J/ApJ/745/56ivo://CDS.VizieR/J/ApJ/745/56doi:10.26093/cds/vizier.17450056CDSDahm S.E.Slesnick C.L.White R.J.2017-12-15T10:54:48Z2013-08-08T08:23:38ZCDS support team

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

cds-question@unistra.frradial-velocityinfrared-photometryline-intensitiesearly-type-starslate-type-starsWe present projected rotational velocities for 20 early-type (B8-A9) and 74 late-type (F2-M8) members of the ~5 Myr old Upper Scorpius OB Association derived from high-dispersion optical spectra obtained with the High Resolution Echelle Spectrometer on Keck I and the Magellan Inamori Kyocera Echelle on the Magellan Clay telescope. The spectroscopic sample is composed of stars and brown dwarfs with infrared signatures of circumstellar disks, both primordial and debris, and non-excess sources of comparable spectral type. We merge projected rotational velocities, accretion diagnostics, and Spitzer Space Telescope Infrared Array Camera and Multiband Imaging Photometer for Spitzer 24 {mu}m photometry to examine the relationship between rotation and circumstellar disks. The rotational velocities are strongly correlated with spectral type, a proxy for mass, such that the median vsin i for B8-A9-type stars is: 195+/-70km/s, F2-K4: 37.8+/-7.4km/s, K5-K9: 13.8^+21.3^_-8.2_km/s, M0-M5: 16.52+/-5.3km/s, and M5.5-M8: 17.72+/-8.1km/s. We find with a probability of >=0.99 that M-type stars and brown dwarfs having infrared excess suggestive of circumstellar disks rotate more slowly than their non-excess counterparts. A similar correlation is present among F2-K9-type stars, but only at the ~97% confidence level. Among the early-type (B8-A9) members, rotational velocities of the debris-disk and non-disk populations are indistinguishable. Considering the late-type (F2-M8) stars and brown dwarfs, we find a low fraction of slowly rotating, non-excess sources relative to younger star-forming regions, suggesting that most have spun up following disk dissipation. The few late-type (F2-M5) debris disk sources, which may be representative of stars that have recently dispersed their inner disks, are evenly divided between slow and moderate rotators.2012ApJ...745...56Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/745/56CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/431/3222 : UKIDSS GCS Upper Sco members (Lodieu, 2013)J/A+A/527/A24 : Spectra of low-mass stars in Upper Sco (Lodieu+, 2011)J/MNRAS/418/1231 : New brown dwarfs in upper Sco (Dawson+, 2011)J/AJ/139/1338 : UV-selected stars in Tau and Upper Sco (Findeisen+, 2010)J/ApJ/705/1646 : Debris disks in Upper Sco (Carpenter+, 2009)J/ApJ/688/377 : Low-mass objects in Upper Scorpius. II. (Slesnick+, 2008)J/ApJ/651/L49 : Upper Sco OB association IRAC observations (Carpenter+, 2006)J/AJ/131/3016 : Low-mass objects in Upper Scorpius (Slesnick+, 2006)J/MNRAS/373/95 : ZYJHK survey of Upper Sco association (Lodieu+, 2006)J/AJ/121/1040 : PMS members of upper Sco OB association (Preibisch+, 2001)J/AJ/120/479 : Low-mass stars in the Upper Sco association (Ardila+, 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/745/56https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/745/56http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/745/56https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/745/56https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/745/56http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/745/56GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/745/56/table1 (Properties of the Upper Scorpius spectroscopic sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/745/56/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/745/56/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/745/56/table1?GETtext/xml+votable180.050000true239.5473694-14.27935810.0055555555555555565/10747 11088 11090 6/29320 42858 42896 42911 42940 42955 42981 42985 42992 42994 43002 44308 44311 44312 44316 44317 44319 44321 44358 44365 44366 44367 44368 44371 44372 44378 44379 44388 44389 44397 44400 44401 44402 44421 445026.772611666688002e-21 4.923046907857898e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/745/56?format=asciiOpticalInfrareddefaultJ/ApJ/745/56/table1Properties of the Upper Scorpius spectroscopic sampleSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource namemeta.id;meta.maincharSpTMK spectral typesrc.spTypecharHRV[-50.92/14.6]? Heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloatnullablee_HRV[0.1/7.1]? HRV uncertaintykm/sstat.errorfloatnullablef_HRV[i] double-lined spectroscopic binary (1)meta.codechar[4.5][1.9/4020]? Spitzer/IRAC 4.5um flux density (2)mJyphot.mag;em.IR.4-8umfloatnullable[8.0][0.8/2269]? Spitzer/IRAC 8um flux density (2)mJyphot.flux.density;em.IR.8-15umfloatnullablel_[24]Limit flag on [24]meta.code.errorchar[24][0.2/1170]? Spitzer/MIPS 24um flux density (2)mJyphot.flux.density;em.IR.15-30umfloatnullablel_vsini[<= ] Limit flag on vsinimeta.code.error;phys.veloc.rotatcharvsini[4.48/400]? Projected rotational velocitykm/sphys.veloc.rotatfloatnullablee_vsini[0.13/26]? vsini uncertaintykm/sstat.error;phys.veloc.rotatfloatnullablef_vsini[g] rotational velocity of primary (1)meta.codecharW(Ha)[-219.51/-0.1]? H{alpha} equivalent width (negative values imply emission)0.1nmspect.line.eqWidth;em.line.HalphafloatnullableHa10[88.46/616.5]? Velocity width of H{alpha} emission profiles at 10% of peak fluxkm/sspect.dopplerVeloc;em.line.HalphafloatnullableDiskDisk status (Debris, Non-excess or Primordial)meta.notecharEpochUT Date of observation (YYYYMMDD) with prefix: H=HIRES, M=MIKEtime.epochcharCommCommentsmeta.notecharK07[h] h=Binary identified by Kouwenhoven et al. (2007A&A...474...77K)meta.codecharUScoCross-match with Carpenter et al. 2006 (J/ApJ/651/L49) and 2009 (J/ApJ/705/1646)meta.ref.urlintnullable_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.main