2011MNRAS.418.1375F

Query : 2011MNRAS.418.1375F

2011MNRAS.418.1375F - Mon. Not. R. Astron. Soc., 418, 1375-1381 (2011/December-1)

About the nature of Mercer 14.

FROEBRICH D. and IOANNIDIS G.

Abstract (from CDS):

We used UK Infrared Telescope (UKIRT) near-infrared (NIR) broad-band JHK photometry, narrow band imaging of the 1-0 S(1) molecular hydrogen emission line and mid-infrared Spitzer IRAC data to investigate the nature of the young cluster Mercer 14. Foreground star counts in decontaminated NIR photometry and a comparison with the Besancon Galaxy Model are performed to estimate the cluster distance. This method yields a distance of 2.5 kpc with an uncertainty of about 10 per cent and can be applied to other young and embedded clusters. Mercer 14 shows clear signs of ongoing star formation with several detected molecular hydrogen outflows, a high fraction of infrared excess sources and an association to a small gas and dust cloud. Hence, the cluster is less than 4 Myr old and has a line-of-sight extinction of AK = 0.8 mag. Based on the most massive cluster members we find that Mercer 14 is an intermediate mass cluster with about 500 M☉.

Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): stars: formation - ISM: jets and outflows - open clusters and associations: individual: Mercer 14

Nomenclature: Paragr. 3.4: MHO NNNN (Nos 2423-2428) added. Table 1: [FI2011] A (Nos A-E). Table 2, Fig. 1: [FI2011] MHO NNNN A N=8.

Simbad objects: 23

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Number of rows : 23
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 [MCM2005b] 14 Cl* 18 58 05 +01 36.6           ~ 7 0
2 SPICY 95657 Y*O 18 58 05.50632 +01 36 59.6952           ~ 3 0
3 MHO 2423 EmO 18 58 05.6 +01 37 20           ~ 1 0
4 [FI2011] MHO 2423 A out 18 58 05.9 +01 37 20           ~ 2 0
5 EGO G035.13-0.74 of? 18 58 06.4 +01 37 01           ~ 13 0
6 [FI2011] B Y*O 18 58 06.4 +01 37 02           ~ 1 0
7 [FI2011] D Y*O 18 58 06.4 +01 37 07           ~ 1 0
8 [FI2011] MHO 2424 A out 18 58 06.5 +01 36 52           ~ 2 0
9 [FI2011] A Y*O 18 58 06.5 +01 36 52           ~ 1 0
10 MHO 2424 EmO 18 58 06.5 +01 36 52           ~ 1 0
11 MHO 2426 EmO 18 58 06.7 +01 37 15           ~ 1 0
12 [FI2011] MHO 2426 A out 18 58 06.7 +01 37 15           ~ 2 0
13 [FI2011] MHO 2426 B out 18 58 07.0 +01 37 00           ~ 2 0
14 [FI2011] MHO 2423 B out 18 58 07.2 +01 36 52           ~ 2 0
15 MHO 2428 EmO 18 58 07.3 +01 36 58           ~ 1 0
16 SPICY 95674 Y*O 18 58 07.501 +01 36 41.30           ~ 2 0
17 MHO 2425 EmO 18 58 07.6 +01 37 30           ~ 2 0
18 [FI2011] MHO 2424 B out 18 58 08.0 +01 36 33           ~ 2 0
19 [FI2011] MHO 2427 A out 18 58 08.5 +01 37 32           ~ 1 0
20 MHO 2427 EmO 18 58 08.5 +01 37 32           ~ 1 0
21 [FI2011] MHO 2427 B out 18 58 09.9 +01 37 22           ~ 1 0
22 [DLW84] G35.2S HII 18 58 10.4846977680 +01 36 57.226716432   16.80 14.72 14.37 12.22 ~ 60 4
23 [DLW84] G35.2N HII 18 58 13.036 +01 40 36.00           ~ 138 0

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