Wednesday, April 25, 2018

Burst 30 - The Gaia DR2 Release and Boyajian's Star



Released: 24 April 2018
Duration: 10 minutes, 1 second

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Paul Carr talks about today's much more accurate distance estimate to Boyajian's Star from Gaia Data
Release 2, and what, if anything, this rules out.

Links:

Clemens+ (2018) - Proper Motion of the Faint Star near KIC 8462852 (Boyajian's Star) - Not a Binary System
Boyajian+ (2015) - Where's the Flux?
Interview with Brad Schaefer
Ben Montet Makes a Star Weirder
Castelaz and Barker (2018) - KIC 8462852: Maria Mitchell Observatory Photographic Photometry 1922 to 1991
Gaia DR2

Credits:

Host and Producer: Paul Carr
Music: Jason Robinson


Monday, April 23, 2018

Burst 29 - Caral Supe and Evangeline


Released: 23 April 2018
Duration:12 minutes, 21 seconds

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Los Cumbres light curve from www.wherestheflux.com


Paul Carr reviews what has been happening over the Winter and early Spring with respect to Boyajian's Star. We review the Winter observations, the Castelaz and Barker paper, and the two surprise March dips, Caral-Supe and Evangeline. We also talk about the upcoming Gaia Data Release 2 and what it might mean.

Links

Burst 24 and Burst 25
KIC 8462852: Maria Mitchell Observatory Photographic Photometry 1922 to 1991
Where's The Flux?
Bruce Gary's Boyajian's Star Page
Boyajian's R
Gaia DR2

Credits

Host and Producer: Paul Carr
Music: Jason Robinson


Tuesday, February 6, 2018

Burst 28 - The Cosmic Archipelago, part III



Released: 6 February 2018
Duration: 24 minutes, 48 seconds

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A hundred years ago cosmologists were struggling to understand the nature and structure of the universe, and at the heart of this struggle was the island universe hypothesis. Today we find ourselves confronted with a similar question posed at a far greater scale. In order to resolve our cosmic archipelago problem we will have to attempt to reconstruct a history of our universe as a part of a far larger cosmological system, and to do this we will have to extend cosmology beyond the observable universe -- but what, exactly, is the observable universe?

Supernova iPTF14hls
Przybylski's Star

Credits:

Writer and Host: Nick Nielsen
Producer and Announcer: Paul Carr
Music: by kind permission of the artist, Jason Robinson

The Wow! Signal is distributed under the Creative Commons Attribution/Share-Alike license.


Thursday, January 25, 2018

Burst 27 - The Cosmic Archipelago - Part 2



Released: 25 January 2018
Duration: 21 minutes, 51 seconds
The geologic time spiral

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The Cosmic Archipelago, part 1.

A hundred years ago cosmologists were struggling to understand the nature and structure of the universe, and at the heart of this struggle was the island universe hypothesis. Today we find ourselves confronted with a similar question posed at a far greater scale. As we confront these great questions of cosmology, whether a hundred years ago or today, we find ourselves faced with as many philosophical questions as scientific questions when we challenge the boundaries of our understanding. In Part II we focus on cosmological scales of time and what this means for human observation of a very old universe.

Links:

The Scale of the Universe, Shapley and Curtis

Credits:

Writer and Host: Nick Nielsen
Voiceover and Producer: Paul Carr
Music: Jason Robinson


Sunday, January 21, 2018

Burst 26 - The Cosmic Archipelago, Part 1.



Released: 21 January 2018
Duration: 19 minutes

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Henrietta Swan Leavitt,
discoverer of Leavitt's Law


A hundred years ago cosmologists were struggling to understand the nature and structure of the universe, and at the heart of this struggle was the island universe hypothesis.
Today we find ourselves confronted with a similar question posed at a far greater scale. As we confront these great questions of cosmology, whether a hundred years ago or today, we find ourselves faced with as many philosophical questions as scientific questions when we challenge the boundaries of our understanding. In Part I we focus on the original problems of constructing the cosmological distance ladder.

Links:

The Scale of the Universe, Shapley and Curtis

 

Credits:

Writer and Host: Nick Nielsen
Producer and Voiceover: Paul Carr
Music: Jason Robinson


Sunday, December 31, 2017

Episode 38 - The Overview Effect



Released: 31 December 2017
Duration: 65 minutes, 20 seconds

Direct download of audio .mp3 file

Daniela DePaulis and Nick Nielsen in conversation with Frank White on the Overview Effect.

Detailed show notes To Be Supplied.

The Wow! Signal is distributed under the Creative Commons Attribution/Share-Alike license.