Properties of Stellar Populations of Eight Galactic Global Clusters with Low Central Surface Brightness

2021 ◽  
Vol 65 (6) ◽  
pp. 455-476
Author(s):  
M. E. Sharina ◽  
M. I. Maricheva
Keyword(s):  
Surface Brightness ◽  
Stellar Populations ◽  
Central Surface

scholarly journals A large sample of low surface brightness disk galaxies from SDSS

2008 ◽  
Vol 4 (S252) ◽  
pp. 131-132
Author(s):  
G. H. Zhong ◽  
Y. C. Liang ◽  
L. C. Deng ◽  
B. Zhang
Keyword(s):  
Surface Brightness ◽  
Stellar Populations ◽  
Disk Galaxies ◽  
Large Sample ◽  
Central Surface ◽  
Main Galaxy ◽  
Low Surface Brightness ◽  
Galaxy Sample

AbstractWe present the properties of a large sample (12,282) of nearly face-on low surface brightness disk galaxies selected from the main galaxy sample of SDSS-DR4. Those properties includes B-band central surface brightness μ0(B), scale lengths h, distances D, integrated magnitudes, colors and some resulted relations. This sample has μ0(B) from 22 to 24.5 mag arcsec−2 with a median value of 22.44 mag arcsec−2. They are quite bright with MB taking values from −18 to −23 mag with a median value of −20.08 mag. The disk scale lengths h are from 2 kpc to 19 kpc. There exist clear correlations between log h and MB, log h and log D. Both the optical-optical and optical-NIR color-color relations show most of them have a mix of young and old stellar populations.

scholarly journals The properties of a large sample of low surface brightness galaxies from SDSS

2009 ◽  
Vol 5 (S262) ◽  
pp. 213-216
Author(s):  
Y. C. Liang ◽  
G. H. Zhong ◽  
X. Y. Chen ◽  
D. Gao ◽  
F. Hammer ◽  
...  
Keyword(s):  
Surface Brightness ◽  
Stellar Populations ◽  
Disk Galaxies ◽  
Large Sample ◽  
Central Surface ◽  
Low Surface Brightness ◽  
Stellar Masses ◽  
Low Surface Brightness Galaxies ◽  
Lsb Galaxies

AbstractA large sample of low surface brightness (LSB) disk galaxies is selected from SDSS with B-band central surface brightness μ0(B) from 22 to 24.5 mag arcsec−2. Some of their properties are studied, such as magnitudes, surface brightness, scalelengths, colors, metallicities, stellar populations, stellar masses and multiwavelength SEDs from UV to IR etc. These properties of LSB galaxies have been compared with those of the galaxies with higher surface brightnesses. Then we check the variations of these properties following surface brightness.

scholarly journals Stellar Populations of the Most Massive Galaxies

2009 ◽  
Vol 5 (S267) ◽  
pp. 459-459
Author(s):  
Alexander Fritz ◽  
Michael D. Hoenig ◽  
Ricardo P. Schiavon
Keyword(s):  
High Velocity ◽  
Surface Brightness ◽  
Stellar Populations ◽  
Spectroscopic Properties ◽  
Low Density ◽  
Early Type ◽  
Small Surface ◽  
Fundamental Plane ◽  
Massive Galaxies ◽  
Bona Fide

Within the hierarchical CDM framework, gas-poor mergers contribute substantially to the building of the most massive galaxies (Faber et al. 2007). We want to test this scenario by studying the fundamental plane (FP) and the stellar populations of the most massive galaxies. We investigate a well-defined sample of massive early-type galaxies at 0.1<z<0.4, identified from the SDSS database. Out of 42,000 possible targets in the SDSS database, we extracted 23 luminous early-type galaxies with bona fide high velocity dispersions of σ>350 km s−1. These systems are located either in high or low-density environments and show a variety of small surface-brightness structure. Using archival HST/ACS images and Gemini/GMOS spectroscopy, we will explore the photometric and spectroscopic properties of these galaxies.

scholarly journals Dwarf Galaxies in Nearby Groups

1999 ◽  
Vol 171 ◽  
pp. 154-156
Author(s):  
T. Bremnes ◽  
B. Binggeli ◽  
P. Prugniel
Keyword(s):  
Surface Brightness ◽  
Dwarf Galaxies ◽  
Photometric Data ◽  
Preliminary Results ◽  
Central Surface ◽  
Total Magnitude ◽  
Evolutionary Connection

AbstractWe present preliminary results from two observing campaigns where global photometric data for most dwarf galaxies in the M81 and M101 groups as well as some field dwarfs were obtained. The galaxies in the denser M81 group are more often of dwarf elliptical type and are redder and fainter than those of the M101 group and surrounding field, which are mostly of the dwarf irregular types. But both types follow the same total magnitude - central surface brightness relation, so there might be an evolutionary connection between the two classes.

scholarly journals The Structure of Collapsed Cluster Cores

1988 ◽  
Vol 126 ◽  
pp. 657-658
Author(s):  
Phyllis M. Lugger ◽  
Haldan Cohn ◽  
Jonathan E. Grindlay ◽  
Charles D. Bailyn ◽  
Paul Hertz
Keyword(s):  
Power Law ◽  
Globular Clusters ◽  
Surface Brightness ◽  
Core Collapse ◽  
Central Surface ◽  
Core Profile ◽  
Galactic Globular Clusters ◽  
Cluster Cores

In order to test the prediction that many Galactic globular clusters have undergone core collapse (Lightman 1982, Cohn and Hut 1984) and should therefore have central surface brightness cusps, we have obtained UBVR CCD frames of the cores of 72 clusters. We present and analyze U-band surface brightness profiles for three clusters: one “control cluster” with a normal flat core profile — NGC 6388 — and two with central power law cusps — NGC 6624 and M15 (NGC 7078).

A Wide Field CCD Survey for Low Surface Brightness Galaxies.II.Color Distributions, Stellar Populations, and Missing Baryons

1997 ◽  
Vol 114 ◽  
pp. 2448 ◽  
Author(s):  
Karen O'Neil ◽  
G. D. Bothun ◽  
J. Schombert ◽  
Mark E. Cornell ◽  
C. D. Impey
Keyword(s):  
Surface Brightness ◽  
Stellar Populations ◽  
Wide Field ◽  
Low Surface Brightness

scholarly journals The effects of dust on the derived photometric parameters of disks and bulges in spiral galaxies

2012 ◽  
Vol 8 (S292) ◽  
pp. 290-290
Author(s):  
B. A. Pastrav ◽  
C. C. Popescu ◽  
R. J. Tuffs ◽  
A. E. Sansom
Keyword(s):  
Surface Brightness ◽  
Spiral Galaxies ◽  
Intrinsic Value ◽  
Central Surface ◽  
Intrinsic Values ◽  
Balmer Lines ◽  
The One ◽  
The Individual ◽  
Dust Effects ◽  
Simulated Images

AbstractHere we present results on the effects of dust on the derived Sérsic index of disks and bulges. This is part of a larger study (see Pastrav et al. 2012a, Pastrav et al. 2012b) that quantifies the dust effects on all photometric parameters, including scale-lengths, axis-ratios, central surface brightness and effective radii of individual and decomposed (from B/D decomposition) disks and bulges. The effects of dust are derived for both broadband and narrow line (Balmer lines) images. The changes in the derived photometric parameters from their intrinsic values (as seen in the absence of dust) were obtained by fitting simulated images of disks and bulges produced using radiative transfer calculations and the model of Popescu et al. (2011). This study follows on the analysis of Möllenhoff et al. (2006), who quantified the effects of dust on the photometry of old stellar disks seen at low and intermediate inclination. We extend the study to disks at all inclinations and we investigate the changes in the photometry of young stellar disks and bulges. For the individual components, in the majority of cases: 1) the dust lowers the Sérsic index from its intrinsic value; 2) the Sérsic index decreases as the inclination and the B band central face-on dust opacity, τBf, increase. For the decomposed disks and bulges, dust slightly increases the Sérsic index as compared with the one derived on individual components (e.g. Fig. 1); this effect is stronger for higher values of the inclination, τBf and B/D.

scholarly journals Properties of galaxies in the disc central surface brightness gap

2015 ◽  
Vol 455 (3) ◽  
pp. 2644-2655 ◽  
Author(s):  
Jenny G. Sorce ◽  
Peter Creasey ◽  
Noam I. Libeskind
Keyword(s):  
Surface Brightness ◽  
Central Surface
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