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

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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 - 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 46.6 -31 41 38   7.31 6.9     ~ 140 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 298 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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2023.06.01-21:19:56

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