Results 31 to 40 of about 80,963 (169)

Forming Young Bulges within Existing Disks: Statistical Evidence for External Drivers

, 2003
Contrary to traditional models of galaxy formation, recent observations suggest that some bulges form within preexisting disk galaxies. Such late-epoch bulge formation within disks seems to be linked to disk gas inflow and central star formation, caused ...
Abraham R. G., Andredakis Y. C., Becker R. H., Elizabeth J. Barton, Ellis R. S., Friedli D., Kauffmann G., Rolf A. Jansen, Schwarzkopf U., Sheila J. Kannappan, Shioya Y., Tully R. B.   +11 more
core   +1 more source

Estimating the Dark Halo Mass from the Relative Thickness of Stellar Disks [PDF]

, 2006
We analyze the relationship between the mass of a spherical component and the minimum possible thickness of stable stellar disks. This relationship for real galaxies allows the lower limit on the dark halo mass to be estimated (the thinner the stable ...
A. Toomre, A. Toomre, A. V. Khoperskov, A. V. Khoperskov, A. V. Khoperskov, A. V. Zasov, A. V. Zasov, A. V. Zasov, D. Merritt, D. Pfenniger, E. A. Mikhaĭlova, E. Athanassoula, F. Combes, F. Combes, J. A. Sellwood, J. A. Sellwood, J. Barnes, J. Dubinski, J. N. Bahcall, J. Navarro, L. Hernquist, L. Spitzer, M. Kregel, N. Ya. Sotnikova, N. Ya. Sotnikova, N. Ya. Sotnikova, N. Ya. Sotnikova, P. A. Patsis, P. C. Kruit van der, P. J. Teuben, R. Bottema, R. M. Kulsrud, S. A. Rodionov, S. A. Rodionov, S. S. McGaugh, T. S. Albada van, V. L. Polyachenko   +36 more
core   +2 more sources

Repeating Nuclear Transients From Repeating Partial Tidal Disruption Events

Astronomische Nachrichten, EarlyView.
ABSTRACT Extragalactic nuclear transients that exhibit repeating outbursts can be modeled as the repeated dynamical interaction between bound stars and supermassive black holes (SMBHs). A subset of these transients, with recurrence timescales of months‐to‐years, have been explained as accretion flares from the repeated tidal stripping of a star by an ...
Ananya Bandopadhyay, Eric R. Coughlin, Julia Fancher, C. J. Nixon, Dheeraj R. Pasham   +4 more
wiley   +1 more source

The Thickness of Galaxy Disks from z = 5 to 0 Probed by JWST

The Astrophysical Journal Letters
Although a thick disk is a structure prevalent in local disk galaxies and also present in our home Galaxy, its formation and evolution are still unclear.
Jianhui Lian, Li Luo
doaj   +1 more source

JWST Insight into a Lensed HST-dark Galaxy and Its Quiescent Companion at z = 2.58

The Astrophysical Journal Letters, 2023
Using the novel James Webb Space Telescope (JWST)/NIRCam observations in the A2744 field, we present a first spatially resolved overview of a Hubble Space Telescope (HST)-dark galaxy, spectroscopically confirmed at z = 2.58 with magnification μ ≈ 1.9 ...
Vasily Kokorev, Shuowen Jin, Georgios E. Magdis, Karina I. Caputi, Francesco Valentino, Pratika Dayal, Maxime Trebitsch, Gabriel Brammer, Seiji Fujimoto, Franz Bauer, Edoardo Iani, Kotaro Kohno, David Blánquez Sesé, Carlos Gómez-Guijarro, Pierluigi Rinaldi, Rafael Navarro-Carrera   +15 more
doaj   +1 more source

Quantifying the Impact of Relativistic Precession on Tidal Disruption Event Light Curves

Astronomische Nachrichten, EarlyView.
ABSTRACT The tidal field of a black hole can turn a star into a gas stream whose orbit can precess, especially if the a black hole is rapidly spinning. In this work, we investigate the impact of precession on the light curves of tidal disruption events (TDE).
Diego Calderón, Ondřej Pejcha, Brian D. Metzger, Paul C. Duffell, Stephan Rosswog   +4 more
wiley   +1 more source

Understanding Degradation Mechanisms in Water‐In‐Salt Electrolyte. Part 2: Impact of the Electrochemical Parameters on the Cycling Behavior of LiFePO4 versus TiS2

Batteries &Supercaps, EarlyView.
Cycling water‐in‐salt batteries involves complex degradation processes that require multiprobe analysis. Using online electrochemical mass spectrometry (OEMS), postmortem X‐ray photoemission spectroscopy (XPS) (including hard‐XPS), and scanning electron microscopy (SEM), the degradation mechanisms are examined in composite electrodes (TiS2 and LiFePO4)
Célia Doublet, Théo Faverge, Vincent Martin, Hiram Castillo Michel, Jean‐Pascal Rueff, Marian Chatenet, Lauréline Lecarme, Claire Villevieille   +7 more
wiley   +1 more source

Red Fraction Among Satellite Galaxies with Disk-like Light Profiles: Evidence for Inflow in the H I Disk [PDF]

, 2010
The relationships between color, characterized with respect to the g – r red sequence; stellar structure, as determined using the i-band Sérsic index; and group membership are explored using the Sloan Digital Sky Survey (SDSS).
Hester, J. A.
core  

Compact Quiescent Galaxies at Intermediate Redshifts

, 2014
From several searches of the area common to the Sloan Digital Sky Survey and the United Kingdom Infrared Telescope Infrared Deep Sky Survey, we have selected 22 luminous galaxies between $z \sim$ 0.4 and $z \sim$ 0.9 that have colors and sizes similar to
Hsu, Li-Yen, Shih, Hsin-Yi, Stockton, Alan   +2 more
core   +1 more source

Subterranean environments contribute to three‐quarters of classified ecosystem services

Biological Reviews, EarlyView.
ABSTRACT Beneath the Earth's surface lies a network of interconnected caves, voids, and systems of fissures forming in rocks of sedimentary, igneous, or metamorphic origin. Although largely inaccessible to humans, this hidden realm supports and regulates services critical to ecological health and human well‐being.
Stefano Mammola, David Brankovits, Tiziana Di Lorenzo, Isabel R. Amorim, Raluca Ioana Bancila, Adrià Bellvert, Enrico Bernard, Anna Blomberg, Paulo A.V. Borges, Martina Cappelletti, Rodrigo Lopes Ferreira, Rosalina Gabriel, Diana M. P. Galassi, Laura Garzoli, Vasilis Gerovasileiou, Grant C. Hose, Kathryn L. Korbel, Simone Martino, Ana Z Miller, Nataša Mori, Veronica Nanni, Giuseppe Nicolosi, Mattia Saccò, Troy S. Sakihara, Marconi Souza Silva, Anne E. Tamalavage, Maja Zagmajster, Efraín Chávez, Christian Griebler, Pedro Cardoso, Alejandro Martínez   +30 more
wiley   +1 more source