Bibcode
Toloba, E.; Guhathakurta, P.; Boselli, A.; Peletier, R. F.; Emsellem, E.; Lisker, T.; van de Ven, G.; Simon, J. D.; Falcón-Barroso, J.; Adams, J. J.; Benson, A. J.; Boissier, S.; den Brok, M.; Gorgas, J.; Hensler, G.; Janz, J.; Laurikainen, E.; Paudel, S.; Ryś, A.; Salo, H.
Referencia bibliográfica
The Astrophysical Journal, Volume 799, Issue 2, article id. 172, 12 pp. (2015).
Fecha de publicación:
2
2015
Revista
Número de citas
58
Número de citas referidas
55
Descripción
We analyze the stellar kinematics of 39 dwarf early-type galaxies (dEs)
in the Virgo Cluster. Based on the specific stellar angular momentum
λRe and the ellipticity, we find 11 slow rotators and
28 fast rotators. The fast rotators in the outer parts of the Virgo
Cluster rotate significantly faster than fast rotators in the inner
parts of the cluster. Moreover, 10 out of the 11 slow rotators are
located in the inner 3° (D < 1 Mpc) of the cluster. The fast
rotators contain subtle disk-like structures that are visible in
high-pass filtered optical images, while the slow rotators do not
exhibit these structures. In addition, two of the dEs have kinematically
decoupled cores and four more have emission partially filling in the
Balmer absorption lines. These properties suggest that Virgo Cluster dEs
may have originated from late-type star-forming galaxies that were
transformed by the environment after their infall into the cluster. The
correlation between λRe and the clustercentric
distance can be explained by a scenario where low luminosity
star-forming galaxies fall into the cluster, their gas is rapidly
removed by ram-pressure stripping, although some of it can be retained
in their core, their star formation is quenched but their stellar
kinematics are preserved. After a long time in the cluster and several
passes through its center, the galaxies are heated up and transformed
into slow rotating dEs.
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