scholarly journals Reconstructing the mass assembly history with kinematics and nuclear light profiles

2014 ◽  
Vol 10 (S311) ◽  
pp. 45-48
Author(s):  
Davor Krajnović
Keyword(s):  
Angular Momentum ◽  
Internal Structure ◽  
Early Type ◽  
Integral Field Spectroscopy ◽  
Field Spectroscopy ◽  
Mass Assembly ◽  
Light Profiles ◽  
Integral Field

AbstractIn this contribution I show that by combining imaging and integral-field spectroscopy it is possible to unravel the internal structure of galaxies. In particular, I will present the photometric and kinematic evidence for discs linking them with stellar angular momentum content of early-type galaxies. Furthermore, I show that the existence of both fast rotators with core and slow rotators with core-less nuclear light profiles challenges the standard formation scenarios for fast and slow rotators and suggests new pathways of mass assembly.

scholarly journals The stellar structure of early-type galaxies: a wide-field Mitchell Spectrograph view

2016 ◽  
Vol 11 (S321) ◽  
pp. 288-288
Author(s):  
N. F. Boardman ◽  
A. Weijmans ◽  
R. C. E. van den Bosch ◽  
L. Zhu ◽  
A. Yildirim ◽  
...  
Keyword(s):  
Effective Radius ◽  
Stellar Structure ◽  
Wide Field ◽  
Early Type ◽  
Integral Field Spectroscopy ◽  
Field Spectroscopy ◽  
Integral Field ◽  
Made In

Much progress has been made in recent years towards understanding how early-type galaxies (ETGs) form and evolve. SAURON (Bacon et al. 2001) integral-field spectroscopy from the ATLAS3D survey (Cappellari et al. 2011) has suggested that less massive ETGs are linked directly to spirals, whereas the most massive objects appear to form from a series of merging and accretion events (Cappellari et al. 2013). However, the ATLAS3D data typically only extends to about one half-light radius (or effective radius, Re), making it unclear if this picture is truly complete.

scholarly journals Integral-Field Spectroscopic Surveys of Nearby Early–type Galaxies

2010 ◽  
Vol 6 (S277) ◽  
pp. 83-88
Author(s):  
Eric Emsellem
Keyword(s):  
Early Type ◽  
Integral Field Spectroscopy ◽  
Field Spectroscopy ◽  
Integral Field

AbstractI briefly review here a few past or on-going surveys of nearby ETGs via integral-field spectroscopy, focusing on their dynamical status, evolution, and stellar/gaseous content.

scholarly journals VIMOS mosaic integral-field spectroscopy of the bulge and disc of the early-type galaxy NGC 4697

2015 ◽  
Vol 452 (1) ◽  
pp. 99-114 ◽  
Author(s):  
C. Spiniello ◽  
N. R. Napolitano ◽  
L. Coccato ◽  
V. Pota ◽  
A. J. Romanowsky ◽  
...  
Keyword(s):  
Early Type ◽  
Integral Field Spectroscopy ◽  
Field Spectroscopy ◽  
Integral Field ◽  
Early Type Galaxy

scholarly journals Spiral galaxies in the SAURON survey

2007 ◽  
Vol 3 (S245) ◽  
pp. 271-276
Author(s):  
Reynier F. Peletier ◽  
Katia Ganda ◽  
Jesús Falcón-Barroso ◽  
Roland Bacon ◽  
Michele Cappellari ◽  
...  
Keyword(s):  
Radial Velocity ◽  
Velocity Dispersion ◽  
Spiral Galaxies ◽  
Line Strength ◽  
Early Type ◽  
Late Type ◽  
Integral Field Spectroscopy ◽  
Field Spectroscopy ◽  
New Ideas ◽  
Integral Field

AbstractWe discuss some recent integral field spectroscopy using the SAURON instrument of a sample consisting of 24 early-type spirals, part of the SAURON Survey, and 18 late-type spirals. Using 2-dimensional maps of their stellar radial velocity, velocity dispersion, and absorption line strength, it is now much easier to understand the nature of nearby galactic bulges. We discuss a few highlights of this work, and point out some new ideas about the formation of galactic bulges.

scholarly journals An Oxford SWIFT integral field spectroscopy study of 14 early-type galaxies in the Coma cluster

2012 ◽  
Vol 425 (2) ◽  
pp. 1521-1526 ◽  
Author(s):  
Nicholas Scott ◽  
Ryan Houghton ◽  
Roger L. Davies ◽  
Michele Cappellari ◽  
Niranjan Thatte ◽  
...  
Keyword(s):  
Spectroscopy Study ◽  
Early Type ◽  
Coma Cluster ◽  
Integral Field Spectroscopy ◽  
Field Spectroscopy ◽  
Integral Field

scholarly journals Key dynamical results from the SAMI Galaxy Survey

2019 ◽  
Vol 14 (S353) ◽  
pp. 213-221
Author(s):  
Jesse van de Sande ◽  
Joss Bland-Hawthorn ◽  
Dilyar Barat ◽  
Sarah Brough ◽  
Julia J. Bryant ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Stellar Population ◽  
Stellar Mass ◽  
Two Dimensional ◽  
Physical Processes ◽  
Spatially Resolved ◽  
Integral Field Spectroscopy ◽  
Field Spectroscopy ◽  
Gas Measurements ◽  
Integral Field

AbstractWe present an overview of recent key results from the SAMI Galaxy Survey on the build-up of mass and angular momentum in galaxies across morphology and environment. The SAMI Galaxy survey is a multi-object integral field spectroscopic survey and provides a wealth of spatially-resolved, two-dimensional stellar and gas measurements for galaxies of all morphological types, with high-precision due the stable spectral resolution of the AAOmega spectrograph. The sample size of ~3000 galaxies allows for dividing the sample in bins of stellar mass, environment, and star-formation or morphology, whilst maintaining a statistical significant number of galaxies in each bin. By combining imaging, spatially resolved dynamics, and stellar population measurements, our result demonstrate the power of utilising integral field spectroscopy on a large sample of galaxies to further our understanding of physical processes involved in the build-up of stellar mass and angular momentum in galaxies.

scholarly journals Formation channels of slowly rotating early-type galaxies

2020 ◽  
Vol 635 ◽  
pp. A129 ◽  
Author(s):  
Davor Krajnović ◽  
Ugur Ural ◽  
Harald Kuntschner ◽  
Paul Goudfrooij ◽  
Michael Wolfe ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Surface Brightness ◽  
Element Abundance ◽  
Nuclear Surface ◽  
Formation Processes ◽  
Early Type ◽  
Stellar Kinematics ◽  
Show Evidence ◽  
Light Profiles ◽  
Integral Field

We study the evidence for a diversity of formation processes in early-type galaxies by presenting the first complete volume-limited sample of slow rotators with both integral-field kinematics from the ATLAS3D Project and high spatial resolution photometry from the Hubble Space Telescope. Analysing the nuclear surface brightness profiles of 12 newly imaged slow rotators, we classify their light profiles as core-less, and place an upper limit to the core size of about 10 pc. Considering the full magnitude and volume-limited ATLAS3D sample, we correlate the presence or lack of cores with stellar kinematics, including the proxy for the stellar angular momentum (λRe) and the velocity dispersion within one half-light radius (σe), stellar mass, stellar age, α-element abundance, and age and metallicity gradients. More than half of the slow rotators have core-less light profiles, and they are all less massive than 1011 M⊙. Core-less slow rotators show evidence for counter-rotating flattened structures, have steeper metallicity gradients, and a larger dispersion of gradient values (Δ[Z/H]¯ = −0.42 ± 0.18) than core slow rotators (Δ[Z/H]¯ = −0.23 ± 0.07). Our results suggest that core and core-less slow rotators have different assembly processes, where the former, as previously discussed, are the relics of massive dissipation-less merging in the presence of central supermassive black holes. Formation processes of core-less slow rotators are consistent with accretion of counter-rotating gas or gas-rich mergers of special orbital configurations, which lower the final net angular momentum of stars, but support star formation. We also highlight core fast rotators as galaxies that share properties of core slow rotators (i.e. cores, ages, σe, and population gradients) and core-less slow rotators (i.e. kinematics, λRe, mass, and larger spread in population gradients). Formation processes similar to those for core-less slow rotators can be invoked to explain the assembly of core fast rotators, with the distinction that these processes form or preserve cores.

The DIVING3D Project: Analysis of the nuclear region of Early-type Galaxies

2020 ◽  
Vol 15 (S359) ◽  
pp. 454-456
Author(s):  
T. V. Ricci ◽  
J. E. Steiner ◽  
R. B. Menezes
Keyword(s):  
Emission Lines ◽  
H Ii Regions ◽  
Sample Type ◽  
Early Type ◽  
Integral Field Spectroscopy ◽  
Project Analysis ◽  
Line Region ◽  
Field Unit ◽  
Integral Field

AbstractIn this work, we present preliminary results regarding the nuclear emission lines of a statistically complete sample of 56 early-type galaxies that are part of the Deep Integral Field Spectroscopy View of Nuclei of Galaxies (DIVING3D) Project. All early type galaxies (ETGs) were observed with the Gemini Multi-Object Spectrograph Integral Field Unit (GMOS-IFU) installed on the Gemini South Telescope. We detected emission lines in 93% of the sample, mostly low-ionization nuclear emission-line region galaxies (LINERs). We did not find Transition Objects nor H II regions in the sample. Type 1 objects are seen in ∼23% of the galaxies.

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