2010A&A...517A..39H


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.24CET13:11:37

2010A&A...517A..39H - Astronomy and Astrophysics, volume 517, A39-39 (2010/7-1)

A very young component in the pre-eminent starburst region of the Small Magellanic Cloud.

HEYDARI-MALAYERI M. and SELIER R.

Abstract (from CDS):

Despite extensive research on various components of the N66/NGC346 complex, few studies have so far focused on N66A, which is a special object in the whole complex and therefore deserves scrutiny. The study of this compact HII region and its fellow objects seems important in the framework of massive star formation in the Magellanic Clouds. We present a study of the compact HII region N66A in the SMC pre-eminent starburst region N66/NGC346. This analysis is based mainly on our optical ESO NTT observations, both imaging and spectroscopy, coupled with archive HST ACS data and Spitzer infrared images (IRAC 3.6, 4.5, 5.8, and 8.0µm). We derive a number of physical characteristics of the compact HII region N66A. For the first time using spectroscopy, we present the spectral classification of the main exciting star of N66A. Its spectral features indicate that it is a main-sequence massive star of type O8. We compare this result with that based on the stellar Lyman continuum flux estimated from the ionized gas Hβ flux. The compact HII region belongs to a rare class of HII regions in the Magellanic Clouds, called high-excitation blobs (HEBs). We propose that N66A probably represents a very young massive star formation event in the N66 complex that has a range of ages.

Abstract Copyright:

Journal keyword(s): HII regions - stars: early-type - stars: formation - stars: fundamental parameters - ISM: individual objects: N66A - Magellanic Clouds

Simbad objects: 33

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Number of rows : 33

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     ~ 9232 1
2 SNR B0056-72.5 SNR 00 58 18.40 -72 17 22.7   20.58 20.70     ~ 49 1
3 Cl* NGC 346 W 3 * 00 59 00.7582411392 -72 10 28.171999499 11.46 12.61 12.80   13.63 O2III(f) 57 0
4 Cl* NGC 346 SSN 7 * 00 59 04.4954494512 -72 10 24.747496020   12.37 12.57     O4III(n)(f) 35 0
5 OGLE SMC-ECL- 3927 Al* 00 59 04.79 -72 11 03.0   15.15 15.308   15.391 O8V 9 0
6 NGC 346 Cl* 00 59 05.090 -72 10 33.24           ~ 443 0
7 Cl* NGC 346 MPG 455 * 00 59 05.435 -72 10 42.43   15.06 15.25     O9.5V 5 0
8 Cl* NGC 346 MPG 595 * 00 59 11.959 -72 10 56.10 14.44 15.26 15.47   15.72 B0-0.5V 6 0
9 Cl* NGC 346 MPG 629 * 00 59 13.91 -72 10 59.6   17.70 18.98   19.05 ~ 2 0
10 Cl* NGC 346 MPG 640 * 00 59 14.58 -72 10 59.9   17.49 19.81   19.83 ~ 2 0
11 Cl* NGC 346 MPG 641 HII 00 59 14.70 -72 11 02.3   16.64 17.33   17.41 ~ 3 0
12 [SSN2007] Sc 10 As* 00 59 14.9 -72 11 01           ~ 4 0
13 Cl* NGC 346 MPG 646 Em* 00 59 14.97 -72 11 02.1   15.19 15.97   16.15 O8V 3 0
14 Cl* NGC 346 MPG 648 * 00 59 15.15 -72 10 59.5   16.94 17.82   17.87 ~ 2 0
15 [GDB2006] 844 * 00 59 15.250 -72 11 00.78     18.74   18.45 ~ 1 0
16 Cl* NGC 346 MPG 654 * 00 59 15.42 -72 11 01.6   16.45 17.77   17.94 ~ 2 0
17 Cl* NGC 346 MPG 655 * 00 59 15.518 -72 11 11.71   14.67 14.82     O5V+OB 6 0
18 [CLC2000] peak I As* 00 59 19.8 -72 11 20           ~ 8 0
19 HD 5980 WR* 00 59 26.5847969465 -72 09 53.927725716   11.13 11.31   11.029 WN4+O7I: 356 1
20 SNR B0057-72.2 SNR 00 59 27.40 -72 10 10.7   12.37 12.57     ~ 216 0
21 SK 80 s*b 00 59 31.9755771921 -72 10 46.109784216   12.12 12.31     O7Iaf+ 104 0
22 HD 7113 Em* 01 09 13.066 -73 11 38.92     11.7     ~ 116 0
23 LHA 115-N 88A HII 01 24 07.823 -73 09 03.77   13.25 12.18     ~ 67 1
24 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5498 1
25 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14545 1
26 M 42 HII 05 35 17.3 -05 23 28           ~ 3684 0
27 RMC 136 Cl* 05 38 42.396 -69 06 03.36   9.63 9.50     ~ 1699 2
28 LP 916-15 PM* 15 38 59.6477173130 -28 35 36.970418054   12.19 11.62     A 104 0
29 [HMM90] A1 HII 17 46 59 -64 38.7           ~ 13 0
30 [HMM90] A2 HII 17 46 59 -64 38.7           ~ 13 0
31 IC 4662 bCG 17 47 09.192 -64 38 19.25   11.75 11.1 10.45   ~ 218 4
32 CD-44 12736 PM* 18 36 25.9487430436 -44 18 36.919462094   10.83 10.22     G0 192 0
33 CD-30 17706 WD* 20 10 56.8485174654 -30 13 06.629141494 11.654 12.286 12.242 12.311 12.381 DA3.1 217 0

    Equat.    Gal    SGal    Ecl

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2020.02.24-13:11:37

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