2001A&A...372...95K

Query : 2001A&A...372...95K

2001A&A...372...95K - Astronomy and Astrophysics, volume 372, 95-104 (2001/6-2)

The association surrounding NGC 2439.

KALTCHEVA N., GREDEL R. and FABRICIUS C.

Abstract (from CDS):

The structure of the field surrounding the Galactic cluster NGC 2439 is studied utilizing uvbyβ photometry of bright OB stars. We collate all photometric and kinematic data available to identify possible groupings. The stars of our sample show a large scatter in their distances, radial velocities, proper motions and reddenings. We conclude that they do not belong to a single stellar association. We find evidence of the existence of three coherent structures at distances of 370pc, 1kpc, and 2.6-3.2kpc. The high stellar density toward NGC 2439 is very likely due to a decreased absorption in this direction, which poses some doubt on the reality of the cluster. A comprehensive uvbyβ study of NGC 2439 is required to clarify its nature. The spatial distribution of the stars and their reddening are used to characterise the spatial distribution of the visual extinction in the region. The results obtained confirm previously determined constraints on the formation mechanism of interstellar CH⁺ towards the NGC 2439 field.

Abstract Copyright: ∼

Journal keyword(s): stars: early type - stars: fundamental parameters - open clusters and associations: individual: NGC 2439 - ISM: clouds

VizieR on-line data: <Available at CDS (J/A+A/372/95): table2.dat>

Simbad objects: 26

Full paper

View the references in ADS

Number of rows : 26

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Sp type	#ref 1850 - 2023	#notes
1	HD 57120	**	07 18 33.40647	-30 47 55.6386					B2V	27	0
2	HD 61595	*	07 38 44.4922669944	-31 43 52.268170512		8.83	8.30		F8V	26	0
3	CD-32 4257	*	07 39 21.0224887848	-32 31 04.964986704	9.43	10.34	9.96	9.97	B2V	21	0
4	HD 61687	*	07 39 29.8508207664	-26 55 08.370220368	6.14	6.650	6.774		B3/5V	27	1
5	HD 61989	PM*	07 40 30.5147703840	-33 25 34.260095424		7.85	7.32		F7V	32	0
6	NGC 2439	OpC	07 40 47	-31 41.6		7.31	6.9		~	139	0
7	CD-31 4911	*	07 40 53.3998246368	-31 41 19.501493064	8.3	9.53	9.29	9.51	B1.5Ib	29	0
8	CD-33 4043	*	07 41 39.9790488816	-33 49 54.029798508	9.69	10.30	9.92	9.99	O8	21	0
9	CD-32 4296	*	07 41 40.6892360280	-32 37 41.532487320	9.9	10.64	10.18	10.17	B0.5III	19	0
10	HD 62315	SB*	07 42 06.6636727584	-30 11 10.715784468		6.773	6.933		B3/5V	30	0
11	HD 62374	Pu*	07 42 22.9746332544	-31 44 26.430668988		8.68	8.72		B5V	8	0
12	HD 62539	PM*	07 43 03.0998109624	-33 18 44.820275976		7.71	7.36		F0IV	21	0
13	HD 62735	*	07 44 09.6646683768	-31 40 50.557100772		7.85	7.49		A9IV	16	0
14	TYC 7114-2696-1	*	07 44 15.1968637872	-34 23 53.814737256		12.60	11.23	10.83	OB+	18	0
15	CD-32 4372	*	07 45 32.3011155408	-32 51 00.800048232	11.49	11.78	10.89	10.79	B1II	27	0
16	* 171 Pup	PM*	07 45 34.9212542040	-34 10 21.185626324		5.909	5.362		F9V	295	0
17	CD-33 4131	*	07 46 30.5559161712	-33 25 53.968576584	12.26	12.06	10.56	10.24	OB+	19	0
18	CD-33 4141	*	07 47 13.1506505880	-33 20 30.035551920	11.11	11.15	9.88	9.72	B2.5I:	21	0
19	HD 63447	*	07 47 38.1625288968	-32 51 34.809313860		8.91	8.61		A9V	9	0
20	TYC 7114-1044-1	*	07 47 42.7112716632	-33 47 26.470209156	13.1	13.03	11.96	11.71	OB	17	0
21	CD-33 4162	*	07 48 09.4032632784	-33 43 05.025708840	12.52	12.54	11.43	11.21	OB+	18	0
22	HD 63639	*	07 48 37.3128045624	-33 55 40.911544128		9.54	9.12		F3V	10	0
23	CD-32 4444	s*b	07 49 19.2708075216	-32 37 21.255356280	11.94	11.66	10.57	10.29	B9Iab	15	0
24	CD-28 5156	*	07 57 25.1115911376	-29 10 03.796860504	9.29	10.61	10.17	10.23	OB	20	0
25	HD 66539	*	08 02 48.4301704536	-31 12 56.517482088	6.97	7.62	7.65		B3III	14	0
26	HD 66582	*	08 02 53.5791148872	-33 09 12.809278764	6.54	7.211	7.336		B3IV	20	0

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