Science Updates - A look at CfA discoveries from recent journals

March 22, 2019

The sparsely distributed hot gas that exists in the space between galaxies, the intergalactic medium, is ionized. The question is, how? Astronomers know that once the early universe expanded and cooled enough, hydrogen (its main constituent) recombined into neutral atoms.

field of galaxies in the costellation Bootes
March 15, 2019

All massive galaxies are believed to host supermassive black holes (SMBH) at their centers that grow by accreting mass from their environment. The current picture also imagines that the black holes grow in size as their host galaxy evolves, perhaps because galaxy evolution includes accretion triggered, for example, by galaxy mergers.

false-color infrared image of the molecular cloud containing the young star IRAS16293-2422
March 8, 2019

Heterocyclic molecules are those containing atoms of at least two different elements (plus hydrogen) arranged in a ring structure. Nitrogen heterocycles are key components in biological nucleic acids, and in theories of the origins of biogenic molecules they were synthesized from abundant, simpler nitrogen molecules like hydrogen cyanide, HCN.