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Related papers: Galaxy evolution in compact groups - III. Structur…

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We present the results of the classification of spectral activity types for 193 galaxies from a new sample of 49 compact groups of galaxies in the southern hemisphere (SCGs). This sample was selected in automated fashion from a digitized…

Astrophysics · Physics 2009-10-31 Roger Coziol , Angela Iovino , Reinaldo R. de Carvalho

(Abridged) Fossil systems are galaxy associations dominated by a relatively isolated, bright elliptical galaxy, surrounded by a group of smaller galaxies lacking L* objects. We analyzed the near-infrared photometric and structural…

The evolution of galaxies in groups may have important implications for the evolution of the star formation history of the universe, since many processes which operate in groups may suppress star formation and the fraction of galaxies in…

We measure the effect of the environment on the intrinsic shapes of spiral and elliptical galaxies by finding the 3D shape distribution and dust extinction that fits better the projected shape of galaxies in different environment. We find…

Astrophysics of Galaxies · Physics 2015-12-23 Silvio Rodríguez , Nelson D. Padilla , Diego García Lambas

We present the first -- of a series -- study of the evolution of galaxies in compact groups over the past 3 Gyr. This paper focuses on the evolution of the nuclear activity and how it has been affected by the dense environment of the…

Astrophysics of Galaxies · Physics 2015-05-27 T. Bitsakis , D. Dultzin , L. Ciesla , Y. Krongold , V. Charmandaris , A. Zezas

Compact groups (CGs) of galaxies offer an exceptional laboratory for the study of dense galaxian environments --- where interactions, tidally induced activity, and mergers are expected to be at their highest rate of occurrence. Here, we…

Astrophysics · Physics 2009-10-31 Sahar S. Allam , Douglas L. Tucker , Huan Lin , Yasuhiro Hashimoto

The vast majority of stars in galaxy groups are contained within their constituent galaxies. Some small fraction of stars is expected, however, to follow the global dark matter potential of the group. In compact groups, interactions between…

Astrophysics of Galaxies · Physics 2021-03-31 Denis Poliakov , Aleksandr V. Mosenkov , Noah Brosch , Shuki Koriski , R. Michael Rich

It has been shown that galaxy properties depend strongly on their host environment. In order to understand the relevant physical processes driving galaxy evolution it is important to study the observed properties of galaxies in different…

Astrophysics of Galaxies · Physics 2015-06-23 Ian D. Roberts , Laura C. Parker , Gandhali D. Joshi , Fraser A. Evans

The globular cluster (GC) specific frequency ($S_N$), defined as the number of GCs per unit galactic luminosity, represents the efficiency of GC formation (and survival) compared to field stars. Despite the naive expectation that star…

Astrophysics of Galaxies · Physics 2019-05-01 Yiqing Liu , Eric W. Peng , Andrés Jordán , John P. Blakeslee , Patrick Côté , Laura Ferrarese , Thomas H. Puzia

We study segregation phenomena in 57 groups selected from the 2PIGG catalog of galaxy groups. The sample corresponds to those systems located in areas of at least 80% redshift coverage out to 10 times the radius of the groups. The dynamical…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 Andre L. B. Ribeiro , Paulo A. A. Lopes , Marina Trevisan

We present the Kormendy and mass-size relations for early-type galaxies (ETGs) as a function of environment at z~1.3. Our sample includes 76 visually classified ETGs with masses 10^10 < M/Msun < 10^11.5, selected in the Lynx supercluster…

The distribution of galaxies on the mass-size plane as a function of redshift or environment is a powerful test for galaxy formation models. Here we use integral-field stellar kinematics to interpret the variation of the mass-size…

Cosmology and Nongalactic Astrophysics · Physics 2013-11-01 Michele Cappellari

We present results from an optical-IR photometric study of early-type galaxies in 19 galaxy clusters out to z=0.9. The galaxy sample is selected on the basis of morphologies determined from HST WFPC2 images, and is photometrically defined…

Astrophysics · Physics 2009-10-30 S. A. Stanford , Peter R. Eisenhardt , Mark Dickinson

We measure the spatial clustering of galaxies as a function of their morphological type at z~0.8, for the first time in a deep redshift survey with full morphological information. This is obtained by combining high-resolution HST imaging…

[ABRIDGED] Galaxy evolution is shaped by internal and external mechanisms that regulate the baryon cycle and star formation activity. We present a theoretical framework based on the GAlaxy Evolution and Assembly (GAEA) semi-analytic model.…

We discuss the evolution of the peculiar, nearby (z = 0.045), compact galaxy group CG J1720-67.8, by interpreting a large amount of observational information on the basis of our recent results from spectrophotometric evolutionary synthesis…

Astrophysics · Physics 2015-06-24 S. Temporin , W. Kapferer

We investigate structural properties of old, metal-poor globular clusters (GCs) formed at high redshifts (z>6) and located inside and outside virialized galaxy-scale halos in clusters of galaxies with the total masses of M_CL based on…

Astrophysics · Physics 2009-11-11 Kenji Bekki , Hideki Yahagi

The stellar structures of star-forming galaxies (SFGs) undergo significant size growth during their mass assembly and must pass through a compaction phase as they evolve into quiescent galaxies (QGs). To shed light on the mechanisms behind…

We use catalogues of superclusters of galaxies from the 2dF Galaxy Redshift Survey to study the properties of galaxies in superclusters. We compare the properties of galaxies in high and low density regions of rich superclusters, in poor…

We investigate the clustering properties and close neighbour counts for galaxies with different types of bulges and stellar masses. We select samples of "classical" and "pseudo" bulges, as well as "bulge-less" disk galaxies, based on the…

Astrophysics of Galaxies · Physics 2019-03-15 Lan Wang , Lixin Wang , Cheng Li , Jian Hu , Houjun Mo , Huiyuan Wang