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

J. Martínez-Manso; R. Guzmán; G. Barro; A. J. Cenarro; P. G. Pérez-González; P. Sánchez-Blázquez; I. Trujillo; M. Balcells; N. Cardiel; J. Gallego; A. Hempel; M. Prieto

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

J. Martínez-Manso, R. Guzmán, G. Barro, A. J. Cenarro, P. G. Pérez-González, P. Sánchez-Blázquez, I. Trujillo, M. Balcells, N. Cardiel, J. Gallego, A. Hempel, M. Prieto

Exact Sciences School

Research output: Contribution to journal › Conference article › peer-review

Abstract

We present Gran-Telescopio-Canarias/OSIRIS optical spectra of 4 of the most compact and massive early-type galaxies in the Groth Strip Survey at redshift z ∼ 1, with effective radii R_e = 0.5 - 2.4 kpc and photometric stellar masses M_* = 1.2 - 4 × 10¹¹ M _⊙. We find these galaxies have velocity dispersions σ = 156 - 236 km s^-1. The spectra are well fitted by single stellar population models with approximately 1 Gyr of age and solar metallicity. We find that: (i) the dynamical masses of these galaxies are systematically smaller by a factor of ∼6 than the published stellar masses; (ii) 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 early-type galaxies.

Original language	English
Pages (from-to)	26-27
Number of pages	2
Journal	Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias
Volume	42
Publication status	Published - 3 Jun 2013
Event	4th Meeting on Science with the Gran Telescopio Canarias - Santa Cruz de La Palma, Spain Duration: 16 Nov 2011 → 18 Nov 2011

Keywords

Galaxies: Evolution
Galaxies: Formation
Galaxies: Kinematics and dynamics
Galaxies: Structure

ASJC Scopus subject areas

Space and Planetary Science
Astronomy and Astrophysics

Cite this

Martínez-Manso, J., Guzmán, R., Barro, G., Cenarro, A. J., Pérez-González, P. G., Sánchez-Blázquez, P., Trujillo, I., Balcells, M., Cardiel, N., Gallego, J., Hempel, A., & Prieto, M. (2013). Velocity dispersions and stellar populations of the most compact and massive early-type galaxies at redshift ∼1. Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias, 42, 26-27.

@article{bb30cd90c1e84f23a9059476316cbd60,

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 4 of the most compact and massive early-type galaxies in the Groth Strip Survey at redshift z ∼ 1, with effective radii Re = 0.5 - 2.4 kpc and photometric stellar masses M* = 1.2 - 4 × 1011 M ⊙. We find these galaxies have velocity dispersions σ = 156 - 236 km s-1. The spectra are well fitted by single stellar population models with approximately 1 Gyr of age and solar metallicity. We find that: (i) the dynamical masses of these galaxies are systematically smaller by a factor of ∼6 than the published stellar masses; (ii) when estimating stellar masses as 0.7 × Mdyn, 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 early-type galaxies.",

keywords = "Galaxies: Evolution, Galaxies: Formation, Galaxies: Kinematics and dynamics, Galaxies: Structure",

author = "J. Mart{\'i}nez-Manso and R. Guzm{\'a}n and G. Barro and Cenarro, {A. J.} and P{\'e}rez-Gonz{\'a}lez, {P. G.} and P. S{\'a}nchez-Bl{\'a}zquez and I. Trujillo and M. Balcells and N. Cardiel and J. Gallego and A. Hempel and M. Prieto",

year = "2013",

month = jun,

day = "3",

language = "English",

volume = "42",

pages = "26--27",

journal = "Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias",

issn = "1405-2059",

note = "4th Meeting on Science with the Gran Telescopio Canarias ; Conference date: 16-11-2011 Through 18-11-2011",

}

Martínez-Manso, J, Guzmán, R, Barro, G, Cenarro, AJ, Pérez-González, PG, Sánchez-Blázquez, P, Trujillo, I, Balcells, M, Cardiel, N, Gallego, J, Hempel, A & Prieto, M 2013, 'Velocity dispersions and stellar populations of the most compact and massive early-type galaxies at redshift ∼1', Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias, vol. 42, pp. 26-27.

TY - JOUR

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

AU - Martínez-Manso, J.

AU - Guzmán, R.

AU - Barro, G.

AU - Cenarro, A. J.

AU - Pérez-González, P. G.

AU - Sánchez-Blázquez, P.

AU - Trujillo, I.

AU - Balcells, M.

AU - Cardiel, N.

AU - Gallego, J.

AU - Hempel, A.

AU - Prieto, M.

PY - 2013/6/3

Y1 - 2013/6/3

N2 - We present Gran-Telescopio-Canarias/OSIRIS optical spectra of 4 of the most compact and massive early-type galaxies in the Groth Strip Survey at redshift z ∼ 1, with effective radii Re = 0.5 - 2.4 kpc and photometric stellar masses M* = 1.2 - 4 × 1011 M ⊙. We find these galaxies have velocity dispersions σ = 156 - 236 km s-1. The spectra are well fitted by single stellar population models with approximately 1 Gyr of age and solar metallicity. We find that: (i) the dynamical masses of these galaxies are systematically smaller by a factor of ∼6 than the published stellar masses; (ii) when estimating stellar masses as 0.7 × Mdyn, 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 early-type galaxies.

AB - We present Gran-Telescopio-Canarias/OSIRIS optical spectra of 4 of the most compact and massive early-type galaxies in the Groth Strip Survey at redshift z ∼ 1, with effective radii Re = 0.5 - 2.4 kpc and photometric stellar masses M* = 1.2 - 4 × 1011 M ⊙. We find these galaxies have velocity dispersions σ = 156 - 236 km s-1. The spectra are well fitted by single stellar population models with approximately 1 Gyr of age and solar metallicity. We find that: (i) the dynamical masses of these galaxies are systematically smaller by a factor of ∼6 than the published stellar masses; (ii) when estimating stellar masses as 0.7 × Mdyn, 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 early-type galaxies.

KW - Galaxies: Evolution

KW - Galaxies: Formation

KW - Galaxies: Kinematics and dynamics

KW - Galaxies: Structure

UR - http://www.scopus.com/inward/record.url?scp=84878305370&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:84878305370

SN - 1405-2059

VL - 42

SP - 26

EP - 27

JO - Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias

JF - Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias

T2 - 4th Meeting on Science with the Gran Telescopio Canarias

Y2 - 16 November 2011 through 18 November 2011

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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