An Observational Determination of the Proton to Electron Mass Ratio in the Early Universe (2009)
Thompson, Rodger I., Bechtold, Jill, Black, John H., Eisenstein, Daniel, Fan, Xiaohui, Kennicutt, Robert C., ...
In an effort to resolve the discrepancy between two measurements of the fundamental constant mu, the proton to electron mass ratio, at early times in the universe we reanalyze the same data used in...
P-Cygni Profiles of Molecular Lines toward Arp 220 Nuclei (2009)
Sakamoto, Kazushi, Aalto, Susanne, Wilner, David J., Black, John H., Conway, John E., Costagliola, Francesco, ...
We report ~100 pc (0.3") resolution observations of (sub)millimeter HCO+ and CO lines in the ultraluminous infrared galaxy Arp 220. The lines peak at two merger nuclei, with HCO+ being more spatially...
Alternative Data Reduction Procedures for UVES: Wavelength Calibration and Spectrum Addition (2008)
Thompson, Rodger I., Bechtold, Jill, Black, John H.
This paper addresses alternative procedures to the ESO supplied pipeline procedures for the reduction of UVES spectra of two quasar spectra to determine the value of the fundamental constant mu =...
A Study of Quasar Absorption Line Systems with IRAS (2007)
A. M. Tanner, Tanner Jill Bechtold, R. M. Cutri, C. E. Walker, John H. Black
A survey of quasar absorbers was conducted using the Infrared Astronomical Satellite (IRAS) database. Quasars with known intervening absorption-line systems and broad absorption line (BAL) QSOs were...
A New Measurements of the Cosmic Microwave Background Radiation Temperature at z = 1.97 (1996)
Ge, Jian, Bechtold, Jill, Black, John H.
We present detections of absorption from the ground state and excited states of C I in the z = 1.9731 damped Ly\al\ system of the QSO 0013$-$004. The excitation temperature between the J = 0 and J =...
Elementary school curriculum approaches /--by John H. Black. (1938)
Thesis (M. Ed.)--University of Oklahoma, 1938.