报告题目: |
Star Formation, Gas, and Dust in CANDELS Galaxies |
报告人: |
Prof. Sandra Faber (UCSC) |
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报告时间: |
2018-09-13 14:00 |
报告地点: |
蒙民伟科技南楼S727 |
主办单位: |
物理系天体物理研究所 |
简介: |
ABSTRACT The CANDELS survey on the Hubble Space Telescope has produced high-quality photometric information from the far-UV to the near-IR that can be used to measure star-formation rates and reddening. This talk will compare the CANDELS star-formation rates to IR values and summarize the variation versus redshift, stellar mass, and galaxy radius. The resulting rates will then be used to deduce total gas content using the Schmidt-Kennicutt law. Dust predictions are generated from these gas masses, which are then compared to observed reddening from the SEDs. Much more dust is predicted than inferred from SED reddening. The discrepancy can be resolved if most of the dust is sequestered in small, dense clumps and therefore has little effect on the integrated light.
BIO
Sandra Faber is University Professor Emerita at the University of California, Santa Cruz, and a staff member of the UCO/Lick Observatory. She is an observational astronomer with research interests in cosmology and galaxy formation. Some of her major discoveries include the first structural scaling law for galaxies (called the Faber-Jackson law), large-scale flow perturbations in the expansion of the Universe caused by superclusters of galaxies, and black holes at the centers of galaxies. She established the scientific case for the twin Keck 10 m telescopes, which inspired a subsequent wave of giant optical telescope building all over the world.
Faber received her BA degree in Physics from Swarthmore College and her PhD in Astronomy from Harvard. She is a member of the U.S. National Academy of Sciences, the American Academy of Arts and Sciences, and the American Philosophical Society and is a Fellow of the Royal Astronomical Society. She has received the Heinemann Prize, the Antoinette de Vaucouleurs Medal, the Centennial Medal, the Bower Award, the Bruce Medal and the Russell Prize National Medal of Science, the Gruber Cosmology Prize, the Magellanic Premium. |
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