EWASS 2012, Symposium 10:
This presentation is the property of its rightful owner.
Sponsored Links
1 / 20

The most powerful explosions in the Universe Genesis and evolution of Supernova and PowerPoint PPT Presentation


  • 65 Views
  • Uploaded on
  • Presentation posted in: General

EWASS 2012, Symposium 10: "30 years of Italian participation to ESO ”. The most powerful explosions in the Universe Genesis and evolution of Supernova and Gamma-Ray Burst Italian programs at ESO. Elena Pian - INAF, Trieste Astronomical Observatory. Supernovae.

Download Presentation

The most powerful explosions in the Universe Genesis and evolution of Supernova and

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


The most powerful explosions in the universe genesis and evolution of supernova and

EWASS 2012, Symposium 10:

"30 years of Italian participation to ESO”

The most powerful explosions in the Universe

Genesis and evolution of Supernova and

Gamma-Ray Burst Italian programs at ESO

Elena Pian - INAF, Trieste AstronomicalObservatory


The most powerful explosions in the universe genesis and evolution of supernova and

Supernovae

The detection of SN1987A boosted the Supernova research at ESO

In the 1990s, the ESO programs led by the Supernova group in Padova pioneered and developed the concept of Target-of-Opportunity on “unpredictable” sources


Diversity of snia

Diversity of SNIa

Absolute light curves of 87 SN Ia

m15(B)

No STD candles !!


Normal sne ia follow phillips relation

Normal SNeIa follow Phillips relation!

Pskovskii – Phillips relation

normal

Altavilla et al. 2004


The most powerful explosions in the universe genesis and evolution of supernova and

Photospheric velocities of SN Ia

.

v

Si II 6355Å velocity evolution

HVG 97 km/s/d

LVG 37 km/s/d

FAINT 87km/s/d

≈MB

≈MB+2

Benetti et al. 2005


Velocity gradient vs m 15

Velocity gradient vs. Δm15

HVG

Faint

LVG

Benetti et al. 2005


The most powerful explosions in the universe genesis and evolution of supernova and

orro diagram!

Applying density structure of W7

transform vexp(Si) in mass.

By adding it to the NSE mass,

we obtain a constant mass,

1.05±0.09 Msun , with NO

Dependence on m15(B)

SNe that produce less 56Ni

Synthesize more IME

X M (NSE+IME)

M (NSE)

M (56Ni)

M (54Fe + 58Ni)

~0.09Msol

~0.13Msol

Mazzali et al. 2007


The most powerful explosions in the universe genesis and evolution of supernova and

Gamma-Ray Bursts

28 February 1997:

BeppoSAX starts localizing GRBs with arcminute accuracy: the “GRB afterglow era” has started

~100 keV

About 250 GRBs have been followed up with ESO telescopes


The most powerful explosions in the universe genesis and evolution of supernova and

GRB970228: first detection of X-ray and opticalafterglow

NTT + SUSI, 13 March 1997

T0 + 21 hours T0 + 8 days

Van Paradijs et al. and the BeppoSAX

team 1997

T0 + 8 hours T0 + 3 days

BeppoSAXdetection of X-rayafterglow

Costa et al 1997


The most powerful explosions in the universe genesis and evolution of supernova and

GRB990510 (z = 1.6): optical afterglow

Lin. Pol. 1.7±0.2%

VLT+FORS

ESO NTT and 3.6m

The time decay is not a single power-law

Israel et al. 1999

Covino et al. 1999


The most powerful explosions in the universe genesis and evolution of supernova and

The optically brightest GRB

(z = 0.937)

(z = 6.29)

(z = 1.6)

Bloom et al. 2009


The most powerful explosions in the universe genesis and evolution of supernova and

GRB080319B: the robotic approach

REM+TORTORA

Racusin et al. 2008


The most powerful explosions in the universe genesis and evolution of supernova and

GRB080319B: VLT in Rapid Response Mode with UVES

Fe II λ2374

Fe II λ2396*

z = 0.937

Detection of variable absorption lines and identification of 6 absorbers in a velocity range of 100 km/s

D’Elia et al. 2009


The most powerful explosions in the universe genesis and evolution of supernova and

Metallicity of GRB host galaxies

VLT+X-shooter

Piranomonte et al. 2011


The most powerful explosions in the universe genesis and evolution of supernova and

25 April 1998:

Gamma-Ray Bursts meet Supernovae


The most powerful explosions in the universe genesis and evolution of supernova and

GRB980425

Supernova 1998bw (TypeIc)

z = 0.0085

Kineticenergy ~e52 erg


The most powerful explosions in the universe genesis and evolution of supernova and

Light Curves of GRB and XRF Supernovae at z < 0.3

Pian et al. 2006

Bufano et al. 2012

Melandri et al. 2012


The most powerful explosions in the universe genesis and evolution of supernova and

Photospheric velocities of Type IcSNe

Pian et al. 2006

Bufano et al. 2012


The most powerful explosions in the universe genesis and evolution of supernova and

Summary

A constant burned mass and a common explosion mechanism for Type Ia Supernovae: This may help in understanding their role as standard candles

GRB optical flashes and afterglows: Study of physics (photometry and multiwavelength comparison) and environments (spectroscopy)

GRB and XRF Supernovae: highly energetic Type IcSNe.

GRB SNe are more luminous than XRF SNe. Is this telling us something about progenitors and remnants?


The most powerful explosions in the universe genesis and evolution of supernova and

The Future

NTT Supernova Large Program

PI: S. Benetti

Public ESO Spectroscopic Survey for Transient Objects (PESSTO)

PI: S. Smartt, important Italian role with S. Benetti and S. Valenti

VLT FORS Type Ib/c and IIb Supernova program (late phase)

PI: P. Mazzali

VLT X-Shooter GTO TOO program (Denmark, France, Italy The Netherlands)

PI: J. Fynbo, Italian Co-PI: S. Covino

VLT X-Shooter GTO program on GRB host galaxies

PI: S. Piranomonte

VLT FORS GRB and X-ray Flash Supernova program

PI: E. Pian and M. Della Valle


  • Login