2001ApJ...554..298A


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.05CET18:23:34

2001ApJ...554..298A - Astrophys. J., 554, 298-315 (2001/June-2)

The MACHO project LMC variable star inventory. X. The R Coronae Borealis stars.

ALCOCK C., ALLSMAN R.A., ALVES D.R., AXELROD T.S., BECKER A., BENNETT D.P., CLAYTON G.C., COOK K.H., DALAL N., DRAKE A.J., FREEMAN K.C., GEHA M., GORDON K.D., GRIEST K., KILKENNY D., LEHNER M.J., MARSHALL S.L., MINNITI D., MISSELT K.A., NELSON C.A., PETERSON B.A., POPOWSKI P., PRATT M.R., QUINN P.J., STUBBS C.W., SUTHERLAND W., TOMANEY A., VANDEHEI T. and WELCH D.L.

Abstract (from CDS):

We report the discovery of eight new R Coronae Borealis (RCB) stars in the Large Magellanic Cloud (LMC) using the MACHO project photometry database. The discovery of these new stars increases the number of known RCB stars in the LMC to thirteen. We have also discovered four stars similar to the Galactic variable DY Per. These stars decline much more slowly and are cooler than the RCB stars. The absolute luminosities of the Galactic RCB stars are unknown since there is no direct measurement of the distance to any Galactic RCB star. Hence, the importance of the LMC RCB stars. We find a much larger range of absolute magnitudes (MV=-2.5 to -5 mag) than inferred from the small pre-MACHO sample of LMC RCB stars. It is likely that there is a temperature-MV relationship with the cooler stars being intrinsically fainter. Cool (∼5000 K) RCB stars are much more common than previously thought based on the Galactic RCB star sample. Using the fairly complete sample of RCB stars discovered in the MACHO fields, we have estimated the likely number of RCB stars in the Galaxy to be ∼3200. The SMC MACHO fields were also searched for RCB stars, but none were found.

Abstract Copyright:

Journal keyword(s): Galaxies: Magellanic Clouds - Stars: Evolution - Stars: Variables: Other

Simbad objects: 30

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Number of rows : 30

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9710 1
2 V* DY Per RC* 02 35 17.1273531147 +56 08 44.719460598   12.88 11.09 9.93 8.64 C-R4+ 71 0
3 V* XX Cam RC* 04 08 38.7487746559 +53 21 39.349720481 8.35 8.10 7.27     F8I 131 0
4 SV* HV 12524 RC* 05 01 00.3784356885 -69 03 43.134917969     14.580   13.324 C 7 0
5 2MASS J05034465-6938117 LP* 05 03 44.6932874355 -69 38 11.625446526     17.52 14.245 16.292 ~ 6 0
6 SV* HV 5637 RC* 05 11 31.3801293503 -67 55 50.814263804     14.69 13.688 13.528 C 32 1
7 SV* HV 2379 RC* 05 14 46.1950295492 -67 55 47.643275135     16.31 15.132 13.427 ~ 19 0
8 OGLE LMC-RCB-8 RC* 05 15 51.792 -69 10 08.64     15.83 15.735 13.583 ~ 8 0
9 [KDM2001] 3071 C* 05 16 51.9478835782 -68 45 16.829954513     16.33 13.940 13.991 C 6 0
10 [KDM2001] 3353 C* 05 19 55.9438017753 -69 48 05.892229481     16.30 14.121 14.234 C 7 0
11 OGLE LMC-RCB-10 RC* 05 20 48.210 -70 12 12.54     17.912   14.943 ~ 10 0
12 SV* HV 942 RC* 05 21 47.9690816928 -70 09 57.094929354 16.748 18.233 15.247 14.04 14.209 ~ 14 1
13 OGLE LMC-RCB-12 RC* 05 22 57.3767347482 -68 58 18.890034326     17.58 16.285 14.223 C? 8 0
14 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15214 1
15 V* W Men RC* 05 26 24.5311698897 -71 11 11.797841247     13.40   13.323 F5I:/C 49 0
16 OGLE LMC-RCB-14 RC* 05 26 33.9217980818 -69 07 33.321432262     17.49 15.179 13.667 C 9 0
17 OGLE LMC-RCB-17 RC* 05 32 13.3507822573 -69 55 57.667484426     19.19 16.909 14.440 ~ 7 0
18 SV* HV 2671 RC* 05 33 48.935 -70 13 23.43     15.758   15.391 ~ 29 1
19 SV* HV 12842 RC* 05 45 02.8828477567 -64 24 22.722166684     13.7     ~ 24 1
20 SP77 55-23 C* 05 46 13.2797004509 -71 07 40.274672553     15.78 14.410 14.054 C 10 0
21 OGLE J054647.84-703813.9 RC* 05 46 47.7417724308 -70 38 13.426058422     15.74 13.910 13.410 C 9 0
22 LHA 120-S 63 Sy* 05 48 43.4317066086 -67 36 10.309133507   16.706 15.51 15.17 14.065 B8III[e] 43 0
23 V* V854 Cen RC* 14 34 49.4088471574 -39 33 19.276531885   7.13 11.69     Ce 201 0
24 V* S Aps RC* 15 09 24.5362175909 -72 03 45.183589120 11.52 10.86 9.60     C 112 0
25 V* R CrB RC* 15 48 34.4147978750 +28 09 24.298218765 6.44 6.31 5.71 5.26 5.08 G0Iep 762 0
26 V* V4334 Sgr NL* 17 52 32.69 -17 41 08.0   12.01       F2Ia 338 0
27 V* WX CrA RC* 18 08 50.4873043635 -37 19 43.213621237   11.75 11.00     R5 59 0
28 PN A66 58 PN 19 18 20.476 +01 46 59.62           [WC4] 293 0
29 Hen 1-5 pA* 20 11 56.064360 +20 20 04.17624 11.41 10.66 9.45     G8/K0Iae 493 0
30 V* U Aqr RC* 22 03 19.6991502652 -16 37 35.280449107   12.16 11.17     C-Hd 87 0

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2021.03.05-18:23:34

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