Results 131 to 140 of about 517,834 (312)

Oxygen and Neon Abundances of Planetary Nebulae in the Elliptical Galaxy NGC 4697 [PDF]

, 2005
This paper presents deep spectra of 14 planetary nebulae (PNs) at a variety of angular distances from the center of the flattened elliptical galaxy NGC 4697, which is located at ~11 Mpc from us.
R. Méndez, D. Thomas, R. Saglia, C. Maraston, R. Kudritzki, R. Bender   +5 more
semanticscholar   +1 more source

Dissipational versus Dissipationless Galaxy Formation and the Dark Matter Content of Galaxies

, 2010
We examine two extreme models for the build-up of the stellar component of luminous elliptical galaxies. In one case, we assume the build-up of stars is dissipational, with centrally accreted gas radiating away its orbital and thermal energy; the dark ...
Abadi, Abadi, Bernardi, Bernardi, Bezanson, Bode, Bode, C. N. Lackner, Cappellari, Cooray, de Blok, Diemand, El-Zant, El-Zant, Fukushige, Gao, Gilmore, Gnedin, Gnedin, Gonzalez, Inada, J. P. Ostriker, Jardel, Jesseit, Johansson, Kazantzidis, Kuhlen, Lauer, Lin, Lin, Loeb, Milosavljević, Naab, Naab, Navarro, Navarro, Oh, Pahre, Pooley, Rhee, Romano-Díaz, Romano-Díaz, Sand, Schechter, Sersic, Simon, Spekkens, Subramanian, Swaters, Tonini, Tremaine, Treu, Treu, Valenzuela, van der Wel, van Dokkum, Vass, Weinberg, Woźniak   +58 more
core   +1 more source

The Globular Cluster System of the Virgo Dwarf Elliptical Galaxy VCC 1087 [PDF]

, 2005
We present an analysis of the globular cluster (GC) system of the nucleated dwarf elliptical galaxy VCC 1087 in the Virgo Cluster based on Keck LRIS spectroscopy and archival Hubble Space Telescope Advanced Camera for Surveys imaging.
M. Beasley, J. Strader, J. Brodie, A. Cenarro, M. Geha   +4 more
semanticscholar   +1 more source

Mimicking Symmetry‐Breaking Einstein Ring by Optical Lens

Advanced Photonics Research, Volume 6, Issue 6, June 2025.
This article uses an optical lens to emulate the gravitational lensing effect and observe the Einstein ring (ER) patterns. The symmetry‐breaking ER, i.e., Einstein cross, is observed utilizing a rotation‐symmetry‐breaking hemi‐ellipsoid lens. Deformed Einstein cross patterns induced by noncollinearly alignment of the light source–lens–observer are ...
Jun‐Liang Duan, Wen Xiao, Minyong Guo, Tong Liu, Huanyang Chen, Jin‐Hui Chen   +5 more
wiley   +1 more source

Causal Discovery in Astrophysics: Unraveling Supermassive Black Hole and Galaxy Coevolution

The Astrophysical Journal
Correlation does not imply causation, but patterns of statistical association between variables can be exploited to infer a causal structure (even with purely observational data) with the burgeoning field of causal discovery.
Zehao Jin, Mario Pasquato, Benjamin L. Davis, Tristan Deleu, Yu Luo, Changhyun Cho, Pablo Lemos, Laurence Perreault-Levasseur, Yoshua Bengio, Xi Kang, Andrea Valerio Macciò, Yashar Hezaveh   +11 more
doaj   +1 more source

Abundance Patterns in the Interstellar Medium of the S0 Galaxy NGC 1316 (Fornax A) Revealed with Suzaku

, 2010
The Suzaku X-ray satellite observed the nearby S0 galaxy NGC 1316, a merger remnant aged 3 Gyr. The total good exposure time was 48.7 ksec. The spectra were well represented by a two-temperature thermal model for the interstellar medium (ISM) plus a ...
Konami, Saori, Makishima, Kazuo, Matsushita, Kyoko, Nagino, Ryo, Tamagawa, Toru, Tashiro, Makoto S.   +5 more
core   +1 more source

Structural properties of dwarf ellipticals and the connection with (ordinary) elliptical galaxies [PDF]

Proceedings of the International Astronomical Union, 2005
This article reviews the popular reasons for the belief that dwarf elliptical galaxies and (ordinary) elliptical galaxies are distinct and separate species. They include: light-profile shape (or similarly image concentration); the magnitude-central surface brightness diagram; the magnitude-effective surface brightness diagram (or similarly the ...
openaire   +3 more sources

X-ray Emission from the Interstellar and Circumgalactic Medium of Elliptical Galaxies based on MACER simulations [PDF]

, 2022
Aditi Vijayan, Bocheng Zhu, Miao Li, Feng Yuan, Luis C. Ho   +4 more
openalex   +1 more source

JWST NIRCam Observations of the Globular Cluster Population of RXJ 2129.7+0005

The Astrophysical Journal
We present an analysis of the globular cluster (GC) population in the galaxy cluster RXJ 2129.7+0005 ( z = 0.234) based on JWST NIRCam imaging in three filters: F115W, F150W, and F200W.
Kaitlyn E. Keatley, William E. Harris
doaj   +1 more source

Star Formation Histories of Dwarf Spheroidal and Dwarf Elliptical Galaxies in the Local Universe [PDF]

, 2023
Mi-Ra Seo, H. B. Ann
openalex   +1 more source