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Do Black Holes Come in Size Medium?

By Guest PostNovember 29, 2013Scienceblack holes, circinus spiral galaxy, dominic walton, exotic phenomenon, galactic landscape, hearts of galaxies, high energy xrays, immense gravity, Japan, largest black holes, matteo bachetti, NASA, nustar, open issue, size medium, suzaku satellite, topsy turvy galaxy, ulxs, xrays

Black holes can be petite, with masses only about 10 times that of our sun — or monstrous, boasting the equivalent in mass up to 10 billion suns. Do black holes also come in size medium? NASA’s Nuclear Spectroscopic Telescope Array, or NuSTAR, is busy scrutinizing a class of black holes that may fall into the proposed medium-sized category.

“Exactly how intermediate-sized black holes would form remains an open issue,” said Dominic Walton of the California Institute of Technology, Pasadena. “Some theories suggest they could form in rich, dense clusters of stars through repeated mergers, but there are a lot of questions left to be answered.” (more…)

Catching Black Holes on the Fly

By Guest PostSeptember 7, 2013Scienceblack hole hunter, black hole population, black holes, new black hole, nustar mission, space telescope

NASA’s black-hole-hunter spacecraft, the Nuclear Spectroscopic Telescope Array, or NuSTAR, has “bagged” its first 10 supermassive black holes. The mission, which has a mast the length of a school bus, is the first telescope capable of focusing the highest-energy X-ray light into detailed pictures. (more…)

Ultracold Big Bang experiment successfully simulates evolution of early universe

By Guest PostSeptember 1, 2013Scienceabsolute zero, andrei sakharov, background radiation, beginning of universe, big bang, black holes, chao lin kuo, chen lung hung, cheng chin, cmb, cobe, cosmic microwave, dynamics, early universe, evolution, excitations, galaxy formation, infant universe, initial conditions, john carlstrom, laboratory simulation, matter and radiation, michael turner, phenomenon, power of physics, russian physicist, sakharov acoustic oscillations, sakharov oscillations, simulation, sound wave excitations, stanford university, ultracold big bang, ultracold cesium atoms, university of chicago, vacuum chamber, wayne hu, wmap

Physicists have reproduced a pattern resembling the cosmic microwave background radiation in a laboratory simulation of the Big Bang, using ultracold cesium atoms in a vacuum chamber at the University of Chicago.

“This is the first time an experiment like this has simulated the evolution of structure in the early universe,” said Cheng Chin, professor in physics. Chin and his associates reported their feat in the Aug. 1 edition of Science Express, and it will appear soon in the print edition of Science. (more…)

Bright Stars to Black Holes: UA Astronomer Awarded for Her Research

By Guest PostDecember 17, 2012Scienceblack holes, collapsed stars, collision of cloud, galactic center, invisible objects, neutron stars

In addition to being selected as one of 50 scholars awarded fellowships each year at the prestigious Radcliffe Institute at Harvard University, the UA’s Feryal Ozel has won the 2013 American Physical Society’s Maria Goeppert Mayer Award for her cutting-edge research on neutron stars

Feryal Ozel studies two things most people don’t think about everyday: neutron stars and black holes. (more…)

MSU Research Sheds New Light on Star Clusters, Black Holes

By Guest PostOctober 7, 2012Scienceblack holes, globular clusters, radio observations, radio wavelengths, two black holes

EAST LANSING, Mich. — Research by Michigan State University astronomers has scientists re-thinking the fates of black holes, particularly in groups of stars known as globular clusters. (more…)

Pair of Black Holes ‘Weigh In’ At 10 Billion Suns, The Most Massive Yet

By Guest PostDecember 5, 2011Scienceblack holes, mass, solar mass, weighing

AUSTIN, Texas — A team of astronomers including Karl Gebhardt and graduate student Jeremy Murphy of The University of Texas at Austin have discovered the most massive black holes to date — two monsters weighing as much as 10 billion suns and threatening to consume anything, even light, within a region five times the size of our solar system. (more…)

Astrophysicists Find Evidence of Black Holes Ripping Stars Apart

By Guest PostOctober 17, 2011Scienceaccretion disk, active galactic nuclei, agn flares, black holes, intermediate mass, stellar, tdf flares, tdfs, tidal disruption flares

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. (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…)

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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