LIGO

The workings of the Universe.
Christopher K.
Posts: 5482
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: LIGO

Post by Christopher K. »

LIGO got through the Great Flood just fine, but BRAS decided to cancel it's members-only cookout for last month as many in the area had their lives thrown into disarray.

Christopher K.
Posts: 5482
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: LIGO

Post by Christopher K. »

Gravitational wave astronomy is here! It should come as no surprise that the January Astronomy includes the LIGO mission in its top ten stories of 2016. Professional (and I guess amateur) astronomers are hoping for established space-based gravitational wave searching by at least 2037.

Needless to say, the LIGO success will be mentioned in the annual "Space Year in Review" presentation at HRPO. As always, the presentation is the first of the Friday Night Lecture Series after our return from holidays in December. "2016--The Space Year in Review" will take place on Friday 6 January at 7:30pm. The talk has no admission fee and is for a general adult audience.

More information:
January 2016 Astronomy, p. 25.

Christopher K.
Posts: 5482
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: LIGO

Post by Christopher K. »

Professor Ron Drever, co-founder of LIGO, has died at the age of eighty-five. He had been suffering from demetia.

Drever helped develop the Pound-Drever-Hall laser stabilization method. He was a winner of the Kavli Prize, the Shaw Prize and the Gruber Prize.

More information:
http://www.caltech.edu/news/caltech-mou ... ever-54336

Christopher K.
Posts: 5482
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: LIGO

Post by Christopher K. »

LIGO's monthly open house takes place on Saturday the 15th from 1pm to 5pm. The theme is "Reflecting Science". Members of the Baton Rouge Astronomical Society will be on hand to describe their decades-old science hobby club.

fred8615
Posts: 282
Joined: October 12th, 2009, 12:29 pm
Location: Sorrento, LA

Re: LIGO

Post by fred8615 »

LIGO Detects Gravitational Waves From Another Neutron Star Merger

For just the second time, physicists working on the Laser Interferometer Gravitational-Wave Observatory (LIGO) have caught the gravitational waves of two neutron stars colliding to likely form a black hole.

The ripples in space time traveled some 500 million light-years and reached the detectors at LIGO, as well as its Italian sister observatory, Virgo, at around 4 a.m. E.T. on Thursday, April 25. Team members say there’s a more than 99 percent chance that the gravitational waves were created from a binary neutron star merger.

Read more: http://blogs.discovermagazine.com/d-bri ... ar-merger/
Frederick J. Barnett
"Someone's got to take the responsibility if the job's going to get done!! Do you think that's easy?!" Gregory Peck - The Guns Of Navarone

fred8615
Posts: 282
Joined: October 12th, 2009, 12:29 pm
Location: Sorrento, LA

Re: LIGO

Post by fred8615 »

MISMATCHED BLACK HOLES MERGE

For the first time, the LIGO and Virgo gravitational-wave detectors have “heard” gravitational waves from an unequal pair of black holes.

Scientists working with the LIGO and Virgo gravitational-wave observatories have detected an oddball event: the merger of two black holes of notably different sizes. All 10 black hole mergers detected in the first two observing runs had binary components with similar masses. But the new event, called GW190412, involved objects of about 8 and 30 solar masses, respectively. This asymmetry made the “hum” of overtones in the gravitational waves clear for the first time, enabling researchers to narrow in on the binary’s properties.

Read more: https://skyandtelescope.org/astronomy-n ... les-merge/
Frederick J. Barnett
"Someone's got to take the responsibility if the job's going to get done!! Do you think that's easy?!" Gregory Peck - The Guns Of Navarone

Christopher K.
Posts: 5482
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: LIGO

Post by Christopher K. »

The June 2020 Reflector has a four-page article by Dave Tosteson; its thesis is that the event GW 170187 allowed us to understand many heavier elements of the Periodic Table may have originated in neutron star mergers.

More information:
https://www.ligo.org/detections/GW170817.php

fred8615
Posts: 282
Joined: October 12th, 2009, 12:29 pm
Location: Sorrento, LA

Re: LIGO

Post by fred8615 »

Quantum 'kick' on big object measured for 1st time ever

Quantum effects are pushing us around all the time, and we now have observational evidence of this somewhat disconcerting fact.

Researchers with the Laser Interferometer Gravitational-wave Observatory (LIGO) Scientific Collaboration have measured the tiny kick imparted to their exquisitely sensitive equipment by quantum fluctuations, a new study reports.

And that kick is indeed tiny, moving LIGO's 88-lb. (40 kilograms) mirrors just 10^-20 meters, the scientists found.

Read more: https://www.space.com/quantum-kick-meas ... irror.html
Frederick J. Barnett
"Someone's got to take the responsibility if the job's going to get done!! Do you think that's easy?!" Gregory Peck - The Guns Of Navarone

fred8615
Posts: 282
Joined: October 12th, 2009, 12:29 pm
Location: Sorrento, LA

Re: LIGO

Post by fred8615 »

Gravitational waves point scientists to elusive missing-link black hole

A new sound has joined the symphony of the universe as we hear it.

Since 2015, astrophysicists have been using gravitational-wave detectors to "hear" chirp-like signals and decode massive collisions that send subtle ripples across spacetime. Now, scientists have heard a new kind of sound, a fast, deep "bang" that could unlock even more cosmic secrets, according to new research from the Laser Interferometer Gravitational-wave Observatory (LIGO) and its European counterpart, Virgo.

"This is another first," Gabriela Gonzalez, a physicist at Louisiana State University and a member of the massive team behind the new research, told Space.com. "We never get tired of firsts."

After more than a year studying the strange new signal, dubbed GW190521, scientists think they know what caused it: the largest black-hole merger seen to date, resulting in a hitherto unseen intermediate-mass black hole.

Read more: https://www.space.com/black-hole-interm ... overy.html
Frederick J. Barnett
"Someone's got to take the responsibility if the job's going to get done!! Do you think that's easy?!" Gregory Peck - The Guns Of Navarone

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