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

Query : 2012AJ....144....2L

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

goto Full paper

goto View the references in ADS

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 - 2026 		#notes
1 LGGS J000153.17-152813.4 s*r 00 01 53.1859174726 -15 28 13.983021317   21 19.34 18.51   K0-1I 2 0
2 LGGS J000156.77-152839.6 s*r 00 01 56.7850342008 -15 28 40.176004872   19.55 17.61 16.62   K2-3I 2 0
3 LGGS J000156.87-153122.3 s*r 00 01 56.8860318936 -15 31 22.835895996   20.4 18.76 17.91   K0-1I 2 0
4 LGGS J000157.01-152954.0 s*r 00 01 57.0227304576 -15 29 54.594921480   20.34 18.70 17.85   K0-1I 2 0
5 LGGS J000157.55-152915.8 s*r 00 01 57.5634278986 -15 29 16.365531693   20.91 19.26 18.41 17.628 K0-1I 4 0
6 MCG-03-01-015 G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 782 2
7 LGGS J000157.96-152803.1 s*r 00 01 57.9695587056 -15 28 03.745821036   21.33 19.80 19.03   K0-1I 1 0
8 LGGS J000158.14-152332.2 s*r 00 01 58.1474564568 -15 23 32.587945692   21.33 19.61 18.62   M3I 2 0
9 LGGS J000158.74-152245.5 s*r 00 01 58.7459903496 -15 22 46.027082568   20.14 18.46 17.56   K0-1I 2 0
10 [SC85b] 4 s*r 00 01 59.6284627968 -15 31 00.488858520 22.31 20.20 18.97 18.07 17.25 K2-3I 8 0
11 [SC85b] 6 s*r 00 02 00.8368265016 -15 31 16.255453476 21.24 20.30 18.69 17.78 17.44 K0-1I 8 0
12 LGGS J000203.04-153033.7 s*r 00 02 03.0614444112 -15 30 34.264656252   20.66 18.67 17.64 16.698 K5I 4 0
13 NGC 11 AG? 00 08 42.494 +37 26 52.39   14.5       ~ 38 0
14 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
15 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
16 PMMR 101 s*r 00 59 35.0072940360 -72 04 06.426152436 15.64 14.70 12.84 11.83   M0Ia 38 0
17 SV* HV 11423 s*r 01 00 55.1621032296 -71 37 52.924954728   13.878 12.057     M0Iab 46 0
18 Cl* NGC 371 LE 29 s*r 01 03 02.4566119008 -72 01 53.002733736 17.09 16.98 14.03 13.48 11.693 K4.5-M4.5Ia-Iab 46 1
19 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
20 CD-28 595 PM* 01 54 50.2703221766 -27 28 35.739139915   12.06 11.51     ~ 138 0
21 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
22 WOH G 64 Mi* 04 55 10.5236094912 -68 20 30.019011036       15.69 12.795 M7.5(I)e 110 0
23 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
24 V* Z Dor s*r 05 38 16.0018297704 -69 10 11.237224368   16.798 15.037 12.49 11.367 M4Ia-Iab 43 0
25 CD-44 12736 PM* 18 36 25.9502475648 -44 18 36.907592904   10.83 10.22     G0 222 0
26 MCG-02-50-003 HII 19 44 34.38 -14 42 20.3           ~ 36 0
27 LGGS J194445.76-145221.2 s*r 19 44 45.7487554800 -14 52 21.777160296   19.93 17.71 16.5   M1I 7 0
28 LGGS J194447.56-145215.4 s*r 19 44 47.5549456272 -14 52 15.955698648   21.18 19.13 18.01   K5I 3 0
29 [K67] V32 s*r 19 44 47.7985307784 -14 50 53.058219072   20.74 19.80 17.22   M1I 10 0
30 LGGS J194449.62-145327.3 s?r 19 44 49.6089960360 -14 53 27.837876876   21.23 19.47 18.52   ~ 2 0
31 CW Red 7 s*r 19 44 49.9463219064 -14 43 33.874256100 22.37 20.28 18.07 16.78   K5I 7 0
32 [M98a] NGC 6822b-398 s*r 19 44 50.1146842224 -14 46 38.259880788   21.55 19.84 18.94   K5I 2 0
33 CW Red 16 s*r 19 44 50.4254397456 -14 44 10.421310516   20.46 18.46 17.41   M2I 6 0
34 LGGS J194451.78-144616.7 s?r 19 44 51.7766686728 -14 46 17.043175380   21.56 19.84 18.95   ~ 2 0
35 LGGS J194453.18-145406.5 s?r 19 44 53.1787467456 -14 54 07.100826444   21.43 19.60 18.62   ~ 3 0
36 CW Red 32 s*r 19 44 53.4546171264 -14 45 52.919048700   20.36 18.43 17.38   M4.5I 5 0
37 CW Red 30 s*r 19 44 53.4582328440 -14 45 40.484634624   20.88 19.14 18.17   K5I 7 0
38 LGGS J194453.66-144617.9 s?r 19 44 53.6564690328 -14 46 18.293520612   21.08 19.05 17.89   ~ 3 0
39 LGGS J194453.68-145245.8 s?r 19 44 53.6799967872 -14 52 46.452162180   21.06 19.25 18.28   ~ 2 0
40 CW Red 17 s*r 19 44 53.9514545352 -14 44 24.743092308 22.14 20.20 18.19 17.15   K5I 6 0
41 [K67] V23 s*r 19 44 54.4600983048 -14 48 06.584537880   20.56 19.30 17.35   M1I 12 0
42 [K67] C79 s*r 19 44 54.5381084952 -14 51 27.682568316 21.45 19.30 16.70 15.86   M0I 12 0
43 [H25] V14 s?r 19 44 54.8076352464 -14 43 48.151173072 19.99 20.29 19.20 16.77 15.47 M4I 13 0
44 LGGS J194454.86-145216.3 s?r 19 44 54.8568843331 -14 52 16.786065960   20.61 18.76 17.7   ~ 3 0
45 LGGS J194455.02-144607.1 s?r 19 44 55.0164939216 -14 46 07.488409440   21.36 19.46 18.47   ~ 2 0
46 [BSM2001] LB-f1-240 s?r 19 44 55.1925359636 -14 43 45.168350104   21.46 19.81 18.88   ~ 3 0
47 LGGS J194455.37-145229.2 s?r 19 44 55.3771064712 -14 52 29.698945140   21.06 19.27 18.3   ~ 2 0
48 [K67] V18 s*r 19 44 55.7030105832 -14 51 55.982495700 21.10 19.11 16.91 15.74   M0I 11 0
49 CW Red 44 s*r 19 44 55.9214074320 -14 47 19.982762484   21.43 19.56 18.52   K5I 5 0
50 LGGS J194455.97-145109.4 s?r 19 44 55.9722803544 -14 51 09.922768092   21.24 19.40 18.39   ~ 2 0
51 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1661 0
52 LGGS J194456.77-144927.0 s?r 19 44 56.7648133920 -14 49 27.538441608   21.52 19.87 18.99   ~ 1 0
53 LGGS J194457.10-145141.1 s?r 19 44 57.1009287408 -14 51 41.643770112   21.65 19.95 18.99   ~ 1 0
54 [K67] V19 s*r 19 44 57.3122956968 -14 49 20.594970300   19.69 17.41 16.20   M1I 14 0
55 LGGS J194457.38-145408.0 s?r 19 44 57.3772176912 -14 54 08.475324372   20.59 18.50 17.39   ~ 4 0
56 LGGS J194457.69-144953.1 s?r 19 44 57.6900064631 -14 49 53.691014649   20.98 19.13 18.13   ~ 1 0
57 LGGS J194457.96-144847.9 s?r 19 44 57.9530942016 -14 48 48.491239284   21.75 19.99 19.05   ~ 1 0
58 [K67] V31 LP* 19 44 58.1567644896 -14 44 56.426574300   20.38 20.00 17.2   ~ 7 0
59 LGGS J194458.17-144527.8 s?r 19 44 58.1625113808 -14 45 28.126539540   20.06 18.14 17.17   ~ 2 0
60 LGGS J194458.45-145458.8 s?r 19 44 58.4475751392 -14 54 59.311164924   21.13 19.55 18.72   ~ 2 0
61 LGGS J194458.64-145007.4 s?r 19 44 58.6283674848 -14 50 08.041100244   21.39 19.66 18.75   ~ 1 0
62 LGGS J194459.22-144955.0 s?r 19 44 59.2157245776 -14 49 55.548654600   21.49 19.76 18.82   ~ 2 0
63 LGGS J194459.41-145106.8 s?r 19 44 59.4071439048 -14 51 07.394412960   21.59 19.87 18.93   ~ 2 0
64 [K67] B110 s*r 19 44 59.8544243448 -14 45 15.766834788 20.74 18.93 16.93 15.93   M1I 8 0
65 LGGS J194500.10-144901.7 s?r 19 45 00.0969050544 -14 49 02.076189924   21.44 19.78 18.85   ~ 2 0
66 LGGS J194500.32-144104.8 s?r 19 45 00.3137857440 -14 41 05.079523092   20.23 18.24 17.18   ~ 4 0
67 LGGS J194500.40-145333.3 s?r 19 45 00.3948281664 -14 53 33.864363888   21.56 19.67 18.68   ~ 2 0
68 CW Red 50 s*r 19 45 00.5247829944 -14 48 26.890146900   20.84 18.75 17.52   M/KI 6 0
69 LGGS J194500.91-145234.3 s?r 19 45 00.9016643040 -14 52 34.841740152   21.23 19.45 18.48   ~ 2 0
70 LGGS J194501.12-145437.7 s?r 19 45 01.1144622072 -14 54 38.202530976   20.78 18.97 18   ~ 3 0
71 LGGS J194503.27-144224.5 s?r 19 45 03.2613368208 -14 42 24.829319196   21.61 19.90 18.98   ~ 2 0
72 LGGS J194503.58-144337.6 s*r 19 45 03.5729195136 -14 43 37.906824756   21.14 19.23 18.22   M0I 4 0
73 LGGS J194503.87-144247.6 s?r 19 45 03.8633512224 -14 42 47.909922516   22.01 19.95 18.83   ~ 2 0
74 LGGS J194504.29-145406.2 s?r 19 45 04.2844804224 -14 54 06.691488912   21.36 19.45 18.4   ~ 3 0
75 LGGS J194504.74-145422.8 s?r 19 45 04.7314906296 -14 54 23.291353260   21.56 19.86 18.94   ~ 3 0
76 LGGS J194505.74-145547.6 s?r 19 45 05.7362086846 -14 55 48.018573942   20.75 18.86 17.84   ~ 2 0
77 LGGS J194505.84-145517.3 s?r 19 45 05.8306666080 -14 55 17.747358888   20.7 18.93 17.97   ~ 3 0
78 LGGS J194506.34-145537.0 s?r 19 45 06.3356757480 -14 55 37.455475908   21.33 19.38 18.34   ~ 3 0
79 LGGS J194506.35-145135.5 s?r 19 45 06.3459074520 -14 51 36.081695124   21.22 19.15 18.01   ~ 3 0
80 LGGS J194507.48-145107.1 s?r 19 45 07.4671295328 -14 51 07.648149276   21.55 19.67 18.67   ~ 3 0
81 LGGS J194507.87-145435.9 s?r 19 45 07.8679193400 -14 54 36.371156724   21.63 19.82 18.88   ~ 3 0
82 [K67] V26 s?r 19 45 09.5448474840 -14 53 45.061709424   20.71 20.20 17.85   ~ 5 0
83 [BRC2005] V062 s?r 19 45 15.0888071256 -14 48 04.258217052   21.02 19.26 18.48   ~ 3 0
84 LP 877-23 PM* 22 52 41.0353986762 -20 35 32.994432457   13.02 11.90     ~ 119 0
85 NAME Local Group GrG ~ ~           ~ 9325 0

To bookmark this query, right click on this link: simbad:objects in 2012AJ....144....2L and select 'bookmark this link' or equivalent in the popup menu