New water masers in Seyfert and FIR bright galaxies. II

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dc.creatorCastangia, P.
dc.creatorTarchi, A.
dc.creatorHenkel, C.
dc.creatorMenten, K. M.
dc.date2007-12-05
dc.date.accessioned2026-07-07T08:47:26Z
dc.date.available2026-07-07T08:47:26Z
dc.descriptionRecently, a relationship between the water maser detection rate and far infrared (FIR) flux density has been found as a result of a 22 GHz maser survey in a sample comprised of northern galaxies with 100 micron flux density > 50 Jy and a declination >-30 degrees. The survey has been extended toward galaxies with lower FIR flux densities in order to confirm this correlation and to discover additional maser sources for relevant follow-up interferometric studies. A sample of 41 galaxies with 30 Jy < S(100 micron) < 50 Jy and Dec. > -30 degrees was observed with the 100-m telescope at Effelsberg in a search for the 22 GHz water vapor line. The average 3-sigma noise level of the survey is 40 mJy for a 1 km/s channel, corresponding to a detection threshold for the isotropic maser luminosity of about 0.5 solar luminosities at a distance of 25 Mpc. Two detections are reported: a megamaser with an isotropic luminosity of approximately 35 solar luminosities in the Seyfert/HII galaxy NGC613 and a kilomaser of approximately 1 solar luminosity in the merger system NGC520.[abridged]
dc.description12 pages, 9 figures, accepted by Astronomy and Astrophysics
dc.identifierhttps://arxiv.org/abs/0712.0709
dc.identifierhttp://arxiv.org/abs/0712.0709
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/143597
dc.subjectAstrophysics
dc.titleNew water masers in Seyfert and FIR bright galaxies. II
dc.typetext

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