scholarly journals Resolving stellar populations with integral field spectroscopy

2019 ◽  
Vol 340 (9-10) ◽  
pp. 989-995
Author(s):  
Martin M. Roth ◽  
Peter M. Weilbacher ◽  
Norberto Castro
Keyword(s):  
Stellar Populations ◽  
Integral Field Spectroscopy ◽  
Field Spectroscopy ◽  
Integral Field

scholarly journals Stellar Populations of Brightest Cluster Galaxies and Intracluster Light

2016 ◽  
Vol 11 (S321) ◽  
pp. 193-195
Author(s):  
Louise O. V. Edwards ◽  
Isabella L. Trierweiller
Keyword(s):  
Stellar Populations ◽  
Population Synthesis ◽  
Cluster Galaxies ◽  
Integral Field Spectroscopy ◽  
Field Spectroscopy ◽  
Brightest Cluster Galaxies ◽  
Intracluster Light ◽  
Integral Field ◽  
Cluster Processes

AbstractWe present 3 representative cases from a sample of 16 local Brightest Cluster Galaxies observed using integral field spectroscopy. The observations extend to nearby neighbours and into the Intracluster Light (ICL). Population synthesis modeling shows that the ICL is younger and more metal poor compared to the BCG core and outskirts. This is consistent with a scenario in which the ICL grows by cluster processes, and alongside the growth of the BCG.

scholarly journals Constraints on core-collapse supernova progenitors from explosion site integral field spectroscopy

2018 ◽  
Vol 613 ◽  
pp. A35 ◽  
Author(s):  
H. Kuncarayakti ◽  
J. P. Anderson ◽  
L. Galbany ◽  
K. Maeda ◽  
M. Hamuy ◽  
...  
Keyword(s):  
Stellar Population ◽  
Near Infrared ◽  
Stellar Populations ◽  
Star Formation History ◽  
Initial Mass ◽  
Strong Line ◽  
Core Collapse ◽  
Integral Field Spectroscopy ◽  
Field Spectroscopy ◽  
Integral Field

Context. Observationally, supernovae (SNe) are divided into subclasses according to their distinct characteristics. This diversity naturally reflects the diversity in the progenitor stars. It is not entirely clear, however, how different evolutionary paths leading massive stars to become an SN are governed by fundamental parameters such as progenitor initial mass and metallicity. Aims. This paper places constraints on progenitor initial mass and metallicity in distinct core-collapse SN subclasses through a study of the parent stellar populations at the explosion sites. Methods. Integral field spectroscopy (IFS) of 83 nearby SN explosion sites with a median distance of 18 Mpc has been collected and analysed, enabling detection and spectral extraction of the parent stellar population of SN progenitors. From the parent stellar population spectrum, the initial mass and metallicity of the coeval progenitor are derived by means of comparison to simple stellar population models and strong-line methods. Additionally, near-infrared IFS was employed to characterise the star formation history at the explosion sites. Results. No significant metallicity differences are observed among distinct SN types. The typical progenitor mass is found to be highest for SN type Ic, followed by type Ib, then types IIb and II. Type IIn is the least associated with young stellar populations and thus massive progenitors. However, statistically significant differences in progenitor initial mass are observed only when comparing SNe IIn with other subclasses. Stripped-envelope SN progenitors with initial mass estimates lower than 25 M⊙ are found; they are thought to be the result of binary progenitors. Confirming previous studies, these results support the notion that core-collapse SN progenitors cannot arise from single-star channels only, and both single and binary channels are at play in the production of core-collapse SNe. Near-infrared IFS suggests that multiple stellar populations with different ages may be present in some of the SN sites. As a consequence, there could be a non-negligible amount of contamination from old populations, and therefore the individual age estimates are effectively lower limits.

scholarly journals The SLUGGS Survey: A New Mask Design to Reconstruct the Stellar Populations and Kinematics of Both Inner and Outer Galaxy Regions

2016 ◽  
Vol 33 ◽  
Author(s):  
Nicola Pastorello ◽  
Duncan A. Forbes ◽  
Adriano Poci ◽  
Aaron J. Romanowsky ◽  
Richard McDermid ◽  
...  
Keyword(s):  
Spatial Scales ◽  
Stellar Populations ◽  
Large Field ◽  
Nearby Galaxy ◽  
Stellar Kinematics ◽  
Integral Field Spectroscopy ◽  
Field Spectroscopy ◽  
Mask Design ◽  
Field Unit ◽  
Integral Field

AbstractIntegral field unit spectrographs allow the 2D exploration of the kinematics and stellar populations of galaxies, although they are generally restricted to small fields-of-view. Using the large field-of-view of the DEIMOS multislit spectrograph on Keck and our Stellar Kinematics using Multiple Slits technique, we are able to extract sky-subtracted stellar light spectra to large galactocentric radii. Here, we present a new DEIMOS mask design named SuperSKiMS that explores large spatial scales without sacrificing high spatial sampling. We simulate a set of observations with such a mask design on the nearby galaxy NGC 1023, measuring stellar kinematics and metallicities out to where the galaxy surface brightness is orders of magnitude fainter than the sky. With this technique we also reproduce the results from literature integral field spectroscopy in the innermost galaxy regions. In particular, we use the simulated NGC 1023 kinematics to model its total mass distribution to large radii, obtaining comparable results with those from published integral field unit observation. Finally, from new spectra of NGC 1023, we obtain stellar 2D kinematics and metallicity distributions that show good agreement with integral field spectroscopy results in the overlapping regions. In particular, we do not find a significant offset between our Stellar Kinematics using Multiple Slits and the ATLAS3D stellar velocity dispersion at the same spatial locations.

scholarly journals Stellar populations in bulges and disks and the secular evolution connection

2012 ◽  
Vol 10 (H16) ◽  
pp. 336-336
Author(s):  
Reynier Peletier
Keyword(s):  
Stellar Populations ◽  
Secular Evolution ◽  
Integral Field Spectroscopy ◽  
Field Spectroscopy ◽  
Central Regions ◽  
Integral Field

AbstractIn recent years a considerable amount of new data has become available about stellar populations in the central regions of galaxies. I will discuss what stellar populations can tell us about the formation origin of bulges, and how this relates to the formation of the central regions in giant and dwarf ellipticals. In particular I will concentrate on results from integral field spectroscopy and Spitzer imaging at 3.6, 4.5 and 8 microns.

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.

Testing commercial variable fiber attenuators and lenslet arrays for equalized integral field spectroscopy applications

2008 ◽  
Author(s):  
F. Gracia-Temich ◽  
B. García-Lorenzo ◽  
Y. Padilla-Michel ◽  
J. F. M. Escobar-Romero ◽  
J. J. Fuensalida ◽  
...  
Keyword(s):  
Integral Field Spectroscopy ◽  
Field Spectroscopy ◽  
Integral Field

scholarly journals Ionization structure and chemical abundances of the Wolf-Rayet nebula NGC 6888 with integral field spectroscopy

2012 ◽  
Vol 541 ◽  
pp. A119 ◽  
Author(s):  
A. Fernández-Martín ◽  
D. Martín-Gordón ◽  
J. M. Vílchez ◽  
E. Pérez Montero ◽  
A. Riera ◽  
...  
Keyword(s):  
Chemical Abundances ◽  
Integral Field Spectroscopy ◽  
Field Spectroscopy ◽  
Ionization Structure ◽  
Integral Field
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