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| DOI | 10.1051/0004-6361/201526677 | ||||
| Año | 2015 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
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(-0.4)(+0.5) (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(-0.1)(+0.2). 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.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Gadotti, Dimitri | Hombre |
ESO - Chile
European Southern Observatory Santiago - Chile Observatorio Europeo Austral - Alemania Observatorio Europeo Austral - Chile |
| 2 | Seidel, Marja K. | Mujer |
Inst Astrofis Canarias - España
UNIV LA LAGUNA - España Instituto Astrofisico de Canarias - España Universidad de La Laguna - España |
| 3 | SANCHEZ-BLAZQUEZ, PATRICIA | Mujer |
UNIV AUTONOMA MADRID - España
Universidad Autónoma de Madrid - España |
| 4 | Falcon-Barroso, Jesus | Hombre |
Inst Astrofis Canarias - España
UNIV LA LAGUNA - España Instituto Astrofisico de Canarias - España Universidad de La Laguna - España |
| 5 | Husemann, Bernd | Hombre |
ESO - Alemania
Observatorio Europeo Austral - Alemania |
| 6 | Coelho, P. | Mujer |
UNIV SAO PAULO - Brasil
Universidade de Sao Paulo - USP - Brasil Universidade de São Paulo - Brasil |
| 7 | PEREZ-MARTIN, ISABEL | Mujer |
UNIV GRANADA - España
Universidad de Granada, Facultad de Ciencias - España Universidad de Granada - España |
| Fuente |
|---|
| Ministerio de Economía y Competitividad |
| Spanish Ministry of Economy and Competitiveness |
| Seventh Framework Programme |
| Ministerio de EconomÃa y Competitividad |
| Spanish Ministry of Economy and Competitiveness (MINECO) |
| La Silla Paranal Observatory |
| FP7 People: Marie-Curie Actions |
| Research Executive Agency |
| Marie Curie |
| Ramon y Cajal |
| Ramon y Cajal programme |
| DAGAL network from the People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme |
| Agradecimiento |
|---|
| This work would have been impossible without the vigorous work of Fernando Selman and George Hau, MUSE Paranal instrument scientists. We are grateful to Francesca Iannuzzi and Francesca Fragkoudi for very useful input and discussions on bars in simulated galaxies, particularly on box/peanuts. It is also a pleasure to thank Eric Emsellem for useful discussions on the inner components of barred galaxies and Michael Vlasov for his permission to use a chart from his atlas. We are very grateful to the anonymous referee for a thoughtful and constructive report. M.K.S. and J.F.-B. acknowledge support from grant AYA2013-48226-C3-1-P from the Spanish Ministry of Economy and Competitiveness (MINECO). J.F.-B. also acknowledges support from the DAGAL network from the People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme FP7/2007-2013/ under REA grant agreement number PITN-GA-2011-289313. P.S.-B. acknowledges support from the Ramon y Cajal programme, grant ATA2010-21322-C03-02 from the Spanish Ministry of Economy and Competitiveness (MINECO). Based on observations made with ESO telescopes at the La Silla Paranal Observatory under programme ID 060,A-9313. |
| This work would have been impossible without the vigorous work of Fernando Selman and George Hau, MUSE Paranal instrument scientists. We are grateful to Francesca Iannuzzi and Francesca Fragkoudi for very useful input and discussions on bars in simulated galaxies, particularly on box/peanuts. It is also a pleasure to thank Eric Emsellem for useful discussions on the inner components of barred galaxies and Michael Vlasov for his permission to use a chart from his atlas. We are very grateful to the anonymous referee for a thoughtful and constructive report. M.K.S. and J.F.-B. acknowledge support from grant AYA2013-48226-C3-1-P from the Spanish Ministry of Economy and Competitiveness (MINECO). J.F.-B. also acknowledges support from the DAGAL network from the People Programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme FP7/2007–2013/ under REA grant agreement number PITN-GA-2011-289313. P.S.-B. acknowledges support from the Ramón y Cajal programme, grant ATA2010-21322-C03-02 from the Spanish Ministry of Economy and Competitiveness (MINECO). Based on observations made with ESO telescopes at the La Silla Paranal Observatory under programme ID 060.A-9313. |