Surface brightness and color distributions of elliptical and S0 galaxies. III - E galaxies in the clusters Abell 1228, Abell 2151 /Hercules/, and Abell 2199

1978 ◽  
Vol 83 ◽  
pp. 1293 ◽  
Author(s):  
K. M. Strom ◽  
S. E. Strom
Keyword(s):  
Surface Brightness ◽  
S0 Galaxies

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 Evolution of the anti-truncated stellar profiles of S0 galaxies since z = 0.6 in the SHARDS survey

2018 ◽  
Vol 615 ◽  
pp. A26 ◽  
Author(s):  
Alejandro Borlaff ◽  
M. Carmen Eliche-Moral ◽  
John E. Beckman ◽  
Alexandre Vazdekis ◽  
Alejandro Lumbreras-Calle ◽  
...  
Keyword(s):  
Surface Brightness ◽  
Rest Frame ◽  
Structural Parameters ◽  
Stellar Mass ◽  
Scaling Relations ◽  
Local Universe ◽  
Lenticular Galaxies ◽  
Type Iii ◽  
S0 Galaxies ◽  
Stable Formation

Context. Anti-truncated lenticular galaxies (Type-III S0s) present tight scaling relations between their surface brightness photometric and structural parameters. Although several evolutionary models have been proposed for the formation of these structures, the observations of Type-III S0 galaxies are usually limited to the local Universe. Aims. We aim to compare the properties of Type-III discs in a sample of S0 galaxies at 0.2 < z < 0.6 with those of the local Universe. In this paper, we study the evolution of the photometric and structural scaling relations measured in the rest-frame R-band with z and the possible differences between the rest-frame (B − R) colours of the inner and outer disc profiles. Methods. We make use of a sample of 14 Type-III E/S0–S0 galaxies at 0.2 < z < 0.6 from the GOODS-N field identified and characterised in a previous paper. We study whether or not the correlations found in local Type-III S0 galaxies were present ~6 Gyr ago. We analyse the distribution of the surface brightness characteristic parameters (Rbreak, μbreak, hi, ho, μ0,i and μ0,o) as a function of the stellar mass and look to see if there is a significant change with z. We also derive their rest-frame (B − R) colour profiles. Finally, we compare these results with the predictions from a grid of SSP models. Results. We find that the inner and outer scale-lengths of Type-III S0 galaxies at 0.4 < z < 0.6 follow compatible trends and scaling relations with those observed in local S0 galaxies as a function of the break radius, Rbreak. We do not detect any significant differences between the location of Rbreak between z ~ 0.6 and z ~ 0 for a fixed stellar mass of the object, whereas the surface brightness at the break radius μbreak is ~1.5 mag arcsec-2 dimmer in the local Universe than at z ~ 0.6 for a fixed stellar mass. We find no significant differences in the (B − R) colour between the inner and outer profiles of the Type-III S0 galaxies at 0.2 < z < 0.6. Conclusions. In contrast to Type-II (down-bending) profiles, the anti-truncated surface brightness profiles of S0 galaxies present compatible Rbreak values and scaling relations during the last 6 Gyr. This result and the similarity of the colours of the inner and outer discs point to a highly scalable and stable formation process, probably more related to gravitational and dynamical processes than to the evolution of stellar populations.

scholarly journals The haloes and environments of nearby galaxies (HERON) – I. Imaging, sample characteristics, and envelope diameters

2019 ◽  
Vol 490 (2) ◽  
pp. 1539-1569 ◽  
Author(s):  
R Michael Rich ◽  
Aleksandr Mosenkov ◽  
Henry Lee-Saunders ◽  
Andreas Koch ◽  
John Kormendy ◽  
...  
Keyword(s):  
Surface Brightness ◽  
Dwarf Galaxy ◽  
Sky Survey ◽  
Low Surface Brightness ◽  
Magnitude Diagram ◽  
The Galaxy ◽  
Nearby Galaxies ◽  
Sample Characteristics ◽  
S0 Galaxies ◽  
Red Sequence

ABSTRACT We use a dedicated 0.7-m telescope to image the haloes of 119 galaxies in the Local Volume to μr ∼ 28–30 mag arcsec−2. The sample is primarily from the Two Micron All Sky Survey Large Galaxy Atlas (Jarrett et al. 2003) and extended to include nearby dwarf galaxies and more distant giant ellipticals, and spans fully the galaxy colour–magnitude diagram including the blue cloud and red sequence. We present an initial overview, including deep images of our galaxies. Our observations reproduce previously reported low surface brightness structures, including extended plumes in M 51, and a newly discovered tidally extended dwarf galaxy in NGC 7331. Low surface brightness structures, or ‘envelopes’, exceeding 50 kpc in diameter are found mostly in galaxies with MV < −20.5, and classic interaction signatures are infrequent. Defining a halo diameter at the surface brightness 28 mag arcsec−2, we find that halo diameter is correlated with total galaxy luminosity. Extended signatures of interaction are found throughout the galaxy colour–magnitude diagram without preference for the red or blue sequences, or the green valley. Large envelopes may be found throughout the colour–magnitude diagram with some preference for the bright end of the red sequence. Spiral and S0 galaxies have broadly similar sizes, but ellipticals extend to notably greater diameters, reaching 150 kpc. We propose that the extended envelopes of disc galaxies are dominated by an extension of the disc population rather than by a classical Population II halo.

Variation of the amount of hydrogen along the galactic ridge

1967 ◽  
Vol 31 ◽  
pp. 171-172
Author(s):  
Th. Schmidt-Kaler
Keyword(s):  
Surface Brightness ◽  
Milky Way ◽  
Neutral Hydrogen ◽  
Line Of Sight ◽  
Optical Surface ◽  
Hydrogen Density ◽  
Continuous Radiation ◽  
Galactic Longitude

The integralNHof neutral-hydrogen density along the line of sight is determined from the Kootwijk and Sydney surveys. The run ofNHwith galactic longitude agrees well with that of thermal continuous radiation and that of the optical surface brightness of the Milky Way.

Surface Brightness Scale of Galactic Cepheids

1999 ◽  
Vol 190 ◽  
pp. 561-562
Author(s):  
G. P. Di Benedetto
Keyword(s):  
Surface Brightness ◽  
Variable Stars ◽  
Giant Stars ◽  
Near Ir

An accurate calibration of the surface brightness scaleSVas a function of the near-IR color (V–K) has been recently measured for non-variable Galactic dwarf and giant stars. It can be shown that this correlation can be applied to theSVscale of Galactic Cepheid variable stars, which are of major cosmological interest.

A Survey for Low Surface Brightness Galaxies around M31. II. The Newly Discovered Dwarf Andromeda VI

1999 ◽  
Vol 118 (3) ◽  
pp. 1220-1229 ◽  
Author(s):  
Taft E. Armandroff ◽  
George H. Jacoby ◽  
James E. Davies
Keyword(s):  
Surface Brightness ◽  
Low Surface Brightness ◽  
Low Surface Brightness Galaxies

Kinematics and Neutral Hydrogen Properties of the Giant Low Surface Brightness Galaxy UGC 2936

1999 ◽  
Vol 118 (2) ◽  
pp. 765-776 ◽  
Author(s):  
T. E. Pickering ◽  
J. H. van Gorkom ◽  
C. D. Impey ◽  
A. C. Quillen
Keyword(s):  
Surface Brightness ◽  
Neutral Hydrogen ◽  
Low Surface Brightness

Discovery of a Low Surface Brightness Object near Seyfert’s Sextet

2000 ◽  
Vol 119 (4) ◽  
pp. 1691-1694 ◽  
Author(s):  
Takashi Murayama ◽  
Shingo Nishiura ◽  
Tohru Nagao ◽  
Yasunori Sato ◽  
Yoshiaki Taniguchi ◽  
...  
Keyword(s):  
Surface Brightness ◽  
Low Surface Brightness
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