2011A&A...526A.151R


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.08CEST03:56:42

2011A&A...526A.151R - Astronomy and Astrophysics, volume 526A, 151-151 (2011/2-1)

Giving physical significance to the Hi-GAL data: determining the distance of cold dusty cores in the Milky Way.

RUSSEIL D., PESTALOZZI M., MOTTRAM J.C., BONTEMPS S., ANDERSON L.D., ZAVAGNO A., BELTRAN M.T., BALLY J., BRAND J., BRUNT C., CESARONI R., JONCAS G., MARSHALL D., MARTIN P., MASSI F., MOLINARI S., MOORE T., NORIEGA-CRESPO A., OLMI L., THOMPSON M.A., WIENEN M. and WYROWSKI F.

Abstract (from CDS):

HI-GAL, an open time key-project of the Herschel satellite, was awarded 343 hours observing time to carry out a 5-band photometric imaging survey at 70, 160, 250, 350, and 500µm of a |b|≤1° wide strip of the Milky Way Galactic plane in the longitude range -70°≤l≤70°. Two 2°x2° fields centred at l=30° and l=59° have been observed with the SPIRE and PACS photometric cameras in parallel mode during the Herschel science demonstration phase (SDP). From the images, compact sources are extracted for which the distance must be established in order to determine their physical properties. The aim of this paper is to present the distance determination strategy for the HI-GAL compact sources. We illustrate this strategy for the two fields at l=30° and l=59°. The first step to determine the distance is to establish the LSR (local standard of rest) velocity of each compact source. The kinematic distance is then determined assuming a rotation curve for our Galaxy. To resolve the distance ambiguity for sources within the solar circle, we adopt a multiwavelength approach combining extinction maps, optical, and near infrared images, and velocity information from NH3, CO and HI data. When sources can be kinematically linked to optical HII regions, the stellar distance of the exciting stars, when known, can be attributed to all linked sources. In the two 2°x2° SDP fields, 2678 compact sources have been identified and listed in the band-merged catalogue. About 93% of these sources have been assigned a radial velocity and distance. A multiwavelength approach is necessary to assign the correct velocity to sources (especially when CO spectra have a lot of features) and to determine the distance by solving the distance ambiguity. Also, several HI-GAL sources seem to be in the interarm region. These sources have to be investigated with dedicated programme to be compared with sources located in the spiral arms.

Abstract Copyright:

Journal keyword(s): Galaxy: structure - Galaxy: general - infrared: general - infrared: ISM - HII regions - ISM: clouds

VizieR on-line data: <Available at CDS (J/A+A/526/A151): tableb1.dat tableb2.dat>

Nomenclature: Table B.1: [RPM2011] NN (Nos 1-18) N=18, [RPM2011] GLLL.lll+BB.bbb N=228

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

Simbad objects: 29

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Number of rows : 29

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 Per Arm PoG 03 30 +45.0           ~ 1247 0
2 NAME Crux-Scutum Spiral Arm reg 12 30 -60.0           ~ 275 0
3 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11535 0
4 [CPA2006] N50 bub 18 43 54.9 -03 27 10           ~ 9 1
5 [L89b] 28.823-00.226 HII 18 44 44.3 -03 45 34           ~ 66 0
6 [CPA2006] N51 bub 18 45 28.8 -03 28 40           ~ 11 0
7 LBN 030.54+00.41 HII 18 45.5 -02 00           ~ 9 0
8 GAL 029.96-00.02 Y*O 18 46 03.7 -02 39 21           ~ 331 1
9 LBN 029.07-00.63 HII 18 47 03.6 -03 48 04   12.68 11.93     ~ 15 0
10 [CPA2006] N54 bub 18 47 09.4 -01 27 26           ~ 10 0
11 [CPA2006] N52 bub 18 47 31 -01 57.1           ~ 10 0
12 SNR G030.8-00.0 SNR 18 47 32 -01 56.5           ~ 437 0
13 [CPA2006] N53 bub 18 48 43.2 -01 38 38           ~ 7 1
14 LBN 030.66-00.65 HII 18 49 21.9 -02 21 38           ~ 7 0
15 NAME Sgr Arm PoG 19 00 -30.0           ~ 523 1
16 [CPA2006] N124 bub 19 38 28.2 +22 59 37           ~ 6 0
17 [CPA2006] N125 bub 19 38 45.7 +23 08 30           ~ 5 0
18 [CPA2006] N126 bub 19 41 49.4 +23 42 17           ~ 7 0
19 NGC 6823 OpC 19 43 09 +23 18.0   7.71 7.1     ~ 249 2
20 MSX6C G059.7831+00.0648 Y*O 19 43 11.21664 +23 44 03.9696           ~ 130 0
21 IRAS 19410+2336 SFR 19 43 11.5 +23 44 06           ~ 140 0
22 LBN 059.38-00.15 HII 19 43 12 +23 15.0           ~ 18 1
23 Ass Vul OB 1 As* 19 44.0 +24 13           ~ 86 0
24 SH 2-87 HII 19 46 20.7 +24 35 15           ~ 152 2
25 LBN 061.50+00.29 HII 19 46 45.7 +25 12 56           ~ 62 0
26 LBN 063.10+00.46 HII 19 49 11.7 +26 51 36   14.60 13.63     ~ 50 0
27 SH 2-89 HII 19 50 04.5 +26 28 23   13.72 12.11     ~ 13 0
28 NAME Cyg Arm PoG 20 02 +40.0           ~ 141 0
29 NAME Scutum Spiral Arm PoG ~ ~           ~ 275 0

    Equat.    Gal    SGal    Ecl

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2020.07.08-03:56:42

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