New H2O masers in Seyfert and FIR bright galaxies

  title={New H2O masers in Seyfert and FIR bright galaxies},
  author={P. Castangia and Andrea Tarchi and Christian Henkel and K. M. Menten Max-Planck-Institut fuer Radioastronomie and Bonn and INAF-Osservatorio Astronomico di Cagliari and Inaf Istituto di Radioastronomia and Bologna},
  journal={Astronomy and Astrophysics},
Using the Effelsberg 100-m telescope, detections of four extragalactic water vapor masers are reported. Isotropic luminosities are ∼50, 1000, 1 and 230 Lfor Mrk 1066 (UGC 2456), Mrk 34, NGC 3556 and Arp 299, respectively. Mrk 34 contains by far the most distant and one of the most luminous water vapor megamasers so far reported in a Seyfert galaxy. The interacting system Arp 299 appears to show two maser hotspots separated by approximately 20 �� . With these new results and even more recent… 
High Resolution Observations of Molecular Lines in Arp 220: Kinematics, Morphology, and Limits on the Applicability of the Ammonia Thermometer
We observe Arp 220, the nearest Ultra-Luminous Infrared Galaxy (ULIRG), over 4 GHz in the K and Ka bands. We provide constraints for the kinematics,morphology, and identify molecular species on
Opportunities for maser studies with the Square Kilometre Array
  • A. Green, W. Baan
  • Physics
    Proceedings of the International Astronomical Union
  • 2007
Abstract The Square Kilometre Array (SKA) is the radio telescope of the next generation, providing an increase in sensitivity and angular resolution of two orders of magnitude over existing
Radio continuum of galaxies with H$_{2}$O megamaser disks: 33 GHz VLA data
We investigate the nuclear environment of galaxies with observed 22 GHz water megamaser in their subparsec edge-on accretion disks, using 33 GHz (9mm) radio continuum data from VLA, with a resolution
A search for gravitationally lensed water masers in dusty quasars and star-forming galaxies
Luminous extra-galactic water masers are known to be associated with active galactic nuclei and have provided accurate estimates for the mass of the central supermassive black hole and the size and
Extragalactic H2O masers and X-ray absorbing column densities
Having conducted a search for the lambda similar to 1.3 cm (22 GHz) water vapor line towards galaxies with nuclear activity, large nuclear column densities or high infrared luminosities, we present
The innermost region of the water megamaser radio galaxy 3C 403
Context. The standard unified scheme of active galactic nuclei requires the presence of high column densities of gas and dust potentially obscuring the central engine. So far, few direct subarcsecond
ALMA detection of millimetre 183 GHz H2O maser emission in the Superantennae galaxy at z ∼ 0.06
We present the results of ALMA band-5 (∼170 GHz) observations of the merging ultraluminous infrared galaxy, the “Superantennae” (IRAS 19254−7245) at z =0.0617, which has been diagnosed as containing
Second-epoch ALMA Observations of 321 GHz Water Maser Emission in NGC 4945 and the Circinus Galaxy
We present the results of second-epoch ALMA observations of 321 GHz H2O emission toward two nearby active galactic nuclei, NGC 4945 and the Circinus galaxy, together with Tidbinbilla 70 m monitoring
VLBI observations of the H2O gigamaser in TXS 2226-184
Context. Outside the Milky Way the most luminous H2O masers at 22 GHz, called megamasers because of their extreme luminosity with respect to the Galactic and extragalactic H2O masers associated with
Water megamaser emission in hard X-ray selected AGN
Context. Water megamaser emission at 22 GHz has proven to be a powerful tool for astrophysical studies of active galactic nuclei (AGN) because it allows an accurate determination of the mass of the


A Delicate Balance in Amazonia
In their letter “Deforestation in Amazonia” (21 May 2004, p. [1109][1]), W. F. Laurance et al. cogently summarize the threats that roads and other infrastructure development projects pose to
The Geometric Distance and Proper Motion of the Triangulum Galaxy (M33)
These measurements promise a method to determine dynamical models for the Local Group and the mass and dark-matter halos of M31, M33, and the Milky Way.
A Green Bank Telescope Search for Water Masers in Nearby Active Galactic Nuclei
Using the Green Bank Telescope, we have conducted a survey for 1.3 cm water maser emission toward the nuclei of nearby active galaxies, the most sensitive large survey for H2O masers to date. Among
Arp 299: A Second Merging System with Two Active Nuclei?
Recent BeppoSAX observations of Arp 299, a powerful far-IR merging starburst system composed of IC 694 and NGC 3690, clearly unveiled for the first time in this system the presence of a strongly
We have compiled a catalog of disk galaxies that have a double nucleus, through systematic examination of existing catalogs and publications. The Catalog of Double Nucleus Disk Galaxies includes 107
Disks, tori, and cocoons: emission and absorption diagnostics of AGN environments
Abstract One of the most important problems in the study of active galaxies is understanding the detailed geometry, physics, and evolution of the central engines and their environments. The leading
Dust enshrouded star-forming activity in Arp 299
We present mid-infrared spectro-imaging ($5{-}16~\mu$m) observations of the infrared luminous interacting system Arp 299 (= Mrk 171 = IC 694+NGC 3690) obtained with the ISOCAM instrument aboard ISO.
Extragalactic water masers, geometric estimation of H0, and characterization of dark energy
Abstract High precision estimation of the equation of state of dark energy depends on constraints external to analyses of Cosmic Microwave Background fluctuations. A geometric estimation of the local
We report systematic HCN J = 1-0 (and CO) observations of a sample of 53 infrared (IR) and/or CO-bright and/or luminous galaxies, including seven ultraluminous infrared galaxies, nearly 20 luminous
Water vapor in the starburst galaxy NGC 253: A new nuclear maser?
GHz water vapor emission was observed toward the central region of the spiral starburst galaxy NGC 253. Monitoring observations with the 100-m telescope at Effelsberg and measurements with the BnC