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Constraints on high...
Constraints on high-J CO emission lines in z similar to 6 quasars
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- Carniani, S. (författare)
- Scuola Normale Super Pisa, Piazza Cavalieri 7, I-56126 Pisa, Italy.
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- Gallerani, S. (författare)
- Scuola Normale Super Pisa, Piazza Cavalieri 7, I-56126 Pisa, Italy.
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- Vallini, Livia (författare)
- Stockholms universitet,Nordiska institutet för teoretisk fysik (Nordita),Leiden Observatory, The Netherlands,Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands.;Nordita SU
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- Pallottini, A. (författare)
- Scuola Normale Super Pisa, Piazza Cavalieri 7, I-56126 Pisa, Italy.;Museo Stor Fis, Ctr Fermi, Piazza Viminale 1, I-00184 Rome, Italy.;Ctr Studi & Ric Enrico Fermi, Piazza Viminale 1, I-00184 Rome, Italy.
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- Tazzari, M. (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.
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- Ferrara, A. (författare)
- Scuola Normale Super Pisa, Piazza Cavalieri 7, I-56126 Pisa, Italy.
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- Maiolino, R. (författare)
- Univ Cambridge, Kavli Inst Cosmol, Madingley Rd, Cambridge CB3 0HA, England.;Univ Cambridge, Cavendish Lab, 19 JJ Thomson Ave, Cambridge CB3 0HE, England.
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- Cicone, C. (författare)
- INAF Osservatorio Astron Brera, Via Brera 28, I-20121 Milan, Italy.,INAF Osservatorio Astron Trieste, Via G Tiepolo 11, I-34143 Trieste, Italy.
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- Feruglio, C. (författare)
- INAF Osservatorio Astron Trieste, Via G Tiepolo 11, I-34143 Trieste, Italy.
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- Neri, R. (författare)
- Inst Radioastron Millimetr, F-38406 St Martin Dheres, France.
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- D'Odorico, V. (författare)
- Scuola Normale Super Pisa, Piazza Cavalieri 7, I-56126 Pisa, Italy.;INAF Osservatorio Astron Trieste, Via G Tiepolo 11, I-34143 Trieste, Italy.
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- Wang, R. (författare)
- Peking Univ, Kavli Inst Astron & Astrophys, 5 Yiheyuan Rd, Beijing 100871, Peoples R China.
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- Li, J. (författare)
- Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China.
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Scuola Normale Super Pisa, Piazza Cavalieri 7, I-56126 Pisa, Italy Nordiska institutet för teoretisk fysik (Nordita) (creator_code:org_t)
- 2019-09-13
- 2019
- Engelska.
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Ingår i: Monthly notices of the Royal Astronomical Society. - : OXFORD UNIV PRESS. - 0035-8711 .- 1365-2966. ; 489:3, s. 3939-3952
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https://scholarlypub...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of eight highly excited CO (J(up) > 8) lines and continuum emission in two z similar to 6 quasars: SDSS J231038.88+185519.7 (hereafter J2310), for which CO(8-7), CO(9-8), and CO(17-16) lines have been observed, and ULAS J131911.29+095951.4 (J1319), observed in the CO(14-13), CO(17-16), and CO(19-18) lines. The continuum emission of both quasars arises from a compact region (<0.9 kpc). By assuming a modified blackbody law, we estimate dust masses of log(M-dust/M-circle dot) = 8.75 +/- 0.07 and log(M-dust/M-circle dot) = 8.8 +/- 0.2 and dust temperatures of T-dust = 76 +/- 3 K and T-dust = 66(-10)(+15) K, respectively, for J2310 and J1319. Only CO(8-7) and CO(9-8) in J2310 are detected, while 3 sigma upper limits on luminosities are reported for the other lines of both quasars. The CO line luminosities and upper limits measured in J2310 and J1319 are consistent with those observed in local active galactic nuclei and starburst galaxies, and other z similar to 6 quasars, except for SDSS J1148+5251 (J1148), the only quasar at z = 6.4 with a previous CO(17-16) line detection. By computing the CO spectral line energy distributions normalized to the CO(6-5) line and far-infrared luminosities for J2310, J1319, and J1148, we conclude that different gas heating mechanisms (X-ray radiation and/or shocks) may explain the different CO luminosities observed in these z similar to 6 quasar. Future J(up) > 8 CO observations will be crucial to understand the processes responsible for molecular gas excitation in luminous high-z quasars.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- galaxies: active
- galaxies: high-redshift
- galaxies: ISM
- quasars: individual: SDSS J231038.88+185519.7
- quasars: individual: ULAS J131911.29+095951.4
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Carniani, S.
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Gallerani, S.
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Vallini, Livia
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Pallottini, A.
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Tazzari, M.
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Ferrara, A.
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Maiolino, R.
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Cicone, C.
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Feruglio, C.
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Neri, R.
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D'Odorico, V.
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Wang, R.
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Li, J.
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Stockholms universitet