Iridium Metal in Melt Rock from the Chicxulub Impact Basin
We identified a ~4-micrometer-long, ~1 x 10^-10 g "nugget" of Ir metal in a melt rock sample from the Chicxulub impact basin. This particle, which consists of...
IRMOS: The near-infrared multi-object spectrograph for the TMT
We present an overview of the near-InfraRed Multi-Object Spectrograph (IRMOS) for the Thirty Meter Telescope, as developed under a Feasibility Study at the...
Iron Depletion in Ionized Nebulae of the Large Magellanic Cloud
We present here preliminary results of an analysis of the iron abundance in the ionized gas of three planetary nebulae and one H II region of the Large...
Iron Lines and Surface Gravity Determination for τ Ceti
The authors present a spectroscopic analysis for the gravity determination of τ Ceti on the basis of a new and high quality set of data. The iron lines are...
Irradiation of the secondary star in X-ray Nova Scorpii 1994 (=GRO J1655-40)
We have obtained intermediate resolution optical spectra of the black-hole candidate Nova Sco 1994 in June 1996, when the source was in an X-ray/optical active...
We request 13.9 hours of IRS GTO time to observe two recently discovered very low-mass T dwarfs, the early-T HN PegB and the very late-T ULAS J0034. As inferred...
We propose to use the low spectral resolution capabilities of IRS to obtain high signal-to-noise mid-infrared spectra of a sample of 70 Ultra- and Hyperluminous...
The ESO 32-channel infrared (1 -5 micron-meter) grating spectrometer, IRSPEC, was put into operation and made available for Visiting Astronomers in October 1986...