2006MNRAS.367.1441B

Query : 2006MNRAS.367.1441B

2006MNRAS.367.1441B - Mon. Not. R. Astron. Soc., 367, 1441-1449 (2006/April-3)

NGC 2401: a template of the young population of the Norma-Cygnus arm in the Third Galactic Quadrant.

BAUME G., MOITINHO A., VAZQUEZ R.A., SOLIVELLA G., CARRARO G. and VILLANOVA S.

Abstract (from CDS):

Based on a deep optical CCD [UBV(RI)C] photometric survey and on the Two-Micron All Sky Survey (2MASS) data, we derived the main parameters of the open cluster NGC 2401. We found that this cluster is placed at 6.3 ±0.5 kpc (VO-MV= 14.0±0.2) from the Sun and is 25 Myr old, which allows us to identify NGC 2401 as a member of the young population belonging to the innermost side of the extension of the Norma-Cygnus spiral arm in the Third Galactic Quadrant. A spectroscopic study of the emission star LSS 440 that lies in the cluster area revealed that it is a B0Ve star; however, we could not confirm that it is a cluster member. We also constructed the cluster luminosity function (LF) down to V∼ 22 and the cluster initial mass function (IMF) for all stars with masses above M∼ 1-2M☉. It was found that the slope of the cluster IMF is x~ 1.8±0.2. The presence of a probable pre-main-sequence (PMS) star population associated with the cluster is weakly revealed.

Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS

Journal keyword(s): stars: emission-line, Be - stars: imaging - stars: individual: LSS 440 - stars: luminosity function, mass function - open clusters and associations: individual: NGC 2401 - Galaxy: structure

VizieR on-line data: <Available at CDS (J/MNRAS/367/1441): table1.dat>

Nomenclature: Table 1: Cl* NGC 2401 BMV NNNN (Nos 1-3261).

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 7

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Number of rows : 7
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 Dolidze 25 OpC 06 45 06 +00 18.0   8.19 7.6     ~ 79 1
2 Cl Bochum 2 OpC 06 48 54 +00 23.0   10.24 9.7     ~ 39 0
3 NGC 2401 OpC 07 29 24.9 -13 58 08     12.6     ~ 31 0
4 EM* MWC 844 Em* 07 29 30.2094209256 -13 59 12.491139984   12.20 11.91 11.93   OBe 13 0
5 Cl Haffner 18 OpC 07 52 40.0 -26 23 28   10.09 9.3     ~ 60 1
6 Cl VDBH 24 OpC 08 18 18.8 -37 06 06   11.33 10.7     ~ 40 0
7 NAME Norma-Cygnus Arm reg ~ ~           ~ 79 0

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