2008A&A...481..673T


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.17CEST02:11:37

2008A&A...481..673T - Astronomy and Astrophysics, volume 481, 673-690 (2008/4-3)

R Coronae Borealis stars in the Galactic bulge discovered by EROS-2.

TISSERAND P., MARQUETTE J.B., WOOD P.R., LESQUOY E., BEAULIEU J.P., MILSZTAJN A., HAMADACHE C., AFONSO C., ALBERT J.N., ANDERSEN J., ANSARI R., AUBOURG E., BAREYRE P., CHARLOT X., COUTURES C., FERLET R., FOUQUE P., GLICENSTEIN J.F., GOLDMAN B., GOULD A., GROS M., HAISSINSKI J., DE KAT J., LE GUILLOU L., LOUP C., MAGNEVILLE C., MAURICE E., MAURY A., MONIEZ M., PALANQUE-DELABROUILLE N., PERDEREAU O., RAHAL Y., RICH J., SPIRO M., VIDAL-MADJAR A. and ZYLBERAJCH S.

Abstract (from CDS):

Rare types of variable stars may provide unique insight into short-lived stages of stellar evolution. The systematic monitoring of millions of stars and advanced light curve analysis techniques of microlensing surveys make them ideal for discovering such rare variable stars. One example is the R Coronae Borealis (RCB) stars, a rare type of evolved carbon-rich supergiant. We have conducted a systematic search of the EROS-2 database for the Galactic catalogue Bulge and spiral arms to find Galactic RCB stars. The light curves of ∼100 million stars, monitored for 6.7 years (from July 1996 to February 2003), have been analysed to search for the main signature of RCB stars, large and rapid drops in luminosity. Follow-up spectroscopy has been used to confirm the photometric candidates. We have discovered 14 new RCB stars, all in the direction of the Galactic Bulge, bringing the total number of confirmed Galactic RCB stars to about 51. After reddening correction, the colours and absolute magnitudes of at least 9 of the stars are similar to those of Magellanic RCB stars. This suggests that these stars are in fact located in the Galactic Bulge, making them the first RCB stars discovered in the Bulge. The localisation of the 5 remaining RCBs is more uncertain: 4 are either located behind the Bulge at an estimated maximum distance of 14kpc or have an unusual thick circumstellar shell; the other is a DY Per RCB which may be located in the Bulge, even if it is fainter than the known Magellanic DY Per. From the small scale height found using the 9 new Bulge RCBs, 61<hRCBBulge<246pc (95% C.L.), we conclude that the RCB stars follow a disk-like distribution inside the Bulge.

Abstract Copyright:

Journal keyword(s): stars: carbon - stars: AGB and post-AGB - supergiants - Galaxy: bulge

Nomenclature: Table 3, col(1): [TMW2008] EROS2-GC-RCB-NN (Nos 01-14). Table 3, col(2), Table 4, col(1): EROS2-star cgNNNNaNNNNN N=14+9.

Simbad objects: 66

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Number of rows : 66

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 MSX SMC 014 Mi* 00 46 16.33 -74 11 13.6         19.872 ~ 12 0
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9835 1
3 [TWM2009] EROS2-SMC-RCB-3 RC* 00 57 18.15 -72 42 35.2           ~ 14 0
4 V* DY Per RC* 02 35 17.1273531147 +56 08 44.719460598   12.88 11.09 9.93 8.64 C-R4+ 71 0
5 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5979 1
6 * alf Cet LP? 03 02 16.77307 +04 05 23.0596 6.10 4.17 2.53 1.18 0.02 M1.5IIIa 443 0
7 OGLE LMC-RCB-10 RC* 05 20 48.210 -70 12 12.54     17.912   14.943 ~ 10 0
8 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15426 1
9 V* W Men RC* 05 26 24.5311698897 -71 11 11.797841247     13.40   13.323 F5I:/C 49 0
10 SV* HV 2671 RC* 05 33 48.935 -70 13 23.43     15.758   15.391 ~ 29 1
11 SV* HV 12842 RC* 05 45 02.8828477567 -64 24 22.722166684     13.7     ~ 24 1
12 V* X Vel C* 09 55 26.1119127674 -41 35 12.790399779   10.29 10.30 7.13 8.80 C-N3 64 0
13 * tet Mus WR* 13 08 07.1527888825 -65 18 21.679641155 4.71 5.50 5.53 5.44 5.40 WC5+B0III 300 0
14 V* V854 Cen RC* 14 34 49.4088471574 -39 33 19.276531885   7.13 11.69     Ce 202 0
15 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
16 * gam Nor ** 16 18 -50.1           ~ 10 1
17 SV* HV 7863 RC* 17 15 19.7316982033 -29 05 37.405331734           R0 32 0
18 V* V1773 Oph RC* 17 17 22.3309288567 -20 22 38.712707940   17.9   16.37 17.03 F2III 8 0
19 EROS2-star cg1235m14181 RC* 17 19 58.5116676593 -30 04 21.509440467           ~ 5 0
20 V* V2552 Oph RC* 17 23 14.5547946109 -22 52 06.318141177   11.90 10.92     C-Hd 24 0
21 2MASS J17280784-2948140 V* 17 28 07.85 -29 48 14.0           M5 1 0
22 Terz V 1680 RC* 17 29 37.1093601799 -30 39 36.846700663           ~ 5 0
23 V* V1135 Sco Mi* 17 30 23.8451921613 -30 08 28.500151602           ~ 8 0
24 EROS2-star cg1076k13424 V* 17 33 26.21 -27 32 02.7           M2 1 0
25 EROS2-star cg1077m26188 V* 17 36 15.1316428080 -27 37 11.592876667           M6 1 0
26 Terz V 2960 RC* 17 39 20.7394909684 -27 57 22.683071425           ~ 6 0
27 IRAS 17424-2331 RC* 17 45 31.41 -23 32 24.4           ~ 5 0
28 NAME Galactic Center gam 17 45 39.60213 -29 00 22.0000           ~ 12257 0
29 ASAS J174600-2321.3 V* 17 46 00.1819670910 -23 21 16.358643382           F0I 4 0
30 EROS2-star cg0715n14430 RC* 17 46 00.3386941253 -33 47 56.688102175           ~ 5 0
31 EROS2-star cg1135m3139 V* 17 46 12.87 -23 49 44.2           M3 1 0
32 Terz V 2046 RC* 17 46 16.23 -32 57 40.9           ~ 5 0
33 2MASS J17483090-2422566 RC* 17 48 30.90 -24 22 56.7           ~ 4 0
34 2MASS J17484156-2300267 RC* 17 48 41.57 -23 00 26.7           ~ 5 0
35 EROS2-star cg0030l3740 RC* 17 52 20.0389531715 -29 03 31.692571714           ~ 6 0
36 V* V4334 Sgr CV* 17 52 32.69 -17 41 08.0   12.01       F2Ia 340 0
37 2MASS J17524872-2845190 RC* 17 52 48.72 -28 45 19.1           ~ 5 0
38 MACHO 401.48170.2237 Lev 17 57 59.02 -28 18 13.1           ~ 6 0
39 EROS2-star cg0062l18324 RC* 17 58 28.2965116419 -30 51 16.627010337           ~ 5 0
40 MACHO 118.18666.100 RC* 17 59 52.23 -29 39 50.5           ~ 4 0
41 MACHO 176.19607.1138 RC* 18 01 58.2467523844 -27 36 48.398404305           ~ 5 0
42 HD 318952 C* 18 04 49.7408420721 -32 43 13.628518354   12.14 10.40     R0 22 0
43 EROS2-star cg6126m5824 V* 18 05 30.4473575334 -31 53 24.312424759           M2 1 0
44 V* GM Ser RC* 18 08 35.8149137136 -15 04 01.885655099           M7 9 0
45 V* WX CrA RC* 18 08 50.4873043635 -37 19 43.213621237   11.75 11.00     R5 59 0
46 V* V739 Sgr C* 18 13 10.5557837454 -30 16 14.732012871           R 16 0
47 IRAS 18100-2750 RC* 18 13 14.874 -27 49 41.04           ~ 5 0
48 OGLE BLG-LPV-226511 Mi* 18 13 16.9658813484 -25 31 35.109285674     21.812   17.072 ~ 3 0
49 V* V3795 Sgr RC* 18 13 23.564 -25 46 40.89       10.94 10.10 ~ 40 0
50 V* VZ Sgr RC* 18 15 08.5724567921 -29 42 29.495498613   11.15 10.46     ~ 48 0
51 V* AM Her CV* 18 16 13.2546541781 +49 52 04.759861155     12.30     M4.5 919 0
52 MACHO 177.26016.56 Lev 18 16 54.22 -25 02 54.7           M5 1 0
53 MACHO 155.26433.492 * 18 18 15.10 -31 51 54.6           ~ 1 0
54 MACHO 308.38099.66 RC* 18 19 27.4230477521 -21 24 08.204163505           ~ 7 0
55 MACHO 135.27132.51 RC* 18 19 33.7567911589 -28 35 58.073280647           ~ 11 0
56 V* GU Sgr RC* 18 24 15.5811837465 -24 15 26.353752591   11.40 11.33     R0 60 0
57 * gam Sct * 18 29 11.8538827 -14 33 56.931865   4.739 4.675     A1IV/V 106 0
58 MACHO 301.45783.9 RC* 18 32 18.60 -13 10 49.6           ~ 7 0
59 V* V348 Sgr pA* 18 40 19.9270532749 -22 54 29.388019146   12.1       B0/1?I?e 176 0
60 * bet Sct SB* 18 47 10.4626934070 -04 44 52.363891614 6.15 5.31 4.22 3.43 2.86 G4IIa 181 0
61 V* RY Sgr RC* 19 16 32.7669543079 -33 31 20.337025534 6.20 6.27 6.25     Cpec 357 0
62 PN A66 58 PN 19 18 20.476 +01 46 59.62           [WC4] 293 0
63 V* ES Aql RC* 19 32 21.6146661742 -00 11 30.960387677     11.76     C 31 0
64 Hen 1-5 pA* 20 11 56.064360 +20 20 04.17624 11.41 10.66 9.45     G8/K0Iae 495 0
65 V* V1405 Cyg RC* 21 57 30.6116128465 +53 53 45.303162921     13.90     ~ 7 0
66 NAME Galactic Bulge reg ~ ~           ~ 3606 0

    Equat.    Gal    SGal    Ecl

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2021.06.17-02:11:37

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