Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aspc..317...94a&link_type=abstract
Milky Way Surveys: The Structure and Evolution of our Galaxy, Proceedings of ASP Conference #317. The 5th Boston University Ast
Astronomy and Astrophysics
Astrophysics
1
Scientific paper
We present a new, sensitive CO J=1rightarrow 0 survey of the large translucent molecular cloud complex, MBM 53-55 using the CfA 1.2 m millimeter-wave telescope. A region extending from (l) = 84° to 97° and (b) = -44° to -30° was observed every 1/4 °--roughly every other beamwidth--to an rms noise of 0.15 K per 0.65 km s(-1) channel, for a total of 2968 spectra. Detected at velocities ranging from -15 to 0 km s(-1), CO is concentrated in an arc-shaped structure over 10° long. Comparison with HI data suggests that this complex coincides with the edge of an expanding HI shell, as previously noted by Gir, Blitz, & Magnani (1994). This complex is also seen in IRAS 100 μm observations. We derive an integrated mass of 1.3× 103 Msun assuming a distance of 150 pc (Welty et al 1989). An atomic mass of (3.3 × 103) Msun) was similarly derived from the HI emission integrated over the velocity range -15 to 0 km s(-1).
Aguti E. D.
Dame Thomas M.
Masheder M. R. W.
Thaddeus Patrick
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