Nolan R. Walborn

Nolan R. Walborn (September 30, 1944 – February 22, 2018) was an American astronomer. He was a recognized expert on the topic of hot, massive stars,^[5] particularly their stellar classification.^[6] Walborn served as a researcher at the Space Telescope Science Institute for over 34 years.^[6]

Nolan Revere Walborn[1]
Born	(1944-09-30)September 30, 1944 Bloomsburg, Pennsylvania
Died	February 22, 2018(2018-02-22) (aged 73)
Education	Ph.D.
Alma mater	University of Chicago
Parents	George M. Walborn (father) Evelyn Loretta Miller (mother)
Scientific career
Fields	Astronomy
Thesis	Some spectroscopic characteristics of the OB stars[2]  (1970)
Doctoral advisor	William Wilson Morgan[3][4]

Biography

Walborn was born in Bloomsburg, Pennsylvania, one of four children of Rev. George M. Walborn and Evelyn Loretta née Miller. His mother had been a teacher prior to her marriage. In 1953, the family relocated to Argentina when the father accepted a posting from the Lutheran Board of World Missions. His mother saw to the children's elementary education through home schooling with a USA-based correspondence school. At the same time, they attended public school, becoming bilingual as a result. Nolan completed high school at the American Community School in Buenos Aires, graduating as class valedictorian.^[7]

Walborn returned to the USA for undergraduate studies in physics at Gettysburg College in Pennsylvania.^[6] He played the trumpet with the Gettysburg College Marching Band,^[8] and spent two years in the Air Force ROTC program.^[7] In between his junior and senior years, he attended his studies at a university institute for space sciences, which led to an interest in astronomy and astrophysics.^[9] Walborn graduated summa cum laude in 1966. He joined Yerkes Observatory for graduate studies in astronomy at the University of Chicago.^[6] He received his doctorate in 1970 under advisor William Wilson Morgan^[3] with a dissertation titled Some spectroscopic characteristics of the OB stars.^[2]

His postgraduate work was at the David Dunlap Observatory for the University of Toronto, followed in 1973 by work as a staff astronomer at Cerro Tololo Inter-American Observatory in Chile. While there, his studies included some of the hottest known stars, being of stellar class O3.^[5][10] In 1979 helped draft the proposal to NASA to manage the Space Telescope Science Institute, particularly the science management component. He was a Senior Research Associate at NASA's Goddard Space Flight Center before joining the Space Telescope Science Institute in 1984. There he would remain for the next 34 years, serving in a variety of roles.^[6]

During his career, Walborn was listed as an author on 214 peer-reviewed publications. Among his more notable works were studies of the Tarantula Nebula, Eta Carinae, Theta¹ Orionis C,^[5] and the properties of young, massive star clusters.^[6] During the 1980s, he collaborated with Barry M. Lasker to identify the progenitor star for SN 1987A.^[5] He was the author of chapter 3 of Stellar Spectral Classification, published in 2009 by Princeton University Press.^[11] On February 22, 2018, the asteroid 25942 Walborn (2001 EH9) was named in his honor.^[3][4] His family chose to launch some of his ashes into space, a service performed by the Celestis company with the flight name Enterprise.^[8][12]