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99 papers · 2 filters
Haro15: Is it actually a low metallicity galaxy?
V. Firpo, G. Bosch, G. Hagele +2
We present a detailed study of the physical properties of the nebular material in multiple knots of the blue compact dwarf galaxy Haro 15. Using long slit and echelle spectroscopy,…
The GALEX Arecibo SDSS Survey. I. Gas Fraction Scaling Relations of Massive Galaxies and First Data Release
Barbara Catinella, David Schiminovich, Guinevere Kauffmann +23
We introduce the GALEX Arecibo SDSS Survey (GASS), an on-going large program that is gathering high quality HI-line spectra using the Arecibo radio telescope for an unbiased sample…
The Effect of Gas Fraction on the Morphology and Time-scales of Disc Galaxy Mergers
Jennifer M. Lotz, Patrik Jonsson, T. J. Cox +1
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 inc…
The Effect of Mass Ratio on the Morphology and Time-scales of Disc Galaxy Mergers
Jennifer M. Lotz, Patrik Jonsson, T. J. Cox +1
The majority of galaxy mergers are expected to be minor mergers. The observational signatures of minor mergers are not well understood, thus there exist few constraints on the mino…
The Growth of Massive Galaxies Since z=2
Pieter G. van Dokkum, Katherine E. Whitaker, Gabriel Brammer +11
We study the growth of massive galaxies from z=2 to the present using data from the NEWFIRM Medium Band Survey. The sample is selected at a constant number density of n=2x10^-4 Mpc…
A candidate redshift z ~ 10 galaxy and rapid changes in that population at an age of 500 Myr
R. J. Bouwens, G. D. Illingworth, I. Labbe +9
Searches for very-high-redshift galaxies over the past decade have yielded a large sample of more than 6,000 galaxies existing just 900-2,000 million years (Myr) after the Big Bang…