Constraints on the evolutionary mechanisms of massive galaxies since z ~ 1 from their velocity dispersions

  title={Constraints on the evolutionary mechanisms of massive galaxies since z ~ 1 from their velocity dispersions},
  author={Luis Peralta de Arriba and Marc Balcells and Ignacio Trujillo and Jes'us Falc'on-Barroso and Trinidad Tapia and Nicol{\'a}s Cardiel and Jorge Gallego and Rafael Guzm'an and Angela Hempel and Ignacio Mart'in-Navarro and Pablo G. P'erez-Gonz'alez and P. S'anchez-Bl'aquez},
  journal={Monthly Notices of the Royal Astronomical Society},
Several authors have reported that the dynamical masses of massive compact galaxies (M_⋆ ≳ 10^11 M_⊙, r_e ∼ 1 kpc), computed as M_dyn=5.0 σ_e^2r_e/GMdyn=5.0 σe2re/G, are lower than their stellar masses M_⋆. In a previous study from our group, the discrepancy is interpreted as a breakdown of the assumption of homology that underlie the M_dyn determinations. Here, we present new spectroscopy of six redshift z ≈ 1.0 massive compact ellipticals from the Extended Groth Strip, obtained with the 10.4… Expand

Figures and Tables from this paper

Dark matter inside early-type galaxies as function of mass and redshift
We study the behaviour of the dynamical and stellar mass inside the effective radius (re) of early-type galaxies (ETGs). We use several samples of ETGs -ranging from 19 000 to 98 000 objects- fromExpand
Dynamical masses and non-homology of massive elliptical galaxies grown by dry mergers
We study whether dry merger-driven size growth of massive elliptical galaxies depends on their initial structural concentration, and analyse the validity of the homology hypothesis for virial massExpand
Massive relic galaxies prefer dense environments
We study the preferred environments of $z \sim 0$ massive relic galaxies ($M_\star \gtrsim 10^{10}~\mathrm{M_\odot}$ galaxies with little or no growth from star formation or mergers since $z \simExpand
Stellar populations of galaxies in the ALHAMBRA survey up to $z \sim 1$. IV. Properties of quiescent galaxies on the stellar mass$-$size plane
We perform a comprehensive study of the stellar population properties of quiescent galaxies as a function of size and stellar mass to constrain the physical mechanism governing the stellar massExpand
Observations contradict galaxy size and surface brightness predictions that are based on the expanding universe hypothesis
In a non-expanding universe surface brightness is independent of distance or redshift, while in an expanding universe it decreases rapidly with both. Similarly, for objects of the same luminosity,Expand


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 Reff=0.5-2.4 kpcExpand
A high stellar velocity dispersion for a compact massive galaxy at redshift z = 2.186
The velocity dispersion is very high at  km s-1, consistent with the mass and compactness of the galaxy inferred from photometric data, which would indicate significant recent structural and dynamical evolution of massive galaxies over the past 10 Gyr. Expand
Extremely compact massive galaxies at z ~ 1.4
The optical rest-frame sizes of 10 of the most massive (∼5 × 10 11 h −2 M� ) galaxies found in the near-infrared MUNICS survey at 1.2 < z < 1.7 are analysed. Sizes are estimated in both the J andExpand
The Kormendy relation of massive elliptical galaxies at z ~ 1.5: evidence for size evolution
We present the morphological analysis based on HST-NIC2 (0.075 arcsec pixel -1 ) images in the F160W filter of a sample of nine massive field (>10 11 M ⊙ ) galaxies spectroscopically classified asExpand
Strong size evolution of the most massive galaxies since z~2
Using the combined capabilities of the large near-infrared Palomar/DEEP-2 survey, and the superb resolution of the Advanced Camera for Surveys HST camera, we explore the size evolution of 831 veryExpand
Size Evolution of the Most Massive Galaxies at 1.7 < z < 3 from GOODS NICMOS Survey Imaging
We measure the sizes of 82 massive (M ≥ 1011 M☉) galaxies at 1.7 ≤ z ≤ 3 utilizing deep HST NICMOS data taken in the GOODS North and South fields. Our sample is almost an order of magnitude largerExpand
The mass assembly history of field galaxies: detection of an evolving mass limit for star forming galaxies
We characterize the mass-dependent evolution of more than 8000 galaxies using spectroscopic redshifts from the DEEP2 Galaxy Redshift Survey in the range 0.4 < z < 1.4 and stellar masses calculatedExpand
Constraints on the merging channel of massive galaxies since z∼1
We probe the merging channel of massive galaxies over the z= 0.3 − 1.3 redshift window by studying close pairs in a sample of 238 galaxies with stellar mass >∼ 1011M⊙, from the SHARDS survey. SHARDSExpand
Velocity Dispersions and Dynamical Masses for a Large Sample of Quiescent Galaxies at z > 1: Improved Measures of the Growth in Mass and Size
We present Keck LRIS spectroscopy for a sample of 103 massive (M > 10^(10.6) M☉) galaxies with redshifts 0.9 < z < 1.6. Of these, 56 are quiescent with high signal-to-noise absorption line spectra,Expand
Keck-I MOSFIRE Spectroscopy of Compact Star- Forming Galaxies at z≳ 2: High Velocity Dispersions in Progenitors of Compact Quiescent Galaxies
We present Keck-I MOSFIRE near-infrared spectroscopy for a sample of 13 compact star-forming galaxies (SFGs) at redshift 2 ≤ z ≤ 2.5 with star formation rates of SFR ~ 100 M_☉ yr^(–1) and masses ofExpand