Explosions in the sky

@fedhere Federica B. Bianco University of Delaware LSST Science Collaborations
Explosions in the sky

@fedhere

@fedhere 1572 SN Tycho in Scania, Denmark, Tycho Brahe ﬁrst
observed a "new star" on November 11, 1572. From Flammarion's Astronomie Populaire (1880)

@fedhere (possibly) supernova of A.D. 1006 and the constellation Scorpius
White Tanks Regional Park, Phoenix, AZ. SN1006

@fedhere In the 2nd year of the epoch Zhongping, the
10th month, on the day Kwei Hae [December 7, Year 185], a 'guest star' appeared in the middle of Nan Mun [Alpha Centauri], The size was half a bamboo mat. It displayed various colors, and gradually lessened. In the 6th month of the succeeding year it disappeared. [4] 《後漢漢書·卷⼗十⼆二·天⽂文下》："中平⼆二年年⼗十⽉月癸亥，客星出南⾨門中，⼤大如半筵，五⾊色喜怒怒稍⼩小，⾄至後年年六⽉月消。占⽈曰：‘為兵。’⾄至六年年，司隸校尉袁紹誅滅中官，⼤大將軍部曲將吳匡攻殺⾞車車騎將軍何苗，死者數數千⼈人。" SN 185

@fedhere SN 185 In the 2nd year of the epoch
Zhongping, the 10th month, on the day Kwei Hae [December 7, Year 185], a 'guest star' appeared in the middle of Nan Mun [Alpha Centauri], The size was half a bamboo mat. It displayed various colors, and gradually lessened. In the 6th month of the succeeding year it disappeared. [4]

@fedhere 10 stars explode every second A. Connolly, TED talk

@fedhere 1 Stars have lives! They are born, they grow
old, and they die

@fedhere

@fedhere gravity is pushing the star inward

@fedhere gravity is pushing the star inward Nuclear reactions push
the star outward

the star outward H->He->C->N->O->…Fe Hydrostatic equilibrium

the star outward

@fedhere 2 Just like stars in Hollywood : the biggest
stars live fast and die young and spectacularly

@fedhere high initial mass low initial mass low mass….. boring
death by cooling down

@fedhere high initial mass High mass….. Explosive death!

@fedhere high initial mass low initial mass but in a
multiple system Low mass binaries….. Explosive death!

@fedhere Reasons to study Supernovae umbnails/image/g299.jpg

@fedhere Reason I to study Supernovae umbnails/image/g299.jpg natures ﬁreworks that
leave awesome remnants!

@fedhere “The nitrogen in our DNA, the calcium in our
teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff.” ― Carl Sagan, Cosmos Reason II to study Supernovae we are made of star dust

@fedhere they are different and mostly we don’t know why
Reason III to study Supernovae

@fedhere SN 2011dh, M51 vanDyk et al. 2011

@fedhere “the SN progenitor problem”

@fedhere Wavelength SN observables time https://www.youtube.com/watch?v=alAQqzlB-O8

@fedhere We can see them really far away, and they
are are really good at telling us about how the Universe works Reason IV to study Supernovae

@fedhere 3 The Universe is expanding

@fedhere everything is getting farther away from everything

@fedhere Doppler effect

@fedhere If we know the frequency, then we can measure
how fast its moving Doppler effect low light frequency (red) High light frequency (blue) Redshift

@fedhere If we know how bright, then we can measure
how far

@fedhere time luminosity A special type of Supernova: SN Ia
S. Perlmutter, A.Reis, B. Schmidt

@fedhere time luminosity Rest+ 2014 A special type of Supernova:
SN Ia Luminosity <-> DISTANCE Redshift <-> VELOCITY

@fedhere The Universe is expanding

@fedhere 4 The Universe is expanding Faster and Faster!

@fedhere Stellar explosions rule!!

Explosions in the sky

Explosions in the sky

More Decks by federica

Other Decks in Science

Featured

Transcript