Velocity dispersions and stellar populations of the most compact and massive early-type galaxies at redshift 1

Jesus Martinez-Manso, Rafael Guzman, Guillermo Barro, Javier Cenarro, Pablo Perez-Gonzalez, Patricia Sanchez-Blazquez, Ignacio Trujillo, Marc Balcells, Nicolas Cardiel, Jesus Gallego, Angela Hempel, Mercedes Prieto

Resultado de la investigación: Article

21 Citas (Scopus)

Resumen

We present Gran-Telescopio-Canarias/OSIRIS optical spectra of four of the most compact and massive early-type galaxies (ETGs) in the Groth Strip Survey at redshift z ∼ 1, with effective radii R e = 0.5-2.4kpc and photometric stellar masses M * = (1.2-4) × 10 11 M ·. We find that these galaxies have velocity dispersions σ = 156-236 km s-1. The spectra are well fitted by single stellar population models with approximately 1Gyr of age and solar metallicity. We find that (1) the dynamical masses of these galaxies are systematically smaller by a factor of ∼6 than the published stellar masses using BRIJK photometry, and (2) when estimating stellar masses as 0.7× M dyn, a combination of passive luminosity fading with mass/size growth due to minor mergers can plausibly evolve our objects to match the properties of the local population of ETGs.

Idioma originalEnglish
Número de artículoL22
PublicaciónAstrophysical Journal Letters
Volumen738
N.º2
DOI
EstadoPublished - 10 sep 2011

Huella dactilar

stellar mass
galaxies
OSIRIS
fading
metallicity
photometry
optical spectrum
strip
estimating
merger
luminosity
radii

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Martinez-Manso, J., Guzman, R., Barro, G., Cenarro, J., Perez-Gonzalez, P., Sanchez-Blazquez, P., ... Prieto, M. (2011). Velocity dispersions and stellar populations of the most compact and massive early-type galaxies at redshift 1. Astrophysical Journal Letters, 738(2), [L22]. https://doi.org/10.1088/2041-8205/738/2/L22
Martinez-Manso, Jesus ; Guzman, Rafael ; Barro, Guillermo ; Cenarro, Javier ; Perez-Gonzalez, Pablo ; Sanchez-Blazquez, Patricia ; Trujillo, Ignacio ; Balcells, Marc ; Cardiel, Nicolas ; Gallego, Jesus ; Hempel, Angela ; Prieto, Mercedes. / Velocity dispersions and stellar populations of the most compact and massive early-type galaxies at redshift 1. En: Astrophysical Journal Letters. 2011 ; Vol. 738, N.º 2.
@article{af049dcc8333407990b727a8e1cca49c,
title = "Velocity dispersions and stellar populations of the most compact and massive early-type galaxies at redshift 1",
abstract = "We present Gran-Telescopio-Canarias/OSIRIS optical spectra of four of the most compact and massive early-type galaxies (ETGs) in the Groth Strip Survey at redshift z ∼ 1, with effective radii R e = 0.5-2.4kpc and photometric stellar masses M * = (1.2-4) × 10 11 M ·. We find that these galaxies have velocity dispersions σ = 156-236 km s-1. The spectra are well fitted by single stellar population models with approximately 1Gyr of age and solar metallicity. We find that (1) the dynamical masses of these galaxies are systematically smaller by a factor of ∼6 than the published stellar masses using BRIJK photometry, and (2) when estimating stellar masses as 0.7× M dyn, a combination of passive luminosity fading with mass/size growth due to minor mergers can plausibly evolve our objects to match the properties of the local population of ETGs.",
keywords = "galaxies: evolution, galaxies: formation, galaxies: kinematics and dynamics, galaxies: structure",
author = "Jesus Martinez-Manso and Rafael Guzman and Guillermo Barro and Javier Cenarro and Pablo Perez-Gonzalez and Patricia Sanchez-Blazquez and Ignacio Trujillo and Marc Balcells and Nicolas Cardiel and Jesus Gallego and Angela Hempel and Mercedes Prieto",
year = "2011",
month = "9",
day = "10",
doi = "10.1088/2041-8205/738/2/L22",
language = "English",
volume = "738",
journal = "Astrophysical Journal Letters",
issn = "2041-8205",
publisher = "IOP Publishing Ltd.",
number = "2",

}

Martinez-Manso, J, Guzman, R, Barro, G, Cenarro, J, Perez-Gonzalez, P, Sanchez-Blazquez, P, Trujillo, I, Balcells, M, Cardiel, N, Gallego, J, Hempel, A & Prieto, M 2011, 'Velocity dispersions and stellar populations of the most compact and massive early-type galaxies at redshift 1', Astrophysical Journal Letters, vol. 738, n.º 2, L22. https://doi.org/10.1088/2041-8205/738/2/L22

Velocity dispersions and stellar populations of the most compact and massive early-type galaxies at redshift 1. / Martinez-Manso, Jesus; Guzman, Rafael; Barro, Guillermo; Cenarro, Javier; Perez-Gonzalez, Pablo; Sanchez-Blazquez, Patricia; Trujillo, Ignacio; Balcells, Marc; Cardiel, Nicolas; Gallego, Jesus; Hempel, Angela; Prieto, Mercedes.

En: Astrophysical Journal Letters, Vol. 738, N.º 2, L22, 10.09.2011.

Resultado de la investigación: Article

TY - JOUR

T1 - Velocity dispersions and stellar populations of the most compact and massive early-type galaxies at redshift 1

AU - Martinez-Manso, Jesus

AU - Guzman, Rafael

AU - Barro, Guillermo

AU - Cenarro, Javier

AU - Perez-Gonzalez, Pablo

AU - Sanchez-Blazquez, Patricia

AU - Trujillo, Ignacio

AU - Balcells, Marc

AU - Cardiel, Nicolas

AU - Gallego, Jesus

AU - Hempel, Angela

AU - Prieto, Mercedes

PY - 2011/9/10

Y1 - 2011/9/10

N2 - We present Gran-Telescopio-Canarias/OSIRIS optical spectra of four of the most compact and massive early-type galaxies (ETGs) in the Groth Strip Survey at redshift z ∼ 1, with effective radii R e = 0.5-2.4kpc and photometric stellar masses M * = (1.2-4) × 10 11 M ·. We find that these galaxies have velocity dispersions σ = 156-236 km s-1. The spectra are well fitted by single stellar population models with approximately 1Gyr of age and solar metallicity. We find that (1) the dynamical masses of these galaxies are systematically smaller by a factor of ∼6 than the published stellar masses using BRIJK photometry, and (2) when estimating stellar masses as 0.7× M dyn, a combination of passive luminosity fading with mass/size growth due to minor mergers can plausibly evolve our objects to match the properties of the local population of ETGs.

AB - We present Gran-Telescopio-Canarias/OSIRIS optical spectra of four of the most compact and massive early-type galaxies (ETGs) in the Groth Strip Survey at redshift z ∼ 1, with effective radii R e = 0.5-2.4kpc and photometric stellar masses M * = (1.2-4) × 10 11 M ·. We find that these galaxies have velocity dispersions σ = 156-236 km s-1. The spectra are well fitted by single stellar population models with approximately 1Gyr of age and solar metallicity. We find that (1) the dynamical masses of these galaxies are systematically smaller by a factor of ∼6 than the published stellar masses using BRIJK photometry, and (2) when estimating stellar masses as 0.7× M dyn, a combination of passive luminosity fading with mass/size growth due to minor mergers can plausibly evolve our objects to match the properties of the local population of ETGs.

KW - galaxies: evolution

KW - galaxies: formation

KW - galaxies: kinematics and dynamics

KW - galaxies: structure

UR - http://www.scopus.com/inward/record.url?scp=80052305107&partnerID=8YFLogxK

U2 - 10.1088/2041-8205/738/2/L22

DO - 10.1088/2041-8205/738/2/L22

M3 - Article

AN - SCOPUS:80052305107

VL - 738

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

SN - 2041-8205

IS - 2

M1 - L22

ER -

Martinez-Manso J, Guzman R, Barro G, Cenarro J, Perez-Gonzalez P, Sanchez-Blazquez P y otros. Velocity dispersions and stellar populations of the most compact and massive early-type galaxies at redshift 1. Astrophysical Journal Letters. 2011 sep 10;738(2). L22. https://doi.org/10.1088/2041-8205/738/2/L22