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ALMA view of a mass...
ALMA view of a massive spheroid progenitor : a compact rotating core of molecular gas in an AGN host at z=2.226
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- Talia, M. (author)
- Univ Bologna, Dipartimento Fis & Astron, Via Gobetti 93-2, I-40129 Bologna, Italy.;INAF Osservatorio Astron Bologna, Via Gobetti 93-3, I-40129 Bologna, Italy.
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- Pozzi, F. (author)
- Univ Bologna, Dipartimento Fis & Astron, Via Gobetti 93-2, I-40129 Bologna, Italy.;INAF Osservatorio Astron Bologna, Via Gobetti 93-3, I-40129 Bologna, Italy.
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- Vallini, Livia (author)
- Stockholms universitet,Nordiska institutet för teoretisk fysik (Nordita),Stockholm Univ, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden.;Nordita SU
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- Cimatti, A. (author)
- Univ Bologna, Dipartimento Fis & Astron, Via Gobetti 93-2, I-40129 Bologna, Italy.;INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.
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- Cassata, P. (author)
- Univ Valparaiso, Fac Ciencias, Inst Fis & Astron, Gran Bretana 1111, Valparaiso, Chile.
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- Fraternali, F. (author)
- Univ Bologna, Dipartimento Fis & Astron, Via Gobetti 93-2, I-40129 Bologna, Italy.;Univ Groningen, Kapteyn Astron Inst, Postbus 800, NL-9700 AV Groningen, Netherlands.
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- Brusa, M. (author)
- Univ Bologna, Dipartimento Fis & Astron, Via Gobetti 93-2, I-40129 Bologna, Italy.;INAF Osservatorio Astron Bologna, Via Gobetti 93-3, I-40129 Bologna, Italy.
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- Daddi, E. (author)
- Univ Paris Diderot, Univ Paris Saclay, Sorbonne Paris Cite, CEA,IRFU,DAp,AIM,CNRS, F-91191 Gif Sur Yvette, France.
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- Delvecchio, I. (author)
- Univ Zagreb, Fac Sci, Dept Phys, Bijenicka Cesta 32, Zagreb 10000, Croatia.
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- Ibar, E. (author)
- Univ Valparaiso, Fac Ciencias, Inst Fis & Astron, Gran Bretana 1111, Valparaiso, Chile.
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- Liuzzo, E. (author)
- INAF Ist Radioastron Italian ARC, Via Piero Gobetti 101, I-40129 Bologna, Italy.
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- Vignali, C. (author)
- Univ Bologna, Dipartimento Fis & Astron, Via Gobetti 93-2, I-40129 Bologna, Italy.
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- Massardi, M. (author)
- INAF Ist Radioastron Italian ARC, Via Piero Gobetti 101, I-40129 Bologna, Italy.,INAF Osservatorio Astron Bologna, Via Gobetti 93-3, I-40129 Bologna, Italy.
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- Zamorani, G. (author)
- INAF Osservatorio Astron Bologna, Via Gobetti 93-3, I-40129 Bologna, Italy.
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- Gruppioni, C. (author)
- INAF Osservatorio Astron Bologna, Via Gobetti 93-3, I-40129 Bologna, Italy.
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- Renzini, A. (author)
- INAF Osservatorio Astron Padova, Vicolo Osservatorio 2, I-35122 Padua, Italy.
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- Mignoli, M. (author)
- INAF Osservatorio Astron Bologna, Via Gobetti 93-3, I-40129 Bologna, Italy.
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- Pozzetti, L. (author)
- INAF Osservatorio Astron Bologna, Via Gobetti 93-3, I-40129 Bologna, Italy.
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- Rodighiero, G. (author)
- Univ Padua, Dipartimento Fis & Astron G Galilei, Vicolo Osservatorio 3, I-35122 Padua, PD, Italy.
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Univ Bologna, Dipartimento Fis & Astron, Via Gobetti 93-2, I-40129 Bologna, Italy;INAF Osservatorio Astron Bologna, Via Gobetti 93-3, I-40129 Bologna, Italy. Nordiska institutet för teoretisk fysik (Nordita) (creator_code:org_t)
- 2018-02-22
- 2018
- English.
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In: Monthly notices of the Royal Astronomical Society. - : OXFORD UNIV PRESS. - 0035-8711 .- 1365-2966. ; 476:3, s. 3956-3963
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
Close
- We present ALMA observations at 107.291 GHz (band 3) and 214.532 GHz (band 6) of GMASS 0953, a star-forming galaxy at z = 2.226 hosting an obscured active galactic nucleus (AGN) that has been proposed as a progenitor of compact quiescent galaxies (QGs). We measure for the first time the size of the dust and molecular gas emission of GMASS 0953 that we find to be extremely compact (similar to 1 kpc). This result, coupled with a very high interstellar medium (ISM) density (n similar to 10(5.5) cm(-3)), a low gas mass fraction (similar to 0.2), and a short gas depletion time-scale (similar to 150 Myr), implies that GMASS 0953 is experiencing an episode of intense star formation in its central region that will rapidly exhaust its gas reservoirs, likely aided by AGN-induced feedback, confirming its fate as a compact QG. Kinematic analysis of the CO(6-5) line shows evidence of rapidly rotating gas (V-rot = 320(-53)(+92) km s(-1)), as observed also in a handful of similar sources at the same redshift. On-going quenching mechanisms could either destroy the rotation or leave it intact leading the galaxy to evolve into a rotating QG.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- ISM: kinematics and dynamics
- galaxies: active
- galaxies: evolution
- galaxies: high-redshift
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Talia, M.
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Pozzi, F.
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Vallini, Livia
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Cimatti, A.
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Cassata, P.
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Fraternali, F.
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Brusa, M.
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Daddi, E.
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Delvecchio, I.
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Ibar, E.
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Liuzzo, E.
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Vignali, C.
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Massardi, M.
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Zamorani, G.
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Gruppioni, C.
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Renzini, A.
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Mignoli, M.
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Pozzetti, L.
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Rodighiero, G.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
- Articles in the publication
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Monthly notices ...
- By the university
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Royal Institute of Technology
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Stockholm University