scholarly journals The Near-Infrared Surface Brightness Distribution of NGC 4696

2006 ◽  
Vol 23 (1) ◽  
pp. 33-37 ◽  
Author(s):  
Pablo Arnalte Mur ◽  
Simon C. Ellis ◽  
Matthew Colless
Keyword(s):  
Free Parameter ◽  
Surface Brightness ◽  
Near Infrared ◽  
Elliptical Galaxy ◽  
Brightness Distribution ◽  
Effective Radius ◽  
Two Dimensional ◽  
Cluster Of Galaxies ◽  
Sky Survey ◽  
Fitting Algorithm

AbstractWe present H-band observations of the elliptical galaxy NGC 4696, the brightest member of the Centaurus cluster of galaxies. We have measured its light profile, using a two-dimensional fitting algorithm, out to a radius of 180 arcsec (37 h70−1 kpc). The profile is well described by a de Vaucouleurs law, with an effective radius of 35.3 ± 1.0 h70−1 kpc. There is no need for the extra free parameter allowed by a Sérsic law. Allowing for a variation of 0.3% in the sky level, the profile obtained is compatible with data from the Two-Micron All Sky Survey (2MASS). The profile shows no sign of either a truncation or an extended halo.

scholarly journals Surface Photometry of Spiral Galaxy NGC 5005 and Elliptical Galaxy NGC 4278

2018 ◽  
Vol 15 (3) ◽  
pp. 314-323
Author(s):  
Baghdad Science Journal
Keyword(s):  
Spiral Galaxy ◽  
Surface Brightness ◽  
Elliptical Galaxy ◽  
Position Angle ◽  
Sloan Digital Sky Survey ◽  
Surface Photometry ◽  
Contour Maps ◽  
Sky Survey ◽  
Flat Field ◽  
The Galaxy

Two galaxies have been chosen, spiral galaxy NGC 5005 and elliptical galaxy NGC 4278 to study their photometric properties by using surface photometric techniques with griz-Filters. Observations are obtained from the Sloan Digital Sky Survey (SDSS). The data reduction of all images have done, like bias and flat field, by SDSS pipeline. The overall structure of the two galaxies (a bulge, a disk), together with isophotal contour maps, surface brightness profiles and a bulge/disk decomposition of the galaxy images were performed, although the disk position angle, ellipticity and inclination of the galaxies have been estimated.

Variation in the near-infrared surface brightness distribution of the bipolar nebula OH 231.8 + 4.2

1992 ◽  
Vol 398 ◽  
pp. 552 ◽  
Author(s):  
Joel H. Kastner ◽  
David A. Weintraub ◽  
B. Zuckerman ◽  
E. E. Becklin ◽  
I. McLean ◽  
...  
Keyword(s):  
Surface Brightness ◽  
Near Infrared ◽  
Brightness Distribution

scholarly journals Photometric analysis of Abell 1689

2012 ◽  
Vol 8 (S295) ◽  
pp. 230-230
Author(s):  
Elena Dalla Bontà ◽  
Roger L. Davies ◽  
Ryan C. W. Houghton ◽  
Francesco D'Eugenio ◽  
Enrico M. Corsini ◽  
...  
Keyword(s):  
Surface Brightness ◽  
Rest Frame ◽  
Brightness Distribution ◽  
Decomposition Techniques ◽  
Photometric Analysis ◽  
Fundamental Plane ◽  
Fitting Algorithm ◽  
Stellar Velocity ◽  
Growth Method ◽  
S0 Galaxies

AbstractWe carried out a photometric analysis of a sample of early-type galaxies in Abell~1689 at z = 0.183, using HST/ACS archive images in the rest-frame V band. We performed a two-dimensional photometric decomposition of each galaxy surface-brightness distribution using the GASP2D fitting algorithm (Méndez-Abreu et al. 2008). We adopted both a Sérsic and de Vaucouleurs law. S0 galaxies were analysed also taking into account a disc component described by an exponential law. The derived photometric parameters, together with the ones previously obtained with the curve of growth method (Houghton et al. 2012), will be used to analyse the Fundamental Plane of Abell 1689 and quantify how it is affected by the use of different decomposition techniques (Dalla Bontà et al. 2013, in preparation). The stellar velocity dispersions of the sample galaxies were derived by using GEMINI-N/GMOS and VLT/FLAMES (D'Eugenio et al. 2013) spectroscopic data.

scholarly journals A dichotomy between HSB and LSB galaxies

1999 ◽  
Vol 171 ◽  
pp. 92-101
Author(s):  
Marc Verheijen ◽  
Brent Tully
Keyword(s):  
Dark Matter ◽  
Surface Brightness ◽  
Luminosity Function ◽  
Near Infrared ◽  
Brightness Distribution ◽  
Dark Matter Mass ◽  
Total Luminosity ◽  
Major Cluster ◽  
Baryonic Mass ◽  
Lsb Galaxies

AbstractA complete sample of spiral galaxies in the Ursa Major cluster is imaged at various optical wavelengths and in the Near-Infrared K′-band. HI rotation curves were obtained for all gas rich systems. The Near-Infrared surface brightness distribution of disk galaxies turns out to be bimodal; galaxies avoid a domain around mag/arcsec2. This bimodality is particularly striking when only the more isolated, non-interacting systems are considered. The Luminosity Function of the HSB family of galaxies is truncated well above the completion limit while the Luminosity Function of the LSB family is still sharply rising at our limiting magnitude. Near-Infrared mass-to-light ratios suggest that HSB galaxies are close to a kinematic maximum-disk situation while LSB galaxies are dark matter dominated at all radii. Assuming equal Near-Infrared mass-to-light ratios for both HSB and LSB systems, we find that the gap in the surface brightness distribution corresponds to a situation in which the baryonic mass is marginally self-gravitating. We finally conclude that the luminosity-line width relation is a fundamental correlation between the amount and distribution of dark matter mass and the total luminosity, regardless of how the luminous mass is distributed within the dark mater halo.

scholarly journals Galaxy disc central surface brightness distribution in the optical and near-infrared bands

2019 ◽  
Vol 484 (2) ◽  
pp. 1549-1562
Author(s):  
L Zhou ◽  
W Du ◽  
H Wu ◽  
Y C Liang ◽  
M He ◽  
...  
Keyword(s):  
Surface Brightness ◽  
Near Infrared ◽  
Brightness Distribution ◽  
Central Surface

scholarly journals The Southern Deep Near Infrared Survey (DENIS) a Prospect of PN Exploration

1993 ◽  
Vol 155 ◽  
pp. 39-39
Author(s):  
Stefan Kimeswenger ◽  
Christoph Kienel
Keyword(s):  
Surface Brightness ◽  
Near Infrared ◽  
Angular Resolution ◽  
Planetary Nebulae ◽  
Point Sources ◽  
Infrared Light ◽  
Sky Survey ◽  
Early Phases ◽  
Infrared Survey ◽  
Numerous Work

The near infrared light is important for the exploration of proto-planetary nebulae as well as for the planetary nebulae in early phases (Persi et. al. 1986, in Planetary and Proto-Planetary Nebulae: From IRAS to ISO, ed A. P. Martinez). Numerous work on the fluxes of the well known planetary nebulae was already done in the late 80's, but a sky survey will give a large sample of data to provide more detailed statistics.The present work presents an overview of the data on planetary nebulae expected from the European project of a deep near infrared survey of the southern sky (denis) (IAP and DESPA Paris, Heidelberg, Leiden, IAC Tenerife, Grenoble, Lyon, Frascati, Innsbruck, Vienna) in the I, J and K band with a limiting magnitude of 14.5 to 15 for point sources and 17 mag arcsec−1 for the surface brightness. The angular resolution for identification of non–point source objects will be about 5″.

scholarly journals Temperature Structure in Merging Coma Cluster of Galaxies

1998 ◽  
Vol 188 ◽  
pp. 308-309
Author(s):  
H. Honda ◽  
M. Hirayama ◽  
H. Ezawa ◽  
K. Kikuchi ◽  
T. Ohashi ◽  
...  
Keyword(s):  
Surface Brightness ◽  
Brightness Distribution ◽  
Secondary Peak ◽  
Cluster Center ◽  
Temperature Structure ◽  
Coma Cluster ◽  
X Ray ◽  
Cluster Of Galaxies ◽  
The Galaxy ◽  
Complex Distribution

The Coma cluster has been recognized as an archetype of rich and relaxed clusters, until recent ROSAT observations reveal that the intracluster medium (ICM) has a complex distribution (Briel et al. 1992; White et al. 1993). The X-ray surface brightness distribution shows a secondary peak around the galaxy NGC 4839, at 40' SW from the cluster center.

scholarly journals Finding the Bivariate Brightness Distribution of Galaxies from an HI Selected Sample

1999 ◽  
Vol 16 (1) ◽  
pp. 12-17 ◽  
Author(s):  
R. F. Minchin
Keyword(s):  
Surface Brightness ◽  
Brightness Distribution ◽  
Selection Effects ◽  
Data Cubes ◽  
Real Noise ◽  
Sky Survey ◽  
Uniform Sample ◽  
Deep Survey ◽  
Survey Results ◽  
Optical Wavelengths

AbstractA method is presented that will enable the bivariate luminosity/surface brightness distribution of galaxies to be determined from a relatively small HI selected sample. This will be taken from the HI Parkes All Sky Survey (HIPASS). The advantages of using an HI sample in order to avoid the selection effects that are present at optical wavelengths are discussed. We are developing an algorithm to automatically extract a uniform sample of galaxies from the HIPASS data cubes and to determine the parameters of these galaxies. We have so far conducted tests involving both simulated sources injected into cubes with real noise and data from the Multibeam Deep survey. Results from these tests are encouraging.

scholarly journals Near-infrared surface brightness fluctuations and optical colours of Magellanic star clusters

2005 ◽  
Vol 363 (4) ◽  
pp. 1279-1289 ◽  
Author(s):  
R. A. González-Lópezlira ◽  
M. Y. Albarrán ◽  
M. Mouhcine ◽  
M. C. Liu ◽  
G. Bruzual-A. ◽  
...  
Keyword(s):  
Surface Brightness ◽  
Near Infrared ◽  
Star Clusters ◽  
Surface Brightness Fluctuations
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