English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Discovery of an Extended Ultraviolet Disk in the Nearby Galaxy NGC 4625

MPS-Authors
/persons/resource/persons30905

Popescu,  Cristina C.
Prof. Heinrich J. Völk, Emeriti, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons31117

Tuffs,  Richard
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

Locator
There are no locators available
Fulltext (public)
There are no public fulltexts available
Supplementary Material (public)
There is no public supplementary material available
Citation

Gil de Paz, A., Madore, B., Boissier, S., Swaters, R., Popescu, C. C., Tuffs, R., et al. (2005). Discovery of an Extended Ultraviolet Disk in the Nearby Galaxy NGC 4625. The Astrophysical Journal, 627(1, Part 2), L29-L32.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-88AA-F
Abstract
Recent far-UV (FUV) and near-UV (NUV) observations of the nearby galaxy NGC 4625 made by the Galaxy Evolution Explorer (GALEX) show the presence of an extended UV disk reaching to 4 times the optical radius of the galaxy. The UV-to-optical colors suggest that the bulk of the stars in the disk of NGC 4625 are currently being formed, providing a unique opportunity to study today the physics of star formation under conditions similar to those when the normal disks of spiral galaxies like the Milky Way first formed. In the case of NGC 4625, the star formation in the extended disk is likely to be triggered by interaction with NGC 4618 and possibly also with the newly discovered galaxy NGC 4625A. The positions of the FUV complexes in the extended disk coincide with peaks in the H I distribution. The masses of these complexes are in the range 103104 M, with their H emission (when present) being dominated by ionization from single stars.