scholarly journals A 3D analysis of the metal distribution in the compact group of galaxies HCG 31

2014 ◽  
Vol 10 (S309) ◽  
pp. 363-363
Author(s):  
Sergio Torres-Flores ◽  
Claudia Mendes de Oliveira ◽  
Mayte Alfaro-Cuello ◽  
Eleazar Rodrigo Carrasco ◽  
Duilia de Mello ◽  
...  
Keyword(s):  
High Resolution ◽  
Compact Group ◽  
Central Region ◽  
Metal Distribution ◽  
3D Analysis ◽  
Data Set ◽  
Merging Galaxies ◽  
Fabry Perot ◽  
Field Unit ◽  
Integral Field

AbstractWe present new Gemini/GMOS integral field unit observations of the central region of the merging compact group of galaxies HCG 31. Using this data set, we derive the oxygen abundances for the merging galaxies HCG 31A and HCG 31C. We found a smooth metallicity gradient between the nuclei of these galaxies, suggesting a mixing of metals between these objects. These results are confirmed by high-resolution Fabry-Perot data, from which we infer that gas is flowing between HCG 31A and HCG 31C.

Great opportunity for NGST-NIRSPEC: a high-resolution integral field unit

2003 ◽  
Author(s):  
Eric Prieto ◽  
Christophe Bonneville ◽  
Pierre Ferruit ◽  
Jeremy R. Allington-Smith ◽  
Roland Bacon ◽  
...  
Keyword(s):  
High Resolution ◽  
Great Opportunity ◽  
Field Unit ◽  
Integral Field

scholarly journals ESO Spectroscopic Facility

2017 ◽  
Vol 13 (S334) ◽  
pp. 242-247
Author(s):  
Luca Pasquini ◽  
B. Delabre ◽  
R. S. Ellis ◽  
J. Marrero ◽  
L. Cavaller ◽  
...  
Keyword(s):  
High Resolution ◽  
Wavelength Range ◽  
Focal Plane ◽  
Working Group ◽  
Field Of View ◽  
High Resolution Spectroscopy ◽  
Wide Field ◽  
Low Resolution ◽  
Field Unit ◽  
Integral Field

AbstractWe present the concept of a novel facility dedicated to massively-multiplexed spectroscopy. The telescope has a very wide field Cassegrain focus optimised for fibre feeding. With a Field of View (FoV) of 2.5 degrees diameter and a 11.4m pupil, it will be the largest etendue telescope. The large focal plane can easily host up to 16.000 fibres. In addition, a gravity invariant focus for the central 10 arc-minutes is available to host a giant integral field unit (IFU). The 3 lenses corrector includes an ADC, and has good performance in the 360-1300 nm wavelength range. The top level science requirements were developed by a dedicated ESO working group, and one of the primary cases is high resolution spectroscopy of GAIA stars and, in general, how our Galaxy formed and evolves. The facility will therefore be equipped with both, high and low resolution spectrographs. We stress the importance of developing the telescope and instrument designs simultaneously. The most relevant R&D aspect is also briefly discussed.

scholarly journals Galactic bulges: the importance of early formation scenarios vs. secular evolution

2014 ◽  
Vol 10 (S309) ◽  
pp. 163-164
Author(s):  
Marja K. Seidel ◽  
R. Cacho ◽  
T. Ruiz-Lara ◽  
J. Falcón-Barroso ◽  
I. Pérez ◽  
...  
Keyword(s):  
High Resolution ◽  
Stellar Mass ◽  
Stellar Content ◽  
Secular Evolution ◽  
Early Formation ◽  
Depth Analysis ◽  
Formation And Evolution ◽  
Field Unit ◽  
Integral Field ◽  
Negligible Contribution

AbstractWe study the stellar content of three galactic bulges with the high resolution gratings (R=7000) of the WiFeS integral field unit in order to better understand their formation and evolution. In all cases we find that at least 50% of the stellar mass already existed 12 Gyrs ago, more than currently predicted by simulations. A younger component (age between ∼1 to ∼8 Gyrs) is also prominent and its present day distribution seems to be much more affected by morphological structures, especially bars, than the older one. This in-depth analysis supports the notion of increasing complexity in bulges which cannot be achieved by mergers alone, but requires a non-negligible contribution from secular evolution.

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 Probing the nature of the pre-merging system Hickson Compact Group 31 through integral field unit data

2015 ◽  
Vol 453 (2) ◽  
pp. 1355-1370 ◽  
Author(s):  
M. Alfaro-Cuello ◽  
S. Torres-Flores ◽  
E. R. Carrasco ◽  
C. Mendes de Oliveira ◽  
D. F. de Mello ◽  
...  
Keyword(s):  
Compact Group ◽  
Field Unit ◽  
Integral Field

TEIFU: a high-resolution integral field unit for the William Herschel Telescope

2000 ◽  
Author(s):  
Graham J. Murray ◽  
Jeremy R. Allington-Smith ◽  
Robert Content ◽  
George N. Dodsworth ◽  
Colin N. Dunlop ◽  
...  
Keyword(s):  
High Resolution ◽  
Field Unit ◽  
William Herschel ◽  
Integral Field

scholarly journals High-resolution MEGARA Integral-field Unit Spectroscopy and Structural Analysis of a Fast-rotating, Disky Bulge in NGC 7025

2019 ◽  
Vol 871 (1) ◽  
pp. 9 ◽  
Author(s):  
Bililign T. Dullo ◽  
Mario Chamorro-Cazorla ◽  
Armando Gil de Paz ◽  
África Castillo-Morales ◽  
Jesús Gallego ◽  
...  
Keyword(s):  
Structural Analysis ◽  
High Resolution ◽  
Field Unit ◽  
Integral Field ◽  
Fast Rotating

scholarly journals H i-MaNGA: H i follow-up for the MaNGA survey

2019 ◽  
Vol 488 (3) ◽  
pp. 3396-3405 ◽  
Author(s):  
Karen L Masters ◽  
David V Stark ◽  
Zachary J Pace ◽  
Frederika Phipps ◽  
Wiphu Rujopakarn ◽  
...  
Keyword(s):  
Gas Content ◽  
Data Set ◽  
Sky Surveys ◽  
Nearby Galaxies ◽  
L Band ◽  
Field Unit ◽  
Green Bank Telescope ◽  
Integral Field ◽  
Cross Match

Abstract We present the H i-MaNGA programme of H i follow-up for the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey. MaNGA, which is part of the Fourth phase of the Sloan Digital Sky Surveys, is in the process of obtaining integral field unit spectroscopy for a sample of ∼10 000 nearby galaxies. We give an overview of the H i 21cm radio follow-up observing plans and progress and present data for the first 331 galaxies observed in the 2016 observing season at the Robert C. Bryd Green Bank Telescope. We also provide a cross-match of the current MaNGA (DR15) sample with publicly available H i data from the Arecibo Legacy Fast Arecibo L-band Feed Array survey. The addition of H i data to the MaNGA data set will strengthen the survey’s ability to address several of its key science goals that relate to the gas content of galaxies, while also increasing the legacy of this survey for all extragalactic science.

scholarly journals Evidence of Expansion in the Central Region of NGC 2346

1989 ◽  
Vol 131 ◽  
pp. 187-187
Author(s):  
D.P.K. Banerjee ◽  
B. G. Anandarao ◽  
J. N. Desai ◽  
S. K. Jain ◽  
D.C.V. Mallik
Keyword(s):  
High Resolution ◽  
Spectral Range ◽  
Central Region ◽  
Planetary Nebula ◽  
Signal To Noise Ratio ◽  
Emission Lines ◽  
Expansion Velocity ◽  
Signal To Noise ◽  
Central Spot ◽  
Fabry Perot

We present observations of the bipolar planetary nebula NGC 2346 carried out with the 1-m telescope at the Vainu Bappu Observatory in Kavalur, India using (1) a high resolution piezo-electric scanned Fabry-Pérot Spectrometer (with a velocity resolution of 10 km s−1) for line studies in the 6000 A - 7000 A spectral range and (2) a pressure scanned Fabry-Pérot spectrometer (with a velocity-resolution of 5 km s−1) in the green region. The nebula was observed in the H I 6563 A and [N II] 6583 A emission lines using a 15″ aperture and in the [O III] 5007 A line using an 8″ aperture centered on the bright central spot. A number of scans in each of these lines were co-added to improve the signal-to-noise ratio. The [O III] profile shows a well defined split between the blue and the red component, typical of an expanding shell. The [N II] profile does not show a well resolved split, although a pronounced suggestion of a split was observed in all the scans. The Hα profile was broad and asymmetric. The composite [O III] and [N II] profiles were decomposed into two individual Gaussians for obtaining the expansion velocity.

Algorithms for automated montage synthesis of images from laser-scanning confocal microscopes

1995 ◽  
Vol 53 ◽  
pp. 650-651
Author(s):  
D. E. Becker
Keyword(s):  
Image Analysis ◽  
High Resolution ◽  
Laser Scanning ◽  
Cell Counting ◽  
Wide Area ◽  
Data Set ◽  
Computational Synthesis ◽  
Automated Cell Counting ◽  
Partial View ◽  
The Individual

An efficient, robust, and widely-applicable technique is presented for computational synthesis of high-resolution, wide-area images of a specimen from a series of overlapping partial views. This technique can also be used to combine the results of various forms of image analysis, such as segmentation, automated cell counting, deblurring, and neuron tracing, to generate representations that are equivalent to processing the large wide-area image, rather than the individual partial views. This can be a first step towards quantitation of the higher-level tissue architecture. The computational approach overcomes mechanical limitations, such as hysterisis and backlash, of microscope stages. It also automates a procedure that is currently done manually. One application is the high-resolution visualization and/or quantitation of large batches of specimens that are much wider than the field of view of the microscope.The automated montage synthesis begins by computing a concise set of landmark points for each partial view. The type of landmarks used can vary greatly depending on the images of interest. In many cases, image analysis performed on each data set can provide useful landmarks. Even when no such “natural” landmarks are available, image processing can often provide useful landmarks.

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