Results 71 to 80 of about 500,059 (233)

CONFIRMATION OF ENHANCED DWARF-SENSITIVE ABSORPTION FEATURES IN THE SPECTRA OF MASSIVE ELLIPTICAL GALAXIES: FURTHER EVIDENCE FOR A NON-UNIVERSAL INITIAL MASS FUNCTION [PDF]

, 2011
We recently found that massive cluster elliptical galaxies have strong Na i λ8183, 8195 and FeH λ9916 Wing–Ford band absorption, indicating the presence of a very large population of stars with masses ≲ 0.3 M☉.
P. V. van Dokkum, C. Conroy
semanticscholar   +1 more source

A substantial population of low-mass stars in luminous elliptical galaxies [PDF]

Nature, 2010
The stellar initial mass function (IMF) describes the mass distribution of stars at the time of their formation and is of fundamental importance for many areas of astrophysics.
P. V. Dokkum, C. Conroy
semanticscholar   +1 more source

Solvent‐Guided Chiral Assemblies and Chemical Doping of OEG‐Functionalized Conjugated Polymers

Advanced Materials, Volume 38, Issue 45, 13 August 2026.
Solvent‐dependent aggregation pathways dictate whether conjugated polymers form chiral lyotropic liquid‐crystalline assemblies or achiral packed aggregates. Mapping solvent‐controlled β₁ and β2 states reveals that weaker backbone association favors β₁ aggregates and reorganizable twisted mesophases, whereas stronger backbone association favors β2 ...
Sanghyun Jeon, Justin Scott Neu, Nahyun Ahn, Ayse Senlik, Yen‐Chi Chen, Pravini S. Fernando, Priyotosh Bairagya, Chetan Kumar Prasad, Janice Mihyun Baek, Wei You, Ying Diao   +10 more
wiley   +1 more source

UV Visibility of Moderate-Redshift Giant Elliptical Galaxies [PDF]

Journal of Astronomy and Space Sciences, 1998
We show quantitatively whether giant elliptical galaxies would be visible at far UV wavelengths if they were placed at moderate redshift of 0.4-0.5. On the basis of simple cosmological tests, we conclude that giant elliptical galaxies can be detectable ...
Myung-Hyun Rhee, Young-Wook Lee, Yong-Ik Byun, Young-Jong Sohn   +3 more
doaj  

AGN Feedback in Elliptical Galaxies: Numerical Simulations [PDF]

, 2011
The importance of feedback (radiative and mechanical) from massive black holes at the centers of elliptical galaxies is not in doubt, given the well established relation among black hole mass and galaxy optical luminosity.
L. Ciotti, J. Ostriker, J. Ostriker
semanticscholar   +1 more source

The ORCA‐TWIN qCMOS Experiment I. Science Case and Commissioning at Calar Alto Observatory

Astronomische Nachrichten, Volume 347, Issue 7, August 2026.
ABSTRACT We describe a pilot study to explore a new generation of fast and low noise CMOS image sensors for time domain astronomy, using two remote telescopes with a baseline of 1635 km. The experiment involves direct imaging with novel qCMOS image sensor technology that combines fast readout with sub‐electron readout noise.
Martin M. Roth, Paško Roje, Stella Vješnica, Stefan Cikota, Alex J. Brown, Mike Kretlow, Marco Azzaro, Santiago Reinhart, Jesús Aceituno, Harry Dawson, Carsten Denker, Torsten Enßlin, Stephan Geier, Thomas Granzer, Thomas Kupfer, Gianluca Li Causi, Samaya Nissanke, José Luis Ortiz, Fernando Pedichini, Katja Poppenhäger, Axel Schwope   +20 more
wiley   +1 more source

Dark Matter in Elliptical Galaxies [PDF]

, 2011
We review X-ray constraints on dark matter in giant elliptical galaxies \(({10}^{12}\,{M}_{\odot }\lesssim{M}_{vir} \lesssim1{0}^{13}\,{M}_{\odot })\)obtained using the current generation of X-ray satellites, beginning with an overview of the physics of ...
D. Buote, P. Humphrey
semanticscholar   +1 more source

Statistical Survey of Cosmic Noise Absorption in Conjunction With Plasma Wave Measurements

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Using a decade of observations from the Canadian Geospace Observatory Riometer Network (GO‐RIO), we selected an east‐west subset of stations near L∼7 $L\sim 7$ to classify cosmic noise absorption (CNA) (a proxy for enhanced D‐region ionization) into two morphologies, simultaneous and drifting, based on the relative timing of signals across the
R. Ghaffari, C. M. Cully, E. Spanswick, R. A. D. Fiori   +3 more
wiley   +1 more source

On the Formation of Elliptical Galaxies

, 1994
It is shown that the violent relaxation of dissipationless stellar systems leads to universal de Vaucouleurs profiles only outside 1.5 effective radii $R_e$. Inside $1.5 R_e$ the surface density profiles depend strongly on the initial conditions and are in general not in agreement with the de Vaucouleurs law.
openaire   +3 more sources

The Stellar Kinematics of Elliptical Galaxies [PDF]

Symposium - International Astronomical Union, 1987
The kinematic properties of elliptical galaxies are summarized. New developments are discussed in four areas: (i) the Faber-Jackson relation and the role of second parameters (ii) the luminosity-rotation relation (iii) the figures of elliptical galaxies and (iv) the mass-to-light ratio as a function of radius.
openaire   +2 more sources