SIMBAD references

2014MNRAS.445..330H - Mon. Not. R. Astron. Soc., 445, 330-346 (2014/November-3)

The First Murchison Widefield Array low-frequency radio observations of cluster scale non-thermal emission: the case of Abell 3667.

HINDSON L., JOHNSTON-HOLLITT M., HURLEY-WALKER N., BUCKLEY K., MORGAN J., CARRETTI E., DWARAKANATH K.S., BELL M., BERNARDI G., BHAT N.D.R., BOWMAN J.D., BRIGGS F., CAPPALLO R.J., COREY B.E., DESHPANDE A.A., EMRICH D., EWALL-WICE A., FENG L., GAENSLER B.M., GOEKE R., GREENHILL L.J., HAZELTON B.J., JACOBS D., KAPLAN D.L., KASPER J.C., KRATZENBERG E., KUDRYAVTSEVA N., LENC E., LONSDALE C.J., LYNCH M.J., McWHIRTER S.R., McKINLEY B., MITCHELL D.A., MORALES M.F., MORGAN E., OBEROI D., ORD S.M., PINDOR B., PRABU T., PROCOPIO P., OFFRINGA A.R., RIDING J., ROGERS A.E.E., ROSHI A., UDAYA SHANKAR N., SRIVANI K.S., SUBRAHMANYAN R., TINGAY S.J., WATERSON M., WAYTH R.B., WEBSTER R.L., WHITNEY A.R., WILLIAMS A. and WILLIAMS C.L.

Abstract (from CDS):

We present the first Murchison Widefield Array observations of the well-known cluster of galaxies Abell 3667 (A3667) between 105 and 241MHz. A3667 is one of the best known examples of a galaxy cluster hosting a double radio relic and has been reported to contain a faint radio halo and bridge. The origin of radio haloes, relics and bridges is still unclear, however galaxy cluster merger seems to be an important factor. We clearly detect the north-west (NW) and south-east radio relics in A3667 and find an integrated flux density at 149MHz of 28.1±1.7 and 2.4±0.1Jy, respectively, with an average spectral index, between 120 and 1400MHz, of -0.9±0.1 for both relics. We find evidence of a spatial variation in the spectral index across the NW relic steepening towards the centre of the cluster, which indicates an ageing electron population. These properties are consistent with higher frequency observations. We detect emission that could be associated with a radio halo and bridge. However, due to the presence of poorly sampled large-scale Galactic emission and blended point sources we are unable to verify the exact nature of these features.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): galaxies: clusters: individual: A3667 - radio continuum: galaxies

Status at CDS : Examining the need for a new acronym.

Simbad objects: 27

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