Bibcode
Ardila, F.; Alatalo, Katherine; Lanz, Lauranne; Appleton, Philip N.; Beaton, Rachael L.; Bitsakis, Theodoros; Cales, Sabrina L.; Falcón-Barroso, J.; Kewley, Lisa J.; Medling, Anne M.; Mulchaey, John S.; Nyland, Kristina; Rich, Jeffrey A.; Urry, C. Meg
Referencia bibliográfica
The Astrophysical Journal, Volume 863, Issue 1, article id. 28, 10 pp. (2018).
Fecha de publicación:
8
2018
Revista
Número de citas
10
Número de citas referidas
8
Descripción
The Shocked POststarburst Galaxy Survey (SPOGS) aims to identify
galaxies in the transitional phase between actively star-forming and
quiescence with nebular lines that are excited from shocks rather than
star formation processes. We explored the ultraviolet (UV) properties of
objects with near-ultraviolet (NUV) and far-ultraviolet (FUV) photometry
from archival GALEX data; 444 objects were detected in both bands, 365
in only the NUV, and 24 in only the FUV, for a total of 833 observed
objects. We compared SPOGs to samples of star-forming galaxies (SFs),
quiescent galaxies (Qs), classical E+A post-starburst galaxies, active
galactic nuclei (AGN) host galaxies, and interacting galaxies. We found
that SPOGs have a larger range in their FUV-NUV and NUV-r
colors compared with most of the other samples, although all of our
comparison samples occupied color space inside of the SPOGs region. On
the basis of their UV colors, SPOGs are a heterogeneous group, possibly
made up of a mixture of SFs, Qs, and/or AGN. Using Gaussian mixture
models, we are able to recreate the distribution of FUV-NUV colors
of SPOGs and E + A galaxies with different combinations of SFs, Qs, and
AGN. We find that the UV colors of SPOGs require a >60% contribution
from SFs, with either Qs or AGN representing the remaining contribution,
while UV colors of E + A galaxies required a significantly lower
fraction of SFs, supporting the idea that SPOGs are at an earlier point
in their transition from quiescent to star-forming than E + A galaxies.
Proyectos relacionados
Huellas de la Formación de las Galaxias: Poblaciones estelares, Dinámica y Morfología
Bienvenida a la página web del g rupo de investigación Traces of Galaxy Formation. Somos un grupo de investigación amplio, diverso y muy activo cuyo objetivo principal es entender la formación de galaxias en el Universo de una manera lo más completa posible. Con el estudio detellado de las poblaciones estelares como bandera, estamos constantemente
Ignacio
Martín Navarro