2015ApJ...805..182G

Query : 2015ApJ...805..182G

2015ApJ...805..182G - Astrophys. J., 805, 182 (2015/June-1)

Red supergiants as cosmic abundance probes: the Sculptor galaxy NGC 300.

GAZAK J.Z., KUDRITZKI R., EVANS C., PATRICK L., DAVIES B., BERGEMANN M., PLEZ B., BRESOLIN F., BENDER R., WEGNER M., BONANOS A.Z. and WILLIAMS S.J.

Abstract (from CDS):

We present a quantitative spectroscopic study of 27 red supergiants (RSGs) in the Sculptor Galaxy NGC 300. J-band spectra were obtained using KMOS on the Very Large Telescope and studied with state of the art synthetic spectra including NLTE corrections for the strongest diagnostic lines. We report a central metallicity of [Z] = -0.03±0.05 with a gradient of -0.083±0.014 [dex/kpc], in agreement with previous studies of blue supergiants and H ii-region auroral line measurements. This result marks the first application of the J-band spectroscopic method to a population of individual RSG stars beyond the Local Group of galaxies and reveals the great potential of this technique.

Abstract Copyright: ∼

Journal keyword(s): galaxies: abundances - stars: abundances

Nomenclature: Tables 2,4: [GKE2015] NNN N=27 among (Nos 6-140).

Simbad objects: 40

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Number of rows : 40
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME Wolf-Lundmark-Melotte G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 691 2
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11151 1
3 [GKE2015] 132 s*r 00 54 08.7580339368 -37 38 03.211884384           K/MI: 1 0
4 [GKE2015] 37 s*r 00 54 16.18 -37 34 51.6         18.907 K/MI: 1 0
5 2MASS J00541708-3738551 s*r 00 54 17.0813583528 -37 38 54.921306228   21.07 19.30     K/MI: 2 0
6 2MASS J00541835-3735024 s*r 00 54 18.3599018280 -37 35 02.305866660   20.37 18.91     K/MI: 2 0
7 [MPG2004] 15 s*r 00 54 18.6083219976 -37 35 38.716933056   22.31 20.42   18.624 K/MI: 2 0
8 [GKE2015] 128 s*r 00 54 22.0252095384 -37 39 08.324139960           K/MI: 1 0
9 [GKE2015] 55 s*r 00 54 22.7262619488 -37 34 40.290304512         19.012 K/MI: 1 0
10 [GKE2015] 31 s*r 00 54 23.2880588688 -37 34 20.643037932         18.358 K/MI: 1 0
11 [GKE2015] 126 s*r 00 54 25.5554044512 -37 39 54.950271012           K/MI: 1 0
12 [GKE2015] 39 s*r 00 54 25.7529422184 -37 37 59.075883048         18.367 K/MI: 1 0
13 [GKE2015] 139 s*r 00 54 26.7892651464 -37 35 04.662115008         18.283 K/MI: 1 0
14 EV* N300 V0011 Ce* 00 54 28.1200318728 -37 38 43.184287032   21.42 21.00     K/MI: 6 0
15 [MPG2004] 31 s*r 00 54 28.2693085056 -37 37 54.594818904   20.98 19.05     K/MI: 2 0
16 [GKE2015] 135 s*r 00 54 29.4026600832 -37 37 56.233711920           K/MI: 1 0
17 2MASS J00543092-3737570 s*r 00 54 30.9772110432 -37 37 57.342317700   21.81 19.80     K/MI: 2 0
18 2MASS J00544267-3739172 s*r 00 54 42.6633192312 -37 39 17.161266744     18.8     K/MI: 2 0
19 [MPG2004] 72 s*r 00 54 45.4150087608 -37 38 35.560000140   23.1 20.75   18.190 K/MI: 2 0
20 2MASS J00544792-3739105 s*r 00 54 47.9219246136 -37 39 10.313875548   22.49 20.57   17.858 K/MI: 2 0
21 [GKE2015] 6 s*r 00 54 47.9784085224 -37 37 39.522545112         17.782 K/MI: 1 0
22 [GKE2015] 14 s*r 00 54 48.5808503160 -37 38 02.290232364         18.617 K/MI: 1 0
23 [GKE2015] 13 s*r 00 54 49.58 -37 38 50.5         18.534 K/MI: 1 0
24 [GKE2015] 11 s*r 00 54 49.91 -37 38 27.3         18.471 K/MI: 1 0
25 [GKE2015] 10 s*r 00 54 52.07 -37 40 32.1         18.220 K/MI: 1 0
26 [GKE2015] 24 s*r 00 54 53.1356386728 -37 39 28.494945468         18.977 K/MI: 1 0
27 NGC 300 GiG 00 54 53.4465638304 -37 41 03.168402396 8.83 8.69 8.13 7.46   ~ 1503 2
28 [GKE2015] 102 s*r 00 54 53.7442622832 -37 36 47.794816404           K/MI: 1 0
29 [GKE2015] 22 s*r 00 54 53.8537716600 -37 40 08.917228704         18.956 K/MI: 1 0
30 [GKE2015] 101 s*r 00 55 02.1387724248 -37 37 50.595679884           K/MI: 1 0
31 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1360 4
32 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1236 2
33 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5839 1
34 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17438 0
35 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4450 3
36 NGC 3109 AG? 10 03 06.877 -26 09 34.46 11.10 10.42 10.04 9.91   ~ 769 2
37 NGC 3621 Sy2 11 18 16.300 -32 48 45.36 10.10 9.44 9.56 8.07 10.1 ~ 590 3
38 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2364 3
39 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1562 0
40 NAME Local Group GrG ~ ~           ~ 8393 0

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