Results 91 to 100 of about 6,495 (171)

Understanding the Fundamental Plane and the Tully Fisher Relation

Frontiers in Astronomy and Space Sciences, 2020
The relation between early type galaxy size, surface brightness and velocity dispersion, “the fundamental plane,” has long been understood as resulting from equilibrium in their largely pressure supported stellar dynamics.
Jeremy Mould
doaj   +1 more source

The Bulge-Halo Connection in Galaxies: A Physical Interpretation of the Vcirc-sigma_0 Relation

, 2006
We explore the dependence of the ratio of a galaxy's circular velocity, Vcirc, to its central velocity dispersion, sigma_0, on morphology, or equivalently total light concentration. Such a dependence is expected if light traces the mass.
Cappellari M., Jon Holtzman, Lawrence M. Widrow, Michael McDonald, Stéphane Courteau, Tully R. B.   +5 more
core   +1 more source

Driver behind the bimodal distribution of Eddington-scaled radio luminosity in nearby early-type galaxies

Astronomy & Astrophysics
Context. Early-type galaxies host low-luminosity active galactic nuclei, as indicated by radio emission spanning up to several orders of magnitude in terms of the physical scale, ranging from compact parsec-scale to extended kiloparsec-scale radio ...
Wójtowicz A., Werner N., Stawarz Ł., Cheung C. C.   +3 more
doaj   +1 more source

A Photometric Study of Giant Ellipticals and Their Stellar Halos With VST

Galaxies, 2017
Observations of diffuse starlight in the outskirts of galaxies are thought to be a fundamental source of constraints on the cosmological context of galaxy assembly in the Λ CDM model.
Marilena Spavone, Massimo Capaccioli, Nicola R. Napolitano, Enrichetta Iodice, Aniello Grado, Luca Limatola, Andrew P. Cooper, Michele Cantiello, Duncan A. Forbes, Maurizio Paolillo, Pietro Schipani   +10 more
doaj   +1 more source

The GALEX Ultraviolet Atlas of Nearby Galaxies [PDF]

, 2007
We present images, integrated photometry, and surface-brightness and color profiles for a total of 1034 nearby galaxies recently observed by the Galaxy Evolution Explorer (GALEX) satellite in its far-ultraviolet (FUV; λ_(eff) = 1516 Å) and near ...
Barlow, Tom A., Bianchi, Luciana, Boissier, Samuel, Boselli, Alessandro, Conrow, Tim, Donas, José, Forster, Karl, Friedman, Peter G., Gil de Paz, Armando, Heckman, Timothy M., Joe, Young H., Lee, Young-Wook, Madore, Barry F., Martin, D. Christopher, Milliard, Bruno, Morrissey, Patrick, Neff, Susan G., Rey, Soo-Chang, Rich, R. Michael, Schiminovich, David, Seibert, Mark, Small, Todd, Szalay, Alex S., Thilker, David, Wyder, Ted K., Yi, Sukyoung   +25 more
core  

Stars throw their weight in old galaxies

, 2012
The observation that old, massive galaxies have a larger fraction of low-mass stars than their younger, lower-mass counterparts adds to mounting evidence that star formation may have been different in the early Universe.Comment: Invited Nature "News and ...
Bastian, Nate
core   +1 more source

Probing the effect of the protocluster environment on galaxy morphology at z = 2.23

Astronomy & Astrophysics
Context. As galaxies evolve in dense cluster and protocluster environments, they interact and quench their star formation. This gradually transforms the dominant galaxy population from star-forming galaxies to quiescent red galaxies.
Golden-Marx E., Cai Z., Shi D., Wang X., Lemaux B. C., Vulcani B., Häußler B., Renard P., Shen L., Giddings F.   +9 more
doaj   +1 more source

The Extended Baryonic Halo of NGC 3923

Galaxies, 2017
Galaxy halos and their globular cluster systems build up over time by the accretion of small satellites. We can learn about this process in detail by observing systems with ongoing accretion events and comparing the data with simulations.
Bryan W. Miller, Tomás Ahumada, Thomas H. Puzia, Graeme N. Candlish, Stacy S. McGaugh, J. Christopher Mihos, Robyn E. Sanderson, Mischa Schirmer, Rory Smith, Matthew A. Taylor   +9 more
doaj   +1 more source

The Cool ISM in S0 Galaxies. I. A Survey of Molecular Gas

, 2002
Lenticular galaxies remain remarkably mysterious as a class. Observations to date have not led to any broad consensus about their origins, properties and evolution, though they are often thought to have formed in one big burst of star formation early in ...
Appleton P. N., Arimoto N., Baugh C. M., Bekki K., Bekki K., Bieging J. H., Biermann P., Bottinelli L., Bower R. G., Buson L. M., Capaccioli M., Chamaraux P., Gary A. Welch, Gerin M., Huchtmeier W. K., Kauffmann G., Knapp G. R., Larson R. B., Leslie J. Sage, Madau P., Mihos J. C., Richter O.-G., Rocca-Volmerange B., Sage L. J., Sage L. J., Sage L. J., Sage L. J., Sancisi R., Shostak G. S., Tacconi L. J., van der Burg G., van Driel W., Veron-Cetty M.-P., White S. D. M., Wiklind T., Wiklind T., Wiklind T., Wiklind T.   +37 more
core   +2 more sources

Velocity dispersion functions of pressure-supported galaxies in EAGLE simulations with varying active galactic nucleus feedback

Astronomy & Astrophysics
We investigated the stellar velocity dispersion functions (VDFs) of pressure-supported galaxies in the EAGLE cosmological simulations. The central stellar velocity dispersion is one of the fundamental dynamical tracers of the total mass of galaxy ...
Choi Jungwon, Sohn Jubee
doaj   +1 more source