scholarly journals Wide-Field Survey around Local Group Dwarf Spheroidal Galaxy Leo II: Spatial Distribution of Stellar Content

2007 ◽  
Vol 134 (2) ◽  
pp. 835-845 ◽  
Author(s):  
Yutaka Komiyama ◽  
Mamoru Doi ◽  
Hisanori Furusawa ◽  
Masaru Hamabe ◽  
Katsumi Imi ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Field Survey ◽  
Local Group ◽  
Wide Field ◽  
Stellar Content

scholarly journals A Subaru/Suprime-Cam wide-field survey of globular cluster populations around M87 - II. Colour and spatial distribution

2006 ◽  
Vol 373 (2) ◽  
pp. 601-612 ◽  
Author(s):  
N. Tamura ◽  
R. M. Sharples ◽  
N. Arimoto ◽  
M. Onodera ◽  
K. Ohta ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Globular Cluster ◽  
Field Survey ◽  
Wide Field

scholarly journals Stellar Photometry by Wide Field CCDs: NGC 6822

1994 ◽  
Vol 161 ◽  
pp. 305-308
Author(s):  
A. Aparicio ◽  
C. Gallart ◽  
J.M. Vílchez
Keyword(s):  
Local Group ◽  
Main Body ◽  
Wide Field ◽  
Stellar Content ◽  
Irregular Galaxy ◽  
Stellar Photometry ◽  
Spread Function ◽  
Magnitude Diagram ◽  
Ngc 6822

A wide-field CCD has been used to obtain photometry of resolved stars in the main body of the Local Group Dwarf Irregular Galaxy NGC 6822. Under good seeing conditions, the relatively large pixel size of the chip produces a poor sampling of the stellar profiles. This paper discusses how this undersampling affects the quality of the photometry and shows that this problem can be overcome when the point-spread function is suitably modelled. Finally, a brief discussion of the stellar content of NGC 6822 is given in the light of the [(V-R), V] colour-magnitude diagram.

First Results From the Local Group Census: Planetary Nebulae in Sextans B

2003 ◽  
Vol 209 ◽  
pp. 561-561
Author(s):  
R.L.M. Corradi ◽  
L. Magrini ◽  
N. A. Walton ◽  
A. A. Zijlstra ◽  
J. R. Walsh ◽  
...  
Keyword(s):  
Field Survey ◽  
Local Group ◽  
Planetary Nebulae ◽  
Field Of View ◽  
Wide Field ◽  
Isaac Newton ◽  
First Results ◽  
Isaac Newton Telescope

The Local Group Census is a narrowband survey of all the galaxies of the Local Group (LG) with Dec ≥ −30°, being carried out as part of the Isaac Newton Group's Wide Field Survey programme. Observations are being obtained with the Wide Field Camera at the 2.5m Isaac Newton telescope, equipped with a mosaic of four 2k x 4k EEV CCDs covering a field of view of 34′ x 34′.

The Stellar Content of the Local Group Dwarf Galaxy Phoenix

1999 ◽  
Vol 118 (2) ◽  
pp. 862-882 ◽  
Author(s):  
D. Martínez-Delgado ◽  
C. Gallart ◽  
A. Aparicio
Keyword(s):  
Local Group ◽  
Dwarf Galaxy ◽  
Stellar Content

scholarly journals A Wide‐Field Survey of Twoz∼ 0.5 Galaxy Clusters: Identifying the Physical Processes Responsible for the Observed Transformation of Spirals into S0s

2007 ◽  
Vol 671 (2) ◽  
pp. 1503-1522 ◽  
Author(s):  
Sean M. Moran ◽  
Richard S. Ellis ◽  
Tommaso Treu ◽  
Graham P. Smith ◽  
R. Michael Rich ◽  
...  
Keyword(s):  
Galaxy Clusters ◽  
Field Survey ◽  
Wide Field ◽  
Physical Processes

scholarly journals Resolved Stellar Populations of the interacting galaxies of the M81 group

2016 ◽  
Vol 11 (S321) ◽  
pp. 22-24
Author(s):  
Sakurako Okamoto ◽  
Nobuo Arimoto ◽  
Annette M.N. Ferguson ◽  
Edouard J. Bernard ◽  
Mike J. Irwin ◽  
...  
Keyword(s):  
Main Sequence ◽  
Field Survey ◽  
State Of The Art ◽  
Young Stars ◽  
Interacting Galaxies ◽  
Wide Field ◽  
Red Giant ◽  
Tidal Streams ◽  
Stellar Associations ◽  
First Time

AbstractWe present the results from the state-of-the-art wide-field survey of the M81 galaxy group that we are conducting with Hyper Suprime-Cam on Subaru Telescope. Our photometry reaches about 2 mag below the tip of the red giant branch (RGB) and reveals the spatial distribution of both old and young stars over an area of 5°2around the M81. The young main-sequence (MS) stars closely follow the HI distribution and can be found in a stellar stream between M81 and NGC 3077 and in numerous outlying stellar associations. Our survey also reveals for the first time the very extended (>2 × R25) halos of RGB stars around M81, M82, and NGC 3077, as well as faint tidal streams that link these systems. The gravitational interactions between M81, M82 and NGC 3077 galaxies induced star formation in tidally stripped gas, and also significantly perturbed the older stellar components leading to disturbed halo morphologies.

scholarly journals Looking towards the detection of exoearths with SuperWASP

2006 ◽  
Vol 5 (3) ◽  
pp. 183-186
Author(s):  
R.A. Street ◽  
D.J. Christian ◽  
W.I. Clarkson ◽  
A.C. Cameron ◽  
B. Enoch ◽  
...  
Keyword(s):  
South African ◽  
Field Survey ◽  
Astronomical Observatory ◽  
Wide Field ◽  
La Palma ◽  
Automated Algorithm ◽  
First Results ◽  
Gravitational Pull ◽  
Low Amplitude ◽  
Host Stars

The WASP consortium is conducting an ultra-wide field survey of stars between 8–15 mag from both hemispheres. Our primary science goal is to detect extra-solar ‘hot-Jupiter’-type planets that eclipse (or transit) bright host stars and for which further detailed investigation will be possible. We summarize the design of the SuperWASP instruments and describe the first results from our northern station SW-N, sited in La Palma, Canary Islands. Our second station, which began operations this year, is located at the South African Astronomical Observatory. Between April and September, 2004, SW-N continuously observed ~6.7 million stars. The consortium's custom-written, fully automated data reduction pipeline has been used to process these data, and the information is now stored in the project archive, held by the Leicester database and archive service (LEDAS). We have applied a sophisticated, automated algorithm to identify the low-amplitude (~0.01 mag), brief (~few hours) signatures of transiting exoplanets. In addition, we have assessed each candidate in the light of all available catalogue information in order to reject data artefacts and astrophysical false positive detections. The highest priority candidates are currently being subjected to further observations in order to select the true planets. Once the exoplanets are confirmed, a host of exciting opportunities are open to us. In this paper, we describe two techniques that exploit the transits in order to detect other objects within the same system. The first involves determining precise epochs for a sequence of transit events in order to detect the small timing variations caused by the gravitational pull of other planets in the same system. The second method employs ultra-high precision photometry of the transits to detect the deviations caused by the presence of exoplanetary moons. Both of these techniques are capable of detecting objects the size of terrestrial planets.

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