2012A&A...545A..29S


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.15CET11:30:53

2012A&A...545A..29S - Astronomy and Astrophysics, volume 545A, 29-29 (2012/9-1)

Two compact HII regions at the remote outskirts of the Magellanic Clouds.

SELIER R. and HEYDARI-MALAYERI M.

Abstract (from CDS):

The HII regions LMC N191 and SMC N77 are among the outermost massive star-forming regions in the Magellanic Clouds. So far, few works have dealt with these objects despite their interesting characteristics. We aim at studying various physical properties of these objects regarding their morphology (in the optical and Spitzer IRAC wavelengths), ionized gas emission, nebular chemical abundances, exciting sources, stellar content, age, presence or absence of young stellar objects, etc. This study is based mainly on optical ESO NTT observations, both imaging and spectroscopy, coupled with other archive data, notably Spitzer images (IRAC 3.6, 4.5, 5.8, and 8.0µm) and 2MASS observations. We show the presence of two compact HII regions, a low-excitation blob (LEB) named LMC N191A and a high-excitation blob (HEB) named SMC N77A, and study their properties and those of their exciting massive stars as far as spectral type and mass are concerned. We also analyze the environmental stellar populations and determine their evolutionary stages. Based on Spitzer IRAC data, we characterize the YSO candidates detected in the direction of these regions. Massive star formation is going on in these young regions with protostars of mass ∼10 and 20M in the process of formation.

Abstract Copyright:

Journal keyword(s): HII regions - stars: early-type - stars: formation - stars: fundamental parameters - Magellanic Clouds

Nomenclature: Tables 2,3 ; figs 1 to 4 :[SH2012] NNNN-NN, [SH2012] NNNN YSO N N=18

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 - 2020
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9141 1
2 NGC 346 Cl* 00 59 05.090 -72 10 33.24           ~ 442 0
3 SNR B0057-72.2 SNR 00 59 27.40 -72 10 10.7   12.37 12.57     ~ 214 0
4 [SH2012] N77 YSO 3 Y*? 01 02 38.81 -71 54 15.9           ~ 1 0
5 LHA 115-N 77B Em* 01 02 44.2322892386 -71 53 30.706578077   17.35 17.06 17.44   ~ 13 0
6 DEM S 117 SFR 01 02 49.0 -71 53 13           ~ 24 0
7 LHA 115-N 77A Em* 01 02 49.122 -71 53 17.99   14.66 14.20 15.31 15.16 ~ 22 1
8 2MASS J01025057-7153094 * 01 02 50.5735007109 -71 53 09.468181967   18.54 17.01 16.78   G0V 1 0
9 [BSS2007] 223 Y*? 01 02 53.28 -71 53 39.9           ~ 2 0
10 [B91] 24 As* 01 03 29 -71 56.0           ~ 6 0
11 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5410 1
12 SSTISAGE1C J050426.95-705351.6 Mi* 05 04 26.95 -70 53 51.6         19.574 ~ 3 0
13 2MASS J05042696-7053517 AB* 05 04 26.966 -70 53 51.71           ~ 1 0
14 2MASS J05043048-7053561 * 05 04 30.488 -70 53 56.19   15.75 15.74 15.85   ~ 1 0
15 2MASS J05043050-7054114 * 05 04 30.4993527391 -70 54 11.406358402   15.96 15.83 15.80   ~ 1 0
16 [SH2012] N191-12 * 05 04 31.000 -70 54 02.42   16.75 16.69 16.80   ~ 1 0
17 LHA 120-N 191B HII 05 04 31.4 -70 54 06           ~ 11 0
18 UCAC2 1446361 Em* 05 04 31.6918004489 -70 54 41.786350803   13.18 13.25 13.41   B0 3 0
19 [SH2012] N191 YSO 3 Y*? 05 04 32.19 -70 54 14.0           ~ 1 0
20 KMHK 518 As* 05 04 34 -70 54.3     11.53     ~ 14 0
21 2MASS J05043404-7054082 * 05 04 34.0584022739 -70 54 08.049684988   15.77 15.67 15.71   ~ 1 0
22 2MASS J05043589-7054302 Y*O 05 04 35.895 -70 54 30.24           ~ 5 0
23 LHA 120-N 191 EmO 05 04 37.3 -70 54 31           ~ 9 0
24 PMN J0504-7054 Rad 05 04 37.6 -70 54 39           ~ 7 1
25 [SH2012] N191-3 * 05 04 37.720 -70 54 40.50   17.31 17.01 16.82   ~ 1 0
26 2MASS J05043796-7054452 * 05 04 37.966 -70 54 45.27   16.40 16.28 16.12   ~ 1 0
27 HD 33540 * 05 04 38.126 -70 54 41.79   12.73 12.74 13.89 13.48 O/B2:e 38 0
28 [SH2012] N191-2 * 05 04 38.230 -70 54 39.05   17.90 17.59 17.16   ~ 1 0
29 [SH2012] N191-4 * 05 04 38.840 -70 54 40.95   16.66 16.60 16.46   ~ 1 0
30 [SH2012] N191-5 * 05 04 38.860 -70 54 42.11   17.12 17.06 16.89   ~ 1 0
31 [SH2012] N191-7 * 05 04 38.960 -70 54 46.16   16.89 16.82 16.90   ~ 1 0
32 2MASS J05043987-7054189 Y*O 05 04 39.872 -70 54 18.98   17.40 17.02 16.64   ~ 3 0
33 [FKM2008] LMC N J0504-7056 MoC 05 04 54.7 -70 56 25           ~ 4 0
34 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14392 1
35 LHA 120-N 206A HII 05 31 15.2 -71 03 58           ~ 97 2
36 RMC 136 Cl* 05 38 42.396 -69 06 03.36   9.63 9.50     ~ 1681 2
37 LHA 120-N 214 EmO 05 40 54 -71 14.7           ~ 15 0
38 LP 916-15 PM* 15 38 59.6477173130 -28 35 36.970418054   12.19 11.62     A 103 0
39 CD-44 12736 PM* 18 36 25.9487430436 -44 18 36.919462094   10.83 10.22     G0 191 0
40 CD-30 17706 WD* 20 10 56.8485174654 -30 13 06.629141494 11.654 12.286 12.242 12.311 12.381 DA3.1 215 0

    Equat.    Gal    SGal    Ecl

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2019.12.15-11:30:53

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