Results 81 to 90 of about 46,933 (305)

Mergers and galaxy evolution [PDF]

, 2007
Galaxy merging is the late time manifestation of the galaxy formation process and likely significantly effects z < 1 galaxies. A "maximum reasonable rate" model for merging finds a ,~ 2 mag K band increase in the luminosities of dwarf galaxies so that they contribute significantly to the faint counts, with spirals and ellipticals being far less ...
openaire   +2 more sources

Formation of a Spiral Galaxy in a Major Merger [PDF]

The Astrophysical Journal, 2005
submitted to ApJL, 4 ...
Springel, Volker, Hernquist, Lars
openaire   +4 more sources

AI in Neurology: Everything, Everywhere, all at Once PART 2: Speech, Sentience, Scruples, and Service

Annals of Neurology, EarlyView.
Artificial intelligence (AI) applications are finding use in real‐world neurological settings. Whereas part 1 of this 3‐part review series focused on the birth of AI and its foundational principles, this part 2 review shifts gears to explore more practical aspects of neurological care.
Matthew Rizzo
wiley   +1 more source

On the Use of Galaxy Catalogs in Gravitational-wave Parameter Estimation

The Astrophysical Journal
A major challenge in gravitational-wave (GW) multimessenger astrophysics is the imprecise localization of GW compact binary mergers. We investigate the use of a method to include galaxy catalog information in performing parameter estimation of these ...
Geoffrey Mo, Carl-Johan Haster, Erik Katsavounidis   +2 more
doaj   +1 more source

The Effect of Gas Fraction on the Morphology and Time-scales of Disc Galaxy Mergers [PDF]

, 2009
Gas-rich galaxy mergers are more easily identified by their disturbed morphologies than mergers with less gas. Because the typical gas fraction of galaxy mergers is expected to increase with redshift, the under-counting of low gas-fraction mergers may ...
Abazajian, Abraham, Barden, Barnes, Barnes, Bell, Bell, Bell, Bournaud, Bournaud, Boylan-Kolchin, Boylan-Kolchin, Brinchmann, Brown, Bundy, Bundy, Cassata, Conselice, Conselice, Conselice, Cox, Cox, Cox, Cox, Cox, Daddi, De Ravel, Di Matteo, Di Matteo, Erb, Erb, Faber, Hopkins, Hopkins, Hopkins, Jennifer M. Lotz, Joel R. Primack, Jogee, Johansson, Jonsson, Jonsson, Jonsson, Katz, Kennicutt, Khalatyan, Le Fèvre, Leitherer, Lin, Lin, Lopez-Sanjuan, Lotz, Lotz, Lotz, Lotz, Martig, Melbourne, Mihos, Naab, Naab, Noekse, Patrik Jonsson, Patton, Robertson, Robertson, Rocha, Shi, Sinha, Springel, Springel, Springel, T. J. Cox, Tacconi, Van Dokkum, Wetzstein   +73 more
core   +1 more source

Galaxy mergers and gravitational lens statistics [PDF]

The Astrophysical Journal, 1994
We investigate the impact of hierarchical galaxy merging on the statistics of gravitational lensing of distant sources. Since no definite theoretical predictions for the merging history of luminous galaxies exist, we adopt a parametrized prescription, which allows us to adjust the expected number of pieces comprising a typical present galaxy at z=0.65.
Hans-Walter Rix, Edwin L. Turner, Dan Maoz, Masataka Fukugita   +3 more
openaire   +4 more sources

New Arabic Records From Cairo on Supernovae 1181 and 1006

Astronomische Nachrichten, EarlyView.
ABSTRACT The remnant of the historical supernova SN 1181 is under discussion: While the previously suggested G130.7+3.1 (3C58) appears too old (3000–5000 year), the unusual star IRAS00500+6713 with a surrounding nebula (Pa‐30) has an expansion age not inconsistent with a SN Iax explosion in ad 1181 under the assumption that neither acceleration nor ...
J. G. Fischer, H. Halm, R. Neuhäuser, D. L. Neuhäuser   +3 more
wiley   +1 more source

Apparent Effect of Dust Extinction on the Observed Outflow Velocity of Ionized Gas in Galaxy Mergers

The Astrophysical Journal
In this study, we examine photoionization outflows during the late stages of galaxy mergers, with a specific focus on the relation between the observed velocity of outflowing gas and the apparent effects of dust extinction.
Naomichi Yutani, Yoshiki Toba, Keiichi Wada   +2 more
doaj   +1 more source

Origins of the Evil Eye: M64's Stellar Halo Reveals the Recent Accretion of an SMC-mass Satellite

The Astrophysical Journal Letters, 2023
M64, often called the “Evil Eye” galaxy, is unique among local galaxies. Beyond its dramatic, dusty nucleus, it also hosts an outer gas disk that counter-rotates relative to its stars.
Adam Smercina, Eric F. Bell, Paul A. Price, Jeremy Bailin, Julianne J. Dalcanton, Roelof S. de Jong, Richard D’Souza, Katya Gozman, In Sung Jang, Antonela Monachesi, David Nidever, Colin T. Slater   +11 more
doaj   +1 more source

Quantifying galaxy morphology [PDF]

, 2014
How do the different shapes of galaxies arise? Milena Pawlik describes work to identify the role of galaxy mergers and starbursts in galactic evolution.Publisher PDFPeer ...
Pawlik, Milena
core   +2 more sources