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14 papers · 2 filters
The essential signature of a massive starburst in a distant galaxy
P. Solomon, P. Vanden Bout, C. Carilli +1
Observations of carbon monoxide (CO) emission in high redshift (z>2) galaxies indicate the presence of large amounts of molecular gas. Many of these galaxies contain an active gala…
The Case for Case C Mass Transfer in the Galactic Evolution of Black Hole Binaries
Gerald E. Brown, Chang-Hwan Lee
Earlier works, which we review, have shown that if the Fe core in a presupernova star is to be sufficiently massive to collapse into a black hole, earlier in the evolution of the s…
HCN Survey of Normal Spiral, IR-luminous and Ultraluminous Galaxies
Yu Gao, Philip M. Solomon
We report systematic HCN J=1-0 (and CO) observations of a sample of 53 infrared (IR) and/or CO-bright and/or luminous galaxies, including seven ultraluminous infrared galaxies, nea…
The Star Formation Rate and Dense Molecular Gas in Galaxies
Yu Gao, Philip M. Solomon
(abridged) HCN luminosity Lhcn is a tracer of DENSE molecular gas, n(H_2) >~ 3x10^4 cm^{-3}, associated with star-forming giant molecular cloud (GMC) cores. We present the results…
Mapping the Circumstellar Environment of T Tauri with Fluorescent H_2 Emission
Frederick M. Walter, Gregory Herczeg, Alexander Brown +6
We have obtained three long-slit, far UV spectra of the pre-main sequence system T Tauri. These HST/STIS spectra show a strong and variable on-source spectrum composed of both fluo…
The Mass Ratio Distribution in Main-Sequence Spectroscopic Binaries Measured by IR Spectroscopy
T. Mazeh, M. Simon, L. Prato +2
We report infrared spectroscopic observations of a large, well-defined sample of main-sequence, single-lined spectroscopic binaries in order to detect the secondaries and derive th…