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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/1622
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dc.contributor.authorRoshi, Anish D.-
dc.contributor.authorKantharia, N.G.-
dc.contributor.authorAnantharamaiah, K.R.-
dc.date.accessioned2006-12-28T09:46:31Z-
dc.date.available2006-12-28T09:46:31Z-
dc.date.issued2002-09-
dc.identifier.citationAstronomy and Astrophysics, 2002, Vol.391, p1097-1113en
dc.identifier.issn0004-6361-
dc.identifier.urihttp://hdl.handle.net/2289/1622-
dc.description.abstractIn earlier papers (Roshi & Anantharamaiah \cite{ra00}, \cite{ra01a}), we presented extensive surveys (angular resolution - 2o x 2o and 2o x 6 arcmin) of radio recombination lines (RRLs) near 327 MHz in the longitude range l = 332o -〉 89o using the Ooty Radio Telescope. These surveys have detected carbon lines mostly between l = 358o -〉 20o and in a few positions at other longitudes. This paper presents the observed carbon line parameters in the high-resolution survey and a study of the galactic distribution and angular extent of the line emission observed in the surveys. The carbon lines detected in the surveys arise in ``diffuse'' C II regions. The l-v diagram and radial distribution constructed from our carbon line data shows similarity with that obtained from hydrogen recombination lines at 3 cm from H II regions indicating that the distribution of the diffuse C II regions in the inner Galaxy resembles the distribution of the star-forming regions. We estimated the [C II] 158 mu m emission from diffuse C II regions and find that upto 95% of the total observed [C II] 158 mu m emission can arise in diffuse C II regions if the temperature of the latter ~ 80 K. Our high-resolution survey data shows that the carbon line emitting regions have structures on angular scale ~ 6 arcmin. Analysis of the dual-resolution observations toward a 2o wide field centered at l = 13.9 deg and toward the longitude range l = 1.75 deg to 6.75 deg shows the presence of narrow (Delta V <= 15 km s-1) carbon line emitting regions extending over several degrees in l and b. The physical size perpendicular to the line-of-sight of an individual diffuse C II region in these directions is 〉200 pc.en
dc.format.extent419154 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherEDP Sciencesen
dc.relation.urihttp://dx.doi.org/10.1051/0004-6361:20020899en
dc.rights(2002) by the European Southern Observatory (ESO).en
dc.subjectGalaxy: generalen
dc.subjectISM: generalen
dc.subjectISM: structureen
dc.subjectradio lines: ISMen
dc.subjectinfrared: ISMen
dc.titleCarbon recombination lines near 327 MHz. I. ``Diffuse'' C II regions in the Galactic Disken
dc.typeArticleen
Appears in Collections:Research Papers (A&A)

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