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/20.500.12386/23116
Title: From Blue Star-forming to Red Passive: Galaxies in Transition in Different Environments
Authors: Vulcani, Benedetta 
POGGIANTI, Bianca Maria 
Fritz, Jacopo
FASANO, Giovanni
MORETTI, ALESSIA 
Calvi, Rosa
Paccagnella, Angela
Issue Date: 2015
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 798
Issue: 1
First Page: 52
Abstract: Exploiting a mass-complete (M <SUB>*</SUB> > 10<SUP>10.25</SUP> M <SUB>☉</SUB>) sample at 0.03 <z < 0.11 drawn from the Padova Millennium Galaxy Group Catalog, we use the (U - B)<SUB> rf </SUB> color and morphologies to characterize galaxies, in particular those that show signs of an ongoing or recent transformation of their star-formation activity and/or morphology: green galaxies, red passive late types, and blue star-forming early types. Color fractions depend on mass and only for M <SUB>*</SUB> < 10<SUP>10.7</SUP> M <SUB>☉</SUB> on environment. The incidence of red galaxies increases with increasing mass, and, for M <SUB>*</SUB> < 10<SUP>10.7</SUP> M <SUB>☉</SUB>, decreases toward the group outskirts and in binary and single galaxies. The relative abundance of green and blue galaxies is independent of environment and increases monotonically with galaxy mass. We also inspect galaxy structural parameters, star-formation properties, histories, and ages and propose an evolutionary scenario for the different subpopulations. Color transformations are due to a reduction and suppression of the star-formation rate in both bulges and disks that does not noticeably affect galaxy structure. Morphological transitions are linked to an enhanced bulge-to-disk ratio that is due to the removal of the disk, not to an increase of the bulge. Our modeling suggests that green colors might be due to star-formation histories declining with long timescales, as an alternative scenario to the classical "quenching" processes. Our results suggest that galaxy transformations in star-formation activity and morphology depend neither on the environment nor on being a satellite or the most massive galaxy of a halo. The only environmental dependence we find is the higher fast quenching efficiency in groups giving origin to poststarburst signatures.
Acknowledgments: We thank the anonymous referee whose comments helped to improve the readability of the paper. This work was supported by the World Premier International Research Center Initiative (WPI), MEXT, Japan. It was also supported by the Kakenhi Grant-in-Aid for Young Scientists (B)(26870140) from the Japan Society for the Promotion of Science (JSPS). We thank Joe Liske, Simon Driver, and the whole MGC team for making their valuable data set public and easily accessible.
URI: http://hdl.handle.net/20.500.12386/23116
URL: https://iopscience.iop.org/article/10.1088/0004-637X/798/1/52
ISSN: 0004-637X
DOI: 10.1088/0004-637X/798/1/52
Bibcode ADS: 2015ApJ...798...52V
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

Files in This Item:
File Description SizeFormat 
Vulcani_2015_ApJ_798_52.pdf4.67 MBAdobe PDFView/Open
Show full item record

Page view(s)

18
checked on Jan 21, 2021

Download(s)

4
checked on Jan 21, 2021

Google ScholarTM

Check

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