J/ApJ/903/99ivo://CDS.VizieR/J/ApJ/903/99doi:10.26093/cds/vizier.19030099CDSHealy B.F.McCullough P.R.2022-09-30T23:05:24Z2022-02-21T06:20:10ZCDS support team

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

cds-question@unistra.fropen-star-clustersvisible-astronomyradial-velocitystellar-radiieffective-temperatureMeasuring the distribution of stellar spin axis orientations in a coeval group of stars probes the physical processes underlying the stars' formation. In this paper, we use spectrophotometric observations of the open cluster NGC2516 to determine the degree of spin alignment among its stars. We combine TESS light curves, ground-based spectroscopy from the Gaia-ESO and GALAH surveys, broadband stellar magnitudes from several surveys, and Gaia astrometry to measure 33 stellar inclinations and quantify overall cluster rotation. Our measurements suggest that stellar spins in this cluster are isotropically oriented, while allowing for the possibility that they are moderately aligned. An isotropic distribution of NGC2516 spins would imply a star-forming environment in which turbulence dominated ordered motion, while a moderately aligned distribution would suggest a more substantial contribution from rotation. We also perform a three-dimensional analysis of the cluster's internal kinematics, finding no significant signatures of overall rotation. Stemming from this analysis, we identify evidence of cluster contraction, suggesting possible ongoing mass segregation in NGC2516.2020ApJ...903...99Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/903/99CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/simbad : Simbad objects catalogue (M.Wenger 2000)I/259 : The Tycho-2 Catalogue (Hog+ 2000)II/328 : AllWISE Data Release (Cutri+ 2013)I/337 : Gaia DR1 (Gaia Collaboration, 2016)I/345 : Gaia DR2 (Gaia Collaboration, 2018)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/A+A/360/472 : Proper motions in omega Centauri (van Leeuwen+, 2000)J/A+A/375/863 : Photometry in NGC 2516 (Jeffries+, 2001)J/AJ/123/290 : UBVI CCD photometry of NGC 2516 (Sung+, 2002)J/A+A/398/647 : Rotational velocities of F and G stars (Reiners+, 2003)J/MNRAS/402/1380 : Rotation velocities Pleiades & {alpha}Per (Jackson+, 2010)J/MNRAS/432/1203 : Rotation periods of M-dwarf stars (McQuillan+, 2013)J/A+A/557/L10 : Rotation periods of 12000 Kepler stars (Nielsen+, 2013)J/ApJ/776/67 : Rotational tracks (van Saders+, 2013)J/ApJS/211/24 : Rotation periods of Kepler MS stars (McQuillan+, 2014)J/AJ/150/97 : Radial velocities M67. I. 1278 candid. members (Geller+, 2015)J/A+A/580/A75 : Velocity precision in the Gaia-ESO Survey (Jackson+, 2015)J/A+A/586/A52 : NGC 2264, NGC 2547 and NGC 2516 stellar radii (Jackson+, 2016)J/AJ/153/136 : Planets & their host stars with Gaia plxs (Stassun+, 2017)J/MNRAS/478/4513 : GALAH Survey DR2 (Buder+, 2018)J/A+A/618/A93 : Gaia DR2 open clusters in the Milky Way (Cantat-Gaudin+, 2018)J/A+A/616/A12 : Gaia DR2 sources in GC and dSph (Gaia Collaboration+, 2018)J/A+A/612/L2 : Compilation of stellar rotation data (Kovacs, 2018)J/A+A/618/A109 : Seismic global parameters of 372 KIC (Mosser+, 2018)J/AJ/156/102 : TESS Input Catalog and Candidate Target List (Stassun+, 2018)J/A+A/623/A108 : Age of 269 GDR2 open clusters (Bossini+, 2019)J/ApJS/245/13 : CDIPS. I. LCs from TESS sectors 6 and 7 (Bouma+, 2019)J/MNRAS/490/3806 : Exoplanets & variable stars 47 Tuc field (Nardiello+, 2019)J/MNRAS/495/4924 : Exoplanets in Southern open clusters (Nardiello+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/903/99https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/903/99http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/903/99https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/903/99https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/903/99http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/903/99GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/903/99/table1 (Rotation periods of stars with >68% confidence in NGC2516 membership)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/903/99/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/903/99/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/903/99/table1?GETtext/xml+votable180.050000true120.92347226164134-60.907506231167920.005555555555555556Cone search capability for table J/ApJ/903/99/table2 (Inclinations and intermediate measurements for 33 NGC2516 stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/903/99/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/903/99/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/903/99/table2?GETtext/xml+votable180.050000true118.96424957852149-60.9670225989847050.0055555555555555565/9398 6/37586-37587https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/903/99?format=asciiOpticaldefaultJ/ApJ/903/99/table1Rotation periods of stars with >68% confidence in NGC2516 membershiprecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaGaia DR2 source IDmeta.id;meta.mainprimaryRAICRS[117/122] Right Ascension (ICRS 2015.5)degpos.eq.ra;meta.mainDEICRS[-62/-59] Declination (ICRS 2015.5)degpos.eq.dec;meta.mainPmemb[0.7/1] Membership likelihood (<1)stat.fit.goodnessfloatBP-RP[-0.008/2.41] Gaia GBP-GRP colormagphot.color;em.opt.B;em.opt.Rfloate_BP-RP[0.001/0.02] Uncertainty in BP-RPmagstat.errorfloatPer[0.22/7.3] Perioddtime.periodfloate_Per[0.008/0.7] Uncertainty in Perdstat.errorfloatMeasIndicates the existence of inclination and intermediate measurements (table2)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJ/903/99/table2Inclinations and intermediate measurements for 33 NGC2516 starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaGaia DR2 source IDmeta.id;meta.mainRAICRS[118/121] Right Ascension (ICRS 2015.5)degpos.eq.ra;meta.mainDEICRS[-62/-60] Declination (ICRS 2015.5)degpos.eq.dec;meta.mainPmemb[0.7/1] Membership likelihood (<1)stat.fit.goodnessfloatRVel[20.9/26.6] Radial Velocitykm/sphys.veloc;pos.heliocentricfloate_RVel[0.1/4] Uncertainty in RVelkm/sstat.error;spect.dopplerVelocfloatTeff[4080/6490] Effective temperatureKphys.temperature.effectiveinte_Teff[99/210] Uncertainty in TeffKstat.error;phys.temperature.effectiveintRad[0.58/1.38] Radius, solar unitssolRadmeta.unit;phys.size.radiusfloate_Rad[0.01/0.03] Uncertainty in RadiussolRadstat.errorfloatvsini[5.1/75] Rotational velocity v*sin(i)km/sphys.veloc.rotatfloate_vsini[0.34/9] Uncertainty in vsinikm/sstat.error;phys.veloc.rotatfloatPer[0.22/4.26] Perioddtime.periodfloate_Per[0.008/0.3] Uncertainty in Perdstat.errorfloatsini[0.38/1.14] Sin of the inclination on the skysrc.orbital.inclinationfloatE_sini[0.03/0.2] Upper uncertainty on sini (84th percentile)stat.error;stat.maxfloate_sini[0.02/0.2] Lower uncertainty on sini (16th percentile)stat.errorfloatr_RVelRadial Velocity reference: Gaia-ESO, Gilmore+, 2012Msngr.147...25Gmeta.ref;pos.framechar