Optical depth of molecular gas in starburst galaxies - Is M82 the prototype?
An attempt is made to survey the CO(2-1) emission toward the centers of 17 IR-luminous galaxies which have previously been detected in CO(1-0). These galaxies span a wide range of size and L(FIR)/L(B) ratio, many have multiple-wavelength studies establishing them as starbursts, and some bear a morph...
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| Veröffentlicht in: | Astronomy and astrophysics (Berlin) 1989-11, Vol.225 (1, No), p.27-36 |
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| container_end_page | 36 |
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| container_issue | 1, No |
| container_start_page | 27 |
| container_title | Astronomy and astrophysics (Berlin) |
| container_volume | 225 |
| creator | Verter, F. Rickard, L. J. |
| description | An attempt is made to survey the CO(2-1) emission toward the centers of 17 IR-luminous galaxies which have previously been detected in CO(1-0). These galaxies span a wide range of size and L(FIR)/L(B) ratio, many have multiple-wavelength studies establishing them as starbursts, and some bear a morphological resemblance to M 82. Nine galaxies are detected and useful upper limits are placed on the remaining eight. Using the CO(2-1)/CO(1-0) ratio of antenna temperature as a diagnostic of optical depth, it is found that all of the galaxies contain predominantly optically thick molecular gas. This implies that the phase of starburst during which the molecular gas is optically thin, currently witnessed in M 82, is either uncommon or short-lived. |
| format | Article |
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J.</creatorcontrib><collection>NASA Scientific and Technical Information</collection><collection>NASA Technical Reports Server</collection><collection>Pascal-Francis</collection><jtitle>Astronomy and astrophysics (Berlin)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Verter, F.</au><au>Rickard, L. J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Optical depth of molecular gas in starburst galaxies - Is M82 the prototype?</atitle><jtitle>Astronomy and astrophysics (Berlin)</jtitle><date>1989-11-01</date><risdate>1989</risdate><volume>225</volume><issue>1, No</issue><spage>27</spage><epage>36</epage><pages>27-36</pages><issn>0004-6361</issn><eissn>1432-0746</eissn><coden>AAEJAF</coden><abstract>An attempt is made to survey the CO(2-1) emission toward the centers of 17 IR-luminous galaxies which have previously been detected in CO(1-0). These galaxies span a wide range of size and L(FIR)/L(B) ratio, many have multiple-wavelength studies establishing them as starbursts, and some bear a morphological resemblance to M 82. Nine galaxies are detected and useful upper limits are placed on the remaining eight. Using the CO(2-1)/CO(1-0) ratio of antenna temperature as a diagnostic of optical depth, it is found that all of the galaxies contain predominantly optically thick molecular gas. This implies that the phase of starburst during which the molecular gas is optically thin, currently witnessed in M 82, is either uncommon or short-lived.</abstract><cop>Legacy CDMS</cop><pub>EDP Sciences</pub><tpages>10</tpages></addata></record> |
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| identifier | ISSN: 0004-6361 |
| ispartof | Astronomy and astrophysics (Berlin), 1989-11, Vol.225 (1, No), p.27-36 |
| issn | 0004-6361 1432-0746 |
| language | eng |
| recordid | cdi_pascalfrancis_primary_6659924 |
| source | EDP Sciences; NASA Technical Reports Server; EZB-FREE-00999 freely available EZB journals |
| subjects | Astronomy Astrophysics Earth, ocean, space Exact sciences and technology Quasars. Active or peculiar galaxies, objects, and systems Stellar systems. Galactic and extragalactic objects and systems. The universe |
| title | Optical depth of molecular gas in starburst galaxies - Is M82 the prototype? |
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