J/AJ/160/38ivo://CDS.VizieR/J/AJ/160/38doi:10.26093/cds/vizier.51600038CDSVos J.M.Biller B.A.Allers K.N.Faherty J.K.Liu M.C.Metchev S.,Eriksson S.Manjavacas E.Dupuy T.J.Janson M.Radigan-Hoffman J.,Crossfield I.Bonnefoy M.Best W.M.J.Homeier D.Schlieder J.E.,Brandner W.Henning T.Bonavita M.Buenzli E.2022-07-04T07:43:10Z2020-11-02T13:56:25ZCDS support team

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

cds-question@unistra.frbrown-dwarfsinfrared-photometrystellar-spectral-typesstellar-agesstellar-radiiWe present Spitzer Space Telescope variability monitoring observations of three low-gravity L dwarfs with previous detections of variability in the near-IR: 2MASSJ0045+16, 2MASSJ0501-00, and 2MASSJ1425-36. We detect significant periodic variability in two of our targets, 2MASS J0045+16 and 2MASS J0501-00. We do not detect variability in 2MASS J1425-36. Combining our new rotation periods with rotational velocities, we calculate inclination angles of 22{deg}{+/-}1{deg}, 60_-8_^+13^{deg}, and 52_-13_^+19^{deg} for 2MASSJ0045+16, 2MASSJ0501-00, and 2MASSJ1425-36, respectively. Our three new objects are consistent with the tentative relations between inclination, amplitude, and color anomaly previously reported. Objects with the highest variability amplitudes are inclined equator on, while the maximum observed amplitude decreases as the inclination angle decreases. We also find a correlation between the inclination angle and (J-K)_2MASS_ color anomaly for the sample of objects with measured inclinations. Compiling the entire sample of brown dwarfs with Spitzer variability detections, we find no enhancement in amplitude for young, early-L dwarfs compared to the field dwarf population. We find a possible enhancement in amplitude of low-gravity late-L dwarfs at 4.5{mu}m. We do not find a correlation between amplitude ratio and spectral type for field dwarfs or for the young population. Finally, we compile the rotation periods of a large sample of brown dwarfs with ages 1Myr-1Gyr and compare the rotation rates predicted by evolutionary models assuming angular momentum conservation. We find that the rotation rates of the current sample of brown dwarfs fall within the expected range set by evolutionary models and breakup limits.2020AJ....160...38Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/160/38CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/419/249 : RJHKs photometry of sigma Ori low-mass stars (Scholz+, 2004)J/A+A/429/1007 : RIJHK photometry of VLM objects near eps Ori (Scholz+, 2005)J/A+A/491/889 : CoRoT-Exo-3b observations (Deleuil+, 2008)J/A+A/502/883 : I photom. of very low mass ONC stars (Rodriguez-Ledesma+,2009)J/ApJ/723/684 : NIRSPEC ultracool dwarf radial velocity survey (Blake+, 2010)J/A+A/519/A98 : Transit of exoplanet WASP-21b (Bouchy+, 2010)J/ApJS/191/389 : Photometric monitoring in {sigma} Ori cluster (Cody+, 2010)J/ApJS/201/19 : Hawaii Infrared Parallax Program. I. (Dupuy+, 2012)J/ApJ/761/123 : KELT-1 photometry and spectroscopy follow-up (Siverd+, 2012)J/ApJ/810/158 : M,L,T dwarfs fundamental parameters & SEDs (Filippazzo+, 2015)J/ApJS/219/33 : BANYAN. VII. Candidate YMG members from BASS (Gagne+, 2015)J/ApJ/832/58 : Spitzer/IRAC monitoring WISEJ085510.83-071442.5 (Esplin+,2016)J/ApJS/225/10 : Kinematic analysis of M7-L8 dwarfs (Faherty+, 2016)J/ApJ/833/96 : Hawaii infrared plx program. II. Ultracool dwarfs (Liu+, 2016)J/ApJ/818/176 : HST/WFC3 NIR photometry of 2M1207b (Zhou+, 2016)J/AJ/154/129 : PSYM-WIDE: planetary-mass comp. to YMG members (Naud+, 2017)J/AJ/153/95 : Catalog of Suspected Nearby Young Stars (Riedel+, 2017)J/A+A/629/A145 : L9-T3.5 brown dwarfs light curves (Eriksson+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/160/38https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/160/38http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/160/38https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/160/38https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/160/38http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/160/38GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/160/38/table3 (Brown dwarf variability detections and upper limits in the infrared)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/160/38/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/160/38/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/160/38/table3?GETtext/xml+votable180.050000true9.067132818.35285750.0055555555555555566/223 3764 4719 5065 5211 5560 5659 6261 6597 8223 8719 9063 9173 9479 9776 10114 11435 12592 12638 13122 13425 13455 13885 17630 18032 18281 18300 18683 18866 19144 19423 19763 19783 19813 19857 20141 21296 22600 22759 22937 24580 25055 25170 25314 25335 25443 26210 26555 27074 27201 27514 27692 28530 29987 31062 31502 31871 32284 32337 32426 32652 35572 37502 38176 38363 39482 40397 41984 43475 44807 46334 47640 48759 48907https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/160/38?format=asciiInfrareddefaultJ/AJ/160/38/table3Brown dwarf variability detections and upper limits in the infraredSimbadNameSimbad column added by the CDSmeta.idcharnullableInc[23/90]? Inclinationdegsrc.orbital.inclinationintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDTarget identifiermeta.id;meta.maincharSpTSpectral typesrc.spTypecharAJ[0.6/26]? Ground based J band amplitude%src.var.amplitudefloatnullablee_AJ[0.04/2.4]? Uncertainty in AJ%stat.errorfloatnullablel_AWFC3[>] Limit flag on AWFC3meta.code.errorcharAWFC3[0.7/27]? WFC3 NIR amplitude%src.var.amplitudefloatnullablee_AWFC3[0/0.3]? Uncertainty in AWFC3%stat.errorfloatnullablef_AWFC3[t] Indicates a tentative AWFC3 valuemeta.codecharA3.6[0.1/11]? Spitzer/IRAC 3.6micron band amplitude%src.var.amplitudefloatnullablee_A3.6[0/1]? Uncertainty in A3.6%stat.errorfloatnullableA4.5[-0.45/10]? Spitzer/IRAC 4.5micron band amplitude%src.var.amplitudefloatnullablee_A4.5[0/1.0]? Uncertainty in A4.5%stat.errorfloatnullablePer[1.41/24]? Periodhtime.periodfloatnullablee_Per[0.01/5]? Uncertainty in Phstat.errorfloatnullableAge[7/1000]? AgeMyrtime.ageintnullablee_Age[2.5/200]? Uncertainty in AgeMyrstat.error;time.agefloatnullableRad[0.94/1.62]? Radius (1)(7.1492x10+7m)phys.size.radiusfloatnullablee_Rad[0.01/0.2]? Uncertainty in R(7.1492x10+7m)stat.errorfloatnullableComp[0/1] Is this a companion, 1=yes, 0=nometa.codeintE_Inc[0/19]? Upper uncertainty in Incdegstat.error;stat.maxintnullablee_Inc[1/29]? Lower uncertainty in Incdegstat.errorintnullableRefVariability reference(s) (2)meta.ref;src.var_RAPosition from SIMBAD (right ascension part)degpos.eq.ra;meta.mainnullable_DEPosition from SIMBAD (declination part)degpos.eq.dec;meta.mainnullable