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BIMA millimeter-wave observations of the core-jet and molecular gas in the FR I radio galaxy NGC 3801

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dc.contributor.author Das, Mousumi en_US
dc.contributor.author Vogel, Stuart en_US
dc.contributor.author Kleijn, Gijs en_US
dc.contributor.author O’Dea, Christopher en_US
dc.contributor.author Baum, Stefi en_US
dc.date.accessioned 2006-05-04T17:47:51Z en_US
dc.date.available 2006-05-04T17:47:51Z en_US
dc.date.issued 2005-08-20 en_US
dc.identifier.citation Astrophysical Journal 629 (2005) 757-766 en_US
dc.identifier.issn 1538-4365 en_US
dc.identifier.uri http://hdl.handle.net/1850/1745 en_US
dc.description RIT community members may access full-text via RIT Libraries licensed databases: http://library.rit.edu/databases/
dc.description.abstract We present BIMA 3 mm observations of the radio continuum source and the molecular gas disk in the radio loud Fanaroff & Riley Type I (FR I) galaxy NGC 3801. We have detected a continuum source in the nucleus and determined that it has a flat millimeter-wave spectrum, suggesting that the emission is non-thermal and due to an AGN; the radio core is not evident in existing VLA observations. We also map the extended 3 mm emission from the previously known radio jets. In addition, we detect CO (1–0) emission associated with the dust disk observed in previous HST images. A velocity gradient is observed, indicating a two kpc radius rotating gas ring or disk oriented roughly perpendicular to the radio jets. The inferred molecular gas mass of the disk is M(H2) = 3×108M⊙, about 1% of the dynamical mass. We also find a 108 M⊙ molecular gas clump not associated with the gas disk. There is evidence that this gas is associated with a merger and is infalling. This suggests that FR I type activity is related to merger activity, as is thought to be the case for FR II type radio galaxies. We also find indications that one of the radio jets is entraining gas from the infalling molecular gas (Refer to PDF file for exact formulas). en_US
dc.description.sponsorship We thank S. White for very useful discussions, especially regarding the VLA data. Conversations with E. Ostriker, C. Reynolds, and J. Stone were very helpful. We thank the referee for many very constructive comments. Observations with the BIMA millimeter-wave array are partially supported by NSF AST-0228974. This research has made use of the NASA/ IPAC Infrared Science Archive, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. en_US
dc.format.extent 281687 bytes en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.publisher Astrophysical Journal en_US
dc.relation.ispartofseries vol. 629 en_US
dc.relation.ispartofseries no. 2 en_US
dc.relation.ispartofseries pps. 757-766 en_US
dc.subject Galaxies-active en_US
dc.subject Galaxies-individual (NGC 3801) en_US
dc.subject Galaxies-ISM en_US
dc.subject Interstellar-kinematics and dynamics en_US
dc.subject Interstellar-molecules en_US
dc.subject Radio lines-galaxies en_US
dc.title BIMA millimeter-wave observations of the core-jet and molecular gas in the FR I radio galaxy NGC 3801 en_US
dc.type Article en_US
dc.identifier.url http://dx.doi.org/10.1086/431640

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