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Detection of the 158 μm [c II] transition atz= 1.3: evidence for a galaxy-wide starburst

Hailey-Dunsheath, S., Nikola, T., Stacey, G. J., Oberst, T. E., Parshley, S. C., Benford, D. J., Staguhn, J. G. and Tucker, Carole 2010. Detection of the 158 μm [c II] transition atz= 1.3: evidence for a galaxy-wide starburst. The Astrophysical Journal 714 (1) , L162. 10.1088/2041-8205/714/1/L162

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We report the detection of 158 μm [C II] fine-structure line emission from MIPS J142824.0+352619, a hyperluminous (L IR ~ 1013 L ) starburst galaxy at z = 1.3. The line is bright, corresponding to a fraction L [C II]/L FIR 2 × 10–3 of the far-IR (FIR) continuum. The [C II], CO, and FIR continuum emission may be modeled as arising from photodissociation regions (PDRs) that have a characteristic gas density of n ~ 104.2 cm–3, and that are illuminated by a far-UV radiation field ~103.2 times more intense than the local interstellar radiation field. The mass in these PDRs accounts for approximately half of the molecular gas mass in this galaxy. The L [C II]/L FIR ratio is higher than observed in local ultraluminous infrared galaxies or in the few high-redshift QSOs detected in [C II], but the L [C II]/L FIR and L CO/L FIR ratios are similar to the values seen in nearby starburst galaxies. This suggests that MIPS J142824.0+352619 is a scaled-up version of a starburst nucleus, with the burst extended over several kiloparsecs.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: galaxies: high-redshift; galaxies: individual (MIPS J142824.0+352619); galaxies: ISM; galaxies: starburst; infrared: galaxies; submillimeter: general
Publisher: Institute of Physics
ISSN: 2041-8205
Last Modified: 04 Jun 2017 02:00

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