2005ApJ...627L..29G


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.15CEST07:23:05

2005ApJ...627L..29G - Astrophys. J., 627, L29-L32 (2005/July-1)

Discovery of an extended ultraviolet disk in the nearby galaxy NGC 4625.

GIL DE PAZ A., MADORE B.F., BOISSIER S., SWATERS R., POPESCU C.C., TUFFS R.J., SHETH K., KENNICUTT R.C.Jr, BIANCHI L., THILKER D. and MARTIN D.C.

Abstract (from CDS):

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 103-104 M, with their Hα emission (when present) being dominated by ionization from single stars.

Abstract Copyright:

Journal keyword(s): Galaxies: Formation - Galaxies: Individual: NGC Number: NGC 4625 - Galaxies: Star Clusters - Ultraviolet: Galaxies

Simbad objects: 6

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Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NGC 2841 LIN 09 22 02.655 +50 58 35.32 10.43 10.09 9.22     ~ 1007 1
2 NGC 4618 GiP 12 41 32.8926165605 +41 09 03.051998352 11.03 11.22 10.78     ~ 299 2
3 NGC 4625 GiP 12 41 52.701 +41 16 25.39 12.74 12.92 12.35     ~ 319 2
4 NGC 4625A G 12 42 11.1 +41 15 10   18.6       ~ 6 1
5 M 63 LIN 13 15 49.2738527699 +42 01 45.726078017   9.34 8.59 8.35   ~ 1097 2
6 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2297 2

    Equat.    Gal    SGal    Ecl

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2021.04.15-07:23:05

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