J/A+A/526/A151 Hi-Gal sources distance determination (Russeil+, 2011)
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., Wyrowski F.
<Astron. Astrophys., 526, A151 (2011)>
=2011A&A...526A.151R 2011A&A...526A.151R
ADC_Keywords: Galactic plane ; H II regions ; Stars, distances ; Spectroscopy
Keywords: Galaxy: structure - Galaxy: general - infrared: general -
infrared: ISM - HII regions - ISM: clouds
Abstract:
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 500um 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°.
Description:
We obtain velocities along the line of sight to Hi-GAL sources, where
possible, using CO data observed with the SEQUOIA receiver on the
FCRAO 14m telescope. In the l=30 ° region we use the 13CO J=1-0
data from the BU-FCRAO Galactic Ring Survey (GRS, Jackson et al.,
2006ApJS..163..145J 2006ApJS..163..145J) while in the l=59° region we use 13CO and
C18O J=1-0 observations obtained as part of the Exeter-FCRAO CO
Galactic Plane Survey (Brunt et al., in prep.).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tableb1.dat 170 208 Star-forming complexes in the l=30° field
tableb2.dat 165 20 Star-forming complexes in the l=59° field
--------------------------------------------------------------------------------
See also:
J/ApJ/582/756 : Velocities of HII regions (Kolpak+, 2003)
J/ApJS/154/553 : Inner galaxy massive star formation regions (Sewilo+, 2004)
J/ApJ/653/1325 : Galactic distribution of infrared dark clouds (Simon+, 2006)
J/A+A/486/191 : Distances towards 6.7GHz methanol masers (Pandian+, 2008)
J/ApJ/680/349 : Galactic distribution of IRDCs (Jackson+, 2008)
J/ApJS/181/255 : CO in Galactic HII regions (Anderson+, 2009)
J/ApJ/690/706 : Distances of Galactic HII regions (Anderson+, 2009)
Byte-by-byte Description of file: tableb[12].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Cplx Complex number
4- 6 F3.1 kpc Dist1 ?=- Near distance
7 A1 --- --- [/]
8- 11 F4.1 kpc Dist2 ?=- Far distance
12 A1 --- --- [/]
13- 15 F3.1 kpc Dist3 ?=- Tangent distance
17- 21 A5 --- n_Dist Adopted distance (Near, Far or Tang.) (1)
22- 25 F4.2 kpc Dist ? Stellar (or maser parallax) distance
26- 31 A6 --- HII Optical name of associated HII region
33- 56 A24 --- Source Source name or galactic position name (2)
57- 60 F4.1 km/s VHa ? Hα (LSR) velocity
61 A1 --- --- Separation code (3)
62- 65 F4.1 km/s VHa2 ? Hα (LSR) velocity
66 A1 --- --- [(]
67- 70 F4.1 km/s VHa3 ? Hα (LSR) velocity
71 A1 --- --- [)]
73- 77 F5.1 km/s Vrad ? Radio recombination-line (LSR) velocity
78 A1 --- --- Separation code (3)
79- 83 F5.1 km/s Vrad2 ? Radio recombination-line (LSR) velocity
84 A1 --- --- Separation code (3)
85- 89 F5.1 km/s Vrad3 ? Radio recombination-line (LSR) velocity
90 A1 --- --- Separation code (3)
91- 94 F4.1 km/s Vrad4 ? Radio recombination-line (LSR) velocity
95 A1 --- --- Separation code (3)
96- 99 F4.1 km/s Vrad5 ? Radio recombination-line (LSR) velocity
101-105 F5.1 km/s Vmol ? Molecular line velocity (CO and/or CS)
106 A1 --- --- Separation code (3)
107-111 F5.1 km/s Vmol2 ? Molecular line velocity (CO and/or CS)
112 A1 --- --- Separation code (3)
113-117 F5.1 km/s Vmol3 ? Molecular line velocity (CO and/or CS)
118 A1 --- --- Separation code (3)
119-123 F5.1 km/s Vmol4 ? Molecular line velocity (CO and/or CS)
125-127 I3 km/s Vabs ? H2CO or OH absorption line (LSR) velocity
128 A1 --- --- Separation code (3)
129-131 I3 km/s Vabs2 ? H2CO or OH absorption line (LSR) velocity
132 A1 --- --- Separation code (3)
133-135 I3 km/s Vabs3 ? H2CO or OH absorption line (LSR) velocity
136 A1 --- --- Separation code (3)
137-139 I3 km/s Vabs4 ? H2CO or OH absorption line (LSR) velocity
140 A1 --- --- Separation code (3)
141-143 I3 km/s Vabs5 ? H2CO or OH absorption line (LSR) velocity
144 A1 --- --- Separation code (3)
145-147 I3 km/s Vabs6 ? H2CO or OH absorption line (LSR) velocity
148 A1 --- --- Separation code (3)
149-151 I3 km/s Vabs7 ? H2CO or OH absorption line (LSR) velocity
152 A1 --- --- Separation code (3)
153-154 I2 km/s Vabs8 ? H2CO or OH absorption line (LSR) velocity
155 A1 --- --- Separation code (3)
156-157 I2 km/s Vabs9 ? H2CO or OH absorption line (LSR) velocity
159-162 A4 --- NF Near/far/tangent solution (4)
163-165 A3 --- r_NF NF references (5)
166 A1 --- --- [,;]
167 A1 --- NF2 Near/far/tangent solution (4)
168-170 A3 --- r_NF2 NF2 references (5)
--------------------------------------------------------------------------------
Note (1): if not indicated, the stellar distance (Dist) is adopted
Note (2): "Wat", "SW", "A" correspond to radio sources listed mainly in
Watson et al. (2003ApJ...587..714W 2003ApJ...587..714W), Sewilo (2004, Cat. J/ApJS/154/553)
and Anderson et al. (2009, Cat. J/ApJS/181/255), respectively.
The molecular information is from Dame et al. (1986ApJ...305..892D 1986ApJ...305..892D) for "GMC",
from Roman-Duval et al. (2009ApJ...699.1153R 2009ApJ...699.1153R) for "GRSMC" clouds, from
Solomon et al. (1987ApJ...319..730S 1987ApJ...319..730S) for "Sol" clouds, from Jacq et al.
(1988A&A...195...93J 1988A&A...195...93J) for "Bx" clouds and from Simon et al. (2006, Cat.
J/ApJ/653/1325) and Jackson et al. (2008, Cat. J/ApJ/680/349) for "IRDC".
For "GMC" and "Bx" clouds the radius and velocity FWHM of the cloud is
given in brackets. Note that the typical radius and velocity FWHM of
"GRSMC" clouds are 0.35±0.12 degrees and 3.57±1.21km/s. These values
are lower than the typical values for GMC.
Note (3): When different values are found in the literature, they are given
separated by a semicolon. If several velocities (along the line of sight)
are measured they are separated by a backslash.
Note (4): Near/far/tangent solution mainly from HI emission/absorption or HI
self-absorption methods and references. N means near, F means far, T means
tangent. When two solutions are proposed in brackets the first comes from
the HI emission/absorption method, the second from the HI self-absorption
method (Anderson & Bania, 2009, Cat. J/ApJ/690/706). For sources where the
two methods disagree, the favoured one by Anderson & Bania (2009,
Cat. J/ApJ/690/706) is marked with an asterisk.
Note (5): References as follows:
a = Watson et al. (2003ApJ...587..714W 2003ApJ...587..714W)
b = Solomon et al. (1987ApJ...319..730S 1987ApJ...319..730S)
c = Sewilo et al. (2004, Cat. J/ApJS/154/553)
d = Pandian et al. (2008, Cat. J/A+A/486/191)
e = Kolpack et al. (2003, cat. J/ApJ/582/756)
f = Anderson et al. (2009, Cat. J/ApJS/181/255)
g = Anderson & Bania (2009, Cat. J/ApJ/690/706)
h = Roman-Duval et al. (2009ApJ...699.1153R 2009ApJ...699.1153R)
i = Kuchar & Bania (1994ApJ...436..117K 1994ApJ...436..117K)
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 31-May-2011