J/A+A/515/A75 Low-mass population in ρ Oph cloud (Alves de Oliveira+, 2010)
The low-mass population of the rho Ophiuchi molecular cloud.
Alves de Oliveira C., Moraux E., Bouvier J., Bouy H., Marmo C., Albert L.
<Astron. Astrophys. 515, A75 (2010)>
=2010A&A...515A..75A 2010A&A...515A..75A
ADC_Keywords: Molecular clouds ; YSOs ; Photometry, infrared ;
Photometry, millimetric/submm
Keywords: stars: formation - stars: low-mass - brown-dwarf - planetary system
Abstract:
Star formation theories are currently divergent regarding the
fundamental physical processes that dominate the substellar regime.
Observations of nearby young open clusters allow the brown dwarf (BD)
population to be characterised down to the planetary mass regime,
which ultimately must be accommodated by a successful theory.
We used near-IR deep images (reaching completeness limits of
approximately 20.5mag in J, and 18.9mag in H and Ks taken with the
Wide Field IR Camera (WIRCam) at the Canada France Hawaii Telescope
(CFHT) to identify candidate members of ρ Oph in the substellar
regime. A spectroscopic follow-up of a small sample of the candidates
allows us to assess their spectral type, and subsequently their
temperature and membership.
We select 110 candidate members of the ρ Ophiuchi molecular cloud,
from which 80 have not previously been associated with the cloud. We
observed a small sample of these and spectroscopically confirm six new
brown dwarfs with spectral types ranging from M6.5 to M8.25.
Description:
List of the substellar candidate members in ρ Ophiuchi identified
with our near-IR survey. If available, the following information is
also provided, optical and/or mid-IR photometry, spectral type and Av
as determined from this study, photometric properties such as
detection of IR excess, and references for the sources previously
associated with the cluster in the literature.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 210 110 List of substellar candidate members in ρ Oph
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See also:
J/ApJ/438/813 : Stellar population in ρ Oph cloud core (Strom+, 1995)
J/ApJS/112/109 : Rho Oph Near-IR Positions and Photometry (Barsony+, 1997)
J/A+A/359/113 : X-ray and IR study of Rho Oph dark cloud (Grosso+, 2000)
J/A+A/372/173 : ISOCAM observations of rho Ophiuchi cloud (Bontemps+, 2001)
J/PASJ/55/653 : Chandra X-ray flares in rho Ophiuchi (Imanishi+, 2003)
J/A+A/426/171 : H2 flows in rho Ophiuchi A (Khanzadyan+, 2004)
J/ApJ/613/393 : X-ray and radio sources in ρ Oph Core A (Gagne+, 2004)
J/AJ/130/1733 : Optical spectroscopy of ρ Oph stars (Wilking+, 2005)
J/ApJ/630/381 : Mid-IR imaging in ρ Oph (Barsony+, 2005)
J/A+A/429/963 : XMM-Newton observation of the rho Oph cloud (Ozawa+, 2005)
J/A+A/430/549 : C18O/C17O near rho Oph (Wouterloot+, 2005)
J/A+A/447/609 : 1.2mm continuum observations in rho Oph cloud (Stanke+, 2006)
J/A+A/452/245 : Near-IR photometry of PMS stars in rho Oph (Natta+, 2006)
J/A+A/485/155 : HK photometry of rho Oph PMS stars (Alves de Oliveira+, 2008)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- --- [CFHTWIR-Oph]
13- 15 I3 --- Seq [1/110] Substellar candidate name,
CFHTWIR-Oph NNN
17- 18 I2 h RAh Right Ascension (J2000)
20- 21 I2 min RAm Right Ascension (J2000)
23- 27 F5.2 s RAs Right Ascension (J2000)
29 A1 - DE- Declination sign (J2000)
30- 31 I2 deg DEd Declination (J2000)
33- 34 I2 arcmin DEm Declination (J2000)
36- 39 F4.1 arcsec DEs Declination (J2000)
41- 45 F5.2 mag i'mag ? Aperture photometry i' from PrimeCam/Subaru
47- 50 F4.2 mag e_i'mag ? i'mag photometric error
52- 56 F5.2 mag z'mag ? Aperture photometry z' from PrimeCam/Subaru
58- 61 F4.2 mag e_z'mag ? z'mag photometric error
63- 67 F5.2 mag Jmag ? PSF photometry J magnitude from WIRCam/CFHT
69- 72 F4.2 mag e_Jmag ? Jmag photometric error
74- 78 F5.2 mag Hmag ? PSF photometry H magnitude from WIRCam/CFHT
80- 83 F4.2 mag e_Hmag ? Hmag photometric error
85- 89 F5.2 mag Ksmag ? PSF photometry Ks magnitude from WIRCam/CFHT
91- 94 F4.2 mag e_Ksmag ? Ksmag photometric error
96-100 F5.2 mag [3.6] ? IRAC 3.6um magnitude as retrieved from the
NASA/IPAC Infrared Science Archive
102-105 F4.2 mag e_[3.6] ? [3.6] photometric error
107-111 F5.2 mag [4.5] ? IRAC 4.5um magnitude as retrieved from the
NASA/IPAC Infrared Science Archive
113-116 F4.2 mag e_[4.5] ? [4.5] photometric error
118-122 F5.2 mag [5.4] ? IRAC 5.4um magnitude as retrieved from the
NASA/IPAC Infrared Science Archive
124-127 F4.2 mag e_[5.4] ? [5.4] photometric error
129-133 F5.2 mag [8.0] ? IRAC 8.0um magnitude as retrieved from the
NASA/IPAC Infrared Science Archive
135-138 F4.2 mag e_[8.0] ? [8.0] photometric error
140-144 F5.2 mag [24] ? MIPS 24um magnitude as retrieved from the
NASA/IPAC Infrared Science Archive
146-149 F4.2 mag e_[24] ? [24] photometric error
151-155 A5 --- SpT MK spectral type as determined in this study
157-160 F4.2 mag AV ? AV as determined in this study
162-170 A9 --- Ref References for ρ Ophiuchi members,
according to these studies (1)
172-186 A15 --- Flag Properties of the candidate members (2)
188-210 A23 --- OName Simbad Name
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Note (1): ρ Ophiuchi members, according to the following studies:
1 = Bontemps et al. (2001, Cat. J/A+A/372/173)
2 = Comeron et al. (1993ApJ...416..185C 1993ApJ...416..185C)
3 = Greene et al. (1992ApJ...395..516G 1992ApJ...395..516G)
4 = Gutermuth et al. (2009, Cat. J/ApJS/184/18)
5 = Strom et al. (1995, Cat. J/ApJ/438/813)
6 = Wilking et al. (1983ApJ...274..698W 1983ApJ...274..698W)
7 = Wilking et al. (1989ApJ...340..823W 1989ApJ...340..823W)
8 = Wilking et al. (2008hsf2.book..351W 2008hsf2.book..351W)
Note (2): Properties flags as follows:
ex1 = mid-IR excess
ex2 = mid-IR excess
var = Variability
AGN = Possible Active Galactic Nuclei Contaminant
R = red spectrum
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Acknowledgements:
Catarina Alves de Oliveira, Catarina.Oliveira(at)obs.ujf-grenoble.fr
(End) Patricia Vannier [CDS] 19-Apr-2010