2012AJ....144....2L


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.29CET21:03:21

2012AJ....144....2L - Astron. J., 144, 2 (2012/July-0)

Spectral types of red supergiants in NGC 6822 and the Wolf-Lundmark-Melotte galaxy.

LEVESQUE E.M. and MASSEY P.

Abstract (from CDS):

We present moderate-resolution spectroscopic observations of red supergiants (RSGs) in the low-metallicity Local Group galaxies NGC 6822 (Z = 0.4 Z) and Wolf-Lundmark-Melotte (WLM; Z = 0.1 Z). By combining these observations with reduction techniques for multislit data reduction and flux calibration, we are able to analyze spectroscopic data of 16 RSGs in NGC 6822 and spectrophotometric data of 11 RSGs in WLM. Using these observations, we determine spectral types for these massive stars, comparing them to Milky Way and Magellanic Cloud RSGs and thus extending observational evidence of the abundance-dependent shift of RSG spectral types to lower metallicities. In addition, we have uncovered two RSGs with unusually late spectral types (J000158.14-152332.2 in WLM, with a spectral type of M3 I, and J194453.46-144552.6 in NGC 6822, with a spectral type of M4.5 I) and a third RSG (J194449.96-144333.5 in NGC 6822) whose spectral type has varied from an M2.5 in 1997 to a K5 in 2008. All three of these stars could potentially be members of a recently discovered class of extreme RSG variables.

Abstract Copyright:

Journal keyword(s): Local Group - stars: variables: general - supergiants

Simbad objects: 85

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Number of rows : 85

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 LGGS J000153.17-152813.4 s*r 00 01 53.181 -15 28 13.92   21 19.34 18.51   K0-1I 1 0
2 LGGS J000156.77-152839.6 s*r 00 01 56.7848746758 -15 28 40.178713224   19.55 17.61 16.62   K2-3I 1 0
3 LGGS J000156.87-153122.3 s*r 00 01 56.8868565796 -15 31 22.839289507   20.4 18.76 17.91   K0-1I 1 0
4 LGGS J000157.01-152954.0 s*r 00 01 57.0233632273 -15 29 54.592890194   20.34 18.70 17.85   K0-1I 1 0
5 LGGS J000157.55-152915.8 s*r 00 01 57.545 -15 29 16.05   20.91 19.26 18.41   K0-1I 3 0
6 NAME WLM Galaxy G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 582 2
7 LGGS J000157.96-152803.1 s*r 00 01 57.9691859028 -15 28 03.742861285   21.33 19.80 19.03   K0-1I 1 0
8 LGGS J000158.14-152332.2 s*r 00 01 58.1461655858 -15 23 32.576653647   21.33 19.61 18.62   M3I 1 0
9 LGGS J000158.74-152245.5 s*r 00 01 58.7464128470 -15 22 46.026137884   20.14 18.46 17.56   K0-1I 1 0
10 [SC85b] 4 s*r 00 01 59.6283166710 -15 31 00.484858986 22.31 20.20 18.97 18.07 17.25 K2-3I 6 0
11 [SC85b] 6 s*r 00 02 00.8371767260 -15 31 16.250147565 21.24 20.30 18.69 17.78 17.44 K0-1I 6 0
12 LGGS J000203.04-153033.7 s*r 00 02 03.0613210946 -15 30 34.263495819   20.66 18.67 17.64   K5I 2 0
13 NGC 11 G 00 08 42.494 +37 26 52.39   14.5       ~ 28 0
14 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11057 1
15 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9564 1
16 PMMR 101 s*r 00 59 35.0072011577 -72 04 06.427995726 15.64 14.70 12.84 11.83   M0Ia 24 0
17 SV* HV 11423 s*r 01 00 55.1636196040 -71 37 52.923457713   13.878 12.057     M0Iab 31 0
18 Cl* NGC 371 LE 29 s*r 01 03 02.4560414762 -72 01 53.000449115 17.09 16.98 14.03 13.48 11.693 K4.5-M4.5Ia-Iab 32 1
19 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5197 1
20 CD-28 595 PM* 01 54 50.2704861570 -27 28 35.740415025   12.06 11.51     ~ 120 0
21 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5766 1
22 WOH G 64 Mi* 04 55 10.5252313969 -68 20 29.998470169     18.46 15.69 12.795 M7.5 82 0
23 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14998 1
24 V* Z Dor s*r 05 38 16.0015087290 -69 10 11.241078377   16.798 15.037 12.49 11.367 M4Ia-Iab 28 0
25 CD-44 12736 PM* 18 36 25.9487430436 -44 18 36.919462094   10.83 10.22     G0 196 0
26 MCG-02-50-003 HII 19 44 34.38 -14 42 20.3           ~ 32 0
27 LGGS J194445.76-145221.2 s*r 19 44 45.7489227645 -14 52 21.778752761   19.93 17.71 16.5   M1I 3 0
28 LGGS J194447.56-145215.4 s*r 19 44 47.5547624305 -14 52 15.957630233   21.18 19.13 18.01   K5I 2 0
29 [K67] V32 s*r 19 44 47.7989808607 -14 50 53.060519850   20.74 19.80 17.22   M1I 7 0
30 LGGS J194449.62-145327.3 s*r 19 44 49.6087503059 -14 53 27.843768926   21.23 19.47 18.52   ~ 1 0
31 CW Red 7 s*r 19 44 49.9467008150 -14 43 33.868665632 22.37 20.28 18.07 16.78   K5I 5 0
32 [M98a] NGC 6822b-398 s*r 19 44 50.1147918266 -14 46 38.248693199   21.55 19.84 18.94   K5I 2 0
33 LGGS J194450.44-144410.0 s*r 19 44 50.4256109560 -14 44 10.425250550   20.46 18.46 17.41   M2I 2 0
34 LGGS J194451.78-144616.7 s*r 19 44 51.7777445391 -14 46 17.050432288   21.56 19.84 18.95   ~ 1 0
35 LGGS J194453.18-145406.5 s*r 19 44 53.1778379019 -14 54 07.111212587   21.43 19.60 18.62   ~ 2 0
36 CW Red 32 s*r 19 44 53.4546336627 -14 45 52.918690706   20.36 18.43 17.38   M4.5I 4 0
37 CW Red 30 s*r 19 44 53.4584445630 -14 45 40.486907717   20.88 19.14 18.17   K5I 6 0
38 LGGS J194453.66-144617.9 s*r 19 44 53.6558814949 -14 46 18.301836106   21.08 19.05 17.89   ~ 2 0
39 LGGS J194453.68-145245.8 s*r 19 44 53.6802916508 -14 52 46.446562181   21.06 19.25 18.28   ~ 1 0
40 CW Red 17 s*r 19 44 53.9515079974 -14 44 24.746456574 22.14 20.20 18.19 17.15   K5I 5 0
41 [K67] V23 s*r 19 44 54.4604092277 -14 48 06.586930535   20.56 19.30 17.35   M1I 9 0
42 [K67] C79 s*r 19 44 54.5379546663 -14 51 27.686503524 21.45 19.30 16.70 15.86   M0I 10 0
43 [H25] V14 V* 19 44 54.8081657207 -14 43 48.146688459 19.99 20.29 19.20 16.77 15.47 ~ 10 0
44 LGGS J194454.86-145216.3 * 19 44 54.86 -14 52 16.3   20.61 18.76 17.7   ~ 1 0
45 LGGS J194455.02-144607.1 s*r 19 44 55.0161828330 -14 46 07.488070499   21.36 19.46 18.47   ~ 1 0
46 [BSM2001] LB-f1-240 s*r 19 44 55.189 -14 43 45.08   21.46 19.81 18.88   ~ 2 0
47 LGGS J194455.37-145229.2 s*r 19 44 55.3769110409 -14 52 29.705419948   21.06 19.27 18.3   ~ 1 0
48 [K67] V18 s*r 19 44 55.7030459588 -14 51 55.982792228 21.10 19.11 16.91 15.74   M0I 8 0
49 CW Red 44 s*r 19 44 55.9230008370 -14 47 19.954469984   21.43 19.56 18.52   K5I 5 0
50 LGGS J194455.97-145109.4 s*r 19 44 55.9721717570 -14 51 09.926642449   21.24 19.40 18.39   ~ 1 0
51 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1444 0
52 LGGS J194456.77-144927.0 s*r 19 44 56.7656084950 -14 49 27.546858738   21.52 19.87 18.99   ~ 1 0
53 LGGS J194457.10-145141.1 s*r 19 44 57.1008958511 -14 51 41.634486290   21.65 19.95 18.99   ~ 1 0
54 [K67] V19 s*r 19 44 57.3123813159 -14 49 20.595967688   19.69 17.41 16.20   M1I 12 0
55 LGGS J194457.38-145408.0 s*r 19 44 57.3775734067 -14 54 08.472036290   20.59 18.50 17.39   ~ 2 0
56 LGGS J194457.69-144953.1 s*r 19 44 57.689 -14 49 53.77   20.98 19.13 18.13   ~ 1 0
57 LGGS J194457.96-144847.9 s*r 19 44 57.9516152886 -14 48 48.509219424   21.75 19.99 19.05   ~ 1 0
58 [K67] V31 s*r 19 44 58.1570620440 -14 44 56.421267228   20.38 20.00 17.2   ~ 4 0
59 LGGS J194458.17-144527.8 s*r 19 44 58.1616823885 -14 45 28.135978856   20.06 18.14 17.17   ~ 1 0
60 LGGS J194458.45-145458.8 s*r 19 44 58.4475003024 -14 54 59.309277362   21.13 19.55 18.72   ~ 1 0
61 LGGS J194458.64-145007.4 s*r 19 44 58.6280456141 -14 50 08.037925497   21.39 19.66 18.75   ~ 1 0
62 LGGS J194459.22-144955.0 s*r 19 44 59.2150919895 -14 49 55.566888669   21.49 19.76 18.82   ~ 1 0
63 LGGS J194459.41-145106.8 s*r 19 44 59.4066057457 -14 51 07.408470374   21.59 19.87 18.93   ~ 1 0
64 [K67] B110 s*r 19 44 59.8542652686 -14 45 15.768944652 20.74 18.93 16.93 15.93   M1I 7 0
65 LGGS J194500.10-144901.7 s*r 19 45 00.0966707372 -14 49 02.093074027   21.44 19.78 18.85   ~ 1 0
66 LGGS J194500.32-144104.8 s*r 19 45 00.3135892149 -14 41 05.080350840   20.23 18.24 17.18   ~ 2 0
67 LGGS J194500.40-145333.3 s*r 19 45 00.3939712451 -14 53 33.876488693   21.56 19.67 18.68   ~ 1 0
68 CW Red 50 s*r 19 45 00.5248100913 -14 48 26.888654444   20.84 18.75 17.52   M/KI 4 0
69 LGGS J194500.91-145234.3 s*r 19 45 00.9019573495 -14 52 34.842537362   21.23 19.45 18.48   ~ 1 0
70 LGGS J194501.12-145437.7 s*r 19 45 01.1143901902 -14 54 38.196397778   20.78 18.97 18   ~ 1 0
71 LGGS J194503.27-144224.5 s*r 19 45 03.2615038003 -14 42 24.817715666   21.61 19.90 18.98   ~ 2 0
72 LGGS J194503.58-144337.6 s*r 19 45 03.5730754935 -14 43 37.915187196   21.14 19.23 18.22   M0I 3 0
73 LGGS J194503.87-144247.6 s*r 19 45 03.8631075199 -14 42 47.883171774   22.01 19.95 18.83   ~ 2 0
74 LGGS J194504.29-145406.2 s*r 19 45 04.2851182079 -14 54 06.679258253   21.36 19.45 18.4   ~ 2 0
75 LGGS J194504.74-145422.8 s*r 19 45 04.7320036586 -14 54 23.294716971   21.56 19.86 18.94   ~ 2 0
76 LGGS J194505.74-145547.6 s*r 19 45 05.737 -14 55 47.94   20.75 18.86 17.84   ~ 1 0
77 LGGS J194505.84-145517.3 s*r 19 45 05.8303184981 -14 55 17.750363678   20.7 18.93 17.97   ~ 1 0
78 LGGS J194506.34-145537.0 s*r 19 45 06.3357735291 -14 55 37.460347583   21.33 19.38 18.34   ~ 2 0
79 LGGS J194506.35-145135.5 s*r 19 45 06.3461328311 -14 51 36.089328999   21.22 19.15 18.01   ~ 2 0
80 LGGS J194507.48-145107.1 s*r 19 45 07.4670867834 -14 51 07.645259333   21.55 19.67 18.67   ~ 2 0
81 LGGS J194507.87-145435.9 s*r 19 45 07.8685426883 -14 54 36.360750203   21.63 19.82 18.88   ~ 2 0
82 [K67] V26 s*r 19 45 09.5442397150 -14 53 45.067751085   20.71 20.20 17.85   ~ 3 0
83 [BRC2005] V062 s*r 19 45 15.0887608195 -14 48 04.261878021   21.02 19.26 18.48   ~ 2 0
84 LP 877-23 PM* 22 52 41.0353308036 -20 35 32.995847106   13.02 11.90     ~ 104 0
85 NAME Local Group GrG ~ ~           ~ 7076 0

    Equat.    Gal    SGal    Ecl

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2020.10.29-21:03:21

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