64 citations · 217 across the 13 of their papers we have counts for
12 papers
Helium at white dwarf photospheric conditions: preliminary laboratory results
Marc Schaeuble, Ross E. Falcon, Thomas A. Gomez +3
We present preliminary results of an experimental study exploring helium at photospheric conditions of white dwarf stars. These data were collected at Sandia National Laboratories'…
Modeling the Spectra of Dense Hydrogen Plasmas: Beyond Occupation Probability
T. A. Gomez, M. H. Montgomery, T. Nagayama +2
Accurately measuring the masses of white dwarf stars is crucial in many astrophysical contexts (e.g., asteroseismology and cosmochronology). These masses are most commonly determin…
Reaching Higher Densities for Laboratory White Dwarf Photospheres to Measure Spectroscopic Line Profiles
Ross E. Falcon, J. E. Bailey, T. A. Gomez +5
As part of our laboratory investigation of the theoretical line profiles used in white dwarf atmosphere models, we extend the electron-density () range measured by our e…
Laboratory Measurements of White Dwarf Photospheric Spectral Lines: H
Ross E. Falcon, G. A. Rochau, J. E. Bailey +4
We spectroscopically measure multiple hydrogen Balmer line profiles from laboratory plasmas to investigate the theoretical line profiles used in white dwarf atmosphere models. X-ra…
Which Hydrogen Balmer Lines Are Most Reliable for Determining White Dwarf Atmospheric Parameters?
Ross E. Falcon, G. A. Rochau, J. E. Bailey +4
Our preliminary results from laboratory experiments studying white dwarf (WD) photospheres show a systematic difference between experimental plasma conditions inferred from measure…
Chemical Abundances of RR Lyrae Type C Star AS162158
Jose Govea, Thomas Gomez, George W. Preston +1
We report the first extensive model atmosphere and detailed chemical abundance study of eight RR Lyrae variable stars of c subclass throughout their pulsation cycles. Atmospheric p…
Outflows from Evolved Stars: The Rapidly Changing Fingers of CRL618
Bruce Balick, Martín Huarte-Espinosa, Adam Frank +4
Our ultimate goal is to probe the nature of the collimator of the outflows in the pre PN CRL618. CRL618 is uniquely suited for this purpose owing to its multiple, bright, and caref…
An Experimental Platform for Creating White Dwarf Photospheres in the Laboratory
Ross E. Falcon, G. A. Rochau, J. E. Bailey +8
We present an experimental platform for measuring hydrogen Balmer emission and absorption line profiles for plasmas with white dwarf (WD) photospheric conditions (T_e ~ 1 eV, n_e ~…
The [Fe/H] Dependence on the Ca {\sc ii}- Relationship
Thomas Gomez, George Wallerstein, Elena Pancino
We examined the Wilson-Bappu effect, a relationship between the absolute magnitude of the star, , and the logarithm of the Ca {\sc ii} emission width, , over the largest…
Creating White Dwarf Photospheres in the Laboratory: Strategy for Astrophysics Applications
Ross E. Falcon, G. A. Rochau, J. E. Bailey +9
Astrophysics experiments by Falcon et al. to create white dwarf photospheres in the laboratory are currently underway. The experimental platform measures Balmer line profiles of a…
The Illumination and Growth of CRL 2688: An Analysis of New & Archival HST Observations
Bruce Balick, Thomas Gomez, Dejan Vinković +3
We present four-color images of CRL 2688 obtained in 2009 using the Wide-Field Camera 3 on HST. The F606W image is compared with archival images in very similar filters to monitor…
Metal Abundance Calibration of the Ca II Triplet Lines in RR Lyrae Stars
George Wallerstein, Thomas Gomez, Wenjin Huang
The GAIA satellite is likely to observe thousands of RR Lyrae stars within a small spectral window, between 8470A and 8750A, at a resolution of 11,500. In order to derive the metal…