2012A&A...544A..95G


Query : 2012A&A...544A..95G

2012A&A...544A..95G - Astronomy and Astrophysics, volume 544A, 95-95 (2012/8-1)

New carbon stars found in the Digitized First Byurakan Survey.

GIGOYAN K.S., RUSSEIL D., MICKAELIAN A.M., SARKISSIAN A. and AVTANDILYAN M.G.

Abstract (from CDS):

Faint high-latitude carbon stars (FHLCs) are distant, luminous giants. For this reason, they are often used to study the dynamical and chemical properties of the Galactic Halo. However, a more accurate investigation of photometric and spectroscopic surveys has revealed an increasing number of such objects with luminosities of main sequence stars. We report the first results of a systematic search of FHLCs using the Digitized First Byurakan Survey (DFBS) low-resolution spectral database. The DFBS low-resolution spectral plates are analysed to find new faint early and late-type carbon star candidates. Twenty new faint high-latitude carbon star candidates have been detected in an area of ∼4030sq.deg. Moderate-resolution slit spectroscopy was carried out for all candidates, confirming the carbon star nature for thirteen of them (nine are new discoveries), while the remaining objects are M-type stars. The carbon star sample consists of five N-type carbon stars, for which the estimated mass-loss rates agree well with the typical ones found for such carbon stars; five comparatively bright CH-type carbon stars; and three are probably dwarf carbon (dC) stars. The distance determination indicates that the dC stars belong to the thin disk, while the other stars belong the Galactic halo. These results demonstrate that one can efficiently find new faint high-latitude carbon stars in the DFBS database.

Abstract Copyright:

Journal keyword(s): stars: carbon - methods: observational - Galaxy: stellar content

Nomenclature: Table 1:DFBS JHHMMSS.ss+DDMMSS.s N=13

Simbad objects: 20

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Number of rows : 20
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 DFBS J003700.13+342234.0 Pe* 00 37 00.1337133504 +34 22 33.500319420   14.22 12.29 11.27   C-H 3 0
2 DFBS J004619.15+354537.3 Pe* 00 46 19.1677576416 +35 45 37.133460252   15.20 13.61 13.00   C-H 4 0
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10536 1
4 [WWV2004] J0200089+413747 C* 02 00 08.9114398776 +41 37 47.507018448   16.8 14.93 14.4   C-N 7 0
5 NAME Sagittarius Stream St* 02 22 +00.0           ~ 800 0
6 IRAS 03257+4443 C* 03 29 12.8113260528 +44 53 29.411874636   19.20 15.06 13.50   C-N 3 0
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16522 1
8 IRAS 06435+7419 C* 06 49 58.4536545168 +74 16 10.686428976   18.59 15.62 12.42   C-N 7 0
9 PG 0824+289 WD* 08 27 05.0512752687 +28 44 02.778910836   14.73 14.27     DA+dC 71 0
10 CLS 29 Pe* 10 40 06.3718957968 +35 48 02.378242116     15.0     Ce-CH 11 0
11 NAME KA 2 Pe* 11 19 03.9051903288 -16 44 49.276940712   17.071 15.538 15.327 14.097 dC0,1_CH? 14 0
12 DFBS J115153.56+412232.9 Pe* 11 51 53.5537996440 +41 22 32.672353008   14.65 13.25 12.57   C-H 2 0
13 DFBS J135831.62+671042.7 Pe* 13 58 31.5994694904 +67 10 42.427565436   15.22 13.62 12.93   C-H 1 0
14 DFBS J145241.15+785923.8 Pe* 14 52 41.1094006896 +78 59 23.652760236   15.65 13.51 13.08   C-H 1 0
15 DFBS J172734.59+651110.4 Pe* 17 27 34.5438971256 +65 11 10.137093288   13.72 12.32 11.78   C-H 2 0
16 IRAS F17289+7010 C* 17 28 25.7502931824 +70 08 29.955809724   17.91 14.29 14.14   C-N 8 0
17 NAME SDG G 18 55 03.1 -30 28 42   4.5 3.6     ~ 2037 2
18 TYC 3132-1630-1 RG* 19 00 34.6026945192 +44 08 28.947334092   13.15 12.10 11.06   C-H 17 0
19 [WWV2004] J2308354+403534 C* 23 08 35.0957272224 +40 35 34.406989908   16.36 14.35 13.42   C-N 8 0
20 DFBS J234043.43+353104.4 C* 23 40 43.4395604856 +35 31 04.199594844   16.11 14.24 13.36   C-H 2 0

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2023.02.02-18:59:12

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