Dusty galaxies in the Epoch of Reionization: simulations. Issue 1 (22nd March 2018)
- Record Type:
- Journal Article
- Title:
- Dusty galaxies in the Epoch of Reionization: simulations. Issue 1 (22nd March 2018)
- Main Title:
- Dusty galaxies in the Epoch of Reionization: simulations
- Authors:
- Behrens, C
Pallottini, A
Ferrara, A
Gallerani, S
Vallini, L - Abstract:
- Abstract: The recent discovery of dusty galaxies well into the Epoch of Reionization (redshift z > 6) poses challenging questions about the properties of the interstellar medium in these pristine systems. By combining state-of-the-art hydrodynamic and dust radiative transfer simulations, we address these questions focusing on the recently discovered dusty galaxy A2744_YD4 ( z = 8.38, Laporte et al.). We show that we can reproduce the observed spectral energy distribution (SED) only using different physical values with respect to the inferred ones by Laporte et al., i.e. a star formation rate of SFR = 78 $\mathrm{M}_{\odot } \rm yr^{-1}$, a factor ≈4 higher than deduced from simple SED fitting. In this case, we find: (i) dust attenuation (corresponding to τV = 1.4) is consistent with a Milky Way (MW) extinction curve; (ii) the dust-to-metal ratio is low, f d ∼ 0.08, implying that early dust formation is rather inefficient; (iii) the luminosity-weighted dust temperature is high, $T_{\rm d}=91\pm 23\, \rm K$, as a result of the intense (≈100 × MW) interstellar radiation field; and (iv) due to the high T d, the Atacama Large Millimeter/submillimeter Array Band 7 detection can be explained by a limited dust mass, M d = 1.6 × 10 6 M⊙ . Finally, the high dust temperatures might solve the puzzling low infrared excess (IRX) recently deduced for high- z galaxies from the IRX–β relation.
- Is Part Of:
- Monthly notices of the Royal Astronomical Society. Volume 477:Issue 1(2018)
- Journal:
- Monthly notices of the Royal Astronomical Society
- Issue:
- Volume 477:Issue 1(2018)
- Issue Display:
- Volume 477, Issue 1 (2018)
- Year:
- 2018
- Volume:
- 477
- Issue:
- 1
- Issue Sort Value:
- 2018-0477-0001-0000
- Page Start:
- 552
- Page End:
- 565
- Publication Date:
- 2018-03-22
- Subjects:
- methods: numerical -- dust, extinction -- galaxies: evolution -- galaxies: high-redshift -- galaxies: ISM -- infrared: general
Astronomy -- Periodicals
Periodicals
520.5 - Journal URLs:
- http://mnras.oxfordjournals.org/ ↗
http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2966 ↗
http://www.blackwell-synergy.com/issuelist.asp?journal=mnr ↗
http://www.blackwell-synergy.com/loi/mnr ↗
http://ukcatalogue.oup.com/ ↗ - DOI:
- 10.1093/mnras/sty552 ↗
- Languages:
- English
- ISSNs:
- 0035-8711
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 5943.000000
British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 12198.xml