Results 101 to 110 of about 3,281,924 (185)

Unsupervised feature-learning for galaxy SEDs with denoising autoencoders

, 2017
With the increasing number of deep multi-wavelength galaxy surveys, the spectral energy distribution (SED) of galaxies has become an invaluable tool for studying the formation of their structures and their evolution.
Bobin, Jerome, Floc'h, Emeric Le, Frontera-Pons, Joana, Sureau, Florent   +3 more
core   +1 more source

ZFOURGE/CANDELS: ON THE EVOLUTION OF M* GALAXY PROGENITORS FROM z = 3 TO 0.5 [PDF]

, 2014
Galaxies with stellar masses near M* contain the majority of stellar mass in the universe, and are therefore of special interest in the study of galaxy evolution. The Milky Way (MW) and Andromeda (M31) have present-day stellar masses near M*, at 5 × 1010 
C. Papovich, I. Labb'e, R. Quadri, V. Tilvi, P. Behroozi, E. Bell, K. Glazebrook, L. Spitler, C. Straatman, K. Tran, M. Cowley, R. Dav'e, A. Dekel, M. Dickinson, H. Ferguson, S. Finkelstein, E. Gawiser, H. Inami, S. Faber, G. Kacprzak, L. Kawinwanchakij, D. Kocevski, A. Koekemoer, D. Koo, P. Kurczynski, J. Lotz, Y. Lu, R. Lucas, D. McIntosh, N. Mehrtens, B. Mobasher, A. Monson, G. Morrison, T. Nanayakkara, S. Perrson, B. Salmon, R. Simons, A. Tomczak, P. V. Dokkum, B. Weiner, S. Willner, A. Texas, L. Observatory, Stsci, Michigan., Swinburne Univ., M. Univ., Aao, U. Cape, Saao, Hebrew Univ., Noao, Univ. of Texas-Austin, Rutgers, UCOLick Observatory, Kentucky., Stanford, Missouri-Kansas City, U. Riverside, C. Observatories, HawaiiCFHT, Johns Hopkins, Yale, A. Observatory, HarvardCfA   +64 more
semanticscholar   +1 more source

Modeling the Ages and Chemical Abundances of Elliptical Galaxies

The Astrophysical Journal
Spectroscopic studies of elliptical galaxies show that their stellar population ages, mean metallicity, and α enhancement traced by [Mg/Fe] all increase with galaxy stellar mass or velocity dispersion.
Nicole Marcelina Gountanis, David H. Weinberg, Aliza G. Beverage, Nathan R. Sandford, Charlie Conroy, Mariska Kriek   +5 more
doaj   +1 more source

Spatial Variations of Stellar Elemental Abundances in FIRE Simulations of Milky Way-mass Galaxies: Patterns Today Mostly Reflect Those at Formation

The Astrophysical Journal
Spatial patterns of stellar elemental abundances encode rich information about a galaxy’s formation history. We analyze the radial, vertical, and azimuthal variations of metals in stars, both today and at formation, in the FIRE-2 cosmological simulations
Russell L. Graf, Andrew Wetzel, Matthew A. Bellardini, Jeremy Bailin   +3 more
doaj   +1 more source

The evolution of the colour-magnitude relation and of the star formation activity in galaxy clusters since z~0.8

, 2008
We present recent results on the evolution of the colour-magnitude relation and of the star formation activity in galaxy clusters since z~0.8. Results are based on the ESO Distant Cluster Survey (EDisCS) - an ESO large programme aimed at the study of ...
De Lucia, Gabriella, Poggianti, Bianca M.   +1 more
core  

Pairwise dwarf galaxy formation and galaxy downsizing: some clues from extremely metal-poor Blue Compact Dwarf galaxies

, 2011
Some of the extremely metal-poor Blue Compact Dwarf galaxies (XBCDs) in the nearby universe form galaxy pairs with remarkably similar properties. This fact points to an intriguing degree of synchronicity in the formation history of these binary dwarf ...
H-H Loose, ID Karachentsev, KY Lo, P Papaderos, P Papaderos, P Papaderos, P Papaderos, P Papaderos, S Silich, SA Pustilnik, SA Pustilnik, V Icke, YI Izotov   +12 more
core   +1 more source

The Next Generation Deep Extragalactic Exploratory Public (NGDEEP) Survey

The Astrophysical Journal Letters
We present the Next Generation Deep Extragalactic Exploratory Public (NGDEEP) Survey, a deep slitless spectroscopic and imaging Cycle 1 JWST treasury survey designed to constrain feedback mechanisms in low-mass galaxies across cosmic time. NGDEEP targets
Micaela B. Bagley, Nor Pirzkal, Steven L. Finkelstein, Casey Papovich, Danielle A. Berg, Jennifer M. Lotz, Gene C. K. Leung, Henry C. Ferguson, Anton M. Koekemoer, Mark Dickinson, Jeyhan S. Kartaltepe, Dale D. Kocevski, Rachel S. Somerville, L. Y. Aaron Yung, Bren E. Backhaus, Caitlin M. Casey, Marco Castellano, Óscar A. Chávez Ortiz, Katherine Chworowsky, Isabella G. Cox, Romeel Davé, Kelcey Davis, Vicente Estrada-Carpenter, Adriano Fontana, Seiji Fujimoto, Jonathan P. Gardner, Mauro Giavalisco, Andrea Grazian, Norman A. Grogin, Nimish P. Hathi, Taylor A. Hutchison, Anne E. Jaskot, Intae Jung, Lisa J. Kewley, Allison Kirkpatrick, Rebecca L. Larson, Jasleen Matharu, Priyamvada Natarajan, Laura Pentericci, Pablo G. Pérez-González, Swara Ravindranath, Barry Rothberg, Russell Ryan, Lu Shen, Raymond C. Simons, Gregory F. Snyder, Jonathan R. Trump, Stephen M. Wilkins   +47 more
doaj   +1 more source

What Regulates Galaxy Evolution? Open Questions in Our Understanding of Galaxy Formation and Evolution

, 2014
In April 2013, a workshop entitled "What Regulates Galaxy Evolution" was held at the Lorentz Center. The aim of the workshop was to bring together the observational and theoretical community working on galaxy evolution, and to discuss in depth of the ...
De Lucia, Gabriella, Muzzin, Adam, Weinmann, Simone   +2 more
core   +1 more source

Exploring the Relationship between Stellar Mass, Metallicity, and Star Formation Rate at z ∼ 2.3 in KBSS-MOSFIRE

The Astrophysical Journal
The metal enrichment of a galaxy is determined by the cycle of baryons in outflows, inflows, and star formation. The relative contribution and timescale of each process sets the relationship between stellar mass, metallicity, and the star formation rate (
Nathalie A. Korhonen Cuestas, Allison L. Strom, Tim B. Miller, Charles C. Steidel, Ryan F. Trainor, Gwen C. Rudie, Evan Haze Nuñez   +6 more
doaj   +1 more source

A Perspective on the Milky Way Bulge Bar as Seen from the Neutron-capture Elements Cerium and Neodymium with APOGEE

The Astrophysical Journal
This study probes the chemical abundances of the neutron-capture elements cerium and neodymium in the inner Milky Way from an analysis of a sample of ∼2000 stars in the Galactic bulge bar spatially contained within ∣ X _Gal ∣ < 5 kpc, ∣ Y _Gal ∣ < 3.5 ...
J. V. Sales-Silva, K. Cunha, V. V. Smith, S. Daflon, D. Souto, R. Guerço, A. Queiroz, C. Chiappini, C. R. Hayes, T. Masseron, Sten Hasselquist, D. Horta, N. Prantzos, M. Zoccali, C. Allende Prieto, B. Barbuy, R. Beaton, D. Bizyaev, J. G. Fernández-Trincado, P. M. Frinchaboy, J. A. Holtzman, J. A. Johnson, Henrik Jönsson, S. R. Majewski, D. Minniti, D. L. Nidever, R. P. Schiavon, M. Schultheis, J. Sobeck, G. S. Stringfellow, G. Zasowski   +30 more
doaj   +1 more source