THE STELLAR INITIAL MASS FUNCTION AT 0.9 < z < 1.5

@article{MartinNavarro2014THESI,
  title={THE STELLAR INITIAL MASS FUNCTION AT 0.9 < z < 1.5},
  author={Ignacio Mart'in-Navarro and Pablo G. P'erez-Gonz'alez and Ignacio Trujillo and Pilar Esquej and Alexandre Vazdekis and Helena Dom'inguez S'anchez and Guillermo Barro and Gustavo Bruzual and St{\'e}phane Charlot and Antonio Cava and Ignacio Ferreras and N{\'e}stor Espino and Francesco La Barbera and Anton M. Koekemoer and A. J. Cenarro},
  journal={The Astrophysical Journal},
  year={2014},
  volume={798}
}
We explore the stellar initial mass function (IMF) of a sample of 49 massive quiescent galaxies (MQGs) at 0.9 10(11) M-circle dot), we find an average age of 1.7 +/- 0.3 Gyr and a bottom-heavy IMF (Gamma(b) = 3.2 +/- 0.2). Lighter MQGs (2 x 10(10) < M < 10(11) M-circle dot) at the same redshift are younger on average (1.0 +/- 0.2 Gyr) and present a shallower IMF slope (Gamma(b) = 2.7(-0.4)(+0.3)). Our results are in good agreement with the findings about the IMF slope in early-type galaxies of… 
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References

SHOWING 1-10 OF 47 REFERENCES
SALPETER NORMALIZATION OF THE STELLAR INITIAL MASS FUNCTION FOR MASSIVE GALAXIES AT z ∼ 1
The stellar initial mass function (IMF) is a key parameter for studying galaxy evolution. Here we measure the IMF mass normalization for a sample of 68 field galaxies in the redshift range 0.7-0.9
Evidence of Cosmic Evolution of the Stellar Initial Mass Function
Theoretical arguments and indirect observational evidence suggest that the stellar IMF may evolve with time, such that it is more weighted toward high-mass stars at higher redshift. Here we test this
The Initial Mass Function of Early-Type Galaxies
We determine an absolute calibration of the initial mass function (IMF) of early-type galaxies, by studying a sample of 56 gravitational lenses identified by the Sloan Lenses ACS Survey. Under the
The Stellar Mass Assembly of Galaxies from z = 0 to z = 4: Analysis of a Sample Selected in the Rest-Frame Near-Infrared with Spitzer
Using a sample of ~28,000 sources selected at 3.6-4.5 μm with Spitzer observations of the Hubble Deep Field North, the Chandra Deep Field South, and the Lockman Hole (surveyed area ~664 arcmin^2), we
Radial variations in the stellar initial mass function of early-type galaxies
The hypothesis of a universal initial mass function (IMF) -- motivated by observations in nearby stellar systems -- has been recently challenged by the discovery of a systematic variation of the IMF
Galactic stellar and substellar initial mass function
We review recent determinations of the present-day mass function (PDMF) and initial mass function (IMF) in various components of the Galaxy—disk, spheroid, young, and globular clusters—and in
Systematic variation of the stellar initial mass function with velocity dispersion in early-type galaxies
An essential component of galaxy formation theory is the stellarinitial mass function (IMF) that describes the parent distribution ofstellar mass in star-forming regions. We present observational
SPIDER VIII - constraints on the stellar initial mass function of early-type galaxies from a variety of spectral features
We perform a spectroscopic study to constrain the stellar initial mass function (IMF) by using a large sample of 24 781 early-type galaxies from the Sloan Digital Sky Survey-based Spheroids
Stellar Population Diagnostics of Elliptical Galaxy Formation
Major progress has been achieved in recent years in mapping the properties of passively-evolving, early-type galaxies (ETG) from the local universe all the way to redshift ∼2. Here, age and
A substantial population of low-mass stars in luminous elliptical galaxies
TLDR
Observations of the Na i doublet and the Wing–Ford molecular FeH band in the spectra of elliptical galaxies unambiguously detect both signatures, infer that the IMF in massive star-forming galaxies in the early Universe produced many more low-mass stars than the IMF the Milky Way disk, and was probably slightly steeper than the Salpeter form.
...
1
2
3
4
5
...