scholarly journals Optical SED models of galaxy mergers

2011 ◽  
Vol 7 (S284) ◽  
pp. 193-197
Author(s):  
Gregory F. Snyder ◽  
T. J. Cox ◽  
Christopher C. Hayward ◽  
Lars Hernquist ◽  
Patrik Jonsson
Keyword(s):  
Three Dimensional ◽  
Interacting Galaxies ◽  
Galaxy Mergers ◽  
Hydrodynamic Simulations ◽  
Spatially Resolved ◽  
Multi Wavelength ◽  
Field Unit ◽  
Effects Of Feedback ◽  
Dust Attenuation ◽  
Integral Field

AbstractI discuss recent work in which we construct models of poststarburst galaxies by combining fully three-dimensional hydrodynamic simulations of galaxy mergers with radiative transfer calculations of dust attenuation. The poststarburst signatures can occur shortly after a bright starburst phase in gas-rich mergers, and thus offer a unique opportunity to study the formation of bulges and the effects of feedback. Several additional applications of spatially-resolved spectroscopic models of interacting galaxies include multi-wavelength studies of AGN/starburst diagnostics, mock integral field unit data to interpret the evolution of ULIRGs, and the ‘Green Valley’.Optical spectra of simulated major gas-rich galaxy mergers can be found at http://www.cfa.harvard.edu/~gsnyder

scholarly journals Spatially resolved Lyman-alpha emission from a virtual dwarf galaxy

2014 ◽  
Vol 10 (S309) ◽  
pp. 295-296
Author(s):  
Anne Verhamme
Keyword(s):  
Second Generation ◽  
Dwarf Galaxy ◽  
Spatial Variations ◽  
Lyman Alpha ◽  
Spatially Resolved ◽  
Alpha Emission ◽  
Field Unit ◽  
Integral Field

AbstractIn the context of the first light of MUSE, Integral Field Unit (IFU) spectrograph of second generation installed recently at VLT, we compute mock IFU Lyman-alpha (lyα) observations of a virtual dwarf galaxy, to help understanding and interpreting forthcoming observations. This study is an extension of the work carried out in Verhamme et al. (2012), where we studied the spatially integrated lyα properties of a dwarf galaxy. With the same data, we now investigate the spatial variations of lyα spectra.

scholarly journals Integral field observations of distant cluster galaxies

2006 ◽  
Vol 2 (S237) ◽  
pp. 489-489
Author(s):  
D. Vergani ◽  
C. Balkowski ◽  
H. Flores ◽  
V. Cayatte ◽  
F. Hammer ◽  
...  
Keyword(s):  
Structural Parameters ◽  
High Angular Resolution ◽  
Cluster Galaxies ◽  
Spatially Resolved ◽  
Optical Images ◽  
Local Measurements ◽  
Fisher Relation ◽  
Field Unit ◽  
Stellar Masses ◽  
Integral Field

AbstractWe have used the FLAMES multi-integral field unit system of the European Southern Observatory (VLT) centered on the cluster MS0451.6-0305 at z = 0.5386 to obtain the spatially resolved kinematics of the cluster members. The spectral data are supported by HST/ACS images that provide immediate morphological information of the cluster galaxies. The relevant structural parameters such as inclination, size, and orientation derived from optical high angular resolution images are compared with those derived from the kinematics. Our final goals are: 1. to derive the Tully-Fisher relation for cluster galaxies with regular kinematics. 2. to obtain the dynamical masses from resolved kinematics and stellar masses from optical images to be compared with local measurements.

scholarly journals Studying the Interstellar Medium of H II/BCD Galaxies Using IFU Spectroscopy

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Patricio Lagos ◽  
Polychronis Papaderos
Keyword(s):  
Interstellar Medium ◽  
Physical Properties ◽  
Starburst Galaxies ◽  
Chemical Abundances ◽  
Spatially Resolved ◽  
Low Mass ◽  
Field Unit ◽  
Integral Field

We review the results from our studies, and previous published work, on the spatially resolved physical properties of a sample of Hii/BCD galaxies, as obtained mainly from integral-field unit spectroscopy with Gemini/GMOS and VLT/VIMOS. We confirm that, within observational uncertainties, our sample galaxies show nearly spatially constant chemical abundances similar to other low-mass starburst galaxies. They also show Heii  λ4686 emission with the properties being suggestive of a mix of excitation sources and with Wolf-Rayet stars being excluded as the primary ones. Finally, in this contribution, we include a list of all Hii/BCD galaxies studied thus far with integral-field unit spectroscopy.

scholarly journals The Promise of Multiwavelength and IFU Observations

2009 ◽  
Vol 5 (S262) ◽  
pp. 217-224
Author(s):  
Robert C. Kennicutt ◽  
Cai-Na Hao ◽  
Benjamin D. Johnson ◽  
Fabian Rosales-Ortega ◽  
Angeles Díaz ◽  
...  
Keyword(s):  
The Other ◽  
Wide Field ◽  
Spatially Resolved ◽  
Multi Wavelength ◽  
The One ◽  
Integral Field ◽  
Field Integral

AbstractMany of the advances of the last decade in this subject have been the result of large spectroscopic surveys of galaxies on the one hand, and multi-wavelength surveys of galaxies on the other. This talk highlights applications that exploit a combination of spectroscopic and multi-wavelength diagnostics. Most applications to date have been based on spatially integrated measurements of galaxies, but the introduction of wide-field integral field spectrometers promises to extend ths approach to spatially-resolved analyses of galaxies.

A HIGH RESOLUTION INTEGRAL FIELD SPECTROGRAPH FOR THE EUROPEAN SOLAR TELESCOPE

2013 ◽  
Vol 02 (01) ◽  
pp. 1350007 ◽  
Author(s):  
A. CALCINES ◽  
R. L. LÓPEZ ◽  
M. COLLADOS
Keyword(s):  
High Resolution ◽  
Near Infrared ◽  
Optical Quality ◽  
Solar Chromosphere ◽  
Solar Telescope ◽  
Infrared Wavelength ◽  
Multi Wavelength ◽  
Integral Field Spectrograph ◽  
Field Unit ◽  
Integral Field

This paper presents the proposal of a high resolution, integral field spectrograph that is currently being designed for the 4-meter aperture European Solar Telescope that will be located in the Canary Islands. This instrument is optimized to study the solar chromosphere and photosphere to allow the investigation of several phenomena concentrated within these two layers. It will be able to observe simultaneously a bidimensional field of view of 80 arcsec2 that is reorganized, using an integral field unit, into 8 long slits of 200 arcsec length by 0.05 arcsec width. It will have the capability to observe different layers of the Sun at the same time due to its multi-wavelength capability that allows the observation of 5 visible and 3 near-infrared wavelength intervals from 3900 to 23,000 Å, with a spectral resolution of about 300,000. The designed instrument is telecentric and presents an optical quality limited by diffraction.

scholarly journals Three-Dimensional Spectroscopy and Star Formation Histories of Field E+A Galaxies

2014 ◽  
Vol 10 (S309) ◽  
pp. 361-361
Author(s):  
Charles T. Liu ◽  
Marsha Wolf ◽  
Eric J. Hooper ◽  
Joshua Bather
Keyword(s):  
Star Formation ◽  
Three Dimensional ◽  
Radio Continuum ◽  
Quenching Process ◽  
Multi Wavelength ◽  
Star Formation Histories ◽  
Initial Results ◽  
Integral Field ◽  
Early Type Galaxy ◽  
Insight Into

AbstractWe present the initial results of an integral field spectroscopic survey of E+A galaxies in the field, which combined with radio continuum measurements and multi-wavelength photometry and imaging provides significant insight into the dynamical and star formation histories of these transitioning post-starburst systems. We focus on the E+A galaxy known as G515 (z = 0.088), a massive merger remnant that began its star formation quenching process ∼ 1.0 Gyr ago. Its relatively young stellar population contrasts with its light profile and kinematics, which are more consistent with a slowly-rotating, early-type galaxy.

scholarly journals Selected aspects of the analysis of molecular line observations of edge-on circumbinary disks

2020 ◽  
Vol 642 ◽  
pp. A127
Author(s):  
R. Avramenko ◽  
S. Wolf ◽  
T. F. Illenseer ◽  
S. Rehberg
Keyword(s):  
Density Distribution ◽  
Line Emission ◽  
Density Waves ◽  
Molecular Line ◽  
Hydrodynamic Simulations ◽  
Spatially Resolved ◽  
Transition Area ◽  
Multi Wavelength ◽  
Inner Region ◽  
Innermost Region

Context. Inner cavities, accretion arms, and density waves are characteristic structures in the density distribution of circumbinary disks. They are the result of the tidal interaction of the non-axisymmetric gravitational forces of the central binary with the surrounding disk and are most prominent in the inner region, where the asymmetry is most pronounced. Aims. The goal of this study is to test the feasibility of reconstructing the gas density distribution and quantifying properties of structures in the inner regions of edge-on circumbinary disks using multiple molecular line observations. Methods. The density distribution in circumbinary disks is calculated with 2D hydrodynamic simulations. Subsequently, molecular line emission maps are generated with 3D radiative transfer simulations. Based on these, we investigate the observability of characteristic circumbinary structures located in the innermost region for spatially resolved and unresolved disks. Results. We find that it is possible to reconstruct the inner cavity, accretion arms, and density waves from spatially resolved multi-wavelength molecular line observations of circumbinary disks seen edge-on. For the spatially unresolved observations only, an estimate can be derived for the density gradient in the transition area between the cavity and the disk’s inner rim.

scholarly journals SDSS-IV MaNGA: Observational Evidence of a Density-bounded Region in a Lyα Emitter

2022 ◽  
Vol 924 (2) ◽  
pp. 47
Author(s):  
Abhishek Paswan ◽  
Kanak Saha ◽  
Claus Leitherer ◽  
Daniel Schaerer
Keyword(s):  
Gas Phase ◽  
Observational Evidence ◽  
Moderate Correlation ◽  
Spatially Resolved ◽  
Lyman Continuum ◽  
The Galaxy ◽  
Field Unit ◽  
Dust Distribution ◽  
First Time ◽  
Integral Field

Abstract Using integral field unit spectroscopy, we present here the spatially resolved morphologies of [S ii]λ6717,6731/Hα and [S ii]λ6717,6731/[O iii]λ5007 emission line ratios for the first time in a blueberry Lyα emitter (BBLAE) at z ∼ 0.047. Our derived morphologies show that the extreme starburst region of the BBLAE, populated by young (≤10 Myr), massive Wolf–Rayet stars, is [S ii] deficient, while the rest of the galaxy is [S ii] enhanced. We infer that the extreme starburst region is density-bounded (i.e., optically thin to ionizing photons), and the rest of the galaxy is ionization-bounded, indicating a Blister-type morphology. We find that the previously reported small escape fraction (10%) of Lyα photons is from our identified density-bounded H ii region of the BBLAE. This escape fraction is likely constrained by a porous dust distribution. We further report a moderate correlation between [S ii] deficiency and inferred Lyman continuum (LyC) escape fraction using a sample of confirmed LyC leakers studied in the literature, including the BBLAE studied here. The observed correlation also reveals its dependency on the stellar mass and gas-phase metallicity of the leaky galaxies. Finally, the future scope and implications of our work are discussed in detail.

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