Optical to Near-IR Spectrum of a Massive Evolved Galaxy at z = 1.26

Abstract

We present the optical to near-infrared (IR) spectrum of the galaxy TSPS J1329-0957, a red and bright member of the class of extremely red objects (EROs) at z = 1.26. This galaxy was found in the course of the Tokyo-Stromlo Photometry Survey (TSPS) which we are conducting in the southern sky. The spectroscopic observations were carried out with the Gemini Multi-Object Spectrograph (GMOS) and the Gemini Near Infra-Red Spectrograph (GNIRS) mounted on the Gemini-South telescope. The wide wavelength coverage of 0.6 - 2.3 um provides useful clues as to the nature of EROs while most published spectra are limited to a narrower spectral range which is dictated by the need for efficient redshift determination in a large survey. We compare our spectrum with several optical composite spectra obtained in recent large surveys, and with stellar population synthesis models. The effectiveness of using near-IR broad-band data, instead of the spectral data, in deriving the galaxy properties are also investigated. We find that TSPS J1329-0957 formed when the universe was 2 - 3 Gyr old, and subsequently evolved passively to become one of the most massive galaxies found in the z = 1 - 2 universe. Its early type and estimated stellar mass of M* = 10^{11.5} Msun clearly point to this galaxy being a direct ancestor of the brightest elliptical and spheroidal galaxies in the local universe.

arXiv comment18 pages, 4 figures. Accepted for publication in ApJ

References in corpus (33)

• Stellar population synthesis at the resolution of 2003
• Galactic Stellar and Substellar Initial Mass Function
• The Dust Content and Opacity of Actively Star-Forming Galaxies
• The Demography of Massive Dark Objects in Galaxy Centres
• Correcting for the Effects of Interstellar Extinction
• On the Black Hole Mass - Bulge Mass Relation
• The formation history of elliptical galaxies
• A Recipe for Galaxy Formation Shaun Cole
• Observational constraints on Cosmic Reionization
• Old Galaxies in the Young Universe
• The Gemini Deep Deep Survey: III. The abundance of massive galaxies 3-6 billion years after the Big Bang
• The Reionization of the Universe by the First Stars and Quasars
• The K20 survey. VI. The Distribution of the Stellar Masses in Galaxies up to z~2
• LBDS 53W091: An Old red Galaxy at z=1.552
• The K20 survey. I. Disentangling old and dusty star-forming galaxies in the ERO population
• Near-infrared template spectra of normal galaxies: k-corrections, galaxy models and stellar populations
• The Gemini Deep Deep Survey: I. Introduction to the Survey, Catalogs and Composite Spectra
• Fe II Emission in 14 Low-Redshift Quasars: I - Observations
• The K20 survey. VII. The spectroscopic catalogue: spectral properties and evolution of the galaxy population
• Evolved Galaxies at z > 1.5 from the Gemini Deep Deep Survey: The Formation Epoch of Massive Stellar Systems
• Near-IR bright galaxies at z~2. Entering the spheroid formation epoch ?
• The Properties and Evolution of a K-band Selected Sample of Massive Galaxies at z~0.4 - 2 in the Palomar/DEEP2 Survey
• Average spectra of massive galaxies in the SDSS
• The density of very massive evolved galaxies to z~1.7
• HST/WFPC2 Morphologies of K-selected Extremely Red Galaxies
• The Las Campanas Infra-red Survey. V. Keck Spectroscopy of a large sample of Extremely Red Objects
• Observations of OI and CaII Emission Lines in Quasars: Implications for the Site of FeII Line Emission
• Age Dating of a High-Redshift QSO B1422+231 at Z=3.62 and its Cosmological Implications
• Low-Ionization Emission Regions in Quasars: Gas Properties Probed with Broad O I and Ca II Lines
• Optical Spectroscopy of K-selected Extremely Red Galaxies
• Dating the stellar population in massive early-type galaxies at $z\sim$1.5
• Deep GMOS Spectroscopy of Extremely Red Galaxies in GOODS-South: Ellipticals, Mergers and Red Spirals at 1<z<2
• OI Line Emission in the Quasar PG 1116+215

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