J/ApJ/744/6 SONYC census of very low-mass objects in NGC1333 (Scholz+, 2012)
Substellar objects in nearby young clusters (SONYC).
IV. A census of very low mass objects in NGC 1333.
Scholz A., Muzic K., Geers V., Bonavita M., Jayawardhana R., Tamura M.
<Astrophys. J., 744, 6 (2012)>
=2012ApJ...744....6S 2012ApJ...744....6S
=2012ApJ...756...24S 2012ApJ...756...24S
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
Description:
SONYC - Substellar Objects in Nearby Young Clusters - is a program to
investigate the frequency and properties of young substellar objects
with masses down to a few times that of Jupiter. In a series of papers
we have obtained follow-up spectroscopy for a large number of
candidate very low mass (VLM) members of the ∼1Myr old cluster NGC1333
in the Perseus star forming region. For more details on the survey,
see the associated paper (Scholz et al., 2012ApJ...744....6S 2012ApJ...744....6S). Here we
present a census of spectroscopically confirmed very low mass objects
in NGC1333. We include all objects with spectral type of M5 or later
and/or effective temperature of 3200K or cooler. In total, there are
now 58 objects which fulfill these criteria. In three tables we list
photometric and spectroscopic properties for our own sample as well as
for objects listed in the literature. In addition, we also include
three tables of the objects that have been rejected as very low mass
cluster members based on our spectroscopic follow-up. Finally, we
attach the two photometric candidate lists from which the
spectroscopic sample was extracted, see Scholz et al.
(2012ApJ...756...24S 2012ApJ...756...24S) for more details on these catalogues.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 106 10 New very low mass members in NGC 1333,
Table 2 from 2012ApJ...744....6S 2012ApJ...744....6S
table4.dat 114 41 Previously confirmed very low mass members in
NGC 1333, Table 4 from 2012ApJ...744....6S 2012ApJ...744....6S
table6.dat 70 63 Objects excluded by spectroscopy in this paper,
Table 6 from 2012ApJ...744....6S 2012ApJ...744....6S
table7.dat 59 15 Objects excluded by spectroscopy by Scholz et
al. (2009ApJ...702..805S 2009ApJ...702..805S),
Table 7 from 2012ApJ...744....6S 2012ApJ...744....6S
tablen1.dat 86 7 New very low mass members of NGC 1333,
Table 1 from 2012ApJ...756...24S 2012ApJ...756...24S
tablen2.dat 44 12 Objects ruled out as very low mass members of
NGC 1333, Table 2 from 2012ApJ...756...24S 2012ApJ...756...24S
izcat.dat 40 196 IZ candidate catalogue (photometry only)
jkscat.dat 59 824 JKs candidate catalogue (photometry only)
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See also:
J/AJ/140/266 : NGC 1333 X-ray luminous YSOs properties (Winston+, 2010)
J/AJ/136/1372 : Very low-mass YSOs in NGC 1333 (Oasa+, 2008)
J/ApJ/674/336 : Spitzer observations of NGC 1333 (Gutermuth+, 2008)
J/ApJ/655/958 : 90-GHz observations in NGC 1333 (Walsh+, 2007)
J/AJ/127/1131 : NGC 1333 low-mass stars infrared photometry (Wilking+, 2004)
J/A+A/401/543 : XMM-Newton observations of NGC 1333 (Preibisch, 2003)
J/ApJ/575/354 : Young stellar objects in the NGC 1333 (Getman+, 2002)
J/AJ/111/1964 : JHK photometry of NGC1333 (Lada+, 1996)
J/MNRAS/387/954 : H2 imaging of NGC 1333, L1455, L1448 and B1 (Davis+, 2008)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- --- [SONYC-NGC1333-]
15- 16 I2 --- SONYC SONYC number in Simbad
19- 20 I2 h RAh Right ascension (J2000)
22- 23 I2 min RAm Right ascension (J2000)
25- 29 F5.2 s RAs Right ascension (J2000)
32 A1 --- DE- Declination sign (J2000)
33- 34 I2 deg DEd Declination (J2000)
36- 37 I2 arcmin DEm Declination (J2000)
39- 42 F4.1 arcsec DEs Declination (J2000)
45- 50 F6.3 mag i'mag ?=0 i'-band magnitude (SDSS system) (1)
53- 58 F6.3 mag z'mag ?=0 z'-band magnitude (SDSS system) (1)
61- 66 F6.3 mag Jmag J-band magnitude (2MASS system) (2)
69- 74 F6.3 mag Kmag K-band magnitude (2MASS system) (2)
77- 78 I2 mag Av1 Visual extinction from photometry (3)
80- 81 I2 mag Av2 Visual extinction from spectroscopy (4)
84- 87 A4 --- SpT MK spectral type (5)
90- 93 I4 K Teff Effective temperature (6)
96-106 A11 --- Names Other names (7)
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Note (1): i- and z-band photometry from Scholz et al. (2009ApJ...702..805S 2009ApJ...702..805S),
0.000 when not available.
Note (2): J- and K-band photometry from 2MASS or Scholz et al.
(2009ApJ...702..805S 2009ApJ...702..805S).
Note (3): Calculated from the J- and K-band magnitudes.
Note (4): Corrected AV after spectral fitting.
Note (5): Estimated using the HPI index.
Note (6): Estimated by comparing the spectra to models.
Note (7): Identifiers are from Wilking et al. (2004AJ....127.1131W 2004AJ....127.1131W, MBO) and
Gutermuth et al. (2008ApJ...674..336G 2008ApJ...674..336G, Sp).
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- ID Name (1)
19- 20 I2 h RAh Right ascension (J2000)
22- 23 I2 min RAm Right ascension (J2000)
25- 29 F5.2 s RAs Right ascension (J2000)
32 A1 --- DE- Declination sign (J2000)
33- 34 I2 deg DEd Declination (J2000)
36- 37 I2 arcmin DEm Declination (J2000)
39- 42 F4.1 arcsec DEs Declination (J2000)
45- 50 F6.3 mag Jmag J-band magnitude (2MASS system) (2)
53- 58 F6.3 mag Kmag K-band magnitude (2MASS system) (2)
61- 64 A4 --- SpT1 MK spectral type (3)
65 A1 --- --- [,]
66- 69 A4 --- SpT2 MK spectral type (3)
70 A1 --- --- [,]
71- 74 A4 --- SpT3 MK spectral type (3)
75 A1 --- --- [,]
76- 79 A4 --- SpT4 MK spectral type (3)
82- 85 I4 --- Teff1 ?=0 Effective temperature(s) (3)
86 A1 --- --- [,]
87- 90 I4 --- Teff2 ? Effective temperature(s) (3)
91 A1 --- --- [,]
92- 95 I4 --- Teff3 ? Effective temperature(s) (3)
98-114 A17 --- Names Other names (1)
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Note (1): Identifiers are from
* Scholz et al. (2009ApJ...702..805S 2009ApJ...702..805S; SONYC-NGC1333-NN),
* Aspin et al. (1994A&AS..106..165A 1994A&AS..106..165A; ASRNN),
* Wilking et al. (2004AJ....127.1131W 2004AJ....127.1131W; MBONN) and
* Gutermuth et al. (2008ApJ...674..336G 2008ApJ...674..336G; SpNN).
Note that a few more objects with SONYC identifiers are listed in
Table 2 of Scholz et al. (2009ApJ...702..805S 2009ApJ...702..805S). They are not
included here because they do not fulfill the criteria for very low
mass objects (see description).
Note (2): J- and K-band photometry from 2MASS or Scholz et al.
(2009ApJ...702..805S 2009ApJ...702..805S)
Note (3): Spectral types and effective temperature are from SONYC, Wilking
et al. (2004AJ....127.1131W 2004AJ....127.1131W), Greissl et al. (2007AJ....133.1321G 2007AJ....133.1321G), or
Winston et al. (2009AJ....137.4777W 2009AJ....137.4777W)
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Byte-by-byte Description of file: table[67].dat
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Bytes Format Units Label Explanations
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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)
14 A1 --- DE- Declination sign (J2000)
15- 16 I2 deg DEd Declination (J2000)
18- 19 I2 arcmin DEm Declination (J2000)
21- 24 F4.1 arcsec DEs Declination (J2000)
27- 32 F6.3 mag Jmag ?=0 J-band magnitude (2MASS system) (1)
35- 40 F6.3 mag Kmag ?=0 K-band magnitude (2MASS system) (1)
43- 44 A2 --- Cat Photometric catalogue (2)
47 A1 --- Spec Source of spectrum (3)
50- 70 A21 --- Names Identifier (4)
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Note (1): J- and K-band photometry from 2MASS, 0.000 if not available.
Note (2): Selected from the IZ catalogue (IZ) or the JK catalogue (JK)
Note (3): Source of the spectrum, FMOS (F) or MOIRCS (M)
Note (4): Identifiers from Lada et al. (1996AJ....111.1964L 1996AJ....111.1964L, [LAL96]NNN)
and Wilking et al. (2004AJ....127.1131W 2004AJ....127.1131W, MBONN); if no identifier is
listed, the object does not have a known counterpart within 1".
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Byte-by-byte Description of file: tablen1.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- --- [SONYC-NGC1333-]
15- 16 I2 --- SONYC SONYC number in Simbad
19- 20 I2 h RAh Right ascension (J2000)
22- 23 I2 min RAm Right ascension (J2000)
25- 29 F5.2 s RAs Right ascension (J2000)
32 A1 --- DE- Declination sign (J2000)
33- 34 I2 deg DEd Declination (J2000)
36- 37 I2 arcmin DEm Declination (J2000)
39- 42 F4.1 arcsec DEs Declination (J2000)
45- 50 F6.3 mag Jmag ?=0 J-band magnitude (2MASS system) (1)
53- 58 F6.3 mag Kmag K-band magnitude (2MASS system) (1)
61- 64 A4 --- SpT MK spectral type (2)
67- 68 I2 mag Av1 ?=-1 Visual extinction from photometry (3)
71- 72 I2 mag Av2 Visual extinction from spectroscopy (4)
75- 78 I4 K Teff Effective temperature (5)
81- 86 A6 --- Cat Photometric catalogue (6)
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Note (1): J- and K-band photometry from 2MASS or Scholz et al.
(2009ApJ...702..805S 2009ApJ...702..805S), 0.000 when not available.
Note (2): Estimated using the HPI index.
Note (3): Calculated from the J- and K-band magnitudes, -1 when not available.
Note (4): Corrected AV after spectral fitting.
Note (5): Estimated by comparing the spectra to models.
Note (6): Selected from the IZ catalogue (IZ) or
the JK+Spitzer catalogue (JKS), or randomly.
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Byte-by-byte Description of file: tablen2.dat
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Bytes Format Units Label Explanations
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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)
14 A1 --- DE- Declination sign (J2000)
15- 16 I2 deg DEd Declination (J2000)
18- 19 I2 arcmin DEm Declination (J2000)
21- 24 F4.1 arcsec DEs Declination (J2000)
27- 44 A18 --- Comm Comments
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Byte-by-byte Description of file: izcat.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)
14 A1 --- DE- Declination sign (J2000)
15- 16 I2 deg DEd Declination (J2000)
18- 19 I2 arcmin DEm Declination (J2000)
21- 24 F4.1 arcsec DEs Declination (J2000)
27- 32 F6.3 mag i'mag i'-band magnitude (SDSS system)
35- 40 F6.3 mag z'mag z'-band magnitude (SDSS system)
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Byte-by-byte Description of file: jkscat.dat
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Bytes Format Units Label Explanations
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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)
14 A1 --- DE- Declination sign (J2000)
15- 16 I2 deg DEd Declination (J2000)
18- 19 I2 arcmin DEm Declination (J2000)
21- 25 F5.2 arcsec DEs Declination (J2000)
28- 33 F6.3 mag Jmag J-band magnitude (2MASS system)
36- 41 F6.3 mag Kmag K-band magnitude (2MASS system)
44- 49 F6.3 mag [3.6] Spitzer/IRAC1 (3.6mu) magnitude (1)
52- 57 F6.3 mag [4.5] Spitzer/IRAC2 (4.5mu) magnitude (1)
59 A1 --- Dup [D] Duplicate (2)
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Note (1): Spitzer photometry derived from the 'HREL' catalog from the
Spitzer 'Cores to Disks' (C2D) legacy program (2009ApJS..181..321E 2009ApJS..181..321E)
Note (2): Duplicates detected in more than one field are marked with a D
(in total 63).
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Nomenclature notes:
* SONYC-NGC1333-NN identified as in Simbad
* SpNN identified as <[GMM2008] NN> in Simbad.
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, J/ApJ/744/6
Muzic et al., Paper V 2012ApJ...744..134M 2012ApJ...744..134M, J/ApJ/744/134
Muzic et al., Paper VI 2012ApJ...756...24S 2012ApJ...756...24S, J/ApJ/756/24
Scholz et al., Paper VII 2013ApJ...775..138S 2013ApJ...775..138S
Muzic et al., Paper VIII 2014ApJ...785..159M 2014ApJ...785..159M, J/ApJ/785/159
Muzic et al., Paper IX 2015ApJ...810..159M 2015ApJ...810..159M
(End) Scholz [Dublin Institute for Advanced Studies] 19-Dec-2012