Some topics we talked about:
1. Astronomers found Type Ia SNe born differently in some elliptical galaxies than we originally thought. Read the Nature paper here.
2. Four dwarf galaxies relatively nearby (few hundred million light-years away), are in the process of merging, which usually happened billions of light-years away. Read the story here.
3. By studying the age and chemical properties of globular star clusters in our galaxy, astronomers believe at least a quart of star clusters are invaders from other galaxies. Read the story here.
4. Primitive stars have been found outside Milky Way galaxy. Read the news release here.
Sunday, February 28, 2010
Monday, February 15, 2010
Feb 10 Recap
This week's journal club was hosted by Michael Bietenholz. Some highlights were:
1. A numerical simulation shows that, even a galaxy like ours should host hundreds of intelligent civilizations, the civilizations like us are likely exist one at a time. Read the article here. If you like to know about the Rare Earth hypothesis mentioned in the article read the paper here.
2. "Seven-Year WMAP Results: No, They're NOT Anomalies", read the article here, or try your hand to find interesting patterns in WMAP here.
3. Radio astronomers have found a supernova explosion with properties similar to a gamma-ray burst, but without seeing any gamma rays from it. Read the press release here.
4. Astronomers in the Netherlands catch supernova, observe relativistic expansion. Read Nature paper here.
1. A numerical simulation shows that, even a galaxy like ours should host hundreds of intelligent civilizations, the civilizations like us are likely exist one at a time. Read the article here. If you like to know about the Rare Earth hypothesis mentioned in the article read the paper here.
2. "Seven-Year WMAP Results: No, They're NOT Anomalies", read the article here, or try your hand to find interesting patterns in WMAP here.
3. Radio astronomers have found a supernova explosion with properties similar to a gamma-ray burst, but without seeing any gamma rays from it. Read the press release here.
4. Astronomers in the Netherlands catch supernova, observe relativistic expansion. Read Nature paper here.
Wednesday, February 3, 2010
Feb 3 Recap
This week's journal club was hosted by Prof. Paul Delaney. Some of the topics we discussed were:
1. This week NASA announced their new budget plan. News stories about Constellation has been cancelled, and NASA gave the human spaceflight to 5 commercial companies. Read the details of NASA budget at its homepage.
2. Hubble Space Telescope caught a head-on collision between two asteroids. Read the news here.
3. "What else is out there?" appears in the March edition of Sky & Telescope, discussed about whether earth-size objects exist in the Kuiper Belt, and the detection of interstellar comets.
4. Study of W33A, a Massive Young Stellar Object (MYSO), shows that massive stars form in much the same way as in smaller stars. But planets is less likely to be formed around massive stars. Read the story here.
5. A stellar-mass black hole is found in a binary system in NGC300. It is the second most massive (15 solar masses), and the most far-away (outside the Local Group) stellar-mass black hole ever found. Its company is a Wolf-Rayet star. Read the story here.
1. This week NASA announced their new budget plan. News stories about Constellation has been cancelled, and NASA gave the human spaceflight to 5 commercial companies. Read the details of NASA budget at its homepage.
2. Hubble Space Telescope caught a head-on collision between two asteroids. Read the news here.
3. "What else is out there?" appears in the March edition of Sky & Telescope, discussed about whether earth-size objects exist in the Kuiper Belt, and the detection of interstellar comets.
4. Study of W33A, a Massive Young Stellar Object (MYSO), shows that massive stars form in much the same way as in smaller stars. But planets is less likely to be formed around massive stars. Read the story here.
5. A stellar-mass black hole is found in a binary system in NGC300. It is the second most massive (15 solar masses), and the most far-away (outside the Local Group) stellar-mass black hole ever found. Its company is a Wolf-Rayet star. Read the story here.
Sunday, January 31, 2010
Jan 27 Recap
This week's journal club was led by Prof. Pat Hall. Some highlights are
1. Gamma-ray telescopes show origins of cosmic rays. Fermi's first year observation shows evidence of the connection between SNe remnants and the acceleration of CR hadrons. Read the article here.
2. HARPS search for extra-solar planets around dwarf star GJ876, the radial velocity measurements indicate an Earth-mass size planet or smaller. Read the paper here.
1. Gamma-ray telescopes show origins of cosmic rays. Fermi's first year observation shows evidence of the connection between SNe remnants and the acceleration of CR hadrons. Read the article here.
2. HARPS search for extra-solar planets around dwarf star GJ876, the radial velocity measurements indicate an Earth-mass size planet or smaller. Read the paper here.
Thursday, January 21, 2010
Jan 20 Recap
This week's journal club was host by Michael De Robertis. Some highlights are following:
1. IYA 2009 officially came to a close on Jan 9th and 10th in Padua, Italy. Read the event here.
2. Pulsar watchers race for gravity waves. Radio telescopes use pulsars looking for massive cosmic collisions. Read the article here.
1. IYA 2009 officially came to a close on Jan 9th and 10th in Padua, Italy. Read the event here.
2. Pulsar watchers race for gravity waves. Radio telescopes use pulsars looking for massive cosmic collisions. Read the article here.
Sunday, January 17, 2010
Recap: Jan 13, 2010
The first astronomy journal club of this year was hosted by Alireza Rafiee. Some highlights are following:
1. A complex form of mathematical symmetry (E8) linked to string theory has been spot first time in laboratory experiments on exotic crystals. Read more here.
2. Kepler mission news: five new planets have been identified just using the first six week's science data. Read it here. Want to know the science of Kepler mission visit here.
1. A complex form of mathematical symmetry (E8) linked to string theory has been spot first time in laboratory experiments on exotic crystals. Read more here.
2. Kepler mission news: five new planets have been identified just using the first six week's science data. Read it here. Want to know the science of Kepler mission visit here.
Wednesday, December 2, 2009
Dec 2 Recap
This week's host is Prof. Paul Delaney.
1. LHC officially becomes the most powerful accelerator. Both proton beams were powered to 1.18 TeV, the speed of the protons are 0.9997 times the speed of light. Read the story here.,
2. Report from Cassini mission: the eccentricity of Saturn's orbit around the sun may be responsible for the unusually uneven distribution of lakes over the northern and southern polar regions of Titan. Read more here.
1. LHC officially becomes the most powerful accelerator. Both proton beams were powered to 1.18 TeV, the speed of the protons are 0.9997 times the speed of light. Read the story here.,
2. Report from Cassini mission: the eccentricity of Saturn's orbit around the sun may be responsible for the unusually uneven distribution of lakes over the northern and southern polar regions of Titan. Read more here.
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