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Astrophysicists Find Evidence of Black Holes Ripping Stars Apart

By Guest PostOctober 17, 2011Scienceaccretion disk, active galactic nuclei, astrophysicists, black holes, chaotic orbits, cosmologists, dennis zaritsky, destroying stars, evidence of black holes, intermediate mass, johns hopkins university's, large galaxies, sdss, sloan digital sky survey, steward observatory, super-massive black hole, suvi gezari, university of arizona

*Sifting through observation data obtained of more than 2 million galaxies, a research team including UA astronomer Dennis Zaritsky has discovered phenomena telling of stars dying a violent death.

Astrophysicists at the University of Arizona and elsewhere have found evidence of black holes destroying stars, a long-sought phenomenon that provides a new window into general relativity.

The research, reported in the latest issue of the Astrophysical Journal, also opens up a method to search for the possible existence of a large population of presently undetectable “intermediate mass” black holes, which are hypothesized to be precursors to the super-massive black holes at the centers of most large galaxies. (more…)

NASA’s WISE Mission Captures Black Hole’s Wildly Flaring Jet

By Guest PostSeptember 21, 2011Sciencea w blain, accretion disks, astronomers, black hole called gx 339 4, black holes, blazing jets, center of our galaxy, d m russell, extreme environments around black holes, flaring black hole, gamma rays, gravity, infrared observations, japan aerospace exploration agency, jaxa, jets, magnetic field, NASA, neowise, peter eisenhardt, physics of jets, poshak gandhi, radio waves, s markoff, speed of light, ultra dense collection of matter, wide field infrared survey explorer, wise, xrays

PASADENA, Calif. — Astronomers using NASA’s Wide-field Infrared Survey Explorer (WISE) have captured rare data of a flaring black hole, revealing new details about these powerful objects and their blazing jets.

Scientists study jets to learn more about the extreme environments around black holes. Much has been learned about the material feeding black holes, called accretion disks, and the jets themselves, through studies using X-rays, gamma rays and radio waves. But key measurements of the brightest part of the jets, located at their bases, have been difficult despite decades of work. WISE is offering a new window into this missing link through its infrared observations. (more…)

X-Ray Telescope Finds New Voracious Black Holes in Early Universe

By Guest PostJune 17, 2011Sciencebig bang, black holes, cdfs, chandra, chandra deep field south, chandra x ray observatory, cosmic dawn, cosmic fog, early universe, eric gawiser, ezequiel treister, galaxies, giant black holes, Hubble Space Telescope, kevin schawinski, marta volonteri, massive black holes, NASA, neutral hydrogen, new jersey, optical and infrared images, photons, physics, priya natarajan, quasars, reionization, Rutgers University, supermassive black holes, university of hawaii, university of michigan, x ray image, yale university, young black holes

ANN ARBOR, Mich.— Using the deepest X-ray image ever taken, a University of Michigan astronomer and her colleagues have found the first direct evidence that massive black holes were common in the early universe. This discovery from NASA’s Chandra X-ray Observatory shows that very young black holes grew more aggressively than previously thought, in tandem with the growth of their host galaxies.

By pointing Chandra at a patch of sky for over six weeks, astronomers obtained what is known as the Chandra Deep Field South (CDFS). When combined with very deep optical and infrared images from NASA’s Hubble Space Telescope, the new Chandra data allowed astronomers to search for black holes in 200 distant galaxies, from when the universe was between about 800 million and 950 million years old. (more…)

CU-Boulder-Led Hubble Astronomy Team Uncovers Evidence of Early Heated Universe

By Guest PostOctober 8, 2010Scienceastrophysical and planetary sciences, big bang, black hole, black holes, charles danforth, cos, cosmic origins spectrograph, dwarf galaxies, galaxies, global warming, hubble, Hubble Space Telescope, kevin france, michael shull, NASA, quasar beacon, radiation, remote universe, small galaxies, universal warming, universe, university of colorado at boulder

If you think global warming is bad, 11 billion years ago the entire universe underwent what might be called universal warming. The consequence of that early heating was that fierce blasts of radiation from voracious black holes stunted the growth of some small galaxies for a stretch of 500 million years. (more…)

Tag Archives: black holes

Astrophysicists Find Evidence of Black Holes Ripping Stars Apart

*Sifting through observation data obtained of more than 2 million galaxies, a research team including UA astronomer Dennis Zaritsky has discovered phenomena telling of stars dying a violent death.

NASA’s WISE Mission Captures Black Hole’s Wildly Flaring Jet

X-Ray Telescope Finds New Voracious Black Holes in Early Universe

CU-Boulder-Led Hubble Astronomy Team Uncovers Evidence of Early Heated Universe