2015ApJ...806...21D


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.15CEST22:38:25

2015ApJ...806...21D - Astrophys. J., 806, 21 (2015/June-2)

Red supergiants as cosmic abundance probes: the Magellanic Clouds.

DAVIES B., KUDRITZKI R.-P., GAZAK Z., PLEZ B., BERGEMANN M., EVANS C. and PATRICK L.

Abstract (from CDS):

Red Supergiants (RSGs) are cool (Å4000 K), highly luminous stars ( L), and are among the brightest near-IR sources in star-forming galaxies. This makes them powerful probes of the properties of their host galaxies, such as kinematics and chemical abundances. We have developed a technique whereby metallicities of RSGs may be extracted from a narrow spectral window around 1 µm from only moderate resolution data. The method is therefore extremely efficient, allowing stars at large distances to be studied, and so has tremendous potential for extragalactic abundance work. Here, we present an abundance study of the Large and Small Magellanic Clouds (LMC and SMC respectively) using samples of 9-10 RSGs in each. We find average abundances for the two galaxies of and (with respect to a solar metallicity of). These values are consistent with other studies of young stars in these galaxies, and though our result for the SMC may appear high it is consistent with recent studies of hot stars which find 0.5-0.8 dex below solar. Our best-fit temperatures are on the whole consistent with those from fits to the optical-infrared spectral energy distributions, which is remarkable considering the narrow spectral range being studied. Combined with our recent study of RSGs in the Galactic cluster Per OB1, these results indicate that this technique performs well over a range of metallicities, paving the way for forthcoming studies of more distant galaxies beyond the Local Group.

Abstract Copyright:

Journal keyword(s): Magellanic Clouds - stars: abundances - stars: atmospheres - stars: late-type - stars: massive - supergiants

Simbad objects: 31

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Number of rows : 31

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 PMMR 23 s*r 00 48 46.3685261827 -73 28 20.781513624 15.50 14.13 12.37 11.49   K5-M0Iab 34 0
2 SkKM 47 s*r 00 49 30.3876737434 -73 26 50.177944815 16.88 15.44 13.68 12.51 11.75 K2-K3Iab-II 11 0
3 PMMR 41 s*r 00 51 29.6746118372 -73 10 44.426902926 15.51 14.20 12.27 11.30 9.82 M0Iab 30 0
4 PMMR 47 s*r 00 51 50.2653635596 -72 05 57.632700114 16.51 14.66 12.83     K3.5Iabe 21 0
5 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9793 1
6 PMMR 70 s*r 00 54 35.9088539887 -72 34 14.421745012   14.07 12.22 11.30   M0Iab 21 0
7 NGC 300 GiG 00 54 53.4460065856 -37 41 03.182962667 8.83 8.69 8.13 7.46   ~ 1356 2
8 PMMR 79 s*r 00 55 36.5889084223 -72 36 24.035030866 16.03 14.48 12.73 11.84 9.63 K5-M0Iab 20 0
9 PMMR 83 s*r 00 55 58.8097191505 -73 20 41.611822601 15.87 14.43 12.68     M0Iab 17 0
10 NGC 330 Cl* 00 56 20.59 -72 27 12.5 9.37 9.76 9.55   8.89 ~ 375 0
11 NGC 346 Cl* 00 59 05.090 -72 10 33.24           ~ 458 0
12 LHA 115-S 30 s*r 01 00 41.5260783653 -72 10 36.975493960   13.98 12.17 11.18 10.35 K5Ia-Iab 38 0
13 PMMR 121 s*r 01 01 15.9724697158 -72 13 10.305717326 16.34 14.44 12.51 11.55   K5.5Ia-Iab 20 0
14 AzV 304 * 01 02 21.4818321206 -72 39 14.588838933   14.66 14.77     B0.5V 47 0
15 Dachs SMC 2-19 s*r 01 03 47.3430366356 -72 01 15.866494179 15.08 14.20 12.65 11.86   K2-M0.5Iab 18 0
16 Ass Per OB 1 As* 02 21 +57.6           ~ 163 1
17 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5935 1
18 LHA 120-N 11 HII 04 56 51.4 -66 24 24           ~ 240 0
19 SV* HV 5593 V* 05 04 41.7650267343 -70 42 37.169330706 16.963 15.224 13.336 12.09 10.567 M2.5I 23 0
20 SV* HV 2331 V* 05 05 56.6771780571 -70 35 23.844610399 16.592 14.744 12.816 11.67 10.445 M2.5I 19 1
21 SV* HV 5760 s*r 05 19 53.2885955769 -69 27 33.577454181 16.183 14.404 12.486 9.83 10.383 M3I 25 0
22 SP77 47-9 s*r 05 23 33.9856154541 -69 19 06.920171588 16.143 14.544 12.706 11.76 10.863 K3.5Ia-Iab 14 0
23 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15356 1
24 [W60] A2 s*r 05 26 34.8187260390 -68 51 39.973845777 12.903 13.374 12.296 11.15   M4Ia-Iab 30 0
25 SV* HV 2544 s*r 05 27 14.2209024729 -69 11 10.940384734 17.622 14.830 13.692 12.13 10.756 M2Ia 17 0
26 [W60] A18 s*r 05 28 45.4762615035 -68 58 02.294253135 14.573 13.854 12.206 11.12   M1Ia-Iab 22 0
27 [W60] A23 s*r 05 29 20.9976808305 -68 47 31.374447329   13.76 12.070 9.78 10.211 M0Ia-Iab 25 1
28 NGC 2004 Cl* 05 30 41.340 -67 17 21.83   9.6       ~ 267 0
29 W61 21-75 * 05 33 44.5471278500 -67 24 16.899800429 17.203 15.364 13.406 11.18   M1I 15 0
30 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1460 0
31 NAME Local Group GrG ~ ~           ~ 7264 0

    Equat.    Gal    SGal    Ecl

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2021.05.15-22:38:25

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