J/ApJ/744/134 SONYC new brown dwarfs in ρ Oph (Muzic+, 2012)
Substellar Objects in Nearby Young Clusters (SONYC).
V. New brown dwarfs in ρ Ophiuchi.
Muzic K., Scholz A., Geers V., Jayawardhana R., Tamura M.
<Astrophys. J., 744, 134 (2012)>
=2012ApJ...744..134M 2012ApJ...744..134M
=2011ApJ...726...23G 2011ApJ...726...23G
ADC_Keywords: Photometry ; Spectra, infrared ; Spectral types ;
Stars, pre-main sequence ; YSOs ; Stars, late-type ;
Effective temperatures
Keywords: brown dwarfs - circumstellar matter - planetary systems -
stars: formation - stars: low-mass
Abstract:
SONYC - Substellar Objects in Nearby Young Clusters - is a survey
program to investigate the frequency and properties of substellar
objects with masses down to a few times that of Jupiter in nearby
star-forming regions.
In two papers of the SONYC series we have obtained follow-up
spectroscopy for a large number of candidate very low ma ss (VLM)
members of the ∼1Myr old cluster rho Ophiuchi. For more details on the
survey, see the associated paper (Muzic et al., 2012ApJ...744..134M 2012ApJ...744..134M).
Here we publish the two catalogues of photometric candidate members
from which the spectroscopic samples were extracted (see Geers et al.
2011ApJ...726...23G 2011ApJ...726...23G and Muzic et al. 2012ApJ...744..134M 2012ApJ...744..134M for more
details on these catalogues). We include a table containing all the
spectroscopically confirmed VLM members of the cluster observed within
the SONYC campaign. We also attach and a table with all the objects
that have been rejected as VLM members based on our spectroscopic
follow-up. The majority of these latter objects are expected to be
background contaminants, although some of them could also be embedded
cluster members with spectral types earlier than M.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
ijk_cand.dat 44 513 iJKs candidate catalogue (photometry only)
jks_cand.dat 65 83 JKs-Spitzer candidate catalog (photometry only)
members.dat 92 26 Spectroscopically confirmed very low mass members
of rho Ophiuchi from Papers II and V
excluded.dat 39 128 Objects ruled out by spectroscopy as very low
mass members of rho Ophiuchi from Papers II and V
(duplicates removed)
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See also:
II/289 : JKH photometry in LDN 1688 (Wilking+, 2008)
J/A+A/372/173 : ISOCAM observations of the rho Ophiuchi cloud (Bontemps+, 2001)
J/AJ/130/1733 : Optical spectroscopy of rho Oph stars (Wilking+, 2005)
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)
J/A+A/515/A75 : Low-mass population in rho Oph cloud (Alves de Oliveira+, 2010)
J/ApJ/719/550 : Deep NIR imaging of rho Oph cloud core (Marsh+, 2010)
J/AJ/142/140 : Optical spectroscopy of rho Oph stars. II. (Erickson+, 2011)
J/ApJ/744/6 : SONYC census of NGC1333 very low-mass objects (Scholz+, 2012)
Byte-by-byte Description of file: ijk_cand.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh Right ascension (J2000)
4- 5 I2 min RAm Right ascension (J2000)
7- 11 F5.2 s RAs Right ascension (J2000)
13 A1 --- DE- Declination sign (J2000.0)
14- 15 I2 deg DEd Declination (J2000.0)
17- 18 I2 arcmin DEm Declination (J2000.0)
20- 23 F4.1 arcsec DEs Declination (J2000.0)
25- 30 F6.3 mag i'mag SDSS i'-band magnitude (SDSS system)
32- 37 F6.3 mag Jmag 2MASS J-band magnitude (2MASS system) (G1)
39- 44 F6.3 mag Ksmag 2MASS Ks-band magnitude (2MASS system) (G1)
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Byte-by-byte Description of file: jks_cand.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh Right ascension (J2000)
4- 5 I2 min RAm Right ascension (J2000)
7- 11 F5.2 s RAs Right ascension (J2000)
13 A1 --- DE- Declination sign (J2000.0)
14- 15 I2 deg DEd Declination (J2000.0)
17- 18 I2 arcmin DEm Declination (J2000.0)
20- 23 F4.1 arcsec DEs Declination (J2000.0)
25- 30 F6.3 mag Jmag 2MASS J-band magnitude (2MASS system) (G1)
32- 37 F6.3 mag Ksmag 2MASS Ks-band magnitude (2MASS system) (G1)
39- 44 F6.3 mag [3.6] Spitzer/IRAC1 (3.6mu) magnitude (2)
46- 51 F6.3 mag [4.5] Spitzer/IRAC2 (4.5mu) magnitude (2)
53- 58 F6.3 mag [5.8] Spitzer/IRAC3 (5.8mu) magnitude (2)
60- 65 F6.3 mag [8.0] Spitzer/IRAC4 (8.0mu) magnitude (2)
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Note (2): Spitzer photometry derived from the 'HREL' catalog from the
Spitzer 'Cores to Disks' (C2D) legacy program (2009ApJS..181..321E 2009ApJS..181..321E)
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Byte-by-byte Description of file: members.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh Right ascension (J2000)
4- 5 I2 min RAm Right ascension (J2000)
7- 11 F5.2 s RAs Right ascension (J2000)
13 A1 --- DE- Declination sign (J2000.0)
14- 15 I2 deg DEd Declination (J2000.0)
17- 18 I2 arcmin DEm Declination (J2000.0)
20- 23 F4.1 arcsec DEs Declination (J2000.0)
25 A1 --- Inst [MFS] Instrument used for spectroscopy (G2)
27- 30 F4.1 mag AV1 Visual extinction from photometry (2)
32- 33 I2 mag AV2 Visual extinction from spectroscopy (3)
35 A1 --- l_Teff Limit flag (>) on effective temperature
36- 39 I4 K Teff Effective temperature (4)
42- 45 A4 --- SpT1 MK spectral type from SONYC (5)
47- 51 A5 --- SpT2 MK spectral type (6)
53- 56 A4 --- SpT3 MK spectral type (6)
60- 61 A2 --- SpT4 MK spectral type (6)
64- 92 A29 --- Names Object identifiers (7)
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Note (2): Calculated from the J- and K-band magnitudes.
Note (3): Corrected AV after spectral fitting.
Note (4): Estimated by comparing the spectra to models.
Note (5): Estimated using spectral indices.
Note (6): Spectral types from Wilking et al. (1999AJ....117..469W 1999AJ....117..469W),
Luhman & Rieke (1999ApJ...525..440L 1999ApJ...525..440L), Natta et al. (2002A&A...393..597N 2002A&A...393..597N),
Luhman et al. (1997ApJ...489...L165), Cushing et al. (2000AJ....119..3019C),
Wilking et al. (2005AJ...130...1733W), Alves de Oliveira et al.
(2010A&A...515A..75A 2010A&A...515A..75A), and Wilking et al. (2008hsf2.book..351W 2008hsf2.book..351W)
Note (7): Identifiers are from
Geers et al. (2011ApJ...726...23G 2011ApJ...726...23G; SONYC-RhoOph)
and Muzic et al. (2012ApJ...744...134M; SONYC-RhoOph),
Greene & Young (1992ApJ...395..516G 1992ApJ...395..516G; GY),
Alves de Oliveira et al. (2010A&A...515A..75A 2010A&A...515A..75A; CFHTWIR),
Comeron et al. (1993ApJ...416...185C; CRBR),
Bontemps et al. (2001A&A...372..173B 2001A&A...372..173B; ISO-Oph).
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Byte-by-byte Description of file: excluded.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh Right ascension (J2000)
4- 5 I2 min RAm Right ascension (J2000)
7- 11 F5.2 s RAs Right ascension (J2000)
13 A1 --- DE- Declination sign (J2000.0)
14- 15 I2 deg DEd Declination (J2000.0)
17- 18 I2 arcmin DEm Declination (J2000.0)
20- 23 F4.1 arcsec DEs Declination (J2000.0)
25- 30 F6.3 mag Jmag 2MASS J-band magnitude (2MASS system) (G1)
32- 37 F6.3 mag Ksmag 2MASS Ks-band magnitude (2MASS system) (G1)
39 A1 --- Inst [MFS] Instrument used for spectroscopy (G2)
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Global notes:
Note (G1): J- and K-band photometry from 2MASS (Cat. II/246) or
Geers et al. (2011ApJ...726...23G 2011ApJ...726...23G).
Note (G2): Instruments as follows:
M = MOIRCS/Subaru (from Geers et al. 2011ApJ...726...23G 2011ApJ...726...23G)
F = FMOS/Subaru (from Muzic et al. 2012ApJ...744..134M 2012ApJ...744..134M)
S = SINFONI/VLT (from Muzic et al. 2012ApJ...744..134M 2012ApJ...744..134M)
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Acknowledgements:
Koraljka Muzic, kmuzic(at)eso.org
References:
Scholz et al., Paper I 2009ApJ...702..805S 2009ApJ...702..805S
Geers et al., Paper II 2011ApJ...726...23G 2011ApJ...726...23G
Muzic et al., Paper III 2011ApJ...732...86M 2011ApJ...732...86M
Scholz et al., Paper IV 2012ApJ...744....6S 2012ApJ...744....6S, Cat. J/ApJ/744/6
Muzic et al., Paper V 2012ApJ...744..134M 2012ApJ...744..134M
Scholz et al., Paper VI 2012ApJ...756...24S 2012ApJ...756...24S, Cat. J/ApJ/744/6
Scholz et al., Paper VII 2013ApJ...775..138S 2013ApJ...775..138S
Muzic et al., Paper VIII 2014ApJ...785..159M 2014ApJ...785..159M, Cat. J/ApJ/785/159
Muzic et al., Paper IX 2015ApJ...810..159M 2015ApJ...810..159M
(End) Patricia Vannier [CDS] 25-Oct-2013