Structure and Kinematics of Early-Type Galaxies from Integral Field Spectroscopy

By M. Cappellari. 2016

333 citations recorded by the source corpus.

Observations of galaxy isophotes, long-slit kinematics, and high-resolution photometry suggested a possible dichotomy between two distinct classes of elliptical galaxies. But these methods are expensive for large galaxy samples. Instead, integral field spectroscopy can efficiently recognize the shape, dynamics, and stellar population of complete samples of early-type galaxies (ETGs). These studies showed that the two main classes, the fast and slow rotators, can be separated using stellar kinematics. I show that there is a dichotomy in the dynamics of the two classes. The slow rotators are weakly triaxial and dominate above . Below Mcrit, the structure of fast rotators parallels that of spiral galaxies. There is a smooth sequence along which the age, the metal content, the enhancement in α-elements, and the weight of the stellar initial mass function all increase with the central mass density slope, or bulge mass fraction, while the molecular gas fraction correspondingly decreases. The properties of ETGs ...

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/23e390a609fabd3367be8ae29c08e0e9964a7b58

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Citations in the corpus

One Law to Rule Them All: The Radial Acceleration Relation of Galaxies (2016, methodology): “These two data sets roughly correspond to two different “families” of ETGs (e.g., Kormendy & Bender 1996; Kormendy 2009; Cappellari 2016): rotating ETGs from Atlas3D are either lenticulars or disky ellipticals, while X−ray ETGs are generally giant boxy ellipticals.”
TDCOSMO. I. An exploration of systematic uncertainties in the inference of $H_0$ from time-delay cosmography (2019, background): “…primarily from the increase in dark-to-stellar matter ratio, a systematic change in stellar initial mass function with galaxy stellar mass, and possibly a small subdominant contribution from systematic variations in stellar orbits anisotropy A101, page 7 of 19 (Auger et al. 2010; Cappellari 2016).”
The distribution of dark matter in galaxies (2018, methodology): “…in which the dispersion velocity combine with the rotation motions to balance the galaxy self-gravity, there is a simple and efficient anisotropic generalization of the axisymmetric Jeans formalism which is used to model the stellar kinematics of galaxies (see Cappellari (2016) for details).”
Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions (2016, methodology): “The technology is now available on all major telescopes and has become the standard way of obtaining spectra for galaxy evolution studies (see Cappellari 2016, for a review).”