Michele Vallisneri's

Who I am

Theoretical physicist at NASA

Gravitational-wave science across the spectrum

  • Applying Bayesian methods to detect GWs and derive timing solutions with pulsar timing arrays.
  • Computing accurate signal models and designing effective search strategies for GWs from compact binaries and other sources.
  • Characterizing the extraction of physical information from GW signals.
  • And much more...

What is new

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Pulsar-timing arrays will detect gravitational waves from supermassive black hole binaries. When?

I'm happy to report that the Astrophysical Journal just published a letter authored by our JPL/Caltech pulsar-timing group, in which we discuss how soon gravitational waves from the cosmic population of supermassive black holes could be detected by radio telescopes. We conclude that, notwithstanding recent negative results from the Parkes Pulsar Timing Array, we expect to have clear and convincing evidence of low-frequency gravitational waves within the next decade.

Our article was featured on the JPL homepage and in a NASA press release, and it was discussed in a Gizmodo article by Jennifer Ouellette.


Celebrating the first observation of gravitational waves from a merging binary black hole.

In the 100th anniversary year of Einstein's prediction of gravitational waves, after a 50-year-long experimental pursuing, and after spending most of my scientific career devoting my personal effort to gravitational-wave science, I'm proud to join my voice to the chorus announcing and celebrating the first detection of gravitational waves from a binary system with LIGO.

I'm sure I will have more to say about this personally, but for the moment see LIGO's coverage, all the scientific papers, and the excellent articles in the New York Times and in the New Yorker.

I have been a member of the LIGO Scientific Collaboration since 2001, and it has been a privilege to witness (and help, if only modestly) the incredible improvement of the experiment, the growth of its community, and the exhilarating last few months of feverish work, culminating in today's announcement.

Update: I'm commenting on this news in Parma's Gazzetta, on Wired.com, and on the public radio show Blue Dot.


Announcing the public release of LIGO's best dataset yet.

LIGO just released the data taken by the project's two gravitational wave detectors during their flagship sixth science run (S6), which took place from July 2009 through October 2010. While no gravitational-wave events were found during this run, open-data releases pave the way toward the coming of age of gravitational-wave astronomy.

I am proud to be part of the LIGO Open Science Center (LOSC) that put together this data release, and prepared detailed metadata, tutorials, and software tools that will help non-LIGO users play and work with these data. Some such experiments are also featured in my Computational Salon lectures on elegant and efficient scientific computing.



© M. Vallisneri 2014 — last modified on 2014/10/27