THE KECK LOW-RESOLUTION IMAGING SPECTROMETER
The Low Resolution Imaging Spectrometer (LRIS) for the Cassegrain focus of the Keck 10-meter telescope on Mauna Kea is described. It has an imaging mode so it can also be used for taking direct…
THE UNIVERSAL STELLAR MASS–STELLAR METALLICITY RELATION FOR DWARF GALAXIES
- E. Kirby, J. Cohen, P. Guhathakurta, Lucy Cheng, J. Bullock, A. Gallazzi
- Physics, Geology
- 2 October 2013
We present spectroscopic metallicities of individual stars in seven gas-rich dwarf irregular galaxies (dIrrs), and we show that dIrrs obey the same mass–metallicity relation as the dwarf spheroidal…
Caltech Faint Galaxy Redshift Survey. X. A Redshift Survey in the Region of the Hubble Deep Field North
- J. Cohen, D. Hogg, Kevin Richberg
- Physics
- 2 December 1999
A redshift survey has been carried out in the region of the Hubble Deep Field North using the Low Resolution Imaging Spectrograph (LRIS) at the Keck Observatory. The resulting redshift catalog, which…
Bolometric luminosities and infrared properties of carbon stars in the Magellanic Clouds and the galaxy.
- J. Cohen, J. Frogel, S. Persson, J. Elias
- Physics
- 1 October 1981
Broad band /, 7/, K photometry and narrow band CO and H20 indices have been obtained for 89 luminous red stars in the Large Magellanic Cloud (LMC) and 21 in the Small Magellanic Cloud (SMC), chosen…
MULTI-ELEMENT ABUNDANCE MEASUREMENTS FROM MEDIUM-RESOLUTION SPECTRA. III. METALLICITY DISTRIBUTIONS OF MILKY WAY DWARF SATELLITE GALAXIES
- E. Kirby, G. Lanfranchi, J. Simon, J. Cohen, P. Guhathakurta
- Physics
- 22 November 2010
We present metallicity distribution functions (MDFs) for the central regions of eight dwarf satellite galaxies of the Milky Way: Fornax, Leo I and II, Sculptor, Sextans, Draco, Canes Venatici I, and…
Abundances in a Large Sample of Stars in M3 and M13
- J. Cohen, J. Meléndez
- Physics
- 29 September 2004
We have carried out a detailed abundance analysis for 21 elements in a sample of 25 stars with a wide range in luminosity from luminous giants to stars near the main-sequence turnoff in the globular…
An Abundance Analysis for Four Red Horizontal-Branch Stars in the Extremely Metal-Rich Globular Cluster NGC 6528
- E. Carretta, J. Cohen, R. Gratton, B. Behr
- Physics
- 1 February 2001
We present the results of the first analysis of high-dispersion spectra of four red horizontal-branch stars in the metal-rich globular cluster NGC 6528, located in Baade's window. We find that the…
The O II Luminosity Density of the Universe
- D. Hogg, J. Cohen, R. Blandford, M. Pahre
- Physics
- 14 April 1998
Equivalent widths of [O II] 3727 Å lines are measured in 375 faint galaxy spectra taken as part of the Caltech Faint Galaxy Redshift Survey centered on the Hubble Deep Field. The sensitivity of the…
A CONTINUUM OF H- TO He-RICH TIDAL DISRUPTION CANDIDATES WITH A PREFERENCE FOR E+A GALAXIES
- I. Arcavi, A. Gal-yam, R. Laher
- Physics
- 6 May 2014
We present the results of a Palomar Transient Factory (PTF) archival search for blue transients that lie in the magnitude range between “normal” core-collapse and superluminous supernovae (i.e., with…
Deep Optical Galaxy Counts with the Keck Telescope
We present faint galaxy counts from deep VRI images obtained with the Keck Telescope. These images reach R ~ 27 in median seeing FWHM ~ 0.″5-0.″6, and we detect a integrated galaxy number density of…
...
...