2008AJ....135.1708B


Query : 2008AJ....135.1708B

2008AJ....135.1708B - Astron. J., 135, 1708-1717 (2008/May-0)

The ionizing stars of the galactic ultra-compact H II region G45.45+0.06.

BLUM R.D. and McGREGOR P.J.

Abstract (from CDS):

Using the Near-infrared Integral-Field Spectrograph (NIFS) behind the facility adaptive optics module, ALTAIR, on Gemini North, we have identified several massive O-type stars that are responsible for the ionization of the Galactic Ultra-Compact H II region G45.45+0.06. The sources "m" and "n" from the imaging study of Feldt et al. are classified as hot, massive O-type stars based on their K-band spectra. Other bright point sources show red and/or nebular spectra and one appears to have cool-star features that we suggest are due to a young, low-mass pre-main-sequence component. Still two other embedded sources ("k" and "o" from Feldt et al.) exhibit CO bandhead emission that may arise in circumstellar disks which are possibly still accreting. Finally, nebular lines previously identified only in higher excitation planetary nebulae and associated with Kr III and Se IV ions are detected in G45.45+0.6.

Abstract Copyright:

Journal keyword(s): dust, extinction - H II regions - infrared: stars - instrumentation: adaptive optics - stars: formation

Nomenclature: Fig.2: [FSH98] aW (No. hS) added.

Simbad objects: 24

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Number of rows : 24
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 [DBS2003] 8 Cl* 07 35 39 -18 48.8           ~ 7 0
2 NGC 5461 HII 14 03 40.96 +54 19 02.4           ~ 178 0
3 HD 155379 * 17 12 13.6197186499 -25 15 18.522516565   6.467 6.499     A0V 63 0
4 GAL 005.88-00.41 HII 18 00 30.388 -24 04 00.20           ~ 309 0
5 W 31 SFR 18 10 28.6 -19 55 51           ~ 246 0
6 HD 167135 * 18 13 25.1309055018 +11 53 03.405162092   6.89 6.87     A0 6 0
7 HH 80 HH 18 19 06.1 -20 51 49           ~ 97 0
8 HH 81 HH 18 19 06.7 -20 51 06           ~ 86 0
9 NAME GGD 27 IRS RNe 18 19 12.0871543084 -20 47 50.895583646           ~ 26 1
10 Caswell OH 045.12+00.13 HII 19 13 27.845 +10 53 36.74           ~ 114 0
11 GAL 045.5+00.0 HII 19 14 20.8 +11 09 04           ~ 138 0
12 [FSH98] hS NIR 19 14 21.0 +11 09 08           ~ 1 0
13 [FSH98] k NIR 19 14 21.08 +11 09 12.0           ~ 2 0
14 [FSH98] i NIR 19 14 21.11 +11 09 12.3           ~ 2 0
15 [FSH98] h NIR 19 14 21.15 +11 09 12.6           ~ 2 0
16 [FSH98] g NIR 19 14 21.22 +11 09 13.0           ~ 2 0
17 [FSH98] n NIR 19 14 21.25 +11 09 10.9           ~ 3 0
18 [FSH98] m NIR 19 14 21.28 +11 09 10.9           ~ 4 0
19 [GPD88] 045.454+0.060 HII 19 14 21.3 +11 09 13           ~ 151 1
20 [FSH98] l NIR 19 14 21.31 +11 09 10.8           ~ 4 0
21 [FSH98] o NIR 19 14 21.33 +11 09 09.9           ~ 4 0
22 [WBN74] W 51 IRS 2 SFR 19 23 40.05 +14 31 07.1           ~ 258 0
23 W 51 SNR 19 23 50 +14 06.0           ~ 1193 1
24 HD 192501 * 20 14 51.7217217566 +10 28 20.473269378   7.03 7.03     A0 8 0

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2021.10.21-00:41:41

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