2018A&A...616A..40C


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST13:14:21

2018A&A...616A..40C - Astronomy and Astrophysics, volume 616A, 40-40 (2018/8-1)

A search for OB stars in the field of the galactic OB association Bochum 7. II. Proper motion and IR photometry.

CORTI M.A., ORELLANA R.B. and BOSCH G.L.

Abstract (from CDS):


Aims. We plan to identify the members of the Bochum 7 association by performing simultaneous astrometric and spectrophotometric analyses, and estimate its distance and evolutionary stage.
Methods. We used our own visual spectroscopic and UBV photometric data of a 30'x30' region centered at alpha=8:44:47.2, delta=-45:58:55.5. This information enabled us to estimate the spectral classification and distance of all stars present in the region. The proper motion was analyzed with data of the UCAC 5 catalog and was used to identify the members of this association. We added JHK data from 2MASS and IRAS catalogs to check for the presence of infrared (IR) excess stars.
Results. We found that Bochum 7 is an OB association with at least 27 identified stellar members (l=265.12°, b=-2°) at a distance of ~=5640pc. Its proper motion is µαcosδ=-4.92±0.08mas/yr, µδ=3.26±0.08mas/yr. We derived an average heliocentric radial velocity of ∼35km/s and were able to confirm the binary nature of the (ALS 1135) system and detect four new binary star candidates. Analysis of data for massive Bo 7 star candidates points towards a young age (≤3x106 years old) for the association, although the presence of a previous episode of star formation remains to be analyzed.

Abstract Copyright: © ESO 2018

Journal keyword(s): stars: early-type - proper motions - catalogs - open clusters and associations: individual: Bochum 7

VizieR on-line data: <Available at CDS (J/A+A/616/A40): table3.dat>

Nomenclature: Tables 1-3: [COB2018] NNNN N=248 among (Nos 7-4903). Table 2: [CBN2007] JHHMMSS.s+DDMMSS N=10 added.

Status at CDS:   All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 40

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Number of rows : 40

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 NAME Romano's Star WR* 01 35 09.7011265200 +30 41 57.173367187   16.5 18.04     Ofpe/WN9 45 1
2 NAME Per Arm PoG 03 30 +45.0           ~ 1247 0
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14826 1
4 LHA 120-N 159 HII 05 39 46.650 -69 45 39.94           ~ 248 2
5 GSH 263-02+45 sh 08 37 -44.           ~ 8 0
6 2MASS J08431784-4606180 IR 08 43 17.84112 -46 06 18.0252           ~ 1 0
7 CD-45 4447 * 08 43 24.1560753466 -46 08 28.624567738 10.76 11.26 10.77 11.02   O7.5V 18 0
8 GSC 08151-01988 * 08 43 25.7504002771 -46 08 17.498782905     13.7     B2Ve 2 0
9 GSC 08151-02258 * 08 43 27.6272019511 -46 02 38.189312536     12.6     B0V 2 0
10 2MASS J08433734-4605520 * 08 43 37.34352 -46 05 52.0008           ~ 1 0
11 CPD-45 2910 * 08 43 38.6426134918 -46 08 15.836605106 11.93 12.78 11.98     O9.5V 3 0
12 GSC 08151-01812 * 08 43 44.9350939197 -46 06 53.795807994     12.9     B1V 3 0
13 GSC 08151-00062 * 08 43 46.8698167224 -46 06 39.057626491     14.2     B3V 3 0
14 2MASS J08434760-4600562 * 08 43 47.60544 -46 00 56.2212           ~ 1 0
15 TYC 8151-1072-1 * 08 43 48.7942327366 -46 07 33.712529329   12.64 12.66     ~ 7 0
16 CPD-45 2920 Al* 08 43 49.8049446233 -46 07 08.756732813 10.6 11.36 10.99 10.91   O6.5V(n)((f)) 33 1
17 CD-45 4462 ** 08 43 51.0866710803 -46 03 46.281666246 11.31 11.87 11.36 11.30   OB- 12 0
18 LS 1140 * 08 44 04.5156342687 -45 53 15.932809537 12.06 12.38 11.65 11.45   OB+ 10 0
19 2MASS J08440715-4601548 * 08 44 07.15104 -46 01 54.8616           ~ 1 0
20 IRAS 08426-4601 HII 08 44 17.6 -46 12 05           ~ 4 0
21 GSC 08151-04830 * 08 44 23.2491366015 -46 08 19.197576873 14.02 14.43 13.71 13.61   ~ 2 0
22 CD-45 4472 * 08 44 25.0614191499 -45 53 34.554408298 11.45 11.90 11.29 11.21   OB 13 0
23 GSC 08151-03643 * 08 44 31.6252214451 -45 53 14.849774881     13.5     B2III: 2 0
24 CPD-45 2951 * 08 44 39.0790091493 -46 07 45.033861634   12.14 12.13     B5V 3 0
25 2MASS J08444228-4609013 * 08 44 42.28344 -46 09 01.3788           ~ 1 0
26 CD-45 4482 WR* 08 44 47.2902196838 -45 58 55.414166402 10.95 11.29 10.74 10.58   WN8h+? 98 0
27 C 0843-458 OpC 08 44.8 -45 58   6.94 6.8     ~ 36 0
28 CPD-45 2961 * 08 44 51.0384214374 -46 10 10.756884022 11.55 12.07 11.53 11.45   OB 10 0
29 2MASS J08450226-4607572 * 08 45 02.26536 -46 07 57.2052           ~ 1 0
30 CD-45 4494 Em* 08 45 06.4412214685 -46 09 04.628749982 11.57 12.03 11.44 11.21   B1Ve 13 0
31 GSC 08151-04203 * 08 45 18.2205422501 -45 58 16.690679446     13.6     B0.5V 2 0
32 2MASS J08451829-4600418 * 08 45 18.29424 -46 00 41.8176           ~ 1 0
33 UCAC2 12177291 * 08 45 18.8876921566 -45 41 49.433006100     14.8     B5V 3 0
34 2MASS J08451895-4600221 * 08 45 18.95208 -46 00 22.1940           ~ 1 0
35 2MASS J08453526-4600351 * 08 45 35.26368 -46 00 35.1828           ~ 1 0
36 2MASS J08453890-4557364 * 08 45 38.90232 -45 57 36.4896           ~ 1 0
37 2MASS J08454120-4611127 * 08 45 41.20128 -46 11 12.7068           ~ 1 0
38 Ass Vel OB 1 As* 08 49.9 -45 00           ~ 92 0
39 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11533 0
40 NAME Puppis Window reg ~ ~           ~ 9 0

    Equat.    Gal    SGal    Ecl

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2020.07.04-13:14:21

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