The AGN and Gas Disk in the Low Surface Brightness Galaxy PGC045080

Abstract

We present radio observations and optical spectroscopy of the giant low surface brightness (LSB) galaxy PGC 045080 (or 1300+0144). PGC 045080 is a moderately distant galaxy having a highly inclined optical disk and massive HI gas content. Radio continuum observations of the galaxy were carried out at 320 MHz, 610 MHz and 1.4 GHz. Continuum emission was detected and mapped in the galaxy. The emission appears extended over the inner disk at all three frequencies. At 1.4 GHz and 610 MHz it appears to have two distinct lobes. We also did optical spectroscopy of the galaxy nucleus; the spectrum did not show any strong emission lines associated with AGN activity but the presence of a weak AGN cannot be ruled out. Furthermore, comparison of the H$\alpha$ flux and radio continuum at 1.4 GHz suggests that a significant fraction of the emission is non-thermal in nature. Hence we conclude that a weak or hidden AGN may be present in PGC 045080. The extended radio emission represents lobes/jets from the AGN. These observations show that although LSB galaxies are metal poor and have very little star formation, their centers can host significant AGN activity. We also mapped the HI gas disk and velocity field in PGC 045080. The HI disk extends well beyond the optical disk and appears warped. In the HI intensity maps, the disk appears distinctly lopsided. The velocity field is disturbed on the lopsided side of the disk but is fairly uniform in the other half. We derived the HI rotation curve for the galaxy from the velocity field. The rotation curve has a flat rotation speed of ~ 190 km/s.

arXiv commentPaper contains 14 figures and 4 tables. Figures 8, 10 (color) and 13 supplied separately. Accepted for publication in MNRAS

References in corpus (29)

• Star Formation in Galaxies Along the Hubble Sequence
• The Host Galaxies of AGN
• Theoretical Modeling of Starburst Galaxies
• The Host Galaxies and Classification of Active Galactic Nuclei
• The dark and baryonic matter content of low surface brightness disk galaxies
• A Search for "Dwarf" Seyfert Nuclei. V. Demographics of Nuclear Activity in Nearby Galaxies
• NON-AXISYMMETRIC STRUCTURES IN THE STELLAR DISKS OF GALAXIES
• Emission-line Diagnostics of Low Metallicity AGN
• Lopsided Spiral Galaxies and a Limit on the Galaxy Accretion Rate
• Oxygen Abundances in Low Surface Brightness Disk Galaxies
• Lopsided spiral galaxies: evidence for gas accretion
• The WARPS X-ray survey of galaxies, groups and clusters I: Method and first results
• Structural Characteristics and Stellar Composition of Low Surface Brightness Disk Galaxies
• Kinematically Lopsided Spiral Galaxies
• The Morphology of Low Surface Brightness Disk Galaxies
• Oxygen Abundances and Chemical Evolution in Low Surface Brightness Galaxies
• A model for lopsided galactic disks
• HI Observations of Giant Low Surface Brightness Galaxies
• CO Detection and Millimeter Continuum Emission from Low Surface Brightness Galaxies
• The kinematics of lopsided galaxies
• Detections of CO in Late-Type, Low Surface Brightness Spiral Galaxies
• CO Detections of Edge-On Low Surface Brightness Galaxies
• Properties of Low Surface Brightness Galaxies and Normal Spirals in the Near-IR
• Origin of Disc Lopsidedness in the Eridanus Group of Galaxies
• First Detection of CO in a Low Surface Brightness Galaxy
• Further Discoveries of 12CO in Low Surface Brightness Galaxies
• Millimeter Wave Observations of the Core-Jet and Molecular Gas in the FR I Radio Galaxy NGC 3801
• Evidence for a Large Stellar Bar in the LSB Galaxy UGC 7321
• Properties of Molecular Gas in Massive Low Surface Brightness Galaxies, Including New 12CO Observations of Three Malin 1 `Cousins'

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