2011A&A...529A.118T


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST06:03:55

2011A&A...529A.118T - Astronomy and Astrophysics, volume 529A, 118-118 (2011/5-1)

New R Coronae Borealis stars discovered in OGLE-III Galactic bulge fields from their mid- and near-infrared properties.

TISSERAND P., WYRZYKOWSKI L., WOOD P.R., UDALSKI A., SZYMANSKI M.K., KUBIAK M., PIETRZYNSKI G., SOSZYNSKI I., SZEWCZYK O., ULACZYK K. and POLESKI R.

Abstract (from CDS):

An R Coronae Borealis (RCB) star is a rare type of supergiant star that is increasingly suspected to be the evolved merger product of two white dwarfs. Lately, many RCBs have been found distributed in a thin disk structure embedded inside the Galactic bulge. This unexpectedly high density may provide additional insight into the nature and age of RCB stars. We apply and test a new technique to find RCB stars based on their particular infrared emission due to circumstellar shell. We attempt to demonstrate that RCB stars can be identified without performing a light curve analysis, which would simplified the search outside optically monitored fields. We selected RCB candidates based on their near-infrared excess and on their particular mid-infrared shells emission, using photometric data from the 2MASS and Spitzer/GLIMPSE surveys. Each candidates OGLE light curves were then visually inspected and we selected for spectroscopy follow-up those that underwent large and rapid declines. We discover two new R Coronae Borealis stars, but also indicate four new possible candidates. We emphasize that all of the 7 known RCB stars located in both the Spitzer/GLIMPSE and OGLE-III fields were also re-discovered, which illustrates the high efficiency of our analysis. The proposed new technique to find RCB stars has been successful. It can now be extended to larger areas, in particular where the interstellar extinction is too high to be monitored by optical microlensing surveys, such as the inner part of the Galactic bulge.

Abstract Copyright:

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

Nomenclature: Table 3: [TWW2011] OGLE-GC-RCB-N (Nos 1-2), [TWW2011] OGLE-GC-RCB-Cand-N (Nos 1-2), [TWW2011] GLIMPSE-RCB-Cand-N (Nos 1-2).

Simbad objects: 38

goto Full paper

goto View the reference in ADS

Number of rows : 38

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9446 1
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5669 1
3 SP77 39-12 RC* 05 10 28.5330562394 -69 47 04.495447732 19.187 19.396 14.20 13.62 13.22 C2,2Hd 13 0
4 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14832 1
5 V* W Men RC* 05 26 24.5311698897 -71 11 11.797841247     13.40   13.323 F5I:/C 49 0
6 SP77 55-17 C* 05 41 23.4960170413 -70 58 01.755387386     14.92 14.87 13.976 C 10 1
7 V* R CrB RC* 15 48 34.4147978750 +28 09 24.298218765 6.44 6.31 5.71 5.26 5.08 G0Iep 758 0
8 SV* HV 7863 RC* 17 15 19.7316982033 -29 05 37.405331734           R0 32 0
9 V* V2552 Oph RC* 17 23 14.5547946109 -22 52 06.318141177   11.90 10.92     C-Hd 24 0
10 V* V532 Oph RC* 17 32 42.6073338365 -21 51 40.760675423         16.56 ~ 15 0
11 Terz V 2637 RC? 17 35 18.1102495182 -26 53 49.239142601           ~ 3 0
12 IRAS 17321-2652 IR 17 35 18.6 -26 54 11           ~ 1 0
13 IRAS 17424-2331 RC* 17 45 31.41 -23 32 24.4           ~ 5 0
14 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11542 0
15 EROS2-star cg0715n14430 RC* 17 46 00.3386941253 -33 47 56.688102175           ~ 5 0
16 UCAC2 21602821 RC* 17 46 45.9119208413 -25 03 14.122281084       15.23 12.54 ~ 3 1
17 2MASS J17484156-2300267 RC* 17 48 41.57 -23 00 26.7           ~ 5 0
18 OGLE BLG-LPV-72399 LP* 17 51 19.503 -32 43 21.60     21.651   16.862 ~ 3 1
19 OGLE BUL-SC37 133492 RC* 17 52 14.9161664129 -29 38 30.387512694         15.24 ~ 3 1
20 EROS2-star cg0030l3740 RC* 17 52 20.0389531715 -29 03 31.692571714           ~ 6 0
21 NAME OGLE GC-RCB-2 RC* 17 53 57.0684624097 -29 31 42.865917547           ~ 4 1
22 2MASS J17574999-1825229 RC* 17 57 50.0038666116 -18 25 22.928127277         13.66 ~ 3 1
23 MACHO 401.48170.2237 Lev 17 57 59.02 -28 18 13.1           ~ 6 0
24 EROS2-star cg0062l18324 RC* 17 58 28.2965116419 -30 51 16.627010337           ~ 5 0
25 MACHO 176.19607.1138 RC* 18 01 58.2467523844 -27 36 48.398404305           ~ 5 0
26 IRAS 18001-2732 PM* 18 03 20.37 -27 32 24.2   25.2   13.7   ~ 3 0
27 HD 318952 C* 18 04 49.7408420721 -32 43 13.628518354   12.14 10.40     R0 20 0
28 V* WX CrA RC* 18 08 50.4873043636 -37 19 43.213621237   11.75 11.00     R5 59 0
29 V* V739 Sgr C* 18 13 10.5557837454 -30 16 14.732012871           R 16 0
30 IRAS 18100-2750 RC* 18 13 14.874 -27 49 41.04           ~ 5 0
31 V* V3795 Sgr RC* 18 13 23.564 -25 46 40.89       10.94 10.10 ~ 39 0
32 V* VZ Sgr RC* 18 15 08.5724567921 -29 42 29.495498613   11.15 10.46     ~ 46 0
33 MACHO 308.38099.66 RC* 18 19 27.4230477521 -21 24 08.204163505           ~ 7 0
34 MACHO 135.27132.51 RC* 18 19 33.7567911589 -28 35 58.073280647           ~ 10 0
35 V* GU Sgr RC* 18 24 15.5811837465 -24 15 26.353752591   11.40 11.33     R0 60 0
36 MACHO 301.45783.9 RC* 18 32 18.60 -13 10 49.6           ~ 7 0
37 V* V348 Sgr pA* 18 40 19.9270532749 -22 54 29.388019146   12.1       B0/1?I?e 173 0
38 NAME Galactic Bulge reg ~ ~           ~ 3391 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2011A&A...529A.118T and select 'bookmark this link' or equivalent in the popup menu


2020.07.13-06:03:55

© Université de Strasbourg/CNRS

    • Contact