Black Holes - Professor Joseph Silk
Δημοσιεύτηκε στις 16 Νοε 2016
Supermassive
black holes lurk in the very centres of galaxies. The Milky
Way has a central black hole of four million solar masses. Today it
is quiescent. But we have reason to believe that millions of years
ago it was active. http://www.gresham.ac.uk/lectures-and...
Traces
of exploded debris are seen around our galactic centre that
arose in a violent explosion some tens of millions of years
ago. Most galaxies have massive central black holes, in some
cases weighing billions of solar masses. These once were the sites
of the most energetic phenomena in the universe, that astronomers
recognise as quasars. I will describe feeding the monster
within: the rise of the quasars, and how supermassive black
holes formed long ago. These immensely luminous objects in the
nuclei of galaxies were active when the universe was young.
Current data suggests that supermassive black holes formed along
with the first galaxies. The ultimate window on building
massive black holes is gravity waves, and I will describe gravity
wave experiments being planned to search for traces of the formation
of such black holes.
The transcript and downloadable versions of the lecture are available from the Gresham College website: http://www.gresham.ac.uk/lectures-and...
Gresham
College has been giving free public lectures since 1597. This tradition
continues today with all of our five or so public lectures a week being
made available for free download from our website. There are currently
over 1,900 lectures free to access or download from the website.
Website: http://www.gresham.ac.uk
Twitter: http://twitter.com/GreshamCollege
Facebook: https://www.facebook.com/greshamcollege
Instagram: http://www.instagram.com/greshamcollege
black holes lurk in the very centres of galaxies. The Milky
Way has a central black hole of four million solar masses. Today it
is quiescent. But we have reason to believe that millions of years
ago it was active. http://www.gresham.ac.uk/lectures-and...
Traces
of exploded debris are seen around our galactic centre that
arose in a violent explosion some tens of millions of years
ago. Most galaxies have massive central black holes, in some
cases weighing billions of solar masses. These once were the sites
of the most energetic phenomena in the universe, that astronomers
recognise as quasars. I will describe feeding the monster
within: the rise of the quasars, and how supermassive black
holes formed long ago. These immensely luminous objects in the
nuclei of galaxies were active when the universe was young.
Current data suggests that supermassive black holes formed along
with the first galaxies. The ultimate window on building
massive black holes is gravity waves, and I will describe gravity
wave experiments being planned to search for traces of the formation
of such black holes.
The transcript and downloadable versions of the lecture are available from the Gresham College website: http://www.gresham.ac.uk/lectures-and...
Gresham
College has been giving free public lectures since 1597. This tradition
continues today with all of our five or so public lectures a week being
made available for free download from our website. There are currently
over 1,900 lectures free to access or download from the website.
Website: http://www.gresham.ac.uk
Twitter: http://twitter.com/GreshamCollege
Facebook: https://www.facebook.com/greshamcollege
Instagram: http://www.instagram.com/greshamcollege
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