MOSFIRE Absorption Line Spectroscopy of z > 2 Quiescent Galaxies: Probing a Period of Rapid Size Growth

Abstract

Using the MOSFIRE near-infrared multi-slit spectrograph on the Keck 1 Telescope, we have secured high signal-to-noise ratio absorption line spectra for six massive galaxies with redshift 2 < z < 2.5. Five of these galaxies lie on the red sequence and show signatures of passive stellar populations in their rest-frame optical spectra. By fitting broadened spectral templates we have determined stellar velocity dispersions and, with broad-band HST and Spitzer photometry and imaging, stellar masses and effective radii. Using this enlarged sample of galaxies we confirm earlier suggestions that quiescent galaxies at z > 2 have small sizes and large velocity dispersions compared to local galaxies of similar stellar mass. The dynamical masses are in very good agreement with stellar masses (log Mstar/Mdyn = -0.02 +/- 0.03), although the average stellar-to-dynamical mass ratio is larger than that found at lower redshift (-0.23 +/- 0.05). By assuming evolution at fixed velocity dispersion, not only do we confirm a surprisingly rapid rate of size growth but we also consider the necessary evolutionary track on the mass-size plane and find a slope alpha = dlogR / dlogM > ~2 inconsistent with most numerical simulations of minor mergers. Both results suggest an additional mechanism may be required to explain the size growth of early galaxies.

arXiv commentUpdated to match the published version

References in corpus (41)

• Stellar population synthesis at the resolution of 2003
• Galactic Stellar and Substellar Initial Mass Function
• The Seventh Data Release of the Sloan Digital Sky Survey
• Detailed Structural Decomposition of Galaxy Images
• Parametric Recovery of Line-of-Sight Velocity Distributions from Absorption-Line Spectra of Galaxies via Penalized Likelihood
• CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey
• CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey - The Hubble Space Telescope Observations, Imaging Data Products and Mosaics
• An ultra-deep near-infrared spectrum of a compact quiescent galaxy at z=2.2
• Minor mergers and the size evolution of elliptical galaxies
• Detection of quiescent galaxies in a bicolor sequence from z=0-2
• Mid-Infrared Selection of Active Galaxies
• Passively Evolving Early-type Galaxies at 1.4<z<2.5 in the Hubble Ultra Deep Field
• UltraVISTA: a new ultra-deep near-infrared survey in COSMOS
• The Growth of Massive Galaxies Since z=2
• The Indo-U.S. Library of Coude Feed Stellar Spectra
• The Relation Between Compact, Quiescent High Redshift Galaxies and Massive Nearby Elliptical Galaxies: Evidence for Hierarchical, Inside-Out Growth
• The size evolution of galaxies since z~3: combining SDSS, GEMS and FIRES
• The NEWFIRM Medium-band Survey: Photometric Catalogs, Redshifts and the Bimodal Color Distribution of Galaxies out to z~3
• Can Minor Merging Account for the Size Growth of Quiescent Galaxies? New Results from the CANDELS Survey
• The Chandra COSMOS Survey, I: Overview and Point Source Catalog
• The cosmological size and velocity dispersion evolution of massive early-type galaxies
• Red Nuggets at z~1.5: Compact passive galaxies and the formation of the Kormendy Relation
• Newly-quenched galaxies as the cause for the apparent evolution in average size of the population
• How do minor mergers promote inside-out growth of ellipticals, transforming the size, density profile and dark matter fraction?
• The Assembly History of Field Spheroidals: Evolution of Mass-to-light Ratios and Signatures of Recent Star Formation
• Dissipation and Extra Light in Galactic Nuclei: IV. Evolution in the Scaling Relations of Spheroids
• Stellar Kinematics of z~2 Galaxies and the Inside-Out Growth of Quiescent Galaxies
• Spectroscopic Identification of Massive Galaxies at z~2.3 with Strongly Suppressed Star Formation
• A high stellar velocity dispersion for a compact massive galaxy at z=2.2
• The Space Density and Colors of Massive Galaxies at 2<z<3: the Predominance of Distant Red Galaxies
• CANDELS Observations of the Structural Properties and Evolution of Galaxies in a Cluster at z=1.62
• IDCS J1426+3508: Discovery of a Massive, IR-Selected Galaxy Cluster at z = 1.75
• First Results from Z-FOURGE: Discovery of a Candidate Cluster at z = 2.2 in COSMOS
• Galaxy evolution in overdense environments at high redshift: passive early-type galaxies in a cluster at redshift 2
• Velocity Dispersions and Dynamical Masses for a Large Sample of Quiescent Galaxies at z > 1: Improved Measures of the Growth in Mass and Size
• Deep Absorption Line Studies of Quiescent Galaxies at z~2: The Dynamical Mass-Size Relation, and First Constraints on the Fundamental plane
• Size and velocity-dispersion evolution of early-type galaxies in a Lambda cold dark matter universe
• Fast evolving size of early-type galaxies at z>2 and the role of dissipationless (dry) merging
• Redshift Evolution of the Galaxy Velocity Dispersion Function
• Evolution of Quiescent and Star-Forming Galaxies Since z~1.5 as a Function of Their Velocity Dispersions
• The imprint of dark matter haloes on the size and velocity dispersion evolution of early-type galaxies

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