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Titolo:
Galactic anticenter CO survey - I. Area l = 178 degrees to 186 degrees, b = 3.degrees 5 to 6 degrees
Autore:
Lee, Y; Jung, JH; Chung, HS; Kim, HG; Park, YS; Kim, HR; Kim, BG; Kim, J; Han, ST;
Indirizzi:
Taeduk Radio Astron Observ, Korea Astron Observ, Taejon 305348, South Korea Taeduk Radio Astron Observ Taejon South Korea 305348 305348, South Korea
Titolo Testata:
ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES
fascicolo: 2, volume: 138, anno: 1999,
pagine: 187 - 202
SICI:
0365-0138(199908)138:2<187:GACS-I>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
GALAXY MOLECULAR CLOUDS; OUTER GALAXY; (CO)-C-13 SURVEY; SOLAR CIRCLE; IRAS SOURCES; MILKY-WAY; EMISSION; REGIONS; QUADRANT; COMPLEX;
Keywords:
ISM : clouds; ISM : abundance; ISM : dust; ISM : HII regions;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
46
Recensione:
Indirizzi per estratti:
Indirizzo: Lee, Y Harvard Smithsonian Ctr Astrophys, 60 Garden St,MS-78, Cambridge, MA 02138USA Harvard Smithsonian Ctr Astrophys 60 Garden St,MS-78 Cambridge MA USA 02138
Citazione:
Y. Lee et al., "Galactic anticenter CO survey - I. Area l = 178 degrees to 186 degrees, b = 3.degrees 5 to 6 degrees", ASTR AST SS, 138(2), 1999, pp. 187-202

Abstract

We have mapped a 17 square-degree section (l,b) = (178.degrees 0 similar to 186.degrees 0, 3.degrees 5 similar to 6.degrees 0) of the Galactic Anticenter region in the (CO)-C-12 J = 1 - 0 line using the 3-mm SIS receiver on the 14-m telescope at the Taeduk Radio Astronomy Observatory. A total of 7000 spectra has been obtained with a grid spacing of 3'. The results of the observations are presented in the form of I - b and v - b contour maps. Molecular emission of the mapped area is found to be very extended and matcheswith the FIR emission boundary. The radial velocity of the molecular gas is found to be within the range of (LSR)-L-v = -25 similar to +10 km s(-1). We also found several small clouds located at 1 = 180 degrees, b = 5 degrees similar to 6 degrees having (LSR)-L-v = -20 km s(-1), which is quite anomalous in this direction. We identified 30 individual clouds within the mapped region with an arbitrary threshold temperature using a cloud identification code. Twelve subclouds were also identified from the largest cloud witha higher threshold temperature. The ratio of dust emission to CO integrated intensity for the Galactic Anticenter region is found to be similar to that of the dark clouds in solar neighborhood, and much less than that of giant molecular clouds, implying that the heating source within the clouds is minimal.

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Documento generato il 09/04/20 alle ore 07:33:49