Circumnuclear Molecular Gas In Megamaser Disk Galaxies NGC 4388 And NGC 1194

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dc.contributor.utaustinauthorWalsh, Jonelleen_US
dc.creatorGreene, Jenny E.en_US
dc.creatorSeth, Anilen_US
dc.creatorLyubenova, Mariyaen_US
dc.creatorWalsh, Jonelleen_US
dc.creatorvan de Ven, Glennen_US
dc.creatorLasker, Ronalden_US
dc.date.accessioned2016-04-28T19:42:23Z
dc.date.available2016-04-28T19:42:23Z
dc.date.issued2014-06en
dc.description.abstractWe explore the warm molecular and ionized gas in the centers of two megamaser disk galaxies using K-band spectroscopy. Our ultimate goal is to determine how gas is funneled onto the accretion disk, here traced by megamaser spots on sub-parsec scales. We present NIR IFU data with a resolution of similar to 50 pc for two galaxies: NGC 4388 with VLT/SINFONI and NGC 1194 with Keck/OSIRIS+AO. The high spatial resolution and rich spectral diagnostics allow us to study both the stellar and gas kinematics as well as gas excitation on scales only an order of magnitude larger than the maser disk. We find a drop in the stellar velocity dispersion in the inner similar to 100 pc of NGC 4388, a common signature of a dynamically cold central component seen in many active nuclei. We also see evidence for noncircular gas motions in the molecular hydrogen on similar scales, with the gas kinematics on 100 parsec scales aligned with the megamaser disk. In contrast, the high ionization lines and Br gamma trace outflow along the 100 parsec-scale jet. In NGC 1194, the continuum from the accreting black hole is very strong, making it difficult to measure robust two-dimensional kinematics, but the spatial distribution and line ratios of the molecular hydrogen and Br gamma have consistent properties between the two galaxies.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipNSF Astronomy and Astro-physics Postdoctoral Fellowship 1102845en_US
dc.description.sponsorshipW. M. Keck Foundationen_US
dc.description.sponsorshipNSFen_US
dc.description.sponsorshipNOAO, through the Telescope System Instrumentation Program (TSIP)en_US
dc.identifierdoi:10.15781/T2RJ9T
dc.identifier.Filename2014_06_circumnuclearmolecular.pdfen_US
dc.identifier.citationGreene, Jenny E., Anil Seth, Mariya Lyubenova, Jonelle Walsh, Glenn van de Ven, and Ronald L�sker. "Circumnuclear Molecular Gas in Megamaser Disk Galaxies NGC 4388 and NGC 1194." The Astrophysical Journal, Vol. 788, No. 2 (Jun., 2014): 145.en_US
dc.identifier.doi10.1088/0004-637x/788/2/145en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/35138
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialAstrophysical Journalen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.rights.restrictionOpenen_US
dc.subjectgalaxies: ismen_US
dc.subjectgalaxies: nucleien_US
dc.subjectgalaxies: seyferten_US
dc.subjectactive galactic nucleien_US
dc.subjectintegral-field spectroscopyen_US
dc.subjectnear-infrareden_US
dc.subjectspectroscopyen_US
dc.subjecthubble-space-telescopeen_US
dc.subjectseyfert 2 galaxiesen_US
dc.subjectstellaren_US
dc.subjectvelocity dispersionsen_US
dc.subjectsupermassive black-holesen_US
dc.subjectadaptive optics systemen_US
dc.subjectline-strength mapsen_US
dc.subjectvirgo clusteren_US
dc.subjectastronomy & astrophysicsen_US
dc.titleCircumnuclear Molecular Gas In Megamaser Disk Galaxies NGC 4388 And NGC 1194en_US
dc.typeArticleen_US

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