Differential Stromgren b band magnitudemagphot.mag;em.opt.Bfloatymag[0.09/0.3] Differential Stromgren y band magnitudemagphot.mag;em.opt.VfloatJ/AJ/150/190/table9Spectroscopic results and observation logrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian date at mid-exposuredtime.epochdoubleEWabs[0.088/1.34] H{alpha} absorption equivalent width (in {AA}) (1)0.1nmspect.line.eqWidth;em.line.HalphafloatEWLem[0.008/0.16] H{alpha} left (blue) emission equivalent width (in {AA}) (1)0.1nmspect.line.eqWidth;em.line.HalphafloatEWRem[0.007/0.17] H{alpha} right (red) emission equivalent width (in {AA}) (1)0.1nmspect.line.eqWidth;em.line.HalphafloatHRVb[12.5/201] H{alpha} blue edge radial velocity v_BE_ absolute value (all values are negative) (2)km/sphys.veloc;pos.heliocentricfloatHRVr[-15/88.6] H{alpha} red edge radial velocity v_RE_ (2)km/sphys.veloc;pos.heliocentricfloatEW6578[0.025/0.11] C II {lambda}6578 equivalent width (in {AA}) (1)0.1nmspect.line.eqWidthfloatEW6583[0.015/0.07] C II {lambda}6583 equivalent width (in {AA}) (1)0.1nmspect.line.eqWidthfloatEW6546[0.04/0.2] Mg II {lambda}6546 equivalent width (in {AA}) (1)0.1nmspect.line.eqWidthfloatEW6347[0/2.7] Si II {lambda}6347 equivalent width (in {AA}) (1)0.1nmspect.line.eqWidthfloatEW6371[0/3.55] Si II {lambda}6371 equivalent width (in {AA}) (1)0.1nmspect.line.eqWidthfloatHRV6347[-9.2/14.9] Si II {lambda}6347 radial velocity (3)km/sphys.veloc;pos.heliocentricfloatHRV6371[-8.6/13] Si II {lambda}6371 radial velocity (3)km/sphys.veloc;pos.heliocentricfloatM26347[0.022/2.72] Si II {lambda}6347 second moment (in {AA}^2^) (4)0.1nm**2spect.line.widthfloatExp[900/3600] Exposure timestime.duration;obs.exposureintS/N[20/161] Signal-to-noise ratio per pixelstat.snr;instr.pixelintObsInitals of observer(s) (5)obs.observerchar