J/ApJS/95/419 Molecular clouds in Cygnus. I. (Dobashi+ 1994)
Molecular clouds in Cygnus. I. A large-scale 13CO survey.
Dobashi K., Bernard J.-P., Yonekura Y., Fukui Y.
<Astrophys. J. Suppl. Ser. 95, 419 (1994)>
=1994ApJS...95..419D 1994ApJS...95..419D (SIMBAD/NED BibCode)
ADC_Keywords: Interstellar medium ; CO ; Radio sources
Keywords: catalogs - ISM: clouds - ISM: molecules
Abstract:
A large-scale 13CO(J=1-0) survey was performed with a 2.7' angular
resolution toward the Cygnus region, using the two 4-m millimeter
telescopes at Nagoya University. An area of 432deg2 was covered with
an 8' grid spacing, and 24,300 positions were observed. Significant
13CO emission (>1.2K.km/s=3σ) is detected at 2191 positions,
corresponding to a detection rate of 9%. On the basis of the 13CO
data, 159 distinct clouds are identified. Physical properties of these
clouds such as molecular column densities, sizes, and masses are
derived for the individual clouds. Astronomical objects associated
with the molecular clouds were searched for in the literature. Seven
H II regions, three SNRs, 45 T Tauri-type stars, 18 molecular
outflows, and 215 IRAS point sources selected as candidates for
protostars are likely to be associated with the molecular clouds. This
paper presents the observational technique used for this survey and a
complete list of the detected molecular clouds in Cygnus.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1 109 160 A catalog of 13CO clouds
table2 368 159 Associated astronomical objects
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Byte-by-byte Description of file: table1
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Sequential number
4 A1 --- Note [a] Note (1)
6- 15 A10 --- Name Cloud name
17- 18 I2 h RAh Peak right ascension of the 13CO cloud (1950)
20- 21 I2 min RAn Peak right ascension of the 13CO cloud (1950)
23- 26 F4.1 s RAs Peak right ascension of the 13CO cloud (1950)
28- 29 I2 deg DEd Peak declination of the 13CO cloud (1950)
31- 32 I2 arcmin DEm Peak declination of the 13CO cloud (1950)
34- 35 I2 arcsec DEs Peak declination of the 13CO cloud (1950)
37- 42 F6.2 deg GLON Galactic longitude
44- 48 F5.2 deg GLAT Galactic latitude
50- 52 F3.1 K Tr* Temperature
54- 56 F3.1 km/s DV {DELTA}V
58- 62 F5.1 km/s Vlsr Vlsr
64- 67 F4.1 K.km/s I Intensity
69- 72 F4.2 --- tau(CO) 13CO optical depth
74- 77 F4.1 10+15cm-2 N(CO) 13CO column density
79- 82 F4.1 10+21cm-2 N(H2) H2 column density
84 A1 --- l_size Limit flag on size
85- 87 I3 arcmin size ? Size (2)
88 A1 --- --- [x] multiplication sign
89- 91 I3 arcmin size2 ? Size (2)
93- 96 F4.2 kpc Dist ? Distance
97 A1 --- l_Mass Limit flag on Mass
98-102 I5 solMass Mass ? Cloud mass
104-113 A10 -- ref References (3)
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Note (1): a: There is a secondary velocity component at VLSR=-2.8 km/s at the
peak position of Cloud 8 (081.9+00.8).
Clouds 8 and 34 comprise more than one velocity components (see text).
Note (2): Size of the 13CO clouds measured at 1.2K.km/s contours in Fig. 1
(3σ).
Note (3): References to the adopted distances:
1: Dame & Thaddeus (1985ApJ...297..751D 1985ApJ...297..751D)
2: Blitz et al. (1982ApJS...49..183B 1982ApJS...49..183B)
3: Lada (1985ARA&A..23..267L 1985ARA&A..23..267L)
4: Fischer et al. (1985ApJ...293..508F 1985ApJ...293..508F)
5: Bally & Scoville (1980ApJ...239..121B 1980ApJ...239..121B)
6: Tatematsu et al. (1990A&A...237..189T 1990A&A...237..189T)
7: Yun & Clemens (1992ApJ...385L..21Y 1992ApJ...385L..21Y)
8: Clark (1986A&A...164L..19C 1986A&A...164L..19C)
9: Walker (1959ApJ...130...57W 1959ApJ...130...57W)
10: Dobashi et al. (1992AJ....104.1525D 1992AJ....104.1525D)
11: Elias (1978ApJ...223..859)
12: Fukui et al. (1993, in Protostras and planets III, ed. E. Levy,
Tuscon: Arizona Univ. Press, 603
13: Humphreys (1978ApJS...38..309H 1978ApJS...38..309H)
14: Sugitani et al. (1991ApJS...77...59S 1991ApJS...77...59S)
15: Sugitani et al. (1989ApJ...342L..87S 1989ApJ...342L..87S)
16: Lindblad et al. (1973A&A....24..309L 1973A&A....24..309L)
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Byte-by-byte Description of file: table2
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Sequential number
5- 14 A10 --- Cloud Cloud name
16- 17 I2 h RAh Peak right ascension of the 13CO cloud (1950)
19- 20 I2 min RAn Peak right ascension of the 13CO cloud (1950)
22- 25 F4.1 s RAs Peak right ascension of the 13CO cloud (1950)
27- 28 I2 deg DEd Peak declination of the 13CO cloud (1950)
30- 31 I2 arcmin DEm Peak declination of the 13CO cloud (1950)
33- 34 I2 arcsec DEs Peak declination of the 13CO cloud (1950)
36- 41 F6.2 deg GLON Galactic longitude
43- 47 F5.2 deg GLAT Galactic latitude
49- 52 A4 --- HII Associated HII region in Sharpless
(1959, Cat. VII/20)
54- 60 A7 --- SNRs Associated supernova remnant in Green
(1988Ap&SS.148....3G 1988Ap&SS.148....3G)
62- 64 A3 --- Rim The clouds having counterparts among bright
rimmed globules are denoted by "yes"
66- 88 A23 --- HBC T Tauri stars catalogued in Herbig & Bell
(1988, Cat. V/73) associated with the cloud
89- 90 I2 --- IPS ? Number of associated IRAS point sources
(Cat. II/125)
91- 92 A2 --- n_IPS [ns ] ns: cloud out of the coverage of the
IRAS PSC (Cat. II/125)
94-162 A69 --- Outflows Associated molecular outflows found in the
surveyed region.
164-368 A205 --- Lynds Associated darks clouds in Lynds
(1962, cat. VII/7)
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History: Prepared via OCR at CDS.
References:
Dobashi K. et al., Paper II. =1996ApJ...466..282D 1996ApJ...466..282D
(End) James Marcout, Patricia Bauer [CDS] 22-May-1997