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The afterglow, redshift and extreme energetics of the γ-ray burst of 23 January 1999
- S. Kulkarni, S. Djorgovski, E. Costa
- PhysicsNature
- 1 April 1999
Long-lived emission, known as afterglow, has now been detected from about a dozen γ-ray bursts. Distance determinations place the bursts at cosmological distances, with redshifts, z, ranging from ∼1…
Evidence of Cosmic Evolution of the Stellar Initial Mass Function
- P. V. Dokkum
- Physics
- 3 October 2007
Theoretical arguments and indirect observational evidence suggest that the stellar IMF may evolve with time, such that it is more weighted toward high-mass stars at higher redshift. Here we test this…
The afterglow, the redshift, and the extreme energetics of the gamma-ray burst 990123
- S. Kulkarni, S. Djorgovski, E. Costa
- Physics
- 19 February 1999
Afterglow, or long-lived emission, has now been detected from about a dozen well-positioned gamma-ray bursts. Distance determinations made by measuring optical emission lines from the host galaxy, or…
A REMARKABLY LUMINOUS GALAXY AT Z = 11.1 MEASURED WITH HUBBLE SPACE TELESCOPE GRISM SPECTROSCOPY
- P. Oesch, G. Brammer, S. Willner
- Physics
- 1 March 2016
We present Hubble WFC3/IR slitless grism spectra of a remarkably bright z ≳ 10 galaxy candidate, GN-z11, identified initially from CANDELS/GOODS-N imaging data. A significant spectroscopic continuum…
A substantial population of low-mass stars in luminous elliptical galaxies
- P. V. Dokkum, C. Conroy
- PhysicsNature
- 29 September 2010
TLDR
The Fundamental Plane in CL 0024 at z = 0.4: implications for the evolution of the mass-to-light ratio
- P. V. Dokkum, M. Franx
- Physics
- 14 March 1996
We present results on the Fundamental Plane of early-type galaxies in the rich cluster CL 0024+16 at z=0.391. The galaxies satisfy a tight Fundamental Plane relation which is similar to that at low…
A SPECTROSCOPIC REDSHIFT MEASUREMENT FOR A LUMINOUS LYMAN BREAK GALAXY AT z = 7.730 USING KECK/MOSFIRE
- P. Oesch, P. V. Dokkum, D. Magee
- Physics
- 18 February 2015
We present a spectroscopic redshift measurement of a very bright Lyman break galaxy at z = 7.7302 ± 0.0006 ?> using the Keck/Multi-Object Spectrometer for Infra-Red Exploration. The source was…
The Recent and Continuing Assembly of Field Elliptical Galaxies by Red Mergers
- P. V. Dokkum
- Physics
- 27 June 2005
We present a study of tidal debris associated with 126 nearby red galaxies, selected from the 1.2 deg2 Multiwavelength Survey by Yale-Chile and the 9.3 deg2 NOAO Deep Wide-Field Survey. In the full…
SPECTROSCOPIC CONFIRMATION OF THE EXISTENCE OF LARGE, DIFFUSE GALAXIES IN THE COMA CLUSTER
- P. V. Dokkum, A. Romanowsky, Jielai Zhang
- Physics
- 13 April 2015
We recently identified a population of low surface brightness objects in the field of the z = 0.023 Coma cluster, using the Dragonfly Telephoto Array. Here we present Keck spectroscopy of one of the…
A HIGH STELLAR VELOCITY DISPERSION AND ∼100 GLOBULAR CLUSTERS FOR THE ULTRA-DIFFUSE GALAXY DRAGONFLY 44
- P. V. Dokkum, R. Abraham, Jielai Zhang
- Physics
- 20 June 2016
Recently a population of large, very low surface brightness, spheroidal galaxies was identified in the Coma cluster. The apparent survival of these ultra-diffuse galaxies (UDGs) in a rich cluster…
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