2004A&A...425..927K

Query : 2004A&A...425..927K

2004A&A...425..927K - Astronomy and Astrophysics, volume 425927-936 (2004/10-3)

Substellar objects in star formation regions: A deep near infrared study in the Serpens cloud.

KLOTZ A., CAUX E., MONIN J.-L. and LODIEU N.

Abstract (from CDS):

We present near infrared (J, H and Ks) observations of a 5'x10' sample field in the Serpens Star Formation region obtained with SOFI at the NTT. These observations are sensitive enough to detect a 20MJup brown dwarf through an extinction of AV∼16 and are used to build an infrared census of this field in the cluster. From photometry and mass-luminosity models, we have developed a detailed methodology to extract quantitative parameters (distance modulus, extinction, spectral type, masses) for objects observed towards and inside the Serpens molecular cloud. An extinction map of the region is derived allowing us to disentangle cloud members from background field objects. Luminosities and masses for 14 low-mass stars and substellar object candidate members of the cluster are derived. Three of these objects have masses compatible with the brown dwarf regime and one of them (BD-Ser 1) was observed spectroscopically with ISAAC at the VLT, confirming its substellar status. Long-term photometric variability of BD-Ser 1 could be consistent with signs of accretion.

Abstract Copyright: ∼

Journal keyword(s): stars: low-mass, brown dwarfs - ISM: clouds - ISM: individual objects: Serpens molecular cloud

VizieR on-line data: <Available at CDS (J/A+A/425/927): table1.dat>

Nomenclature: Table 2: [KCM2004] BD-Ser N (Nos 1-3), [KCM2004] JHHMMSS.ss+DDMMSS.s N=14.

Simbad objects: 26

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Number of rows : 26
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Cl Melotte 20 MGr 03 26 50.6 +48 51 48           ~ 928 0
2 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
3 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1453 0
4 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1708 1
5 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 623 0
6 NGC 2168 OpC 06 09 07.5 +24 20 15           ~ 604 0
7 NGC 2516 OpC 07 58 00.5 -60 46 36           ~ 793 0
8 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
9 IC 2391 OpC 08 41 17.5 -53 03 00           ~ 871 0
10 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1266 1
11 2MASS J18293409+0117292 * 18 29 34.10 +01 17 29.3           ~ 1 0
12 2MASS J18293748+0114541 * 18 29 37.4874285840 +01 14 54.164837940           ~ 1 0
13 2MASS J18293978+0117117 * 18 29 39.79 +01 17 11.8           ~ 1 0
14 2MASS J18294193+0117135 * 18 29 41.93 +01 17 13.5           ~ 1 0
15 2MASS J18294234+0112019 Y*O 18 29 42.349 +01 12 01.97           M7.0 5 0
16 [KCM2004] J182942.53+011619.1 * 18 29 42.53 +01 16 19.1           ~ 1 0
17 [KCM2004] J182943.12+011501.1 * 18 29 43.12 +01 15 01.1           ~ 1 0
18 2MASS J18294376+0110470 * 18 29 43.7610835632 +01 10 47.079087384           ~ 1 0
19 [KCM2004] J182944.73+011350.9 * 18 29 44.73 +01 13 50.9           ~ 1 0
20 2MASS J18294567+0111123 * 18 29 45.67 +01 11 12.3           ~ 1 0
21 2MASS J18294623+0108558 * 18 29 46.23 +01 08 55.9           ~ 1 0
22 [KCM2004] J182947.17+011601.5 * 18 29 47.17 +01 16 01.5           ~ 1 0
23 2MASS J18294878+0113422 Y*O 18 29 48.787 +01 13 42.22           ~ 12 0
24 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 1195 1
25 2MASS J18295317+0112275 BD* 18 29 53.176 +01 12 27.55           L 16 0
26 2MASS J18295688+0114463 Or* 18 29 56.8848005064 +01 14 46.304766672   17.6       K8.0 106 0

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