Galaxies


A Voorwerpish Comic


Posted By on Aug 20, 2010

Sometimes, as an astronomer, I get to do some really weird stuff. This summer is one of those times. I actually, thanks to project PI (i.e. lead) Bill Keel, got an opportunity to help produce a comic book telling the story of how a Dutch school teacher found the light echo of a once bright Quasar. Light echos, like sound echos, for when waves (in this case light waves) bounce of a surface and reflect back to an observer, arriving...

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The (Galaxy Zoo) Keepers of the Data


Posted By on Jan 15, 2008

Last week I had a fabulous opportunity to sit down and talk with Galaxy Zookeepers Jordan Raddick and Chris Lintott. Here is the audio from our conversation – Enjoy! Star Stryder: An Interview with Zookeepers [Mp3 – 13.8 Mb] As you may have periodically read in this blog, I’m currently working on a project that is going to require a lot of work with the Sloan Digital Sky Survey (SDSS – the online catalogue...

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I just had the strangest realization. Stepping into the Galaxy Evolution session of oral presentations I got to listen to the AstroPixie present her research. Like me, she is a UT person (I got my PhD, she is getting her PhD). I knew that. What I didn’t know is we both have/had one of the same dissertation advisors: Gary Hill (I also worked with John Kormendy. What a strange small field it is. Galaxies began to form just a few...

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Making a Milky Way


Posted By on Jan 8, 2008

According to research presented by Eric Gawiser of Rutgers University, ancestors of Milky Way (MW) like galaxies appear to be Lyman Alpha emitting galaxies. These progenitors were about 1/10th the size of the MW, 1/20th the mass of the MW, and 1/40th the stellar mass of the MW (the rest of the mass is gas and dust – the stars are still forming). (image left of Lyman Alpha galaxy, credit: NASA, ESA, Caryl Gronwall/Penn State)...

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Blue Blobs – Splat on the sky


Posted By on Jan 8, 2008

Duilia deMello of the Catholic University of America and NASA Goddard is presenting in the afternoon galaxies press conference. I’m in here reporting while Rebecca edits, and Phil and Fraser are listening to the NASA town hall meeting. In peering around the universe we tend to stumble across a lot of weird small stuff. Blobs of gas. Blobs of stars. Blobs. Ever find some mysterious blob on your kitchen counter? You know something...

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Galaxies in the Mist


Posted By on Nov 29, 2007

[warning Will Robinson: the voices in my head that used to help write Slacker Astronomy are forcing me to write in the genre of a sensationalized nature special] One of the most elusive creatures speculated to lurk within the sky are the mysterious very high-redshift Lyman alpha emission galaxies. These systems, without the metal found in their more common and larger low-redshift cousins, are rich in hydrogen and slow in producing...

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