JPL Technical Report Server

The Starburst-AGN Connection: A Sensitive VLBI Survey of Luminous IRAS Galaxies

Show simple item record

dc.contributor.author Lonsdale, Colin J. en_US
dc.contributor.author Smith, Harding E. en_US
dc.contributor.author Lonsdale, Carol J. en_US
dc.date.accessioned 2004-10-06T17:31:21Z
dc.date.available 2004-10-06T17:31:21Z
dc.date.issued 1992-09-08 en_US
dc.identifier.citation The Astrophysical Journal en_US
dc.identifier.clearanceno 92-1746 en_US
dc.identifier.uri http://hdl.handle.net/2014/36686
dc.description.abstract Results of an 18 cm VLBI survey of 31 luminous (L_(fir) greater than 10^(11.25)L dot circle),radio-compact (theta less than approximately 0."25) infrared galaxies are presented. Over half thesample galaxies show high-brightness temperature emission, with T_b greater than 10^5K andstructure on scales of 5 - 150 mas. The median VLBI core power for detected sources is log P_(core)= 22.0(WHz^(-1)0, and the ratio of core to total 1.6 GHz flux density less than S_(core)/S_(total)greater than = 0.12. The limits for non- detected sources are similar, consistent with a picture inwhich all the galaxies have compact cores at a level of a few percent of the total radio flux density. Characteristics of the extended radio structure, infrared properties and optical excitation are not goodindicators of the detectability of VLBI-scale emission. Structural information and energeticconsiderations rule out a single supernova interpretation of the compact emission in these galaxies,though we cannot exclude the possibility of several simultaneous extraordinarily luminous radiosupernovae within the central few hundred pc^3. Our results instead favor the presence of an AGNobscured by starburst-related dust. en_US
dc.language.iso en_US
dc.title The Starburst-AGN Connection: A Sensitive VLBI Survey of Luminous IRAS Galaxies en_US


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search


Browse

My Account