day_14 - October 4 2010 Exam 2 back Wednesday Movie on...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
October 4, 2010 Exam 2 back Wednesday, Movie on Supernovae Friday Reading Chapter 7 Astronomy in the News? Possible planet, Gleise581g, in the liquid water habitable zone of planet of 3-4 Earth masses. 20 Light years away toward Libra. Dim red host star. 37 day orbit, 4 million miles. One of 6 planets. Tidally locked. Dim stars good search targets first pointed out by John Scalo. NASA funding passes Congress – kill Moon program, aim for an asteroid or Mars, less $ for new technology, need new heavy lift rocket. Pic of the Day – Panorama of Mars
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Goal – to understand the nature of a new class of super-luminous supernovae
Background image of page 2
A New Type of Supernova A New Type of Supernova By far the most dramatic discovery by Robert Quimby and the Texas Supernova Search was a whole new class of “super- luminous” supernovae, of order 10 to 100 times brighter than the classical types. SN 2005ap SN 2006gy SN 2006tf SN 2008es SN 2008am (Manos working on this now)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
SN 2006gy SN 2006gy The first to get major press was SN 2006gy Rose to maximum in 70 days (1 to 2 weeks is typical) => large mass involved ~100 times brighter than normal Slower decline Rich spectrum, characterized by broad, intermediate, and narrow lines of Hydrogen, a Type II, but of a sort never seen before Detailed analysis showed that SN 2006gy had to arise from a very massive star, ~100 solar masses
Background image of page 6
SN 2006gy Explosion of a white dwarf quickly ruled out. Role for massive star progenitors, perhaps luminous blue variables like Eta Carinae JCW proposed that it was yet a different kind of explosion, proposed theoretically 40 years ago, more recently hypothesized to occur among the first stars ever formed in the Universe, but never seen. A Pair-Formation Supernova
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 19

day_14 - October 4 2010 Exam 2 back Wednesday Movie on...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online