2024-03-28T08:10:48Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1477942020-05-18T11:25:36Zcom_10261_97com_10261_4col_10261_350
2017-04-03T10:48:03Z
urn:hdl:10261/147794
IMF shape constraints from stellar populations and dynamics from CALIFA
Lyubenova, M.
García-Benito, Rubén
González Delgado, Rosa M.
CALIFA Collaboration
European Commission
Ministerio de Economía y Competitividad (España)
European Research Council
Ministerio de Ciencia e Innovación (España)
Galaxies: elliptical and lenticular, CD
Galaxies: stellar content
Galaxies: kinematics and dynamics
M. Lyubenova et. al.
In this paper, we describe how we use stellar dynamics information to constrain the shape of the stellar initial mass function (IMF) in a sample of 27 early-type galaxies from the CALIFA survey. We obtain dynamical and stellar mass-to-light ratios, ¿<SUB>dyn</SUB> and ¿<SUB>*</SUB>, over a homogenous aperture of 0.5 R<SUB>e</SUB>. We use the constraint ¿<SUB>dyn</SUB>¿¿<SUB>*</SUB> to test two IMF shapes within the framework of the extended MILES stellar population models. We rule out a single power-law IMF shape for 75 per cent of the galaxies in our sample. Conversely, we find that a double power-law IMF shape with a varying high-mass end slope is compatible (within 1¿) with 95 per cent of the galaxies. We also show that dynamical and stellar IMF mismatch factors give consistent results for the systematic variation of the IMF in these galaxies. © 2016, Published by Oxford University Press on behalf of the Royal Astronomical Society.
2017-04-03T10:48:03Z
2017-04-03T10:48:03Z
2016
2017-04-03T10:48:03Z
artículo
Monthly Notices of the Royal Astronomical Society 463(3): 3220- 3225 (2016)
http://hdl.handle.net/10261/147794
10.1093/mnras/stw2434
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100000781
http://dx.doi.org/10.13039/501100004837
eng
Publisher's version
http://dx.doi.org/10.1093/mnras/stw2434
Sí
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2013-48226-C3-1-P
info:eu-repo/grantAgreement/EC/FP7/289313
info:eu-repo/grantAgreement/EC/FP7/303912
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2014-57490-P
openAccess
Oxford University Press