astro

Category archives for astro

A Universe of Black Holes: V

We are back to “Massive Black Holes” Happy Birthday Alberto! Alberto Sesana (AEI) leads off with “Probing massive black holes with space-based interferometry and pulsar timing” starts with overview of gravitational radiation – characteristic frequencies, amplitudes, timescales Baby Black Holes – up for adoption, get collectible adoption certificates with a picture of your very own…

the Massive Black Holes workshop at KITP continues, with another Black Hole Pairs session Mike Eracleous kicks off: Observational Searches for Close Supermassive Binary Black Holes emission line signatures of close (~ sub-parsec) supermassive binary black holes cf “A Large Systematic Search for Recoiling and Close Supermassive Binary Black Holes” and “Emission Lines as a…

“Massive black hole pairs” is the topic of today’s session at the BHOLES13 workshop at KITP Talks are online here – note that slides of talks show up later as speakers get their act together and send in slides Monica Colpi (Milan) starts the session with Formantion of Binary Black Holes in Galactic Nuclei starts…

and we are back from lunch J. Johnson (LANL) talking about supermassive stars as seeds for supermassive black holes – going to be getting more technical supermassive star has a gas mass ~ 105 solar masses (as oppesed to few hundredish solar masses for standard Pop III stars that could provide low mass seeds) form…

A Universe of Black Holes: I

Visiting lovely KITP for the A Universe of Black Holes programme, and specifically the associated “Massive Black Holes: Birth, Growth and Impact” workshop. As usual the talks will (eventually) be posted on line, both slides and web, but in the mean time I will be semi-transcribing my semi-coherent stream-of-consciousness thoughts on the issues. And we…

Planck Result Perspective

Simon White Director of Max Planck Institut für Astrophysik giving today’s Physics Colloquium at ACP on the Planck Results Likely to be interesting, hence the semi-liveblog. Starts with description of the collaboration and historical perspective; Penzias and Wilson, COBE and WMAP Cute ESA video showing Planck science Even better ESA video explaining stuff Very good…

Life Is…

… a self-reproducing Turing Machine which can do work.

Weak Justifications

I am at a meeting at an undisclosed location, and concurrently the weak lensing folk are having a workshop on future surveys, so I am slumming at their sessions in my copious spare time. This morning Tony Tyson is leading a discussion on the technical aspects of the surveys, with LSST as the working example.…

A Champion of Change

Earlier this month I got an invitation to the White House. It was rather cryptic, asking me to attend an Event, today, followed by a reception in the Indian Treaty Room Regrettably, I had to decline, I was in Europe, and would only just be getting back. The logistics of getting to DC in time…

Over the next 10 years, what research done on bodies within our Solar System (measurements and theory) will be most important for informing our search for life beyond the Earth? This is the current topic posed as the Single Question on the Future of Astrobiology at the ongoing NASA Astrobiology Institute Roadmap online exercise. If…