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

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

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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 2(02)-1(11) 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 1.6 sigma. The intrinsic line luminosity and rati! o of H2O(2(02)-1(11))/CO(8-7) are comparable with those of the nearby starburst/enshrouded-AGN Mrk 231, and the ratio I(H2O)/L-FIR is even higher, suggesting that SDP.17b could also host a luminous AGN. The detection of a strong H2O 2(02)-1(11) 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.

Original language	English
Article number	L3
Journal	Astronomy & Astrophysics
Volume	530
DOIs	https://doi.org/10.1051/0004-6361/201116921
Publication status	Published - 2011

Keywords

galaxies : high-redshift
galaxies : starburst
galaxies : active
infrared : galaxies
submillimeter : galaxies
radio lines : galaxies

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Omont, A., Neri, R., Cox, P., Lupu, R., Guelin, M., van der Werf, P., Weiss, A., Ivison, R. J., Negrello, M., Leeuw, L., Lehnert, M. D., Smail, I., Verma, A., Baker, A. J., Beelen, A., Aguirre, J. E., Baes, M., Bertoldi, F., Clements, D., ... Zmuidzinas, J. (2011). Observation of H2O in a strongly lensed Herschel-ATLAS source at z=2.3. Astronomy & Astrophysics, 530, Article L3. https://doi.org/10.1051/0004-6361/201116921

@article{02ed6b8974c7483c9384249ddbb3b331,

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 2(02)-1(11) 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 1.6 sigma. The intrinsic line luminosity and rati! o of H2O(2(02)-1(11))/CO(8-7) are comparable with those of the nearby starburst/enshrouded-AGN Mrk 231, and the ratio I(H2O)/L-FIR is even higher, suggesting that SDP.17b could also host a luminous AGN. The detection of a strong H2O 2(02)-1(11) 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.",

keywords = "galaxies : high-redshift, galaxies : starburst, galaxies : active, infrared : galaxies, submillimeter : galaxies, radio lines : galaxies",

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

note = "Original article can be found at: http://www.aanda.org/ Copyright The European Southern Observatory",

year = "2011",

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, Guelin, M, van der Werf, P, Weiss, A, Ivison, RJ, Negrello, M, Leeuw, L, Lehnert, MD, Smail, I, Verma, A, Baker, AJ, Beelen, A, Aguirre, JE, Baes, M, Bertoldi, F, Clements, D, Cooray, A, Coppin, K, Dannerbauer, H, de Zotti, G, Dye, S, Fiolet, N, Frayer, D, Gavazzi, R, Hughes, DH, Jarvis, MJ, Krips, M, Michalowski, M, Murphy, E, Riechers, D, Serjeant, S, Swinbank, AM, Temi, P, Vaccari, M, Vieira, J, Auld, R, Buttiglione, B, Cava, A, Dariush, A, Dunne, L, Eales, S, Fritz, J, Gomez, HL, Ibar, E, Maddox, S, Pascale, E, Pohlen, M, Rigby, E, Smith, D, 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, L3. 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 - Guelin, M.

AU - van der Werf, P.

AU - Weiss, A.

AU - Ivison, R.J.

AU - Negrello, M.

AU - Leeuw, L.

AU - Lehnert, M.D.

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.

AU - Cooray, A.

AU - Coppin, Kristen

AU - Dannerbauer, H.

AU - de Zotti, G.

AU - Dye, S.

AU - Fiolet, N.

AU - Frayer, D.

AU - Gavazzi, R.

AU - Hughes, D.H.

AU - Jarvis, M.J.

AU - Krips, M.

AU - Michalowski, M.

AU - Murphy, E.

AU - Riechers, D.

AU - Serjeant, S.

AU - Swinbank, A.M.

AU - Temi, P.

AU - Vaccari, M.

AU - Vieira, J.

AU - Auld, R.

AU - Buttiglione, B.

AU - Cava, A.

AU - Dariush, A.

AU - Dunne, L.

AU - Eales, S.

AU - Fritz, J.

AU - Gomez, H.L.

AU - Ibar, E.

AU - Maddox, S.

AU - Pascale, E.

AU - Pohlen, M.

AU - Rigby, E.

AU - Smith, Daniel

AU - Bock, J.

AU - Bradford, C.M.

AU - Glenn, J.

AU - Scott, K.S.

AU - Zmuidzinas, J.

N1 - Original article can be found at: http://www.aanda.org/ Copyright The European Southern Observatory

PY - 2011

Y1 - 2011

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 2(02)-1(11) 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 1.6 sigma. The intrinsic line luminosity and rati! o of H2O(2(02)-1(11))/CO(8-7) are comparable with those of the nearby starburst/enshrouded-AGN Mrk 231, and the ratio I(H2O)/L-FIR is even higher, suggesting that SDP.17b could also host a luminous AGN. The detection of a strong H2O 2(02)-1(11) 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.

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 2(02)-1(11) 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 1.6 sigma. The intrinsic line luminosity and rati! o of H2O(2(02)-1(11))/CO(8-7) are comparable with those of the nearby starburst/enshrouded-AGN Mrk 231, and the ratio I(H2O)/L-FIR is even higher, suggesting that SDP.17b could also host a luminous AGN. The detection of a strong H2O 2(02)-1(11) 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.

KW - galaxies : high-redshift

KW - galaxies : starburst

KW - galaxies : active

KW - infrared : galaxies

KW - submillimeter : galaxies

KW - radio lines : galaxies

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

M1 - L3

ER -

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

Abstract

Keywords

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