2005AJ....130.2293Z

Query : 2005AJ....130.2293Z

2005AJ....130.2293Z - Astron. J., 130, 2293-2302 (2005/November-0)

Discovery of five new R Coronae Borealis stars in the MACHO Galactic Bulge database.

ZANIEWSKI A., CLAYTON G.C., WELCH D.L., GORDON K.D., MINNITI D. and COOK K.H.

Abstract (from CDS):

We have identified five new R Coronae Borealis (RCB) stars in the Galactic bulge using the MACHO Project photometry database, raising the total number of known Galactic RCB stars to about 40. We have obtained spectra to confirm the identifications. The fact that four out of the five newly identified RCB stars are ``cool'' (Teff<6000 K) rather than ``warm'' (Teff>6000 K) suggests that the preponderance of warm RCB stars among the existing sample is a selection bias. These cool RCB stars are redder and fainter than their warm counterparts and may have been missed in surveys done with blue plates. Based on the number of new RCB stars discovered in the MACHO bulge fields, there may be ∼250 RCB stars in the reddened ``exclusion'' zone toward the bulge.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Bulge - Stars: Evolution - Stars: Variables: Other

Simbad objects: 24

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Number of rows : 24
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 SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 SV* HV 5637 RC* 05 11 31.3800261672 -67 55 50.814148260     14.804   13.528 C 34 1
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
4 V* W Men RC* 05 26 24.5307101256 -71 11 11.796721620     13.40   13.323 F5I:/C 54 0
5 V* V854 Cen RC* 14 34 49.4024471640 -39 33 19.201288284   7.13 11.69     Ce 214 0
6 V* Z UMi RC* 15 02 01.3633505568 +83 03 48.629861424   12.54 11.40     C 60 0
7 V* S Aps RC* 15 09 24.5365973688 -72 03 45.182766996 11.52 10.86 9.60     C 124 0
8 V* V2552 Oph RC* 17 23 14.5548283752 -22 52 06.314546712   11.90 10.92     C-Hd 30 0
9 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
10 V* V4334 Sgr CV* 17 52 32.69352 -17 41 08.0160           F2Ia 390 0
11 MACHO 401.48170.2237 RC* 17 57 58.9348311759 -28 18 12.847306046       14.905   ~ 8 0
12 OGLE BLG-LPV-165924 RC* 17 59 52.2319818336 -29 39 50.510797668     17.851 15.935 12.852 ~ 6 0
13 V* V739 Sgr RC* 18 13 10.5556628976 -30 16 14.730832560           R 20 0
14 UCAC4 299-181934 * 18 13 13.1608216953 -30 15 50.886076704       12.522   ~ 1 0
15 V* V3795 Sgr RC* 18 13 23.5642449000 -25 46 40.857266928       10.940 10.10 ~ 48 0
16 V* VZ Sgr RC* 18 15 08.5724613648 -29 42 29.491053228   11.15 10.46     ~ 57 0
17 UCAC4 302-211186 * 18 15 09.1265791056 -29 42 29.105906724           ~ 1 0
18 MACHO 308.38099.66 RC* 18 19 27.4228855848 -21 24 08.199993852           ~ 9 0
19 MACHO 135.27132.51 RC* 18 19 33.7566032184 -28 35 58.074048060       13.934   ~ 11 0
20 MACHO 301.45783.9 RC* 18 32 18.5979046176 -13 10 49.624542444           ~ 8 0
21 PN A66 58 PN 19 18 20.476 +01 46 59.62           [WC4] 327 0
22 V* ES Aql RC* 19 32 21.6146259144 -00 11 30.957877284     11.76 12.12   C 45 0
23 Hen 1-5 pA* 20 11 56.0595568008 +20 20 04.420944132 11.41 10.66 9.45     G8/K0Iae 523 0
24 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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