Results 11 to 20 of about 18,742 (219)

Tertiary mirror location diversity on very large etendue telescope architectures [PDF]

EPJ Web of Conferences
Two distinct reflective telescope designs utilizing a variation of three-mirror anastigmat configuration were investigated. We demonstrate how the strategic placement of the tertiary mirror significantly influences the telescope's form factor, enabling ...
Kim Daewook, Cho Hyejeon
doaj   +1 more source

Galaxy evolution in protoclusters [PDF]

Monthly Notices of the Royal Astronomical Society, 2017
14 pages, 9 figures, accepted for publication in ...
Stuart I. Muldrew, Nina A. Hatch, Elizabeth A. Cooke   +2 more
openaire   +4 more sources

Evolution of galaxies in clusters

The Astrophysical Journal, 1994
33 pages, normal ...
Charlot, S., Silk, J.
openaire   +2 more sources

Formation of a Massive Lenticular Galaxy Under the Tidal Interaction with a Group of Dwarf Galaxies

The Astrophysical Journal Letters, 2023
Based on the atomic-hydrogen (H i ) observations using the Five-hundred-meter Aperture Spherical radio Telescope, we present a detailed study of the gas-rich massive S0 galaxy NGC 1023 in a nearby galaxy group.
Jin-Long Xu, Ming Zhu, Kelley M. Hess, Naiping Yu, Chuan-Peng Zhang, Xiao-Lan Liu, Mei Ai, Peng Jiang, Jie Wang   +8 more
doaj   +1 more source

Evolution of galaxy clustering [PDF]

Monthly Notices of the Royal Astronomical Society, 1998
Four pages, 1 figure.
openaire   +2 more sources

The Morphological Evolution of Galaxies

Science, 2001
Many galaxies have taken on their familiar appearance relatively recently. In the distant Universe, galaxy morphology deviates significantly (and systematically) from that of nearby galaxies at redshifts (z) as low as 0.3. This corresponds to a time ∼3.5 × 109years in the past, which is only ∼25% of the present age of the Universe.
Abraham, Roberto G., Bergh, Sidney van den   +1 more
openaire   +3 more sources

The Evolution of Galaxy Groups and of Galaxies Therein [PDF]

, 2007
Properties of groups of galaxies depend sensitively on the algorithm for group selection, and even the most recent catalogs of groups built from redshift-space selection should suffer from projections and infalling galaxies. The cosmo-dynamical evolution of groups from initial Hubble expansion to collapse and virialization leads to a fundamental track (
openaire   +3 more sources

The Chemical Evolution of the Galaxy [PDF]

Symposium - International Astronomical Union, 1985
Over the last few years, our picture of the chemical evolution of the Galaxy has changed substantially. These changes are of interest because chemical evolution provides a common point of contact for most astrophysical processes of importance to galaxy evolution.
openaire   +1 more source

JWST Reveals a Population of Ultrared, Flattened Galaxies at 2 ≲ z ≲ 6 Previously Missed by HST

The Astrophysical Journal Letters, 2023
With just a month of data, JWST is already transforming our view of the universe, revealing and resolving starlight in unprecedented populations of galaxies.
Erica J. Nelson, Katherine A. Suess, Rachel Bezanson, Sedona H. Price, Pieter van Dokkum, Joel Leja, Bingjie Wang, Katherine E. Whitaker, Ivo Labbé, Laia Barrufet, Gabriel Brammer, Daniel J. Eisenstein, Justus Gibson, Abigail I. Hartley, Benjamin D. Johnson, Kasper E. Heintz, Elijah Mathews, Tim B. Miller, Pascal A. Oesch, Lester Sandles, David J. Setton, Joshua S. Speagle, Sandro Tacchella, Ken-ichi Tadaki, Hannah Übler, John. R. Weaver   +25 more
doaj   +1 more source

Comparison of the Chemical Compositions between the Bright and Faint Red Clumps for the Metal-poor and Metal-rich Populations in the Milky Way Bulge

The Astrophysical Journal
We examined the double red clump (RC) observed in the Galactic bulge, interpreted as a difference in distance (“X-shaped bulge scenario”) or in chemical composition (“multiple population scenario”).
Seungsoo Hong, Dongwook Lim, Young-Wook Lee   +2 more
doaj   +1 more source