Molecular Co(1-0) gas in the z ∼ 2 radio galaxy MRC0152-209

B. H C Emonts; I. Feain; M. Y. Mao; R. P. Norris; G. Miley; R. D. Ekers; M. Villar-Martín; H. J A Röttgering; E. M. Sadler; G. Rees; R. Morganti; D. J. Saikia; T. A. Oosterloo; J. B. Stevens; C. N. Tadhunter

doi:10.1088/2041-8205/734/1/L25

Molecular Co(1-0) gas in the z ∼ 2 radio galaxy MRC0152-209

B. H C Emonts, I. Feain, M. Y. Mao, R. P. Norris, G. Miley, R. D. Ekers, M. Villar-Martín, H. J A Röttgering, E. M. Sadler, G. Rees, R. Morganti, D. J. Saikia, T. A. Oosterloo, J. B. Stevens, C. N. Tadhunter

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Abstract

We report the detection of molecular CO(1-0) gas in the high-z radio galaxy MRC0152-209 (z = 1.92) with the Australia Telescope Compact Array Broadband Backend (ATCA/CABB). This is the third known detection of CO(1-0) in a high-z radio galaxy to date. CO(1-0) is the most robust tracer of the overall molecular gas content (including the widespread, low-density, and sub-thermally excited component), hence observations of CO(1-0) are crucial for studying galaxy evolution in the early universe. We derive L′_CO = 6.6 2.0 × 10¹⁰ K km s^-1 pc² for MRC0152-209, which is comparable to that derived from CO(1-0) observations of several high-z submillimeter and star-forming BzK galaxies. The CO(1-0) traces a total molecular hydrogen mass of = 5 × 10¹⁰ (α_x/0.8) _M. MRC0152-209 is an infrared bright radio galaxy, in which a large reservoir of cold molecular gas has not (yet) been depleted by star formation or radio source feedback. Its compact radio source is reliably detected at 40 GHz and has a steep spectral index of α = -1.3 between 1.4 and 40 GHz (4-115 GHz in the galaxy's rest frame). MRC0152-209 is part of an ongoing systematic ATCA/CABB survey of CO(1-0) in high-z radio galaxies between 1.7 < z < 3.

Original language	English
Article number	L25
Pages (from-to)	1-5
Number of pages	5
Journal	Astrophysical Journal Letters
Volume	734
Issue number	1 PART 2
DOIs	https://doi.org/10.1088/2041-8205/734/1/L25
Publication status	Published - 10 Jun 2011
Externally published	Yes

Keywords

galaxies: active
galaxies: evolution
galaxies: high-redshift
galaxies: individual (MRC 0152-209)
galaxies: ISM
radio lines: ISM

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10.1088/2041-8205/734/1/L25

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Emonts, B. H. C., Feain, I., Mao, M. Y., Norris, R. P., Miley, G., Ekers, R. D., Villar-Martín, M., Röttgering, H. J. A., Sadler, E. M., Rees, G., Morganti, R., Saikia, D. J., Oosterloo, T. A., Stevens, J. B., & Tadhunter, C. N. (2011). Molecular Co(1-0) gas in the z ∼ 2 radio galaxy MRC0152-209. Astrophysical Journal Letters, 734(1 PART 2), 1-5. Article L25. https://doi.org/10.1088/2041-8205/734/1/L25

@article{deb3d801fd8c411e942fad61e48848c4,

title = "Molecular Co(1-0) gas in the z ∼ 2 radio galaxy MRC0152-209",

abstract = "We report the detection of molecular CO(1-0) gas in the high-z radio galaxy MRC0152-209 (z = 1.92) with the Australia Telescope Compact Array Broadband Backend (ATCA/CABB). This is the third known detection of CO(1-0) in a high-z radio galaxy to date. CO(1-0) is the most robust tracer of the overall molecular gas content (including the widespread, low-density, and sub-thermally excited component), hence observations of CO(1-0) are crucial for studying galaxy evolution in the early universe. We derive L′CO = 6.6 2.0 × 1010 K km s-1 pc2 for MRC0152-209, which is comparable to that derived from CO(1-0) observations of several high-z submillimeter and star-forming BzK galaxies. The CO(1-0) traces a total molecular hydrogen mass of = 5 × 1010 (αx/0.8) M. MRC0152-209 is an infrared bright radio galaxy, in which a large reservoir of cold molecular gas has not (yet) been depleted by star formation or radio source feedback. Its compact radio source is reliably detected at 40 GHz and has a steep spectral index of α = -1.3 between 1.4 and 40 GHz (4-115 GHz in the galaxy's rest frame). MRC0152-209 is part of an ongoing systematic ATCA/CABB survey of CO(1-0) in high-z radio galaxies between 1.7 < z < 3.",

keywords = "galaxies: active, galaxies: evolution, galaxies: high-redshift, galaxies: individual (MRC 0152-209), galaxies: ISM, radio lines: ISM",

author = "Emonts, {B. H C} and I. Feain and Mao, {M. Y.} and Norris, {R. P.} and G. Miley and Ekers, {R. D.} and M. Villar-Mart{\'i}n and R{\"o}ttgering, {H. J A} and Sadler, {E. M.} and G. Rees and R. Morganti and Saikia, {D. J.} and Oosterloo, {T. A.} and Stevens, {J. B.} and Tadhunter, {C. N.}",

year = "2011",

month = jun,

day = "10",

doi = "10.1088/2041-8205/734/1/L25",

language = "English",

volume = "734",

pages = "1--5",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

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Emonts, BHC, Feain, I, Mao, MY, Norris, RP, Miley, G, Ekers, RD, Villar-Martín, M, Röttgering, HJA, Sadler, EM, Rees, G, Morganti, R, Saikia, DJ, Oosterloo, TA, Stevens, JB & Tadhunter, CN 2011, 'Molecular Co(1-0) gas in the z ∼ 2 radio galaxy MRC0152-209', Astrophysical Journal Letters, vol. 734, no. 1 PART 2, L25, pp. 1-5. https://doi.org/10.1088/2041-8205/734/1/L25

TY - JOUR

T1 - Molecular Co(1-0) gas in the z ∼ 2 radio galaxy MRC0152-209

AU - Emonts, B. H C

AU - Feain, I.

AU - Mao, M. Y.

AU - Norris, R. P.

AU - Miley, G.

AU - Ekers, R. D.

AU - Villar-Martín, M.

AU - Röttgering, H. J A

AU - Sadler, E. M.

AU - Rees, G.

AU - Morganti, R.

AU - Saikia, D. J.

AU - Oosterloo, T. A.

AU - Stevens, J. B.

AU - Tadhunter, C. N.

PY - 2011/6/10

Y1 - 2011/6/10

N2 - We report the detection of molecular CO(1-0) gas in the high-z radio galaxy MRC0152-209 (z = 1.92) with the Australia Telescope Compact Array Broadband Backend (ATCA/CABB). This is the third known detection of CO(1-0) in a high-z radio galaxy to date. CO(1-0) is the most robust tracer of the overall molecular gas content (including the widespread, low-density, and sub-thermally excited component), hence observations of CO(1-0) are crucial for studying galaxy evolution in the early universe. We derive L′CO = 6.6 2.0 × 1010 K km s-1 pc2 for MRC0152-209, which is comparable to that derived from CO(1-0) observations of several high-z submillimeter and star-forming BzK galaxies. The CO(1-0) traces a total molecular hydrogen mass of = 5 × 1010 (αx/0.8) M. MRC0152-209 is an infrared bright radio galaxy, in which a large reservoir of cold molecular gas has not (yet) been depleted by star formation or radio source feedback. Its compact radio source is reliably detected at 40 GHz and has a steep spectral index of α = -1.3 between 1.4 and 40 GHz (4-115 GHz in the galaxy's rest frame). MRC0152-209 is part of an ongoing systematic ATCA/CABB survey of CO(1-0) in high-z radio galaxies between 1.7 < z < 3.

AB - We report the detection of molecular CO(1-0) gas in the high-z radio galaxy MRC0152-209 (z = 1.92) with the Australia Telescope Compact Array Broadband Backend (ATCA/CABB). This is the third known detection of CO(1-0) in a high-z radio galaxy to date. CO(1-0) is the most robust tracer of the overall molecular gas content (including the widespread, low-density, and sub-thermally excited component), hence observations of CO(1-0) are crucial for studying galaxy evolution in the early universe. We derive L′CO = 6.6 2.0 × 1010 K km s-1 pc2 for MRC0152-209, which is comparable to that derived from CO(1-0) observations of several high-z submillimeter and star-forming BzK galaxies. The CO(1-0) traces a total molecular hydrogen mass of = 5 × 1010 (αx/0.8) M. MRC0152-209 is an infrared bright radio galaxy, in which a large reservoir of cold molecular gas has not (yet) been depleted by star formation or radio source feedback. Its compact radio source is reliably detected at 40 GHz and has a steep spectral index of α = -1.3 between 1.4 and 40 GHz (4-115 GHz in the galaxy's rest frame). MRC0152-209 is part of an ongoing systematic ATCA/CABB survey of CO(1-0) in high-z radio galaxies between 1.7 < z < 3.

KW - galaxies: active

KW - galaxies: evolution

KW - galaxies: high-redshift

KW - galaxies: individual (MRC 0152-209)

KW - galaxies: ISM

KW - radio lines: ISM

UR - http://www.scopus.com/inward/record.url?scp=79959386942&partnerID=8YFLogxK

U2 - 10.1088/2041-8205/734/1/L25

DO - 10.1088/2041-8205/734/1/L25

M3 - Article

AN - SCOPUS:79959386942

SN - 2041-8205

VL - 734

SP - 1

EP - 5

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1 PART 2

M1 - L25

ER -

Molecular Co(1-0) gas in the z ∼ 2 radio galaxy MRC0152-209

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Keywords

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