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

A. Omont; R. Neri; P. Cox; R. Lupu; M. Guélin; P. van der Werf; A. Weiß; R. Ivison; M. Negrello; L. Leeuw; M. Lehnert; I. Smail; A. Verma; A. J. Baker; A. Beelen; J. E. Aguirre; M. Baes; F. Bertoldi; D. L. Clements; A. Cooray; K. Coppin; H. Dannerbauer; G. de Zotti; S. Dye; N. Fiolet; D. Frayer; R. Gavazzi; D. Hughes; M. Jarvis; M. Krips; M. J. Michałowski; E. J. Murphy; D. Riechers; S. Serjeant; A. M. Swinbank; P. Temi; M. Vaccari; J. D. Vieira; R. Auld; B. Buttiglione; A. Cava; A. Dariush; L. Dunne; S. A. Eales; J. Fritz; H. Gomez; E. Ibar; S. Maddox; E. Pascale; M. Pohlen; E. Rigby; D. J. B. Smith; J. Bock; C. M. Bradford; J. Glenn; K. S. Scott; J. Zmuidzinas

doi:10.1051/0004-6361/201116921

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

A. Omont, R. Neri, P. Cox, R. Lupu, M. Guélin, P. van der Werf, A. Weiß, R. Ivison, M. Negrello, L. Leeuw, M. Lehnert, I. Smail, A. Verma, A. J. Baker, A. Beelen, J. E. Aguirre, M. Baes, F. Bertoldi, D. L. Clements, A. CoorayK. Coppin, H. Dannerbauer, G. de Zotti, S. Dye, N. Fiolet, D. Frayer, R. Gavazzi, D. Hughes, M. Jarvis, M. Krips, M. J. Michałowski, E. J. Murphy, D. Riechers, S. Serjeant, A. M. Swinbank, P. Temi, M. Vaccari, J. D. Vieira, R. Auld, B. Buttiglione, A. Cava, A. Dariush, L. Dunne, S. A. Eales, J. Fritz, H. Gomez, E. Ibar, S. Maddox, E. Pascale, M. Pohlen, E. Rigby, D. J. B. Smith, J. Bock, C. M. Bradford, J. Glenn, K. S. Scott, J. Zmuidzinas

School of Physics and Astronomy

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Abstract / Description of output

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 because of its excitation conditions and a tentative detection of the H2O 202-111 emission line (Lupu et al. 2010, ApJ, submitted). We report observations of this line in SDP.17b using the IRAM interferometer equipped with its new 277-371 GHz 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 1.6σ. The intrinsic line luminosity and ratio of H2O(202 - 111)/CO(8 - 7) are comparable with those of the nearby starburst/enshrouded-AGN Mrk 231, and the ratio I(H2O)/LFIR is even higher, 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 probably similar to Mrk 231. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.

Original language	English
Journal	Astronomy & Astrophysics
Volume	530
DOIs	https://doi.org/10.1051/0004-6361/201116921
Publication status	Published - 1 Jun 2011

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10.1051/0004-6361/201116921

http://adsabs.harvard.edu/abs/2011A%26A...530L...3O

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Omont, A., Neri, R., Cox, P., Lupu, R., Guélin, M., van der Werf, P., Weiß, A., Ivison, R., Negrello, M., Leeuw, L., Lehnert, M., Smail, I., Verma, A., Baker, A. J., Beelen, A., Aguirre, J. E., Baes, M., Bertoldi, F., Clements, D. L., ... Zmuidzinas, J. (2011). Observation of H2O in a strongly lensed Herschel-ATLAS source at z = 2.3. Astronomy & Astrophysics, 530. https://doi.org/10.1051/0004-6361/201116921

@article{e650dd34a91b4aa0baab6a710c085c73,

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

abstract = "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 because of its excitation conditions and a tentative detection of the H2O 202-111 emission line (Lupu et al. 2010, ApJ, submitted). We report observations of this line in SDP.17b using the IRAM interferometer equipped with its new 277-371 GHz 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 1.6σ. The intrinsic line luminosity and ratio of H2O(202 - 111)/CO(8 - 7) are comparable with those of the nearby starburst/enshrouded-AGN Mrk 231, and the ratio I(H2O)/LFIR is even higher, 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 probably similar to Mrk 231. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.",

author = "A. Omont and R. Neri and P. Cox and R. Lupu and M. Gu{\'e}lin and {van der Werf}, P. and A. Wei{\ss} and R. Ivison and M. Negrello and L. Leeuw and M. Lehnert and I. Smail and A. Verma and Baker, {A. J.} and A. Beelen and Aguirre, {J. E.} and M. Baes and F. Bertoldi and Clements, {D. L.} and A. Cooray and K. Coppin and H. Dannerbauer and {de Zotti}, G. and S. Dye and N. Fiolet and D. Frayer and R. Gavazzi and D. Hughes and M. Jarvis and M. Krips and Micha{\l}owski, {M. J.} and Murphy, {E. J.} and D. Riechers and S. Serjeant and Swinbank, {A. M.} and P. Temi and M. Vaccari and Vieira, {J. D.} and R. Auld and B. Buttiglione and A. Cava and A. Dariush and L. Dunne and Eales, {S. A.} and J. Fritz and H. Gomez and E. Ibar and S. Maddox and E. Pascale and M. Pohlen and E. Rigby and Smith, {D. J. B.} and J. Bock and Bradford, {C. M.} and J. Glenn and Scott, {K. S.} and J. Zmuidzinas",

year = "2011",

month = jun,

day = "1",

doi = "10.1051/0004-6361/201116921",

language = "English",

volume = "530",

journal = "Astronomy & Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Omont, A, Neri, R, Cox, P, Lupu, R, Guélin, M, van der Werf, P, Weiß, A, Ivison, R, Negrello, M, Leeuw, L, Lehnert, M, Smail, I, Verma, A, Baker, AJ, Beelen, A, Aguirre, JE, Baes, M, Bertoldi, F, Clements, DL, Cooray, A, Coppin, K, Dannerbauer, H, de Zotti, G, Dye, S, Fiolet, N, Frayer, D, Gavazzi, R, Hughes, D, Jarvis, M, Krips, M, Michałowski, MJ, Murphy, EJ, Riechers, D, Serjeant, S, Swinbank, AM, Temi, P, Vaccari, M, Vieira, JD, Auld, R, Buttiglione, B, Cava, A, Dariush, A, Dunne, L, Eales, SA, Fritz, J, Gomez, H, Ibar, E, Maddox, S, Pascale, E, Pohlen, M, Rigby, E, Smith, DJB, Bock, J, Bradford, CM, Glenn, J, Scott, KS & Zmuidzinas, J 2011, 'Observation of H2O in a strongly lensed Herschel-ATLAS source at z = 2.3', Astronomy & Astrophysics, vol. 530. https://doi.org/10.1051/0004-6361/201116921

TY - JOUR

T1 - Observation of H2O in a strongly lensed Herschel-ATLAS source at z = 2.3

AU - Omont, A.

AU - Neri, R.

AU - Cox, P.

AU - Lupu, R.

AU - Guélin, M.

AU - van der Werf, P.

AU - Weiß, A.

AU - Ivison, R.

AU - Negrello, M.

AU - Leeuw, L.

AU - Lehnert, M.

AU - Smail, I.

AU - Verma, A.

AU - Baker, A. J.

AU - Beelen, A.

AU - Aguirre, J. E.

AU - Baes, M.

AU - Bertoldi, F.

AU - Clements, D. L.

AU - Cooray, A.

AU - Coppin, K.

AU - Dannerbauer, H.

AU - de Zotti, G.

AU - Dye, S.

AU - Fiolet, N.

AU - Frayer, D.

AU - Gavazzi, R.

AU - Hughes, D.

AU - Jarvis, M.

AU - Krips, M.

AU - Michałowski, M. J.

AU - Murphy, E. J.

AU - Riechers, D.

AU - Serjeant, S.

AU - Swinbank, A. M.

AU - Temi, P.

AU - Vaccari, M.

AU - Vieira, J. D.

AU - Auld, R.

AU - Buttiglione, B.

AU - Cava, A.

AU - Dariush, A.

AU - Dunne, L.

AU - Eales, S. A.

AU - Fritz, J.

AU - Gomez, H.

AU - Ibar, E.

AU - Maddox, S.

AU - Pascale, E.

AU - Pohlen, M.

AU - Rigby, E.

AU - Smith, D. J. B.

AU - Bock, J.

AU - Bradford, C. M.

AU - Glenn, J.

AU - Scott, K. S.

AU - Zmuidzinas, J.

PY - 2011/6/1

Y1 - 2011/6/1

N2 - 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 because of its excitation conditions and a tentative detection of the H2O 202-111 emission line (Lupu et al. 2010, ApJ, submitted). We report observations of this line in SDP.17b using the IRAM interferometer equipped with its new 277-371 GHz 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 1.6σ. The intrinsic line luminosity and ratio of H2O(202 - 111)/CO(8 - 7) are comparable with those of the nearby starburst/enshrouded-AGN Mrk 231, and the ratio I(H2O)/LFIR is even higher, 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 probably similar to Mrk 231. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.

AB - 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 because of its excitation conditions and a tentative detection of the H2O 202-111 emission line (Lupu et al. 2010, ApJ, submitted). We report observations of this line in SDP.17b using the IRAM interferometer equipped with its new 277-371 GHz 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 1.6σ. The intrinsic line luminosity and ratio of H2O(202 - 111)/CO(8 - 7) are comparable with those of the nearby starburst/enshrouded-AGN Mrk 231, and the ratio I(H2O)/LFIR is even higher, 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 probably similar to Mrk 231. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.

UR - http://www.scopus.com/inward/record.url?scp=79955538816&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201116921

DO - 10.1051/0004-6361/201116921

M3 - Article

SN - 0004-6361

VL - 530

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

ER -

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

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