2008MNRAS.391.1527P

Query : 2008MNRAS.391.1527P

2008MNRAS.391.1527P - Mon. Not. R. Astron. Soc., 391, 1527-1544 (2008/December-3)

Observations of 58 compact HII regions at mid-infrared wavelengths.

PHILLIPS J.P. and RAMOS-LARIOS G.

Abstract (from CDS):

We present 3.6, 4.5, 5.8 and 8.0µm photometry and mapping for 58 compact Hii regions identified using the Spitzer Galactic Legacy Infrared Midplane Survey Extraordinaire (GLIMPSE). These are used to investigate trends in the colours, magnitudes and structures of the sources, together with spatial variations in flux ratio. It is concluded that most of the sources are remarkably similar, and have comparable variations in flux ratio as a function of position within the shells, together with very narrowly defined ranges of colour index. Systematic variations of surface brightnesses S with harmonic mean size Θ(HARM) also imply that S ∝ R–β, where β > 0.4; a result which may suggest that the widths of the emission zones are either more or less invariant, or increase with increasing source size. We note that the variation in longer wave flux ratios may imply the presence of polycyclic aromatic hydrocarbon (PAH) emission within large photodissociative regimes, evidence for which is also noted in colour imaging of the sources. The most intense 5.8 and 8µm emission appears to be concentrated close to the interior ionization fronts, however, where fluorescent excitation of the PAH molecules and the number densities for the grain carriers are both likely to be at their greatest.

Abstract Copyright: © 2008 The Authors. Journal compilation © 2008 RAS

Journal keyword(s): dust, extinction - Hii regions - ISM: jets and outflows - infrared: ISM

VizieR on-line data: <Available at CDS (J/MNRAS/391/1527): table1.dat refs.dat>

Nomenclature: Table 1: [PR2008] NN (Nos 1-58). Fig. 1: [PR2008] GLLL.l+BB.b N=18.

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 26

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Number of rows : 26
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [CG2001] G310.89+0.01 HII 13 59 35.6 -61 48 15           ~ 3 0
2 LEDA 3077847 G 16 12 08.2 -49 52 20           ~ 5 0
3 GPSR5 14.490+0.020 HII 18 16 46.68 -16 20 34.5           ~ 3 0
4 GPSR5 18.165+0.337 Rad 18 22 48.04 -12 57 11.7           ~ 2 0
5 GPSR5 19.741+0.281 bub 18 26 01.6 -11 35 11           ~ 9 1
6 RFS 293 Rad 18 30 02.7 -12 15 23           ~ 4 1
7 UCAC3 160-180188 * 18 30 35.7583445304 -10 21 04.002912468       13.31 12.66 M4e/M5 3 1
8 GPSR5 33.265+0.066 Rad 18 51 48.72 +00 19 34.9           ~ 2 0
9 [WAM82] 034.132+0.472 HII 18 51 56.8 +01 17 00           ~ 2 0
10 GPSR5 34.133+0.470 Rad 18 51 57.3 +01 17 00           ~ 4 0
11 GRS G033.90 +00.10 Rad 18 52 49 +00 55.5           ~ 4 0
12 RAFGL 5541 Y*O 18 52 50.26 +00 55 29.6           ~ 122 1
13 [THW2006] G033.92+00.11 cor 18 52 50.371 +00 55 29.54           ~ 30 0
14 [KJB2003] G33.915+0.109 HII 18 52 50.7 +00 55 20           ~ 3 0
15 [BDS2003] 126 Cl* 18 52 51 +00 55.5           ~ 3 0
16 GPSR5 33.991-0.004 Rad 18 53 23.08 +00 56 25.6           ~ 2 0
17 GPSR5 35.949-0.147 HII 18 57 28.9 +02 37 02           ~ 9 1
18 NVSS J190149+062751 Rad 19 01 49.06 +06 27 50.4           ~ 4 1
19 CORNISH G037.8683-00.6008 Y*O 19 02 36.17 +04 07 01.3           ~ 8 0
20 PN HaTr 12 PN 19 03 47.2679875512 +05 09 41.044956372       16.111   ~ 9 0
21 GPSR5 39.728-0.396 Rad 19 05 17.67 +05 51 48.6           ~ 2 0
22 WSRTGP 1919+1523 Rad 19 21 22.6 +15 29 02           ~ 2 0
23 2MASS J19233684+1728589 Y*O 19 23 36.8145280608 +17 28 58.953209844           ~ 52 0
24 [PBC91] B192122.9+172306 Mas 19 23 37.0 +17 28 59           ~ 3 0
25 Mol 103C3 Rad 19 23 37.157 +17 28 58.50           ~ 2 0
26 RFS 985 Rad 19 39 35.0 +24 00 00           ~ 2 0

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