2006/10/30 by A. Tarchi, P. Castangia, C. Henkel +1 · 19 citations
Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Emission spectrum #Galaxies: Formation, Evolution, Phenomena #Gamma-ray bursts and supernovae #Line (geometry) #Maser #Megamaser #Physics #Spectral line #astro-ph
paper · pdf · doi:10.1016/j.newar.2006.11.011
published in New Astronomy Reviews 51(1-2), 67-70 (Elsevier BV) · 7 pages, 2 figures. To appear on New Astronomy Reviews, v. 51 eds. Morganti, Oosterloo, Villar-Martin & van Gorkom. Needs elsart.cls
arxiv created 2006/10/30 · openalex publication_date 2006/12/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present preliminary results of an interferometric study of the water megamaser in the merger system Arp299. This system is composed of two main sources: IC694 and NGC3690. There is clear evidence that most of the water maser emission is associated with the nucleus of the latter, confirming the presence of an optically obscured AGN as previously suggested by X-ray observations. Furthermore, emission arises from the inner regions of IC694, where an OH megamaser is also present. The velocity of the water maser line is blueshifted w.r.t. the optically determined systemic velocity and is consistent with that of the OH megamaser line. This finding might then indicate that both masers are associated with the same (expanding) structure and that, for the first time, strong 22 GHz water and 1.67 GHz OH maser emission has been found to coexist.