Navigation überspringen
Universitätsbibliothek Heidelberg
Status: Bibliographieeintrag
Standort: ---
Exemplare: ---
heiBIB
 Online-Ressource
Verfasst von:Urich, Linda [VerfasserIn]   i
 Lisker, Thorsten [VerfasserIn]   i
 Janz, Joachim [VerfasserIn]   i
Titel:Young, metal-enriched cores in early-type dwarf galaxies in the Virgo cluster based on colour gradients
Verf.angabe:Linda Urich, Thorsten Lisker, Joachim Janz, Glenn van de Ven, Ryan Leaman, Alessandro Boselli, Sanjaya Paudel, Agnieszka Sybilska, Reynier F. Peletier, Mark den Brok, Gerhard Hensler, Elisa Toloba, Jesús Falcón-Barroso, Sami-Matias Niemi
Ausgabe:Version v2
E-Jahr:2017
Jahr:19 Jul 2017
Umfang:12 S.
Fussnoten:Version 1 vom 5. Juli 2017, Version 2 vom 19. Juli 2017 ; Gesehen am 11.11.2022
Titel Quelle:Enthalten in: De.arxiv.org
Ort Quelle:[S.l.] : Arxiv.org, 1991
Jahr Quelle:2017
Band/Heft Quelle:(2017), Artikel-ID 1707.01228, Seite 1-12
Abstract:Early-type dwarf galaxies are not simply featureless, old objects, but were found to be much more diverse, hosting substructures and a variety of stellar population properties. To explore the stellar content of faint early-type galaxies, and to investigate in particular those with recent central star formation, we study colours and colour gradients within one effective radius in optical (g-r) and near-infrared (i-H) bands for 120 Virgo cluster early types with -19 mag < $M_{r}$ < -16 mag. Twelve galaxies turn out to have blue cores, when defined as g-r colour gradients larger than 0.10 mag/$R_{\rm eff}$, which represents the positive tail of the gradient distribution. For these galaxies, we find that they have the strongest age gradients, and that even outside the blue core, their mean stellar population is younger than the mean of ordinary faint early types. The metallicity gradients of these blue-cored early-type dwarf galaxies are, however, in the range of most normal faint early types, which we find to have non-zero gradients with higher central metallicity. The blue central regions are consistent with star formation activity within the last few 100 Myr. We discuss that these galaxies could be explained by environmental quenching of star formation in the outer galaxy regions, while the inner star formation activity has continued.
DOI:doi:10.48550/arXiv.1707.01228
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

kostenfrei: Volltext: http://arxiv.org/abs/1707.01228
 DOI: https://doi.org/10.48550/arXiv.1707.01228
Datenträger:Online-Ressource
Sprache:eng
Sach-SW:Astrophysics - Astrophysics of Galaxies
K10plus-PPN:1571412859
Verknüpfungen:→ Sammelwerk

Permanenter Link auf diesen Titel (bookmarkfähig):  https://katalog.ub.uni-heidelberg.de/titel/68236255   QR-Code
zum Seitenanfang