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Herschel-ATLAS: Blazars in the Science Demonstration Phase field

González-Nuevo, J., De Zotti, G., Andreani, P., Barton, E. J., Bertoldi, F., Birkinshaw, M., Bonavera, L., Buttiglione, S., Cooke, J., Cooray, A., Danese, G., Dunne, L., Eales, Stephen Anthony, Fan, L., Jarvis, M. J., Klöckner, H.-R., Hatziminaoglou, E., Herranz, D., Hughes, D. H., Lapi, A., Lawrence, A., Leeuw, L., Lopez-Caniego, M., Massardi, M., Mauch, T., Michałowski, M. J., Negrello, M., Rawlings, S., Rodighiero, G., Samui, S., Serjeant, S., Vieira, J. D., White, G., Amblard, A., Auld, Robbie, Baes, M., Bonfield, D. G., Burgarella, D., Cava, A., Clements, D. L., Dariush, Aliakbar, Dye, Simon, Frayer, D., Fritz, J., Ibar, E., Ivison, R. J., Lagache, G., Maddox, S., Pascale, Enzo, Pohlen, Michael, Rigby, E., Sibthorpe, B., Smith, D. J. B., Temi, P., Thompson, M., Valtchanov, I. and Verma, A. 2010. Herschel-ATLAS: Blazars in the Science Demonstration Phase field. Astronomy and Astrophysics 518 , L38. 10.1051/0004-6361/201014637

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Abstract

To investigate the poorly constrained sub-mm counts and spectral properties of blazars we searched for these in the Herschel-ATLAS (H-ATLAS) science demonstration phase (SDP) survey catalog.

We cross-matched 500 μm sources brighter than 50 mJy with the FIRST radio catalogue. We found two blazars, both previously known. Our study is among the first blind blazar searches at sub-mm wavelengths, i.e., in the spectral regime where little is still known about the blazar SEDs, but where the synchrotron peak of the most luminous blazars is expected to occur. Our early results are consistent with educated extrapolations of lower frequency counts and question indications of substantial spectral curvature downwards and of spectral upturns at mm wavelengths. One of the two blazars is identified with a Fermi/LAT γ-ray source and a WMAP source. The physical parameters of the two blazars are briefly discussed. These observations demonstrate that the H-ATLAS survey will provide key information about the physics of blazars and their contribution to sub-mm counts.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Neuroscience and Mental Health Research Institute (NMHRI)
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: BL Lacertae objects: general, quasars: general, submillimeter: general
Publisher: EDP Sciences
ISSN: 0004-6361
Last Modified: 06 Dec 2017 22:24
URI: http://orca-mwe.cf.ac.uk/id/eprint/20040

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