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/20.500.12386/29683
Title: Evidence for Reduced Specific Star Formation Rates in the Centers of Massive Galaxies at z = 4
Authors: Jung, Intae
Finkelstein, Steven L.
Song, Mimi
DICKINSON, MARK
Dekel, Avishai
Ferguson, Henry C.
FONTANA, Adriano 
Koekemoer, Anton M.
Lu, Yu
Mobasher, Bahram
Papovich, Casey
Ryan, Russell E., Jr.
Salmon, Brett
Straughn, Amber N.
Issue Date: 2017
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 834
Issue: 1
First Page: 81
Abstract: We perform the first spatially resolved stellar population study of galaxies in the early universe (z = 3.5-6.5), utilizing the Hubble Space Telescope Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey imaging data set over the GOODS-S field. We select a sample of 418 bright and extended galaxies at z = 3.5-6.5 from a parent sample of ∼8000 photometric-redshift-selected galaxies from Finkelstein et al. We first examine galaxies at 3.5 ≲ z ≲ 4.0 using additional deep K-band survey data from the HAWK-I UDS and GOODS Survey which covers the 4000 Å break at these redshifts. We measure the stellar mass, star formation rate, and dust extinction for galaxy inner and outer regions via spatially resolved spectral energy distribution fitting based on a Markov Chain Monte Carlo algorithm. By comparing specific star formation rates (sSFRs) between inner and outer parts of the galaxies we find that the majority of galaxies with high central mass densities show evidence for a preferentially lower sSFR in their centers than in their outer regions, indicative of reduced sSFRs in their central regions. We also study galaxies at z ∼ 5 and 6 (here limited to high spatial resolution in the rest-frame ultraviolet only), finding that they show sSFRs which are generally independent of radial distance from the center of the galaxies. This indicates that stars are formed uniformly at all radii in massive galaxies at z ∼ 5-6, contrary to massive galaxies at z ≲ 4.
URI: http://hdl.handle.net/20.500.12386/29683
URL: https://iopscience.iop.org/article/10.3847/1538-4357/834/1/81
ISSN: 0004-637X
DOI: 10.3847/1538-4357/834/1/81
Bibcode ADS: 2017ApJ...834...81J
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

Files in This Item:
File Description SizeFormat
Jung2017.pdfPdf editoriale2.01 MBAdobe PDFView/Open
Show full item record

Page view(s)

33
checked on Feb 7, 2023

Download(s)

8
checked on Feb 7, 2023

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