Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-07-11
Astronomy and Astrophysics
Astrophysics
41 pages including 5 tables and 9 figures, using AASTEX macros v4.0, because of space restrictions some figures are reduced qu
Scientific paper
10.1086/317794
We present a study of carbon in N159/N160, an HII region complex in the low metallicity Large Magellanic Cloud. We have mapped this region, which comprises four distinct molecular clouds spanning a wide range of star-formation activity, in four transitions: 13CO (1-0) CO (2-1) and (4-3), and [CI] (1-0). Combining these data with existing [CII] observations provides a complete picture of the predominant forms of carbon in the gas phase of the ISM. The new CO (2-1) data show that the complex is immersed in an envelope of extended, low level emission, undetected by previous (1-0) mapping efforts. The CO (2-1)/(1-0) ratio in this envelope is >~3, a value consistent with optically thin CO emission. The envelope is also relatively bright in [CI] and [CII], and calculations show that it is mostly photodissociated: it appears to be translucent (Av<1). Neutral carbon emission in the complex unexpectedly peaks at the quiescent southern cloud (N159S). In the northern portion of the map (the N160 nebula), the HII regions prominent in [CII] correspond to holes in the [CI] distribution. Overall we find that, while the [CII]/CO ratio is enhanced with respect to similar complexes in the Milky Way, the [CI]/CO ratio appears to be similar or reduced.
Bolatto Alberto D.
Israel Frank P.
Jackson James M.
Kim Sungeun
Zhang Xiaolei
No associations
LandOfFree
Carbon in the N159/N160 Complex of the Large Magellanic Cloud does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Carbon in the N159/N160 Complex of the Large Magellanic Cloud, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Carbon in the N159/N160 Complex of the Large Magellanic Cloud will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-278968