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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/2296
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dc.contributor.authorKantharia, N.G.-
dc.contributor.authorGoss, W.M.-
dc.contributor.authorRoshi, Anish D.-
dc.contributor.authorMohan, Niruj R.-
dc.contributor.authorViallefond, F.-
dc.date.accessioned2007-04-26T06:18:05Z-
dc.date.available2007-04-26T06:18:05Z-
dc.date.issued2007-03-
dc.identifier.citationJournal of Astrophysics and Astronomy, 2007, Vol.28, p41-53en
dc.identifier.issn0250-6335-
dc.identifier.issn0973-7758 (online)-
dc.identifier.urihttp://hdl.handle.net/2289/2296-
dc.descriptionOpen Access.en
dc.description.abstractWe report multi-frequency radio continuum and hydrogen radio recombination line observations of HII regions near l = 24.8◦, b = 0.1◦ using the Giant Metrewave Radio Telescope(GMRT) at 1.28 GHz (n = 172), 0.61 GHz (n = 220) and the Very Large Array (VLA) at 1.42 GHz (n = 166). The region consists of a large number of resolved HII regions and a few compact HII regions as seen in our continuum maps, many of which have associated infrared (IR) point sources. The largest HII region at l = 24.83◦ and b = 0.1◦ is a few arcmins in size and has a shell-type morphology. It is a massive HII region enclosing ∼550M with a linear size of 7 pc and an rms electron density of ∼110 cm−3 at a kinematic distance of 6 kpc. The required ionization can be provided by a single star of spectral type O5.5. We also report detection of hydrogen recombination lines from the HII region at l = 24.83◦ and b = 0.1◦ at all observed frequencies near Vlsr = 100 km s−1. We model the observed integrated line flux density as arising in the diffuse HII region and find that the best fitting model has an electron density comparable to that derived from the continuum.We also report detection of hydrogen recombination lines from two other HII regions in the field.en
dc.format.extent1611054 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherIndian Academy of Sciences, Bangalore, Indiaen
dc.relation.urihttp://adsabs.harvard.edu/cgi-bin/bib_query?2007astro.ph..3204Ken
dc.relation.urihttp://arxiv.org/abs/astro-ph/0703204en
dc.rightsIndian Academy of Sciences, Bangalore, Indiaen
dc.subjectInterstellar mediumen
dc.subjectradio recombination linesen
dc.subjectHII regions—envelopesen
dc.titleGMRT and VLA Observations at 49 cm and 20 cm of the HII Region near l = 24.8d, b = 0.1den
dc.typeArticleen
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