2001A&A...371..222K


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.14CET15:27:19

2001A&A...371..222K - Astronomy and Astrophysics, volume 371, 222-232 (2001/5-3)

Reprocessing the Hipparcos data for evolved giant stars. II. Absolute magnitudes for the R-type carbon stars.

KNAPP G., POURBAIX D. and JORISSEN A.

Abstract (from CDS):

The Hipparcos Intermediate Astrometric Data for carbon stars have been reprocessed using an algorithm which provides an objective criterion for rejecting anomalous data points and constrains the parallax to be positive. New parallax solutions have been derived for 317 cool carbon stars, mostly of types R and N. In this paper we discuss the results for the R stars. The most important result is that the early R stars (i.e., R0-R3) have absolute magnitudes and V-K colors locating them among red clump giants in the Hertzsprung-Russell diagram. The average absolute magnitude MK for early R-type stars (with V-K<4) has been derived from a Monte-Carlo simulation implicitly incorporating all possible biases. It appears that the simulated magnitude distribution for a population with a true Gaussian distribution of mean MK=-2.0 and intrinsic standard deviation 1.0 mag provides a satisfactory match to the observed distribution. These values are consistent with the average absolute magnitude MK=-1.6 for clump red giants in the solar neighborhood (Alves, 2000ApJ...539..732A). Further, early R-type stars are non-variable, and their infrared photometric properties show that they are not undergoing mass loss, properties similar to those of the red clump giants. Stars with subtypes R4-R9 tend to be cooler and have similar luminosity to the N-type carbon stars, as confirmed by their position in the (J-H, H-K) color-color diagram. The sample of early R-type stars selected from the Hipparcos Catalogue appears to be approximately complete to magnitude K0∼7, translating into a completeness distance of 600pc if all R stars had MK=-2 (400pc if MK=-1). With about 30 early R-type stars in that volume, they comprise about 0.04% (0.14% for MK=-1) of the red clump stars in the solar neighborhood. Identification with the red clump locates these stars at the helium core burning stage of stellar evolution, while the N stars are on the asymptotic giant branch, where helium shell burning occurs. The present analysis suggests that for a small fraction of the helium core burning stars (far lower than the fraction of helium shell-burning stars), carbon produced in the interior is mixed to the atmosphere in sufficient quantities to form a carbon star.

Abstract Copyright:

Journal keyword(s): stars: carbon - stars: horizontal branch - astrometry - stars: distance - Hertzsprung-Russell diagram

Simbad objects: 83

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Number of rows : 83

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 BD+21 64 C* 00 34 16.2267647571 +22 24 48.372778383   10.97 9.65     C3,3 25 0
2 HD 7526 C* 01 14 32.4131622981 -48 15 07.420458518   11.28 10.00     C 18 0
3 BD-19 290 C* 01 40 34.1071883538 -18 56 51.521034947   12.41 11.07 10.361 9.783 C1,3 21 0
4 BD-08 456 Pe* 02 28 23.1523676476 -07 21 53.937996510   11.3 9.55     C4:,0+_CH3 18 0
5 HD 16115 Pe* 02 35 06.4987962466 -09 26 34.128548303   9.36 8.15     C-H3II: 69 0
6 HD 24281 C* 03 50 05.8560284710 -43 32 03.530973152   10.09 8.29     C-H4:IIIa: 23 0
7 HD 286436 C* 03 58 27.2109793587 +11 54 20.827871997   11.8 10.2     C4,3 19 0
8 BD+23 601 C* 04 00 19.2620860984 +23 32 03.425287628   11.8 10.5     C3,3J 21 0
9 C* 179 Pe* 04 04 53.3588102834 +23 14 10.694321260   11.99 10.71     C3,0_CH3 16 0
10 HD 26667 C* 04 07 47.4486953363 -69 47 15.698531561   11.82 10.65     C 16 0
11 BD-16 1217 Pe* 05 42 54.7500630024 -16 46 16.466474324   11.22 10.01     K0.5IIIa_CN2 17 0
12 BD+33 1194 C* 05 57 08.6478620511 +33 51 36.318459700   11.9 10.4     C2,3 18 0
13 HD 48733 C* 06 38 12.9129805068 -70 05 39.561182737   10.75 9.36     C 14 0
14 V* KY CMa C* 06 53 01.9649562164 -31 46 50.702896255   12.74 10.62     C 14 0
15 V* RU Cam WV* 07 21 44.1178182168 +69 40 14.725818530   9.95 8.60 8.84   C0,1_CH4 139 0
16 HD 57884 C* 07 23 06.9953471416 -04 12 48.792585986   11.7 9.0     C4+,3 38 0
17 HD 58364 C* 07 26 06.5091877697 +21 53 28.210774102   10.67 9.23     C4,3p 32 0
18 V* NQ Gem Sy* 07 31 54.5215639809 +24 30 12.543689289   10.19 8.01     C6,2_CH3 88 0
19 C* 978 C* 08 00 12.2183391435 -04 45 28.452084499   13.16 11.21     C2:,2: 13 0
20 CD-34 4517 C* 08 14 35.4152641806 -34 39 56.958430246   13.16 11.37     R 7 0
21 V* R Pyx C* 08 45 30.70376 -28 12 02.7986   15.73 10.73 9.70   C 41 0
22 HD 76846 C* 08 59 48.9396845173 +33 46 26.480401028   10.71 9.42     C-R2+IIIa: 47 0
23 HD 78278 C* 09 07 57.1211668545 +21 35 12.814052900   12.11 10.59     C3,4J 25 0
24 HD 85066 Pe* 09 51 05.3534057277 +52 37 25.438020119   11.48 9.72     C2,3_CH5 31 0
25 HD 88627 Pe* 10 17 36.6531863395 +77 06 43.613751057   12.35 10.83     C3,5_CH5 19 0
26 HD 90395 C* 10 24 59.6547258696 -50 24 27.660599396   10.76 9.49     C 21 0
27 V* TZ Car C* 10 46 03.0083237895 -65 36 52.708238304   11.1 10.20     C-R4III: 35 0
28 BD-18 3055 C* 10 54 41.8902107035 -19 23 21.710589391   11.7 10.6     C2,1 17 0
29 BD+16 2188 Pe* 10 56 57.8562802750 +15 16 46.344827631   11.4 10.11     C3,1_CH4 33 0
30 HD 95405 Pe* 11 00 34.3229633567 -25 51 22.941296996   9.51 8.33     C2,0_CH4 30 0
31 BD+41 2150 Pe* 11 00 48.5529266718 +40 42 10.557451801   11.2 10.03     C3,1_CH3_Ba4 22 0
32 HD 97578 C* 11 13 12.3222555485 -48 13 30.206598729   11.6 10.06     C-J4 20 0
33 BD+02 2446 Pe* 11 33 49.0531855871 +01 45 08.058672773   11.46 10.17 10.04   C3,3_CH4 26 0
34 BD+71 600 Pe* 12 03 24.9815946000 +70 25 55.695015427   11.4 10.15     C2,3_CH4 25 0
35 V* S Cen C* 12 24 33.9187290505 -49 26 24.724612836 11.92 9.45 7.60     C-R4 44 0
36 V* RU Vir C* 12 47 18.4075712853 +04 08 41.364022128   14.75 9.00     C8,1e 163 0
37 HD 112127 C* 12 53 55.7454142679 +26 46 47.984571519 9.56 8.14 6.88 5.97 5.39 C-R4IIIb 136 0
38 HD 113801 C* 13 06 24.8036268272 -20 03 31.474584180 10.72 9.67 8.50 7.76 7.24 C-R3III 46 0
39 BD+04 2735 C* 13 23 15.7167994760 +03 43 47.412712899   11.10 9.64     C1,1 18 0
40 V* V971 Cen C* 13 32 41.6659404437 -53 49 51.495607382   10.61 8.51     C-R2+III 19 0
41 CD-40 7992 C* 13 35 30.4917660783 -41 18 20.494047776   12.6 14.548     C 8 0
42 HD 122547 Pe* 14 01 55.4736794820 +32 49 33.305594078 11.72 10.77 9.54 8.70 8.07 C3,3_CH4 46 0
43 HD 123821 C* 14 08 27.4530942087 +51 35 32.530258751   9.68 8.63     C-R2IIIa 30 0
44 SOPS IV e-25 C* 14 36 54.7920985545 -30 13 04.201996271           R 6 1
45 BD+83 442 Pe* 15 06 50.0137961086 +82 45 23.066446557   11.02 9.97     C2,0+_CH3 16 0
46 V* S Aps RC* 15 09 24.5362175909 -72 03 45.183589120 11.52 10.86 9.60     C 109 0
47 BD+30 2637 Pe* 15 17 32.1334999390 +29 36 10.231110727   10.78 9.74     C3,0+_CH4 22 0
48 BD+65 1055 Pe* 15 27 54.7049634081 +65 22 39.986201820 13.30 11.80 10.34 9.22 8.31 C4:,4_CH4 25 1
49 SOPS IV e-82 C* 15 28 27.9350636385 -43 59 41.459191583   12.96 11.70     R 7 0
50 V* RT Nor RC* 16 24 18.6673601503 -59 20 38.565873502   11.34 10.60     R 70 0
51 BD+19 3109 Pe* 16 29 26.9948289913 +19 30 34.469607826 13.16 11.88 10.29 9.875 8.78 C1,1_CH4 33 0
52 BD+23 2998 C* 16 47 24.6712929288 +23 12 57.473419364 12.13 11.00 9.80 9.00 8.43 C-R3IIIa: 36 0
53 HD 156074 C* 17 13 31.2406466799 +42 06 22.767557235 9.67 8.75 7.61 6.89 6.42 C-R2III 117 0
54 HD 319738 C* 17 23 44.3372009597 -36 29 11.173575728   11.16 9.54     R3 16 0
55 BD+02 3336 C* 17 31 23.2569673761 +01 58 33.159188589 13.34 11.31 9.40 8.12 7.14 C-N5III: 43 0
56 BD+17 3325 Pe* 17 45 42.7802627067 +17 12 51.674961613 11.04 9.91 8.73 7.92 7.33 C2,0+_CH4: 30 0
57 HD 163838 C* 17 53 42.4856436618 +64 06 56.613885739   11.84 10.72     C2,2 26 0
58 V* W CrA C* 18 05 12.2407016902 -39 20 32.525329601   11.63 9.91     R3 28 0
59 C* 2551 C* 18 12 38.8535746811 +14 55 35.519120738   12.01 10.71     R5 18 0
60 V* RS Tel RC* 18 18 51.2223388862 -46 32 53.427215463   10.80 9.96     R0 70 1
61 LEE 117 C* 18 24 18.1323938279 +06 02 45.164400276   12.93 11.74     R0 14 0
62 HD 170282 C* 18 30 15.1814196372 -38 25 01.090034895   11.34 9.88     C4,4 18 0
63 V* RV Sct C* 18 44 25.1719620626 -13 12 47.663588883   12.46 9.94     C-R4+ 31 0
64 V* V CrA RC* 18 47 32.3131482 -38 09 32.324962   10.67 8.30     R0 97 0
65 V* SV Sge RC* 19 08 11.7739097448 +17 37 41.166662185           R2 60 0
66 HD 178316 C* 19 08 49.9621850716 -17 15 55.498461152   11.72 10.32     R2 17 0
67 HD 187216 Pe* 19 24 18.3451130483 +85 21 57.185833557   11.2 9.56     C3,3_CH5: 67 2
68 Case 286 C* 19 24 36.2750968608 +30 39 07.766041176   12.06 10.67     C 14 0
69 HD 333026 C* 19 55 40.0781660335 +28 24 40.930465045   11.30 9.51     R0 11 0
70 HD 188934 C* 19 57 37.6203951199 +00 14 30.208070762 13.48 11.38 9.37 7.97 7.00 C3,1 31 0
71 BD+57 2161 Pe* 20 14 07.7503937767 +58 06 19.420419723   11.3 9.68     C4,1_CH3_Ba4 25 0
72 HD 198140 C* 20 48 56.8367217758 -19 01 09.059456991   11.46 10.14     R1 21 0
73 HD 201266 C* 21 10 20.5754340726 -53 42 14.305582476   11.29 9.79     C 15 0
74 HD 202851 Pe* 21 18 43.4852973493 -01 32 03.339964535   10.89 9.67     C3,1_CH4_Ba3 28 0
75 BD+02 4338 C* 21 19 02.5556614013 +03 14 31.036447780   11.1 9.78     C3,2 26 0
76 V* BU Ind C* 21 44 31.1928558408 -65 03 33.873716992   11.46 10.07     C 14 0
77 V* LW Cyg C* 21 55 13.7693675476 +50 29 49.739740954   13.39 12.30     C5,4e: 59 0
78 V* CT Lac C* 22 06 39.9283608007 +48 27 06.858851962   13.24 10.60     C6-,4 34 0
79 HD 216649 C* 22 54 46.4913001435 -06 57 50.624952657   11.96 10.75     R3 19 0
80 V* VY And C* 23 01 49.4655132146 +45 53 09.109460141   13.26 9.60     C3,5J 53 0
81 HD 218851 C* 23 10 46.1771146132 +46 18 10.663163485   11.23 9.93     C2,2 23 0
82 HD 218875 C* 23 11 36.1373367083 -21 00 10.961762149   10.56 9.32     C3:,3 24 0
83 HD 223392 C* 23 49 05.4854759768 +06 22 56.645444133   9.87 8.50     C-R3III: 44 0

    Equat.    Gal    SGal    Ecl

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2019.12.14-15:27:19

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