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Cited by 444

The DOI matches its Crossref record; 92 of the 92 references it cites were found in a registry or an index.

The ATLAS3D Project – XXX. Star formation histories and stellar population scaling relations of early-type galaxies

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McDermid, Richard M., Alatalo, Katherine, Blitz, Leo, Bournaud, Frédéric, Bureau, Martin, Cappellari, Michele, Crocker, Alison F., Davies, Roger L., Davis, Timothy A., de Zeeuw, P. T., Duc, Pierre-Alain, Emsellem, Eric, Khochfar, Sadegh, Krajnović, Davor, Kuntschner, Harald, Morganti, Raffaella, Naab, Thorsten, Oosterloo, Tom, Sarzi, Marc, Scott, Nicholas, Serra, Paolo, Weijmans, Anne-Marie, Young, Lisa M.·2015·Monthly Notices of the Royal Astronomical Society

Abstract

We present the stellar population content of early-type galaxies from the ATLAS3D survey. Using spectra integrated within apertures covering up to one effective radius, we apply two methods: one based on measuring line-strength indices and applying single stellar population (SSP) models to derive SSP-equivalent values of stellar age, metallicity, and alpha enhancement; and one based on spectral fitting to derive non-parametric star formation histories, mass-weighted average values of age, metallicity, and half-mass formation time-scales. Using homogeneously derived effective radii and dynamically determined galaxy masses, we present the distribution of stellar population parameters on the Mass Plane (MJAM, σe, |$R^{\rm maj}_{\rm e}$|⁠), showing that at fixed mass, compact early-type galaxies are on average older, more metal-rich, and more alpha-enhanced than their larger counterparts. From non-parametric star formation histories, we find that the duration of star formation is systematically more extended in lower mass objects. Assuming that our sample represents most of the stellar content of today's local Universe, approximately 50 per cent of all stars formed within the first 2 Gyr following the big bang. Most of these stars reside today in the most massive galaxies (>1010.5 M⊙), which themselves formed 90 per cent of their stars by z ∼ 2. The lower mass objects, in contrast, have formed barely half their stars in this time interval. Stellar population properties are independent of environment over two orders of magnitude in local density, varying only with galaxy mass. In the highest density regions of our volume (dominated by the Virgo cluster), galaxies are older, alpha-enhanced, and have shorter star formation histories with respect to lower density regions.

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Metadata

Authors
McDermid, R. M., Alatalo, K., Blitz, L., Bournaud, F., Bureau, M., Cappellari, M., Crocker, A. F., Davies, R. L., Davis, T. A., de Zeeuw, P. T., Duc, P.-A., Emsellem, E., Khochfar, S., Krajnović, D., Kuntschner, H., Morganti, R., Naab, T., Oosterloo, T., Sarzi, M., Scott, N., Serra, P., Weijmans, A.-M., & Young, L. M.
Venue
Monthly Notices of the Royal Astronomical Society
Published
2015-03-11
Volume
448
Issue
4
Pages
3484-3513
ISSN
  • 0035-8711 (ISSN-L)
  • 1365-2966
OpenAlex
W2003814700
Cited by
444
References
92
FWCI
29.32
Type
journal article
Language
en
Open access
bronze

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McDermid, R. M., Alatalo, K., Blitz, L., Bournaud, F., Bureau, M., Cappellari, M., Crocker, A. F., Davies, R. L., Davis, T. A., de Zeeuw, P. T., Duc, P.-A., Emsellem, E., Khochfar, S., Krajnović, D., Kuntschner, H., Morganti, R., Naab, T., Oosterloo, T., Sarzi, M., . . . Young, L. M. (2015). The ATLAS3D Project – XXX. Star formation histories and stellar population scaling relations of early-type galaxies. Monthly Notices of the Royal Astronomical Society. https://doi.org/10.1093/mnras/stv105

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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