Observation of H2O in a strongly lensed Herschel-ATLAS source at z=2.3

Autor: P. Temi, J. E. Aguirre, N. Fiolet, Maarten Baes, Enzo Pascale, Axel Weiß, Edo Ibar, Aprajita Verma, M. Krips, Robbie Richard Auld, P. van der Werf, A. Omont, Michael Pohlen, A. M. Swinbank, Andrew J. Baker, Jacopo Fritz, J. J. Bock, Lerothodi Leonard Leeuw, M. Micha lowski, Daniel J. Smith, Dominik Riechers, R. Neri, Rob Ivison, Asantha Cooray, Kimberly S. Scott, Aliakbar Dariush, R. Gavazzi, Antonio Cava, J. Zmuidzinas, Mattia Vaccari, M. D. Lehnert, Loretta Dunne, Andrew I. Harris, E. E. Rigby, G. de Zotti, Eric J. Murphy, Peter Timothy Cox, Helmut Dannerbauer, Simon Dye, Haley Louise Gomez, Roxana Lupu, M. Guélin, Steve Maddox, Stephen Anthony Eales, Matt J. Jarvis, Mattia Negrello, David L. Clements, K. Coppin, C. M. Bradford, David T. Frayer, J. D. Vieira, A. Beelen, Ian Smail, Frank Bertoldi, David P. Hughes, B. Buttiglione, Jason Glenn
Přispěvatelé: Science and Technology Facilities Council (STFC)
Jazyk: angličtina
Rok vydání: 2016
Předmět:
submillimeter: galaxies
APM 08279+5255
Flux
galaxies [submillimeter]
galaxies: starburst
Astrophysics
galaxies [infrared]
Luminosity
galaxies: high-redshift
MOLECULAR GAS EXCITATION
WATER
Emission spectrum
Line (formation)
Physics
starburst [galaxies]
Sigma
Radio lines
galaxies: active
infrared: galaxies
radio lines: galaxies
Astronomy and Astrophysics
Space and Planetary Science
Physical Sciences
active [galaxies]
astro-ph.CO
Infrared
high-redshift [galaxies]
Astrophysics - Cosmology and Nongalactic Astrophysics
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Active
FOS: Physical sciences
Starburst
Astronomy & Astrophysics
MARKARIAN 231
CLOVERLEAF QUASAR
INFRARED GALAXIES
STAR-FORMING GALAXIES
Submillimeter
Science & Technology
INTERSTELLAR-MEDIUM
Galaxies
Redshift
Galaxy
galaxies [radio lines]
0201 Astronomical And Space Sciences
Physics and Astronomy
HIGH-REDSHIFT
EMISSION
Excitation
Zdroj: ASTRONOMY & ASTROPHYSICS
Astronomy & astrophysics, 2011, Vol.530, pp.L3 [Peer Reviewed Journal]
ISSN: 0004-6361
Popis: The Herschel survey, H-ATLAS, with its large areal coverage, has recently discovered a number of bright, strongly lensed high-z submillimeter galaxies. The strong magnification makes it possible to study molecular species other than CO, which are otherwise difficult to observe in high-z galaxies. Among the lensed galaxies already identified by H-ATLAS, the source J090302.9-014127B (SDP.17b) at z = 2.305 is remarkable due to its excitation conditions and a tentative detection of the H2O 202-111 emission line (Lupu et al. 2010). We report observations of this line in SDP.17b using the IRAM interferometer equipped with its new 277- 371GHz receivers. The H2O line is detected at a redshift of z = 2.3049+/-0.0006, with a flux of 7.8+/-0.5 Jy km s-1 and a FWHM of 250+/-60 km s-1. The new flux is 2.4 times weaker than the previous tentative detection, although both remain marginally consistent within 1.6-sigma. The intrinsic line luminosity and ratio of H2O(202-111)/CO8-7 seem comparable with those of the nearby starburst/enshrouded-AGN Mrk 231, suggesting that SDP.17b could also host a luminous AGN. The detection of a strong H2O 202-111 line in SDP.17b implies an efficient excitation mechanism of the water levels that must occur in very dense and warm interstellar gas.
Comment: 5 pages, 1 figure
Databáze: OpenAIRE
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