Results 51 to 60 of about 195,277 (271)

Mind the Gap: Tightening the Mass-Richness Relation with Magnitude Gaps [PDF]

, 2013
We investigate the potential to improve optical tracers of cluster mass by exploiting measurements of the magnitude gap, m12, defined as the difference between the r-band absolute magnitude of the two brightest cluster members.
Abazajian, Allen, Andreas A. Berlind, Andrew P. Hearin, Andrew R. Zentner, Becker, Behroozi, Berlind, Blanton, Conroy, D'Onghia, Gladders, Hearin, Jeffrey A. Newman, Jones, Klypin, Koester, Kravtsov, Newman, Paranjape, Proctor, Reyes, Riebe, Rozo, Rozo, Rykoff, Skibba, Tinker, Trujillo-Gomez, Watson, Weinberg, Wu, Yang, Zentner   +33 more
core   +1 more source

The Orientation of Galaxies in Nearby Galaxy Groups [PDF]

Symposium - International Astronomical Union, 2004
The statistical analysis of six nearby groups of galaxies, connected with the Milky Way, M31, M81, M101, NGC5128 and NGC5236 shows an isotropic distribution of galaxy planes, similarly to galaxies within the Local Group. Also planes of galaxies in the nearby (Vr < 500 km s−1) region of the Local Supercluster exhibit random distribution, disregarding
P. Flin, M. Biernacka, J. Krywult
openaire   +1 more source

Identification of Compact Groups of Galaxies in IllustrisTNG300

The Astrophysical Journal
We identify compact groups (CGs) of galaxies in an IllustrisTNG300 simulation using a friends-of-friends algorithm. Our approach is designed to be comparable to systematic CG searches based on spectroscopic surveys, while avoiding the conventional ...
Seungwu Yoo, Jubee Sohn
doaj   +1 more source

Groups of Galaxies [PDF]

Highlights of Astronomy, 1977
I would like to report on some work that Ed Turner and I have done on groups of galaxies and how groups may be used to obtain useful cosmological information. Of course the classic study of groups of galaxies was done by de Vaucouleurs (1975) who made a catalogue of groups and loose associations of galaxies in the local supercluster. Partly to obtain a
openaire   +1 more source

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source

HCG 57: Evidence for Shock-heated Intergalactic Gas from X-Rays and Optical Emission Line Spectroscopy

The Astrophysical Journal
We present Chandra and XMM-Newton X-ray observations of the compact group HCG 57, and optical integral field spectroscopy of the interacting galaxy pair HCG 57A/D.
Ewan O’Sullivan, P. N. Appleton, B. A. Joshi, Lauranne Lanz, Katherine Alatalo, Jan M. Vrtilek, Andreas Zezas, Laurence P. David   +7 more
doaj   +1 more source

The mass distribution of a moderate redshift galaxy group and brightest group galaxy from gravitational lensing and kinematics [PDF]

, 2010
The gravitational lens system CLASS B2108+213 has two radio-loud lensed images separated by 4.56 arcsec. The relatively large image separation implies that the lensing is caused by a group of galaxies. In this paper, new optical imaging and spectroscopic
A. More, Abell, Auger, Auger, Barnabè, Beers, Bernardi, Bertin, Blumenthal, Bradač, Bradač, Bradač, Browne, Bullock, C. D. Fassnacht, Chae, Clowe, Cohn, Czoske, D. D. Kocevski, Dalal, Diemand, Dobke, Donato, Ebeling, Eke, Ettori, Faber, Fassnacht, Fassnacht, Fassnacht, Faure, Gao, Gavazzi, Gavazzi, Gavazzi, Gentile, Gnedin, Halkola, Hoekstra, J. P. McKean, Jeltema, Jiang, Keeton, Keeton, Kneib, Kocevski, Kochanek, Koopmans, Koopmans, Koopmans, Krist, Kubo, L. V. E. Koopmans, Lewis, Limousin, Limousin, M. W. Auger, Macciò, MacLeod, Mandelbaum, Marchã, Matthews, McKean, McKean, McKean, Metcalf, Mittal, Momcheva, Moore, Moore, More, More, Morgan, Myers, Natarajan, Navarro, Navarro, O. Czoske, Oguri, Oguri, Oke, Oke, Parker, Peng, Rusin, S. Vegetti, Saha, Salucci, Sand, Sand, Sand, Sand, Sharon, Sheth, Smith, Suyu, Suyu, Swaters, T. Treu, Tonry, Tonry, Tonry, Treu, Treu, Treu, Vegetti, Vegetti, Warren, Williams, Willis, Wilman, Winn, Wucknitz, Yang, Zabludoff   +115 more
core   +5 more sources

Hot Gas in Groups and Their Galaxies [PDF]

Symposium - International Astronomical Union, 1998
It is clear that there is an important interplay between galaxies and the group environment. At the velocity dispersions (~ 100 km s−1) characteristic of groups, the galaxies interact strongly, leading to triggering of star formation, and galaxy merging.
Trevor J. Ponman, Alexis Finoguenov
openaire   +1 more source

Microfluidic Engineering of Chitosan‐Coated Nanoemulsions for Controlled Release and Stability in Space Pharmaceutics

Advanced Materials Technologies, EarlyView.
Microfluidic engineering enables the fabrication of chitosan‐coated, melatonin‐loaded nanoemulsions with controlled release and enhanced physicochemical stability for space pharmaceutics. Interfacial biopolymer coating modulates droplet behavior under accelerated thermal stress and simulated microgravity.
Modupe Adebowale, Nguyen Van Duc Long, Philip M Williams, Volker Hessel   +3 more
wiley   +1 more source

Detection of a Spatially Extended Stellar Population in M33: A Shallow Stellar Halo?

The Astrophysical Journal
We analyze the outer regions of M33, beyond 15 kpc in projected distance from its center, using Subaru/Hyper Suprime-Cam multicolor imaging. We identify red giant branch (RGB) stars and red clump (RC) stars using the surface-gravity-sensitive NB515 ...
Itsuki Ogami, Yutaka Komiyama, Masashi Chiba, Mikito Tanaka, Puragra Guhathakurta, Evan N. Kirby, Rosemary F. G. Wyse, Carrie Filion, Takanobu Kirihara, Miho N. Ishigaki, Kohei Hayashi   +10 more
doaj   +1 more source