2003MNRAS.341..169B

Query : 2003MNRAS.341..169B

2003MNRAS.341..169B - Mon. Not. R. Astron. Soc., 341, 169-178 (2003/May-1)

Ruprecht 55: an OB association at the edge of our Galaxy.

BOSCH G., BARBA R., MORRELL N., NIEMELA V., OSTROV P., ARNAL M., CAPPA C., MORRAS R. and GIMENEZ DE CASTRO G.

Abstract (from CDS):

We present new spectroscopy in the optical range and 21-cm Hi data covering the Ruprecht 55 (Ru 55) field in the Puppis window where several authors have proposed the existence of one (or two) clusters.

We have determined new MK spectral types for about 50 stars in the region, finding 43 OB-type stars among them. LS 985 was found to be an O9 V + O9.5 III binary and it is the earliest type of star in our observed sample.

We have identified a stellar OB association (Ru 55), which is most likely related to a depletion detected in our Hi data, as: (i) they are located at the same distance (6 kpc), within observational errors; (ii) both have similar radial velocities (∼67 km.s–1); (iii) current OB stars could have provided the energy needed to blow the cavity; (iv) the dynamical time-scale for the hole buildup matches the age estimated for the earliest OB stars; and (v) LS 985 might be responsible for ionizing the Hi cavity inner walls close to it.


Abstract Copyright: 2003 RAS

Journal keyword(s): stars: early-type - ISM: bubbles - ISM: kinematics and dynamics - open clusters and associations: individual: Ruprecht 55 - Galaxy: structure

Simbad objects: 49

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Number of rows : 49
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 Per Arm PoG 03 30 +45.0           ~ 1672 0
2 CD-30 5559 Be* 08 04 28.5785030136 -30 58 21.310131000 9.91 10.64 10.38 10.41   Bepec 23 0
3 CD-32 4839 EB* 08 05 56.8465434072 -33 00 21.908955384 11.89 12.21 11.57 11.72   B2/4 14 0
4 UCAC4 284-030330 * 08 06 11.6584619664 -33 16 42.470854572 12.2 12.52 11.83 11.71   OB 10 0
5 ALS 15697 * 08 07 48.0 -32 24 07   14.25 13.37     B1V 8 0
6 [O92] 348 * 08 08 02.2642634904 -31 24 09.391391388   13.46 13.03     B3V 5 0
7 2MASS J08080283-3135460 * 08 08 02.8341720672 -31 35 46.185834588 13.12 13.46 12.83     B1IIIe 9 0
8 WRAY 15-162 Em* 08 08 03.9286028832 -32 13 28.988514156 13.22 13.42 12.45     Bpe 11 0
9 CD-32 4900 * 08 08 39.4825920888 -33 04 51.755538576 10.7 11.36 11.05 11.10   B1/2 14 0
10 2MASS J08085454-3148096 * 08 08 54.5418788208 -31 48 09.631789488 13.08 13.51 12.83     B2.5IVe 9 0
11 [O92] 359 * 08 08 56.0814688800 -32 11 55.457085840 14.21 14.39 13.87     B2.5IVe 9 0
12 GSC2 S13303211460 * 08 09 43.7007588720 -32 04 35.506997112 13.31 13.79 13.43     B2IV 6 0
13 CD-31 5607 * 08 09 46.5954638736 -32 14 50.448078060 11.22 11.77 11.52 11.71   B0/2 13 0
14 [O92] 368 * 08 09 58.3021741608 -32 32 28.032253908 13.81 14.12 13.42     B3/5V 7 0
15 2MASS J08101870-3107216 * 08 10 18.7099305432 -31 07 21.905140512     11.80     B2.5IIe 6 0
16 2MASS J08102946-3230216 * 08 10 29.4686426592 -32 30 21.661415892 13.15 13.63 13.20     B2IV 9 0
17 [O92] 379 cC* 08 10 48.6380987984 -32 22 27.744527028 13.51 13.604 13.018 13.078   B3/5III/Ve 6 0
18 ALS 15725 * 08 11 03.0 -32 46 10 13.7 14 13.45     B3III 7 0
19 [O92] 383 ** 08 11 09.8994317040 -32 33 57.784502736 12.63 13.17 12.91     B2III/V+B3 9 0
20 GSC2 S1330122143 * 08 11 22.6 -32 21 22   13.85 13.39     B2IV 2 0
21 GSC2 S1330122142 * 08 11 22.7 -32 21 24   13.71 13.41     B2IV 1 0
22 GSC2 S13303211827 * 08 11 30.1 -32 15 31   13.48 13.18     B2.5V 2 0
23 ALS 19503 * 08 11 35.5 -32 42 37 13.41 13.9 13.48     B2V 5 0
24 HD 68552 Em* 08 11 42.2386675632 -32 09 13.828617972 8.43 9.16 9.18 9.64   B5Ib/II 26 1
25 CD-31 5663 ** 08 11 43.78 -32 08 58.6   10.72 10.10     ~ 2 1
26 Cl* Ruprecht 55 DE 1 * 08 11 45.0461686152 -32 32 46.866183324 13.17 13.45 12.89     B2IV 10 0
27 [O92] 388 * 08 11 53.4177537744 -32 23 49.978747176 12.39 12.74 12.41     B3/5V 7 0
28 2MASS J08115384-3217528 * 08 11 53.8455157704 -32 17 52.874892024   13.27 12.52     G0V 1 0
29 CD-32 4967 * 08 12 10.1513417880 -32 34 05.260205424 8.46 9.88 9.30 9.18   B2.5Iab 31 0
30 Cl* Ruprecht 55 DE 4 * 08 12 10.4894579448 -32 30 28.326581172 13.37 13.77 13.47     B2Vne 7 0
31 CPD-32 2039 * 08 12 11.9509238664 -32 39 20.634692364 10.5 11.18 10.80 10.88   B1II 16 0
32 CPD-32 2038 Be* 08 12 12.5883373488 -32 28 15.055515876 10.85 11.52 11.16 11.30   B0IIIe 21 0
33 GSC2 S133012232510 * 08 12 13.8 -32 53 51   14.27 14.17     A0V 1 0
34 Cl Ruprecht 55 11 * 08 12 20.4235048848 -32 35 06.770769288 12.38 12.98 12.67     B1IV 10 0
35 TYC 7125-1900-1 * 08 12 20.9822319720 -32 47 32.343820512   11.64 11.59     B3V 3 0
36 CD-32 4971 * 08 12 21.0836900760 -32 35 03.335948268 10.51 11.00 10.70 10.97   B1IV 17 0
37 Cl Ruprecht 55 12 * 08 12 21.3729048528 -32 35 11.657081688 12.29 12.93 12.67     B1V 10 0
38 Cl* Ruprecht 55 DE 26 * 08 12 22.7983963608 -32 30 22.360193532   12.31 12.17     B9V 6 0
39 Cl* Ruprecht 55 DE 10 * 08 12 23.8990088424 -32 29 41.415422784   12.80 12.59     B9V 5 0
40 Cl Ruprecht 55 OpC 08 12 27 -32 35.0   8.14 7.8     ~ 55 1
41 CD-32 4977 * 08 12 27.1334493576 -32 39 42.273252864   11.40 11.37     B3V 5 0
42 CD-32 4978 * 08 12 32.5701788928 -32 34 35.063628816 10.53 11.15 10.82 10.83   B1IIe 16 0
43 CD-32 4983 * 08 12 44.4311855928 -32 38 53.643466428   11.06 11.03     B9V 5 0
44 LS 999 EB* 08 12 49.6896492432 -32 29 35.216274012 11.82 12.32 12.14 12.19 11.71 B3V+B5/7 20 0
45 TYC 7125-417-1 * 08 12 50.464 -32 17 12.94   12.66 12.70     B2.5V 3 0
46 LS 1003 * 08 12 58.1017600464 -32 34 45.730569396 11.34 11.95 11.70 11.80   OB- 11 0
47 GSC2 S1330122206 * 08 13 32.2474730832 -32 23 22.226060400 13.11 13.52 13.36     B2V 5 0
48 LS 1009 EB* 08 13 42.6007006128 -32 53 16.344162528 11.66 12.35 12.22 12.33   OB: 12 0
49 NAME Puppis Window reg ~ ~           ~ 9 0

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