DETECTION OF ATOMIC CARBON [C II] 158 {mu}m AND DUST EMISSION FROM A z 7.1 QUASAR HOST GALAXY
- Max-Planck Institute for Astronomy, Koenigstuhl 17, 69117 Heidelberg (Germany)
- Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA (United Kingdom)
- Institut de Radioastronomie Millimetrique, 300 rue de la Piscine, 38406 Saint Martin d'Heres (France)
- Astrophysics Group, Imperial College London, Blackett Laboratory, Prince Consort Road, London, SW7 2AZ (United Kingdom)
- Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead, CH41 1LD (United Kingdom)
Using the IRAM Plateau de Bure Interferometer, we report the detection of the 158 {mu}m [C II] emission line and underlying dust continuum in the host galaxy of the quasar ULAS J112001.48+064124.3 (hereafter J1120+0641) at z 7.0842 {+-} 0.0004. This is the highest redshift detection of the [C II] line to date, and allows us to put the first constraints on the physical properties of the host galaxy of J1120+0641. The [C II] line luminosity is 1.2 {+-} 0.2 Multiplication-Sign 10{sup 9} L{sub Sun }, which is a factor {approx}4 lower than observed in a luminous quasar at z = 6.42 (SDSS J1148+5251). The underlying far-infrared (FIR) continuum has a flux density of 0.61 {+-} 0.16 mJy, similar to the average flux density of z {approx} 6 quasars that were not individually detected in the rest-frame FIR. Assuming that the FIR luminosity of L{sub FIR} = 5.8 Multiplication-Sign 10{sup 11}-1.8 Multiplication-Sign 10{sup 12} L{sub Sun} is mainly powered by star formation, we derive a star formation rate in the range 160-440 M{sub Sun} yr{sup -1} and a total dust mass in the host galaxy of 6.7 Multiplication-Sign 10{sup 7}-5.7 Multiplication-Sign 10{sup 8} M{sub Sun} (both numbers have significant uncertainties given the unknown nature of dust at these redshifts). The [C II] line width of {sigma}{sub V} = 100 {+-} 15 km s{sup -1} is among the smallest observed when compared to the molecular line widths detected in z {approx} 6 quasars. Both the [C II] and dust continuum emission are spatially unresolved at the current angular resolution of 2.0 Multiplication-Sign 1.7 arcsec{sup 2} (corresponding to 10 Multiplication-Sign 9 kpc{sup 2} at the redshift of J1120+0641).
- OSTI ID:
- 22047797
- Journal Information:
- Astrophysical Journal Letters, Vol. 751, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 2041-8205
- Country of Publication:
- United States
- Language:
- English
Similar Records
HUBBLE SPACE TELESCOPE NARROWBAND SEARCH FOR EXTENDED Ly{alpha} EMISSION AROUND TWO z > 6 QUASARS
[C II] LINE EMISSION IN MASSIVE STAR-FORMING GALAXIES AT z = 4.7