Plotting Astronomers July 22, 2010
Posted by sarah in: astro 2.0, science . 1 comment so far
(click to enlarge)
The Hertzsprung-Russell diagram is one of the fundamental plots in astronomy. I remember it being one of the very first “sciencey” things I learnt about astronomy. It’s a very elegant plot, as it relates two very basic quantities about stars, their temperature and their brightness, and presents a visually memorable picture. The main known classes of stars each, like white dwarfs or red giants, populate their own corner of the diagram.
And now Stuart has taken the HR diagram and made a human version of it: the Astronomer HR diagram! It’s very neat, and lots of astronomers have been figuring out where they would place on the plot. If I count my SPIE Proceedings papers, not strictly refereed but usually counted as such for intrumentalists, I’m at [17,4500], nicely along the Main Sequence. Counting just my very strictly peer-reviewed papers, I’m at [3,4500], in the new media section. Either’s fine by me!
Image: S. Lowe
AstroInformatics I: From Data to Knowledge June 23, 2010
Posted by sarah in: astro 2.0, astronomy . 1 comment so far
Optical layout of LSST, the catalyst for many semantic headaches
Like many sciences, astronomy is becoming increasingly data-rich. The next generation of observatories, such as the Large Synoptic Survey Telescope, will produce staggering amounts of data every night and push the subject into the petabyte regime. The large surveys that feed a substantial portion of the research community today, such as the Sloan Digital Sky Survey, are already demonstrating the difficulties of converting large datasets into knowledge: converting the data into catalogues, estimating selection biases and performing robust statistics are all common problems to those working with the data. Astroinformatics, or the science behind the information captured in our wealth of astronomical data, is therefore becoming an increasingly relevant field of study. The AstroInformatics 2010 conference was organised with the aim of essentially defining this emerging field.
AstroInformatics 2010 June 17, 2010
Posted by sarah in: astro 2.0, dotastronomy . Add a comment
The AstroInformatics 2010 conference is currently going on at Caltech in Pasadena. There’s a substantial online presence, if you can’t attend but want to take part in the discussion, here’s some links!
- The conference programme is here (times in Pacific time!)
- Follow the talks on Ustream
- Track the tweets (hashtag #astroinfo2010)
- Join in the discussion on the blog
More to follow!
Summer conferencing May 20, 2010
Posted by sarah in: astro 2.0 . 2commentsSummer is a busy season for conferencing, and some really interesting and fun meetings in the area of Open Science/Science Online/Science and Society are coming up in the next few months.
From 16 to 19 June, the California Institute of Technology will be hosting the 2010 edition of AstroInformatics, which looks excellent. The meeting has three days of “proper” conferencing, covering many topics – conceptual (changing paradigms in astronomy research, developments in other sciences) , technical (what are the newest tools for exploring, visualising and sharing data?) , people-based (astronomy education, citizen science). The 4th day is a workshop on astro-semantics. I’m really excited about the conference itself and about the trip as a whole – I’m well overdue a trip to the astronomy beehive/wasp’s nest (?) that is Pasadena, home to friends, colleagues and fellow bloggers. A tweetup may be in order – be warned.
Inconveniently clashing with AstroInformatics is the very cool-looking Science Hack Day in London on 19-20 June, hosted at the offices of the Guardian newspaper and sponsored by a bunch of great organisations. It’s a typical weekend of geekery with no real programme, just a bunch of coding-aficionados – and more than a few DotAstronomers, I couldn’t help but notice – getting together to Do Cool Stuff With Computers. I’m sorry to miss it, although I’m a little too technically incompetent to really contribute much. I always had the impression that biomedical scientists were much more active in participating in such events and it’s great to see that astronomers are getting seriously involved too – I spotted that LCOGT are even sponsoring the Hack Day.
I was also very happy to see the announcement of the 2010 instalment of Science Online London on 3-4 September. After last year’s fun and stimulating event at the Royal Institution in London, this year’s SOLo will take place in the British Library, who are cohosting the conference with Mendeley and Nature Publishing Group.There’s not much info yet on programme or fringe events, but if last year was anything to go by, it should be well worth attending.
Spreading Galaxies Gospel on Facebook April 11, 2010
Posted by sarah in: astro 2.0 . 7comments
Galaxy rotation curves: NOT flat (Noordermeer et al, 2007)
Paolo Salucci has a bone to pick with the community. The Trieste-based astronomer is fed up with his colleagues’ misconceptions about galaxy rotation curves and has decided to Do Something About It. In his short paper posted to astro-ph last Friday, he describes the experiment he’s set up to convince the world that galaxy rotation curves are not flat (oh sorry, that’s: NOT flat) – he has set up a Facebook group with plots, background, links and discussion, to orchestrate a change in the hearts and minds of astronomers around the world, to stamp out once and for all the damaging “hoax” of flat galaxy rotation curves.
Rotation curves describe how the rotation velocity in galaxies changes with increasing distance from the galactic centre. For spiral galaxies these curves are useful for learning about the galaxies’ matter distribution and, importantly, the presence of dark matter. But I’m not going to talk about rotation curves – it’s not my field and I’m happy to accept that they’re not flat.
