Skip navigation
  • INAF logo
  • Home
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects
  • Explore by
    • Research outputs
    • Researchers
    • Organization units
    • Projects
  • Login:
    • My DSpace
    • Receive email
      updates
    • Edit Account details
  • Italian
  • English

  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/31270
Title: Probing the Full CO Spectral Line Energy Distribution (SLED) in the Nuclear Region of a Quasar-starburst System at z = 6.003
Authors: Li, Jianan
Wang, Ran
Riechers, Dominik
Walter, Fabian
DECARLI, ROBERTO 
Venamans, Bram P.
Neri, Roberto
Shao, Yali
Fan, Xiaohui
Gao, Yu
Carilli, Chris L.
Omont, Alain
Cox, Pierre
Menten, Karl M.
Wagg, Jeff
Bertoldi, Frank
Narayanan, Desika
Issue Date: 2020
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 889
Issue: 2
First Page: 162
Abstract: We report Atacama Large Millimeter/submillimeter Array observations of CO(8-7), (9-8), ${{\rm{H}}}_{2}{\rm{O}}({2}_{\mathrm{0,2}}\mbox{--}{1}_{\mathrm{1,1}})$ , and ${\mathrm{OH}}^{+}({1}_{1}\mbox{--}{0}_{1})$ and NOrthern Extended Millimeter Array observations of CO(5-4), (6-5), (12-11), and (13-12) toward the z = 6.003 quasar SDSS J231038.88+185519.7, aiming to probe the physical conditions of the molecular gas content of this source. We present the best sampled CO spectral line energy distribution (SLED) at z = 6.003, and analyzed it with the radiative transfer code MOLPOP-CEP. Fitting the CO SLED to a one-component model indicates a kinetic temperature T<SUB>kin</SUB> = 228 K, molecular gas density $\mathrm{log}(n({{\rm{H}}}_{2})/{\mathrm{cm}}^{-3}$ ) = 4.75, and CO column density $\mathrm{log}(N(\mathrm{CO})/{\mathrm{cm}}^{-2})=17.5$ ; although, a two-component model better fits the data. In either case, the CO SLED is dominated by a "warm" and "dense" component. Compared to samples of local (Ultra) Luminous Infrared Galaxies, starburst galaxies, and high-redshift submillimeter galaxies, J2310+1855 exhibits higher CO excitation at (J ≥ 8), like other high-redshift quasars. The high CO excitation, together with the enhanced ${L}_{{{\rm{H}}}_{2}{\rm{O}}}/{L}_{\mathrm{IR}}$ , ${L}_{{{\rm{H}}}_{2}{\rm{O}}}/{L}_{\mathrm{CO}}$ , and ${L}_{{\mathrm{OH}}^{+}}/{L}_{{{\rm{H}}}_{2}{\rm{O}}}$ ratios, suggests that besides the UV radiation from young massive stars, other mechanisms such as shocks, cosmic-rays, and X-rays might also be responsible for the heating and ionization of the molecular gas. In the nuclear region probed by the molecular emissions lines, any of these mechanisms might be present due to the powerful quasar and the starburst activity.
URI: http://hdl.handle.net/20.500.12386/31270
URL: https://iopscience.iop.org/article/10.3847/1538-4357/ab65fa
https://api.elsevier.com/content/abstract/scopus_id/85081410893
ISSN: 0004-637X
DOI: 10.3847/1538-4357/ab65fa
Bibcode ADS: 2020ApJ...889..162L
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

Files in This Item:
File Description SizeFormat
1912.12813.pdfpreprint1.43 MBAdobe PDFView/Open
Li_2020_ApJ_889_162.pdf[Administrators only]1.6 MBAdobe PDF
Show full item record

Page view(s)

10
checked on May 21, 2022

Download(s)

10
checked on May 21, 2022

Google ScholarTM

Check

Altmetric

Altmetric


Items in DSpace are published in Open Access, unless otherwise indicated.


Explore by
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects

Informazioni e guide per autori

https://openaccess-info.inaf.it: tutte le informazioni sull'accesso aperto in INAF

Come si inserisce un prodotto: le guide a OA@INAF

La Policy INAF sull'accesso aperto

Documenti e modelli scaricabili

Feedback
Built with DSpace-CRIS - Extension maintained and optimized by Logo 4SCIENCE