Ruth Agnes Daly
Ruth Agnes Daly (born 1958) is an American astrophysicist.[1]
Education and career
Daly obtained a B.A. in Psychology and English from
Research
Daly conducts theoretical, phenomenological, and observational work in astrophysics. Her main areas of study are cosmology and extragalactic astrophysics. She is most well known for her work on the expansion and acceleration histories of the universe, the use of these histories to determine the contents of the universe, and studies of the properties of supermassive black holes, e.g., as summarized.[3] Non-specialists interested in this work can read about it in the popular literature, such as Sky & Telescope.[4] Some key results, obtained in collaboration with Professor Stanislav George Djorgovski, are that the expansion and acceleration histories of the universe can be determined in a model-independent manner, which does not require that a theory of gravity be specified and does not depend upon the contents of the universe. The results indicate that the universe is accelerating at the present time, and was decelerating in the recent past. Daly has also shown that the properties of outflows from the vicinity of a supermassive black hole can be used to estimate the spin of the black hole. Her ongoing research into the acceleration of the universe and the properties of supermassive black holes is discussed in detail in her publications, linked at her website.
Recognition
Daly was named a
References
- ^ More information is available at Professor Daly’s webpage http://sites.psu.edu/rdaly/
- ^ PSU Berks campus faculty, http://berks.psu.edu/person/daly-ruth/
- ^ R. Daly, "A Decade of Dark Energy: 1998 - 2008," invited retrospective, in "Sources and Detection of Dark Matter and Dark Energy in the Universe: Proceedings of the 8th UCLA Symposium," AIP Conference Proceedings, Volume 1166, pp. 81-86 (2009), https://sites.psu.edu/rdaly/files/2016/09/D09b-t6sdrs.pdf
- ^ R. Naeye, "Black-Hole Bonanza", Sky & Telescope, January 2010, available at http://www.skyandtelescope.com/astronomy-news/black-hole-bonanza/ and https://sites.psu.edu/rdaly/in-the-news/
- ^ APS Fellow Archive, retrieved 2020-11-07