Project 12:
The connection between spectral subtype and effective temperature is known as the “effective temperature scale,” and is fundamental in characterizing the physical properties of stars. Although much work has gone into refining the temperature scale of the hottest O-type stars, there is surprisingly little agreement in the literature as to the effective temperature scale of their slightly cooler counterparts, the B-type stars. The goal of this project is to develop a modern calibration of the temperatures of the B-type stars.
The Spacegrant student would learn how to classify early-type stars (particularly B stars), and then apply this to classifying computer-generated spectra of known temperatures, gravities, and metallicity. This will lead directly to an effective temperature scale which can be applied to various stellar clusters containing B stars. I estimate this work will require about 5 hours/week over two semesters.
The student will be able to present their results at the Spring 2025 Flagstaff Astronomy Symposium, in addition to the usual Space Grant meeting. The work should lead to a refereed publication in the Astronomical Journal; the student will have the opportunity to take the lead on preparing the paper for publication.