Many of these presentations involve student research. You can get information about student research in the Department of Physics and Astronomy here at Swarthmore College. You can also see what else my research group is up to.

Refereed papers are archived here.

I gave a very brief presentation on my research interests at the Astro Philly 2008 meeting at Widener University.

IAU 250: Massive Stars as Cosmic Engines met in Kauai in December, 2007. I gave a talk entitled "X-ray Emission from O Stars." And in the 'specialist session' the day before the meeting, on Magnetic Hot Stars, I gave a talk on "X-rays from Magnetically Channeled Winds of OB Stars."

At the June 2007 meeting on Clumping in Hot-Star Winds in Potsdam, Germany, I gave a talk on the Quantitative Constraints Placed on Mass-Loss Rates, Porosity, and Wind Opacity by X-ray Emission Line Profiles.

I gave a colloquium at the American Museum of Natural History in May, 2007; and at the Center for Astrophysics' Solar, Stellar, and Planetary Sciences seminar in June: Quantitative Analysis of the Resolved X-ray Emission Line Profiles of O Stars.

At the American Astronomical Society meeting in Seattle, in January 2007, I gave a short talk on the effects of clumping and mass-loss-rate reduction on x-ray line profile asymmetries. Also, Steve St. Vincent and Asif ud-Doula had a poster on the synthesis of diagnostics from MHD simulations of stellar winds and Mike Kuhn had a poster on the bright B star, beta Crucis. We also had a press release on this last project.

My student, Steve St. Vincent, and I gave a short overview of Steve's summer research project at the Delaware Space Grant Consortium fall meeting at the University of Delaware [you can download the talk and linked movies from this site].

We gave two posters at the American Physical Society's Division of Plasma Physics meeting in Philadelphia, in October, 2006: One was an overview of measurements of flow in the SSX, with Michael Brown as first author [PowerPoint, pdf, jpeg] and the other was on electron temperature measurements in SSX, by my student Vernon Chaplin [PowerPoint, pdf, or jpeg].

In April, 2006, I gave a presentation to admitted students at Swarthmore: "Stellar Evolution: from star birth to star death and back again" which described both student research and material from our introductory astronomy classes.

Earlier in April, 2006, I gave a presentation to parents, students, and alumni during parents' weekend at Swarthmore, on student research at the College [PowerPoint or pdf].

During the Spring of 2006, I gave an updated version of my talk on X-ray Emission from Massive Stars at Williams College, Wesleyan University, and Villanova University.

At the American Astronomical Society meeting in Washington, DC, in January 2006, St. John's College senior, Kevin Grizzard, who worked with me during the previous summer, gave a presentation on Wind Signatures in the X-ray Emission Line Profiles of the O Supergiant ζ Orionis. This work was later published in MNRAS.

In October, 2005 I gave an updated version of my X-ray Emission from Massive Stars talk at Willamette University in Salem, Oregon [ppt, pdf, html].

During the spring of 2005, I gave an updated version of my talk, X-ray Emission from Massive Stars at Vassar College, Gettysburg College, and Widener University [ppt, pdf, html].

In March 2006, I gave a presentation on the moon and moon phases for Mr. Cronin's 3rd grade class at SRS [pdf or html].

A brief presentation on summer student research opportunities in my group, given at the departmental "dog and pony show" on February 3, 2005.

Two students in my research group - Victoria Swisher and Nate Shupe - gave posters at the AAS meeting in San Diego, in January 2005. Swisher, Jensen, Cohen, & Gagne, High-Resolution X-ray Spectroscopy of the Accreting Weak-Line T Tauri Star DoAr 21 and Shupe, Cohen, & MacFarlane, Numerical Modeling Studies of X-ray Photoionization Experiments Driven by Z-Pinch X-rays.

On December 3, 2004 I gave a short presentation to some members of the Swarthmore board of managers on some of the astronomy research I've done with students.

On October 6, 2004 I gave a short lunchtime talk to Swarthmore faculty on my inertial fusion experiments [ppt, pdf].