2005AJ....130.1719L

Query : 2005AJ....130.1719L

2005AJ....130.1719L - Astron. J., 130, 1719-1732 (2005/October-0)

Two 2MASS-selected young stellar clusters: photometry, spectroscopy, and the initial mass function.

LEISTRA A., COTERA A.S., LIEBERT J. and BURTON M.

Abstract (from CDS):

We present near-IR (NIR) J, H, and Ks images and K-band spectroscopy of two newly discovered stellar clusters at different stages of evolution. Our spectra suggest the presence of massive young stellar objects in the heavily embedded cluster in the star-forming region near radio source G353.4-0.4 and an O5-O6 V star in the cluster near radio source G305+00.2. We determine a K-band luminosity function (KLF) for both clusters and an initial mass function (IMF) for the cluster near G305+00.2. The derived IMF slope is Γ=-1.5 if the KLF is used to derive the IMF and is Γ=-0.98 if the color-magnitude diagram (CMD) and spectra are used. The more reliable CMD-based slope is flatter than the Salpeter value usually found for stellar clusters. We find that using the KLF alone to derive an IMF is likely to produce an overly steep slope in stellar clusters subject to variable extinction.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Open Clusters and Associations: General - Stars: Formation - Stars: Luminosity Function, Mass Function

VizieR on-line data: <Available at CDS (J/AJ/130/1719): table3.dat>

Nomenclature: Text: [LCL2005b] GLLL.l+B.b N=1, [LCL2005b] GLLL.l+B.bb N=1. Table 1: [LCL2005b] G305.3+0.2 AN (Nos A1-A3). Table 2: [LCL2005b] G353.4-0.36 BN (Nos B1-B3). Table 3: [LCL2005b] JHHMMSS.sss+DDMMSS.ss N=112.

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 16

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Number of rows : 16
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 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
2 RMC 136 Cl* 05 38 42.396 -69 06 03.36   5.81 5.40     ~ 2236 2
3 NGC 3576 HII 11 11 53.2 -61 18 26           ~ 245 2
4 [LCL2005b] G305.3+0.2 A2 * 13 11 33.88 -62 33 27.1           B0V-B1V 5 0
5 [DBS2003] 131 OpC 13 11 39.400 -62 33 11.55           ~ 16 0
6 [LCL2005b] G305.3+0.2 A3 * 13 11 39.50 -62 33 28.2           B2V-B3V 4 0
7 [LCL2005b] G305.3+0.2 A1 * 13 11 41.04 -62 32 56.8           O5V-O6V 4 0
8 Cl Danks 1 OpC 13 12 29.0 -62 41 56           ~ 80 0
9 Cl Danks 2 OpC 13 12 53.3 -62 40 52           ~ 73 0
10 V* V963 Cen SB* 13 18 44.3568297792 -58 16 01.258922892   9.24 8.59     G2V 45 0
11 HD 157017 PM* 17 22 13.5149466624 -31 39 28.917557964   9.62 9.03     G2V 18 0
12 [LCL2005b] G353.4-0.36 B3 * 17 30 27.8 -34 41 40           ~ 1 0
13 [LCL2005b] G353.4-0.36 B1 * 17 30 27.80 -34 41 28.1           ~ 1 0
14 [LCL2005b] G353.4-0.36 B2 * 17 30 27.90 -34 41 34.7           ~ 1 0
15 [BDB2003] G353.42-00.36 Cl* 17 30 28.2 -34 41 30           ~ 6 0
16 M 16 OpC 18 18 45.1 -13 47 31           ~ 1084 1

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