Skip to main content


Author(s): Gao, F; Braatz, JA; Reid, MJ; Condon, JJ; Greene, Jenny E.; et al

To refer to this page use:
Abstract: As part of the Megamaser Cosmology Project, we present VLBI maps of nuclear water masers toward five galaxies. The masers originate in sub-parsec circumnuclear disks. For three of the galaxies, we fit Keplerian rotation curves to estimate their supermassive black hole (SMBH) masses, and determine (2.9 +/- 0.3) x 10(6)M(Theta) for J0437+2456, (1.7 +/- 0.1) x 10(7)M(Theta) for ESO 558-G009, and (1.1 +/- 0.2) x 10(7)M(Theta) for NGC 5495. In the other two galaxies, Mrk 1029 and NGC 1320, the geometry and dynamics are more complicated and preclude robust black hole mass estimates. Including our new results, we compiled a list of 15 VLBI-confirmed disk maser galaxies with robust SMBH mass measurements. With this sample, we confirm the empirical relation of R-out proportional to 0.3M(SMBH) reported in Wardle & Yusef-Zadeh. We also find a tentative correlation between maser disk outer radii and Wide-Field Infrared Survey Explorer luminosity. We find no correlations of maser disk size with X-ray 2-10 keV luminosity or [O III] luminosity.
Publication Date: 1-Jan-2017
Electronic Publication Date: 29-Dec-2016
Citation: Gao, F, Braatz, JA, Reid, MJ, Condon, JJ, Greene, JE, Henkel, C, Impellizzeri, CMV, Lo, KY, Kuo, CY, Pesce, DW, Wagner, J, Zhao, W. (2017). THE MEGAMASER COSMOLOGY PROJECT. IX. BLACK HOLE MASSES FOR THREE MASER GALAXIES. ASTROPHYSICAL JOURNAL, 834 (10.3847/1538-4357/834/1/52
DOI: doi:10.3847/1538-4357/834/1/52
ISSN: 0004-637X
EISSN: 1538-4357
Related Item:
Type of Material: Journal Article
Journal/Proceeding Title: ASTROPHYSICAL JOURNAL
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.