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15 papers · 2 filters
Fe K emission in the ultraluminous infrared galaxy Arp220
K. Iwasawa, D. B. Sanders, A. S. Evans +3
Prominent Fe K line emission is detected at around 6.7 keV in the XMM-Newton spectrum of the ultraluminous infrared galaxy Arp220. The continuum emission in the 2.5-10 keV band is…
Constraining the Equation of State with Moment of Inertia Measurements
James M. Lattimer, Bernard F. Schutz
We estimate that the moment of inertia of star A in the recently discovered double pulsar system PSR J0737-3039 may be determined after a few years of observation to something like…
The Ultimate Energy Density of Observable Cold Matter
James M. Lattimer Madappa Prakash
We demonstrate that the largest measured mass of a neutron star establishes an upper bound to the energy density of observable cold matter. An equation of state-independent express…
Photometric Identification of the low-Mass Population of Orion OB1b I: The sigma Ori Cluster
W. H. Sherry, F. M. Walter, S. J. Wolk
We report an optical photometric survey of 0.89 sq. degrees of the Orion OB1b association centered on sigma Ori. This region includes most of the sigma Ori cluster, the highest den…
A Search for Dense Molecular Gas in High Redshift Infrared-Luminous Galaxies
C. L. Carilli, P. Solomon, P. Vanden Bout +8
We present a search for HCN emission from four high redshift far infrared (IR) luminous galaxies. Current data and models suggest that these high IR luminous galaxies represent…
An Upper Bound on the Flux Ratio of rho CrB's Companion at 1.6um
C. Bender, M. Simon, L. Prato +2
We use high resolution infrared spectroscopy to investigate the 2001 report by Gatewood and colleagues that rho CrB's candidate extrasolar planet companion is really a low-mass sta…