Science Updates - A look at CfA discoveries from recent journals

radio image of galaxy 3C062
October 11, 2019

Most galaxies host a supermassive black hole (SMBH) at their nucleus, one whose mass exceeds a million solar-masses. When material actively accretes onto the SMBH, associated processes can produce an active galactic nucleus (AGN) with a hot torus and dramatic bipolar jets of rapidly moving charged particles.

elliptical galaxy IC4293
October 4, 2019

The oldest known large galactic structures in the universe are giant elliptical galaxies. Unlike our Milky Way and other spiral galaxies, elliptical galaxies have no spiral arms and little or no current star formation activity. Astronomers think that these giants formed in the early universe, less than a billion years after the big bang, after a phase of rapid star-formation.

Impulsive Coronal Heating from Large-scale Magnetic Rearrangements: From IRIS to SDO/AIA,” Fabio Reale, Paola Testa, Antonino Petralia, and David R. Graham  ApJ 882, 7, 2019
September 27, 2019

The hot outer layer of the sun, the corona, has a temperature of over a million degrees Kelvin, much more than the surface temperature of the Sun which is only about 5500 degrees Kelvin. Moreover, the corona is very active and ejects a wind of charged particles at a rate equivalent to about one-millionth of the moon's mass each year.