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Oxford University Press, Monthly Notices of the Royal Astronomical Society, 4(446), p. 4176-4185, 2014

DOI: 10.1093/mnras/stu2302

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J1649+2635: A Grand-Design Spiral with a Large Double-Lobed Radio Source

This paper is available in a repository.
This paper is available in a repository.

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Postprint: archiving allowed
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Data provided by SHERPA/RoMEO

Abstract

We report the discovery of a grand-design spiral galaxy associated with a double-lobed radio source. J1649+2635 (z = 0.0545) is a red spiral galaxy with a prominent bulge that it is associated with a L$_{1.4{\rm GHz}}∼$10$^{24}$WHz$^{-1}$ double-lobed radio source that spans almost 100kpc. J1649+2635 has a black hole mass of M$_{\rm BH} ∼$ 3--7 $\times$ 10$^8$M$_{⊙}$ and SFR$∼$ 0.26 -- 2.6M$_{⊙}$year$^{-1}$. The galaxy hosts a $∼$96kpc diffuse optical halo, which is unprecedented for spiral galaxies. We find that J1649+2635 resides in an overdense environment with a mass of M$_{dyn} = 7.7^{+7.9}_{-4.3} \times 10^{13}$M$_{⊙}$, likely a galaxy group below the detection threshold of the ROSAT All-Sky Survey. We suggest one possible scenario for the association of double-lobed radio emission from J1649+2635 is that the source may be similar to a Seyfert galaxy, located in a denser-than-normal environment. The study of spiral galaxies that host large-scale radio emission is important because although rare in the local Universe, these sources may be more common at high-redshifts. ; Comment: 11 pages, 9 figures, Accepted for publication in MNRAS