Laura R. Penny

A FUSE Survey of the Rotation Rates of Very Massive Stars in the Small and Large Magellanic Clouds (2009)

Penny, Laura R., Gies, Douglas R.

We present projected rotational velocity values for 97 Galactic, 55 SMC, and 106 LMC O-B type stars from archival FUSE observations. The evolved and unevolved samples from each environment are...

Tomographic Separation of Composite Spectra. XI. The Physical Properties of the Massive Close Binary HD 100213 (TU Muscae) (2009)

Penny, Laura R., Ouzts, Cynthia, Gies, Douglas R.

We present the results of a Doppler tomographic reconstruction of the UV spectra of the double-lined, O binary HD 100213 based on observations made with the International Ultraviolet Explorer (IUE)....

Effects of Metallicity on the Rotation Rates of Massive Stars (2004)

Penny, Laura R., Sprague, Amanda J., Seago, George, Gies, Douglas R.

Recent theoretical predictions for low metallicity massive stars predict that these stars should have drastically reduced equatorial winds (mass loss) while on the main sequence, and as such should...

Tomographic Separation of Composite Spectra. VIII. The Physical Properties of the Massive Compact Binary in the Triple Star System HD 36486 (delta Orionis A) (2001)

Harvin, James A., Gies, Douglas R., Bagnuolo, William G., Penny, Laura R., Thaller, Michelle L.

Double-lined spectroscopic orbital elements have recently been found for the central binary in the massive triple, delta Orionis A based on radial velocities from cross-correlation techniques applied...

Orbits of Four Very Massive Binaries in the R136 Cluster (2001)

Massey, Philip, Penny, Laura R., Vukovich, Julia

We present radial velocity and photometry for four early-type, massive double-lined spectroscopic binaries in the R136 cluster. Three of these systems are eclipsing, allowing orbital inclinations to...