Bibcode
Gadotti, D. A.; Seidel, M. K.; Sánchez-Blázquez, Patricia; Falcón-Barroso, J.; Husemann, Bernd; Coelho, Paula; Pérez, Isabel
Referencia bibliográfica
Astronomy and Astrophysics, Volume 584, id.A90, 19 pp.
Fecha de publicación:
12
2015
Revista
Número de citas
58
Número de citas referidas
52
Descripción
We use data from the Multi-Unit Spectroscopic Explorer (MUSE), recently
commissioned at the Very Large Telescope (VLT), to study the kinematics
and stellar population content of NGC 4371, an early-type massive barred
galaxy in the core of the Virgo cluster. We integrate this study with a
detailed structural analysis using imaging data from the Hubble and
Spitzer Space Telescopes, which allows us to perform a thorough
investigation of the physical properties of the galaxy. We show that the
rotationally supported inner components in NGC 4371, i.e. an inner disc
and a nuclear ring - which, according to the predominant scenario, are
built with stars formed from gas brought to the inner region by the bar
- are vastly dominated by stars older than 10 Gyr. Our results thus
indicate that the formation of the bar occurred at a redshift of about
z=1.8+0.5-0.4 (error bars are derived from 100 Monte
Carlo realisations). NGC 4371 thus testifies to the robustness of bars.
In addition, the mean stellar age of the portion of the major disc of
the galaxy that is covered by our MUSE data is above 7 Gyr with a small
contribution from younger stars. This suggests that the quenching of
star formation in NGC 4371, which is very likely an environmental
effect, was already occurring at a redshift of about
z=0.8+0.2-0.1. Our results suggest that bar-driven
secular evolution processes may have an extended impact on the evolution
of galaxies, and thus on the properties of galaxies as observed today,
and not necessarily be restricted to more recent cosmic epochs.
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