171 citations · 216 across the 4 of their papers we have counts for
6 papers · 1 filter
VLTI/MIDI Observations of the Massive Protostellar Candidate NGC 3603 IRS 9A
Stefan Vehoff, Dieter E. A. Nuernberger, Christian A. Hummel +1
We used MIDI, the mid-infrared interferometric instrument of the VLTI, to observe the massive protostellar candidate IRS 9A, located at a distance of about 7 kpc at the periphery o…
The HgMn Binary Star Phi Herculis: Detection and Properties of the Secondary and Revision of the Elemental Abundances of the Primary
R. T. Zavala, S. J. Adelman, C. A. Hummel +6
Observations of the Mercury-Manganese star Phi Herculis with the Navy Prototype Optical Interferometer (NPOI) conclusively reveal the previously unseen companion in this single-lin…
Tests of stellar model atmospheres by optical interferometry III: NPOI and VINCI interferometry of the M0 giant gamma Sge covering 0.5 - 2.2 microns
M. Wittkowski, C. A. Hummel, J. P. Aufdenberg +1
Aims: We present a comparison of the visual and NIR intensity profile of the M0 giant gamma Sagittae to plane-parallel ATLAS 9 as well as to plane-parallel & spherical PHOENIX mode…
Vega is a rapidly rotating star
D. M. Peterson, C. A. Hummel, T. A. Pauls +8
Vega, the second brightest star in the northern hemisphere, serves as a primary spectral type standard. While its spectrum is dominated by broad hydrogen lines, the narrower lines…
Resolving the Effects of Rotation in Altair with Long-Baseline Interferometry
D. M. Peterson, C. A. Hummel, T. A. Pauls +7
We report successful fitting of a Roche model, with a surface temperature gradient following the von Zeipel gravity darkening law, to observations of Altair made with the Navy Prot…
Testing Stellar Models With An Improved Physical Orbit for 12 Bootis
Andrew F. Boden, Guillermo Torres, Christian A. Hummel
We report on a significantly improved determination of the physical orbit of the double-lined spectroscopic binary system 12 Boo. We have a 12 Boo interferometry dataset spanning s…