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


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.24CEST06:54:23

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

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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 - 2020
#notes
1 CCDM J07186-3048AB ** 07 18 33.40647 -30 47 55.6386   6.79 6.98     B2V 24 1
2 HD 61595 * 07 38 44.4929660422 -31 43 52.227982816   8.83 8.30     F8V 21 0
3 CD-32 4257 * 07 39 21.0226393094 -32 31 04.964838470 9.43 10.34 9.96 9.97   B2V 20 0
4 HD 61687 * 07 39 29.8505039193 -26 55 08.373890621 6.14 6.650 6.774     B3/5V 22 1
5 HD 61989 PM* 07 40 30.5153643714 -33 25 34.249709406   7.85 7.32     F7V 26 0
6 NGC 2439 OpC 07 40 45 -31 41.6   7.31 6.9     ~ 129 0
7 CD-31 4911 * 07 40 53.3998607995 -31 41 19.501243418 8.3 9.53 9.29 9.51   B1.5Ib 25 0
8 CD-33 4043 * 07 41 39.9791237727 -33 49 54.027670210 9.69 10.30 9.92 9.99   O8 20 0
9 CD-32 4296 * 07 41 40.6893062878 -32 37 41.532414040 9.9 10.64 10.18 10.17   B0.5III 16 0
10 HD 62315 SB* 07 42 06.6639058780 -30 11 10.713433907   6.773 6.933     B3/5V 23 0
11 HD 62374 * 07 42 22.9746026410 -31 44 26.429271851   8.68 8.72     B5V 7 0
12 HD 62539 PM* 07 43 03.0999736113 -33 18 44.817669051   7.71 7.36     F0IV 15 0
13 HD 62735 * 07 44 09.6646022372 -31 40 50.554856805   7.85 7.49     A9IV 11 0
14 TYC 7114-2696-1 * 07 44 15.1970620573 -34 23 53.814936324   12.60 11.23 10.83   OB+ 14 0
15 CD-32 4372 * 07 45 32.3012175579 -32 51 00.797585908 11.49 11.78 10.89 10.79   B1II 25 0
16 * 171 Pup PM* 07 45 34.9191268687 -34 10 21.283643355   5.909 5.362     F9V 280 0
17 CD-33 4131 * 07 46 30.5557323130 -33 25 53.966307111 12.26 12.06 10.56 10.24   OB+ 17 0
18 CD-33 4141 * 07 47 13.1506716325 -33 20 30.035514281 11.11 11.15 9.88 9.72   B2.5I: 18 0
19 HD 63447 * 07 47 38.1624035683 -32 51 34.808262893   8.91 8.61     A9V 7 0
20 TYC 7114-1044-1 * 07 47 42.7113727754 -33 47 26.467677994 13.1 13.03 11.96 11.71   OB 13 0
21 CD-33 4162 * 07 48 09.4032879782 -33 43 05.024620197 12.52 12.54 11.43 11.21   OB+ 14 0
22 HD 63639 * 07 48 37.3151316803 -33 55 40.909381058   9.54 9.12     F3V 8 0
23 CD-32 4444 s*b 07 49 19.2708747905 -32 37 21.253240457 11.94 11.66 10.57 10.29   B9Iab 14 0
24 CD-28 5156 * 07 57 25.1119880181 -29 10 03.795622471 9.29 10.61 10.17 10.23   OB 20 0
25 HD 66539 * 08 02 48.4302083999 -31 12 56.515010991 6.97 7.62 7.65     B3III 13 0
26 HD 66582 * 08 02 53.5793358744 -33 09 12.808039610 6.54 7.211 7.336     B3IV 16 0

    Equat.    Gal    SGal    Ecl

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2020.10.24-06:54:23

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