2001A&A...372..527H

Query : 2001A&A...372..527H

2001A&A...372..527H - Astronomy and Astrophysics, volume 372, 527-534 (2001/6-3)

HST observations of the LMC compact H II region N11A.

HEYDARI-MALAYERI M., CHARMANDARIS V., DEHARVENG L., ROSA M.R., SCHAERER D. and ZINNECKER H.

Abstract (from CDS):

We present a study of the LMC compact HII region N11A using Hubble Space Telescope imaging observations which resolve N11A and reveal its unknown nebular and stellar features. The presence of a sharp ionization front extending over more than 4'' (1pc) and fine structure filaments as well as larger loops indicate an environment typical of massive star formation regions, in agreement with high [Oiii]/Hβ line ratios. N11A is a young region, as deduced from its morphology, reddening, and especially high local concentration of dust, as indicated by the Balmer decrement map. Our observations also reveal a cluster of stars lying towards the central part of N11A. Five of the stars are packed in an area less than 2'' (0.5pc), with the most luminous one being a mid O type star. N11A appears to be the most evolved compact HII region in the Magellanic Clouds so far studied.

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Journal keyword(s): stars: early-type - ISM: dust, extinction - HII regions - ISM: individual objects: N11A - galaxies: Magellanic Clouds

Nomenclature: Table 2: [HCD2001] N11A NN (Nos 1-18).

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 - 2024 		#notes
1 HD 7113 Em* 01 09 12.94464 -73 11 38.8968     11.7     ~ 122 0
2 LHA 115-N 88A HII 01 24 07.823 -73 09 03.77   13.25 12.18     ~ 74 1
3 SNR J045447-662528 SNR 04 54 48.00 -66 25 42.0           ~ 109 0
4 DEM L 34 HII 04 56 34.3 -66 26 52           ~ 101 0
5 NGC 1761 As* 04 56 39 -66 29.0     9.94     ~ 99 0
6 LHA 120-N 11 HII 04 56 51.4 -66 24 24           ~ 255 0
7 NGC 1763 As* 04 56 51.5 -66 24 25     9.40     ~ 162 3
8 [HCD2001] N11A 1 * 04 57 13.90 -66 23 21.0           ~ 1 0
9 [HCD2001] N11A 2 * 04 57 14.70 -66 23 07.4           ~ 1 0
10 [HCD2001] N11A 3 * 04 57 15.40 -66 23 35.7           ~ 1 0
11 IRAS 04571-6627 mul 04 57 15.5 -66 23 14           ~ 52 1
12 [HCD2001] N11A 4 * 04 57 15.90 -66 23 10.2           ~ 1 0
13 [HCD2001] N11A 5 * 04 57 16.20 -66 23 20.3           ~ 1 0
14 HD 32340 Em* 04 57 16.253 -66 23 20.94   13.11 12.45 14.00   O3-O6V 77 0
15 [HCD2001] N11A 6 * 04 57 16.30 -66 23 21.6           ~ 1 0
16 [HCD2001] N11A 8 * 04 57 16.30 -66 23 21.3           ~ 1 0
17 [HCD2001] N11A 7 * 04 57 16.30 -66 23 20.6           ~ 1 0
18 [HCD2001] N11A 9 * 04 57 16.40 -66 23 21.5           ~ 1 0
19 [HCD2001] N11A 10 * 04 57 16.60 -66 23 22.7           ~ 1 0
20 [HCD2001] N11A 18 * 04 57 16.90 -66 23 20.9           ~ 1 0
21 [HCD2001] N11A 11 * 04 57 17.20 -66 23 25.2           ~ 1 0
22 [HCD2001] N11A 13 * 04 57 17.30 -66 23 26.8           ~ 1 0
23 [HCD2001] N11A 12 * 04 57 17.30 -66 23 26.3           ~ 1 0
24 [HCD2001] N11A 14 * 04 57 17.40 -66 23 20.7           ~ 1 0
25 [HCD2001] N11A 15 * 04 57 17.40 -66 23 09.3           ~ 1 0
26 [HCD2001] N11A 16 * 04 57 17.70 -66 23 18.3           ~ 1 0
27 [HCD2001] N11A 17 * 04 57 18.50 -66 23 18.8           ~ 1 0
28 NGC 1769 As* 04 57 44.5 -66 27 42           ~ 70 2
29 NGC 1773 HII 04 58 12.0 -66 21 36           ~ 53 1
30 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17420 0
31 RMC 136 Cl* 05 38 42.396 -69 06 03.36   5.81 5.40     ~ 2017 2

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