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An expanded very large array search for water megamaser emission in the submm galaxy SMM J16359+6612 AT z = 2.5
David Hughes
Acceso Abierto
Atribución-NoComercial-SinDerivadas
Cosmology: observations
Galaxies: starburst
Gravitational lensing
Masers
Using the Expanded Very Large Array, we have conducted a search for 22.2 GHz H₂O megamaser emission in the strongly lensed submm galaxy, SMM J16359+6612 at z = 2.517. This object is lensed into three components, and after a correction for magnification is applied to its submm-wavelength flux density, it is typical of the bulk of the high-redshift, submm galaxy population responsible for the 850 μm extragalactic background (S₈₅₀μm ∼1 mJy). We do not detect any H₂O megamaser emission, but the lensing allows us to place an interesting constraint on the luminosity of any megamasers present, L🇭₂🇴 <5305L⊚ for an assumed linewidth of 80 km s⁻¹. Because the far-infrared luminosity in submm galaxies is mainly powered by star formation, and very luminous H₂O megamasers are more commonly associated with quasar activity, it could be that blind searches for H₂O megamasers will not be an effective means of determining redshifts for less-luminous members of the submm galaxy population.
The Astronomical Journal
2009
Artículo
Inglés
Estudiantes
Investigadores
Público en general
Edmonds, R., et al., (2009). An expanded very large array search for water megamaser emission in the submm galaxy SMM J16359+6612 AT z = 2.5, The Astronomical Journal. Vol.137(2):3293–3296.
ASTRONOMÍA Y ASTROFÍSICA
Versión aceptada
acceptedVersion - Versión aceptada
Appears in Collections:Artículos de Astrofísica

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