Results 11 to 20 of about 218,948 (171)

Galaxy masses [PDF]

, 2014
Galaxy masses play a fundamental role in our understanding of structure formation models. This review addresses the variety and reliability of mass estimators that pertain to stars, gas, and dark matter.
Courteau, Stephane, Cappellari, Michele, Hoekstra, Henk, Treu, Tommaso, Widrow, Lawrence M., Emsellem, Eric, Maraston, Claudia, Koopmans, L. V. E., Dutton, Aaron A., Mamon, Gary A., de Jong, Roelof S.   +10 more
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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

Photoevaporation and Close Encounters: How the Environment around Cygnus OB2 Affects the Evolution of Protoplanetary Disks

The Astrophysical Journal Supplement Series, 2023
In our Galaxy, star formation occurs in a variety of environments, with a large fraction of stars formed in clusters hosting massive stars. OB stars have an important feedback on the evolution of protoplanetary disks orbiting around nearby young stars ...
M. G. Guarcello, J. J. Drake, N. J. Wright, J. F. Albacete-Colombo, C. Clarke, B. Ercolano, E. Flaccomio, V. Kashyap, G. Micela, T. Naylor, N. Schneider, S. Sciortino, J. S. Vink   +12 more
doaj   +1 more source

vcdisk.py: Rotation curves of thick galaxy disks

, 2022
vcdisk: Rotation curves of thick galaxy disks A minimal python module to solve Poisson's equation in a thick galactic disk. This is useful to compute the circular velocity on the disk plane of a galaxy with observed surface density profile and ...
Lorenzo Posti
core   +1 more source

Color dichotomy and gradients in the bulges and disks of EFIGI galaxies along the Hubble sequence

Astronomy & Astrophysics
Context. One of the most outstanding questions in contemporary astrophysics is: What is the significance of galaxy morphology? What physical processes underlie the morphologies we observe and is a galaxy’s internal structure shaping its evolution (nature)
Quilley L., Lehnert M. D., de Lapparent V.   +2 more
doaj   +1 more source

Abundances and ages of the deconvolved thin/thick disks of the Galaxy.

, 2004
To appear in Chemical Abundances and Mixing in Stars in the Milky Way Galaxy and its Satellites, ESO Astrophysics Symposia, ed. L. Pasquini & S. Randich (Springer-Verlag Press)We have investigated the abundance of several chemical elements in two large ...
Soubiran, C., Girard, Pascal
core   +7 more sources

Secondary evolution of galaxies investigated by N-body simulations [PDF]

, 2008
In the ΛCDM cosmology, merging is one of the most important physical processes that drives the formation and evolution of galaxies. In the present work, we use N-body techniques to investigate some of currently open issues related to the formation and ...
Coppola, Giuseppina
core   +1 more source

The Chemodynamics of the Stellar Populations in M31 from APOGEE Integrated-light Spectroscopy

The Astrophysical Journal, 2023
We present an analysis of nearly 1000 near-infrared, integrated-light spectra from APOGEE in the inner ∼7 kpc of M31. We utilize full-spectrum fitting with A-LIST simple stellar population spectral templates that represent a population of stars with the ...
Benjamin J. Gibson, Gail Zasowski, Anil Seth, Aishwarya Ashok, Kameron Goold, Tobin Wainer, Sten Hasselquist, Jon Holtzman, Julie Imig, Dmitry Bizyaev, Steven R. Majewski   +10 more
doaj   +1 more source

Mapping metallicity variations across nearby galaxy disks

, 2019
The distribution of metals within a galaxy traces the baryon cycle and the buildup of galactic disks, but the detailed gas phase metallicity distribution remains poorly sampled.
McElroy, R., Blanc, G.~A., Leroy, A.~K., Kruijssen, J. M. D., Chevance, M., Schruba, A., Glover, S.~C.~O., Ho, I.-T, Meidt, S., Faesi, C., Pety, J., Sanchez-Blazquez, P., Grasha, K., Congiu, E., Saito, T., van der Wel, Sharon Meidt, Kruijssen, J., Meidt, S. E., Kruijssen, J.~M.~D., Groves, B., Schinnerer, E., Santoro, F., Leroy, A. K., Blanc, G. A., Rosolowsky, E., Kreckel, K., Sandstrom, K., Lang, P., Bigiel, F., Glover, S. C. O., Ho, I., Leroy, A., Emsellem, E., Meidt, Sharon, Blanc, G., Glover, S., Ho, I. -T.   +36 more
core   +1 more source

Galaxy disks are submaximal [PDF]

, 2011
We measure the contribution of galaxy disks to the overall gravitational potential of 30 nearly face-on intermediate-to-late-type spirals from the DiskMass Survey.
Marc A. W. Verheijen, Matthew A. Bershady, Swaters, Rob A., Thomas P. K. Martinsson, David R. Andersen, Bershady, Matthew A., Verheijen, Marc A. W., Rob A. Swaters, Andersen, David R., Westfall, Kyle B., Martinsson, Thomas P. K., Kyle B. Westfall   +11 more
core   +1 more source