Results 101 to 110 of about 4,131 (126)

Searching for a candidate compact elliptical galaxy with SOAR/SOI

, 2011
Compact elliptical (cE) and ultra compact dwarf (UCD) galaxies are extremely rare objects in our Universe that populate a puzzling gap in the continuum of normal elliptical galaxy morphology.
Claire Merriman Davy
core  

Discovery of an isolated compact elliptical galaxy in the field

, 2013
We present the discovery of an isolated compact elliptical (cE) galaxy, found during a search of SDSS DR7 for cE galaxies, and for which we obtained William Herschel Telescope/ACAM imaging. It is similar to 900 kpc distant from its nearest neighbour, has
Phillipps, S., Price, J., Huxor, A. P.
core   +1 more source

Core Formation by Binary Scouring and Gravitational Wave Recoil in Massive Elliptical Galaxies

The Astrophysical Journal
Scouring by supermassive black hole (SMBH) binaries is the most accepted mechanism for the formation of the cores seen in giant elliptical galaxies. However, an additional mechanism is required to explain the largest observed cores.
Nader Khonji, Alessia Gualandris, Justin I. Read, Walter Dehnen   +3 more
doaj   +1 more source

Where Have All the Little Red Dots Gone? Supermassive Black Hole Binary Dynamics and Its Impact on Galaxy Properties

The Astrophysical Journal Letters
Recent James Webb Space Telescope observations have revealed a peculiar class of galaxies at redshifts z  ≳ 6, characterized by extremely high central stellar densities and overmassive central supermassive black holes (SMBHs), “little red dots” (LRDs). A
Fazeel Mahmood Khan, Benjamin L. Davis, Andrea Valerio Macciò, Kelly Holley-Bockelmann   +3 more
doaj   +1 more source

Astrophysical Journal, submitted Low Mass X-ray Binaries Versus Globular Cluster Age in the

, 2008
Recently, Puzia et al. found that the Virgo elliptical galaxy NGC 4365 contains two systems of globular clusters (GCs): an old population (14 Gyr) and an intermediate-age population (3.5 Gyr).
Elliptical Galaxy Ngc, Gregory R. Sivako, Craig L. Sarazin, Lorella Angelini   +3 more
core  

JWSTs PEARLS: NIRCam imaging and NIRISS spectroscopy of a $z=3.6$ star-forming galaxy lensed into a near-Einstein Ring by a $z=1.258$ massive elliptical galaxy

We present the discovery, and initial lensing analysis, of a high-redshift galaxy-galaxy lensing system within the JWST-PEARLS/HST-TREASUREHUNT North Ecliptic Pole Time Domain Field (designated NEPJ172238.9+655143.1). The lensing geometry shears a $z=3.6\
Li, Qiong; id_orcid, Yan, Haojing, Wyithe, J. Stuart B., Grogin, Norman A., Windhorst, Rogier A., Saikia, Payaswini, Maksym, W. Peter, Pirzkal, Nor, Cohen, Seth H., Driver, Simon P., Kamieneski, Patrick S., Coe, Dan, Koekemoer, Anton M., Jansen, Rolf A., Summers, Jake, Marshall, Madeline A., Holwerda, Benne W., Estrada-Carpenter, Vicente, O'Brein, Roselia, Austin, Duncan; id_orcid, Rusakov, Vadim; id_orcid, Goolsby, Caio M., Willmer, Christopher N. A., Harvey, Thomas; id_orcid, Hathi, Nimish P., Adams, Nathan J.; id_orcid, Ryan, Russell E., Frye, Brenda, Westcott, Lewi, Ferrami, Giovanni, Gelfand, Joseph D., Broadhurst, Tom, Conselice, Christopher J.   +32 more
core   +1 more source

Statistical methods in weak gravitational lensing

, 2015
This thesis studies several topics in the area of weak gravitational lensing and addresses some key statistical problems within this subject. A large part of the thesis concerns the measurement of galaxy shapes for weak gravitational lensing and the ...
Kacprzak, T
core  

Searching for a candidate compact elliptical galaxy with SOAR/SOI

Compact elliptical (cE) and ultra compact dwarf (UCD) galaxies are extremely rare\ud objects in our Universe that populate a puzzling gap in the continuum of normal elliptical\ud galaxy morphology.
Davy, Claire Merriman
core  

Origin and Evolution of Large-scale Magnetic Fields

, 2015
Magnetic elds are ubiquitous at all scales in the Universe and have been observed in galaxies and clusters of galaxies via observations of di use radio emission and Faraday Rotation Measures.
Barnes, DJ
core  

Extreme isolated elliptical galaxies

, 2002
This dissertation presents the results of a detailed search for and the photometric and spectroscopic analysis of nine elliptical galaxies isolated from nearest neighbors of M V < ?16.5 by distances in excess of 2.5 megaparsec.
Aars, Christian E.
core