Dame Carole Jordan: A Pioneer in Astrophysics and Champion for Women in Science

Dame Carole Jordan, who has died aged 84, was a prominent figure in astrophysics, celebrated for her groundbreaking research on the outer atmosphere of the sun and other cool stars. Her contributions to the field have left a lasting impact, and her legacy extends beyond her scientific achievements as a champion for women in science.

Jordan's fascination with astronomy began at a young age, inspired by books from authors like Arthur Eddington and Fred Hoyle. She pursued her passion for astronomy at University College London, where she was interviewed by CW Allen, professor of astronomy, and offered a place. Her academic journey led her to become a leading expert in ultraviolet spectroscopy of the sun and other stars.

In 1962, a rocket-borne experiment led by US astronomer Richard Tousey measured the EUV spectrum of the sun, discovering a dozen unidentified emission lines. Jordan dedicated her research to understanding these lines, eventually becoming the world expert on the subject. Her 1965 PhD thesis, Analysis of the Solar Ultraviolet Spectrum, concluded that several lines were due to transitions in highly ionized iron.

Jordan's most-cited paper, The Ionization Equilibrium of Elements Between Carbon and Nickel, published in 1969, laid out the ionization equilibrium as a function of temperature for the main ionized states of common heavy elements. This work became a definitive guide to EUV spectroscopy. The launch of the International Ultraviolet Explorer (IUE) in 1978 enabled her to extend her analyses to other stars, solidifying her position as an expert on the chromospheres of cool stars.

Jordan's achievements extended beyond her scientific contributions. In 1994, she became the first female president of the Royal Astronomical Society, a testament to her dedication to promoting women in science. She was also a staunch supporter of the Royal Astronomical Society, serving as secretary and vice-president of the Institute of Physics.

Throughout her career, Jordan received numerous accolades, including the RAS's gold medal in 2005 and being made a dame in 2006. Her legacy serves as an inspiration to future generations of scientists, particularly women, to pursue careers in STEM fields.