J/AJ/144/64ivo://CDS.VizieR/J/AJ/144/64doi:10.26093/cds/vizier.51440064CDSDieterich S.B.Henry T.J.Golimowski D.A.Krist J.E.Tanner A.M.2024-10-11T20:09:34Z2013-10-30T07:45:53ZCDS support team

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

cds-question@unistra.frmultiple-starsdwarf-starsm-starsinfrared-photometryWe report on our analysis of Hubble Space Telescope/NICMOS snapshot high-resolution images of 255 stars in 201 systems within ~10 pc of the Sun. Photometry was obtained through filters F110W, F180M, F207M, and F222M using NICMOS Camera 2. These filters were selected to permit clear identification of cool brown dwarfs through methane contrast imaging. With a plate scale of 76mas/pixel, NICMOS can easily resolve binaries with subarcsecond separations in the 19.5"x19".5 field of view. We previously reported five companions to nearby M and L dwarfs from this search. No new companions were discovered during the second phase of data analysis presented here, confirming that stellar/substellar binaries are rare. We establish magnitude and separation limits for which companions can be ruled out for each star in the sample, and then perform a comprehensive sensitivity and completeness analysis for the subsample of 138 M dwarfs in 126 systems. We calculate a multiplicity fraction of 0.0^+3.5^_-0.0_% for L companions to M dwarfs in the separation range of 5-70 AU, and 2.3^+5.0^_-0.7_% for L and T companions to M dwarfs in the separation range of 10-70AU. We also discuss trends in the color-magnitude diagrams using various color combinations and present astrometry for 19 multiple systems in our sample. Considering these results and results from several other studies, we argue that the so-called brown dwarf desert extends to binary systems with low-mass primaries and is largely independent of primary mass, mass ratio, and separations. While focusing on companion properties, we discuss how the qualitative agreement between observed companion mass functions and initial mass functions suggests that the paucity of brown dwarfs in either population may be due to a common cause and not due to binary formation mechanisms.2012AJ....144...64Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/144/64CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/130 : Geneva-Copenhagen Survey of Solar neighbourhood III (Holmberg+, 2009)V/70 : Nearby Stars, Preliminary 3rd Version (Gliese+ 1991)J/ApJ/736/89 : Companions around nearby massive stars (Janson+, 2011)J/AJ/142/92 : New proper motion stars with pm>=0.18"/yr (Boyd+, 2011)J/AJ/142/10 : New proper motion stars 0.40"/yr>pm>=0.18"/yr (Boyd+, 2011)J/AJ/141/21 : CCD distance estimates of SCR targets (Winters+, 2011)J/AJ/133/971 : Companions of low-mass stars and brown dwarfs (Allen+, 2007)J/AJ/133/439 : Luminosity function of M7-L8 ultracool dwarfs (Cruz+, 2007)J/AJ/134/252 : New nearby white dwarf systems (Subasavage+, 2007)J/AJ/133/2898 : New proper-motion stars (-90<DE< -47) (Finch+, 2007)J/ApJ/640/1051 : 25pc sample of Sun-like stars (Grether+, 2006)J/AJ/132/866 : New M dwarfs in solar neighborhood (Riaz+, 2006)J/MNRAS/360/1345 : F- and G-type stars in solar neighbourhood (Karatas+, 2005)J/AJ/129/413 : New high proper motion stars (-90<DE< -47) (Subasavage+, 2005)J/ApJS/161/394 : Low-luminosity companions to white dwarfs (Farihi+, 2005)J/AJ/130/1658 : New high proper motion stars (-47<{delta}< -00)J/AJ/125/3302 : HST binary very low mass stars and brown dwarfs (Gizis+, 2003)J/A+A/327/1039 : Structure and evolution of low-mass stars (Chabrier+ 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/144/64https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/144/64http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/144/64https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/144/64https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/144/64http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/144/64GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/144/64/table2 (Sensitivity to companions: faintest detectable absolute magnitudes for putative companions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/144/64/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/144/64/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/144/64/table2?GETtext/xml+votable180.050000true0.5448583-43.16556110.0055555555555555566/22 137 527 546 684 2737 2923 3020 3345 3639 3791 4444 4462 4693 4867 5000 5333 5420 5534 5590 5853 6552 6894 6974 7103 7264 8023 8123 8562 8790 8972 9339 9585 9629 9696 10027 10037 10149 10448 10899 11496 11636 11645 11862 12454 12679 13301 13451 13688 13743 14266 14278 14515 14772 14906 15311 15346 15548 15602 15960 16041 16069 16105 16391 16697 16758 16827 17028 17058 17348 17425 17534 18139 18268 18440 18496 18556 18666 18761 19064 19466 20071 20100 20459 20896 20940 21060 21151 21296 21479 21925 21953 22040 22300 22638 22708-22709 23230 23369 23564 23718 23735 23910 23997 24151 24227 24713 24924 26279 26327 26386 26538 26555 26699 26972 27392 27459 27462 28343 28605 28646 28664 28816 29196 29458 29684 30505 30543 30771 30833 30965 31019 31087 31191 31751 31781 32093 32115 32229 32335 32491 33281 33384 33425 33579 33964 34181 34446 34448 34817 34896 35490 35499 35670 36511 36526 36614 36697 37257 37332 37379 37473 37654 37890 38152 38238 38456 38461 39499 40070 40250 40623 41591 41763 42225 42285 42290 42314 42459 42652 42784 43187 43580 43723 44921 44937 45322 45334 45485 45564 45669 46566 46632 46718 46939 47414 47589 48652 489851.0821199867009268e-19 1.1250370393078119e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/144/64?format=asciiInfrareddefaultJ/AJ/144/64/table2Sensitivity to companions: faintest detectable absolute magnitudes for putative companionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource namemeta.id;meta.maincharResResolved system point-spread function (PSF) detected in field of view (1)meta.notecharSpTSpectral typesrc.spTypecharDistHeliocentric distancepcpos.distancefloatDateDate of the observationtime.epochnullableF180? HST/NICMOS F180M band magnitudemagphot.mag;em.UV.100-200nmfloatnullableM0.2? Companion magnitude limit at 0.2" (absolute F180M band magnitude)maginstr.sensitivityfloatnullableM0.4? Companion magnitude limit at 0.4" (absolute F180M band magnitude)maginstr.sensitivityfloatnullableM0.6? Companion magnitude limit at 0.6" (absolute F180M band magnitude)maginstr.sensitivityfloatnullableM0.8? Companion magnitude limit at 0.8" (absolute F180M band magnitude)maginstr.sensitivityfloatnullableM1.0Companion magnitude limit at 1.0" (absolute F180M band magnitude)maginstr.sensitivityfloatM2.0Companion magnitude limit at 2.0" (absolute F180M band magnitude)maginstr.sensitivityfloatM3.0? Companion magnitude limit at 3.0" (absolute F180M band magnitude)maginstr.sensitivityfloatnullableM4.0? Companion magnitude limit at 4.0" (absolute F180M band magnitude)maginstr.sensitivityfloatnullableNoteAdditional note(s) (2)meta.notecharSimbadNameSimbad column added by the CDSmeta.idchar_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.main