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

Query : 2018A&A...616A..40C

2018A&A...616A..40C - Astronomy and Astrophysics, volume 616A40-40 (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

goto Full paper

goto View the references in ADS

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 - 2026 		#notes
1 NAME Romano Star WR* 01 35 09.7011882336 +30 41 57.160957560     18.04     Ofpe/WN9 59 1
2 NAME Per Arm PoG 03 30 +45.0           ~ 1672 0
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
4 LHA 120-N 159 HII 05 39 46.650 -69 45 39.94           ~ 293 2
5 GSH 263-02+45 sh 08 37 -44.           ~ 8 0
6 2MASS J08431784-4606180 * 08 43 17.8395157752 -46 06 18.037635696           ~ 1 0
7 CD-45 4447 * 08 43 24.1537949616 -46 08 28.658569200 10.76 11.26 10.77 11.02   O7.5V 20 0
8 GSC 08151-01988 * 08 43 25.7502753360 -46 08 17.496939696     13.7     B2Ve 2 0
9 GSC 08151-02258 * 08 43 27.6271264008 -46 02 38.191080012     12.6     B0V 3 0
10 2MASS J08433734-4605520 * 08 43 37.3380723456 -46 05 52.016928828           ~ 1 0
11 CPD-45 2910 * 08 43 38.6424844224 -46 08 15.837813492 11.93 12.78 11.98     O9.5V 4 0
12 GSC 08151-01812 * 08 43 44.9350784880 -46 06 53.796706740     12.9     B1V 3 0
13 GSC 08151-00062 * 08 43 46.8698820408 -46 06 39.058694496     14.2     B3V 4 0
14 2MASS J08434760-4600562 * 08 43 47.6071996728 -46 00 56.210445396           ~ 1 0
15 TYC 8151-1072-1 * 08 43 48.7934027616 -46 07 33.713704812   12.64 12.66     ~ 7 0
16 CPD-45 2920 EB* 08 43 49.8047993256 -46 07 08.757379416 10.6 11.36 10.99 10.91   O6.5V(n)((f)) 39 1
17 CD-45 4462 ** 08 43 51.0870877776 -46 03 46.278754344 11.31 11.87 11.36 11.30   OB- 15 0
18 LS 1140 * 08 44 04.5156801816 -45 53 15.934366680 12.06 12.38 11.65 11.45   OB+ 12 0
19 2MASS J08440715-4601548 * 08 44 07.1562622776 -46 01 54.852845304           ~ 1 0
20 IRAS 08426-4601 HII 08 44 17.6 -46 12 05           ~ 5 0
21 GSC 08151-04830 * 08 44 23.2491123984 -46 08 19.197916080 14.02 14.43 13.71 13.61   ~ 3 0
22 CD-45 4472 * 08 44 25.0614061680 -45 53 34.556812908 11.45 11.90 11.29 11.21   OB 15 0
23 Cl Bochum 7 OpC 08 44 28.2 -45 55 19   6.94 6.8     ~ 52 0
24 GSC 08151-03643 EB* 08 44 31.6251327552 -45 53 14.850040668     13.5     B2III: 5 0
25 CPD-45 2951 * 08 44 39.0789299976 -46 07 45.034469076   12.14 12.13     B5V 8 0
26 2MASS J08444228-4609013 * 08 44 42.2811214392 -46 09 01.386068400           ~ 1 0
27 CD-45 4482 WR* 08 44 47.2901340000 -45 58 55.417387548 10.95 11.29 10.74 10.58   WN8h+? 108 0
28 CPD-45 2961 * 08 44 51.0383617176 -46 10 10.760075112 11.55 12.07 11.53 11.45   OB 13 0
29 2MASS J08450226-4607572 * 08 45 02.2579920456 -46 07 57.204015636           ~ 1 0
30 CD-45 4494 Em* 08 45 06.4409226072 -46 09 04.631970636 11.57 12.03 11.44 11.21   B1Ve 18 0
31 GSC 08151-04203 * 08 45 18.2204746584 -45 58 16.691091060     13.6     B0.5V 3 0
32 2MASS J08451829-4600418 * 08 45 18.2920540704 -46 00 41.826205620           ~ 3 0
33 UCAC2 12177291 * 08 45 18.8876864160 -45 41 49.433184240     14.8     B5V 3 0
34 2MASS J08451895-4600221 * 08 45 18.9491032464 -46 00 22.148067960           ~ 1 0
35 2MASS J08453526-4600351 * 08 45 35.2633097664 -46 00 35.199286092           ~ 1 0
36 2MASS J08453890-4557364 * 08 45 38.8987824048 -45 57 36.529838532           ~ 1 0
37 2MASS J08454120-4611127 * 08 45 41.1982208472 -46 11 12.691969728           ~ 1 0
38 Ass Vel OB 1 As* 08 49.9 -45 00           ~ 104 0
39 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
40 NAME Puppis Window reg ~ ~           ~ 9 0

To bookmark this query, right click on this link: simbad:objects in 2018A&A...616A..40C and select 'bookmark this link' or equivalent in the popup menu