Alina Hirschmann

Autonomous University of Barcelona | UAB

SN2011fe was detected by the Palomar Transient Factory on August 24th 2011 in M101 few hours after the explosion. From the early spectra it was immediately realized that it was a Type Ia supernova thus making this event the brightest one discovered in the last twenty years. In this paper the observations performed with the instruments on board of I...

SN2011fe (RA = 14:03:05.81, Dec = +54:16:25.4; J2000) is a Type Ia supernovae that was discovered in M101 on August 24th 2011, by the Palomar Transient Factory (Nugent et al, ATEL #3581) and probably exploded on August 23 (16:29) 2011 (Nugent et al 20119. The maximum of the blue-band light curve was reached on JD 2455815.3 or IJD 4270.8, about 18 d...

SN2011fe (RA = 14:03:05.81, Dec = +54:16:25.4; J2000) is a Type Ia supernovae that was discovered in M101 on August 24th 2011, about one day after the explosion by the Palomar Transient Factory (Nugent et al, ATEL #3581). The optical maximum was reached around September 10th-11th. The prospected gamma-ray emission maximum in radioactive decay lines...

There is a wide consensus that Type Ia supernovae are the outcome of the thermonuclear explosion of a carbon-oxygen white dwarf in a binary system. Nevertheless, the nature of this system, the process of ignition itself and the development of the explosion continue to be a mystery despite the important improvements that both, theory and observation...

The explosion mechanism associated with thermonuclear supernovae (SNIa) is still a matter of debate. Nevertheless, there is a wide agreement that large amounts of radioactive nuclei are produced during these events, which are expected to be strong γ-ray emitters. In this paper we investigate the usability of these γ-rays as a diagnostic tool. For t...

The explosion mechanism associated with thermonuclear supernovae is still a matter of debate. Since huge amounts of radioactive elements are synthesized during such explosions, it is possible to use the associated γ-ray emission as a diagnostic tool. In this paper we show, however, that for some values of the parameters that characterize the burnin...

Type Ia supernovae are thought to be the outcome of the thermonuclear explosion of a carbon-oxygen white dwarf in a close binary system. In this review we discuss the observational background, the possible progenitors, the mechanisms leading to the instability and the development of the explosion itself as well as the remaining uncertainties.

The explosion mechanisms of type Ia supernovae are still a matter of debate. These events occur when a white dwarf, belonging to a binary system, accretes enough mass from its companion star and reaches the Chandrasekhar mass limit. Many theoretical approaches have been proposed although, unfortunately, there are no observations sensitive enough to...

The explosion mechanism associated with thermonuclear supernovae (SNIa) is still a matter of debate. Nevertheless, there is a wide agreement that high amounts of radioactive nuclei are produced during these events and that they are expected to be strong gamma-ray emitters. In this paper we investigate the use of this gamma-rays as a diagnostic tool...

The explosion mechanism associated with thermonuclear supernovae (SNIa) is still a matter of debate. Nevertheless, there is a wide agreement that high amounts of radioactive nuclei are produced during these events, that are expected to be strong γ-ray emitters. In this paper we investigate the use of γ-rays as a diagnostic tool. For this purpose we...

The explosion mechanisms of Type Ia Supernovae are still a matter of debate. These events occur when a white dwarf, belonging to a binary system, accretes enough mass from its companion star and reaches the Chandrasekhar mass limit. Many theoretical approaches have been proposed although, unfortunately, there are no observations sensitive enough to...

Explosions of novae and type la supernovae occur on accreting white dwarfs. As a consequence of the explosion, many radioactive nuclei are synthesized, which emit gamma-rays when decaying. Models of the gamma-ray emission of novae and type la supernovae are presented, together with their prospects for detectability with present (INTEGRAL) arid futu...

The light curves of Type Ia Supernovae (SN Ia) are powered by gamma-rays emitted by the decay of radioactive elements such as $^{56}$Ni and its decay products. These gamma-rays are downscattered,absorbed, and eventually reprocessed into the optical emission which makes up the bulk of all supernova observations. Detection of the gamma-rays that esca...

A 3D Monte Carlo code has been built to simulate the gamma ray emissions during Type Ia supernova explosions in order to properly take into account departures from symmetry. A 3D Delayed Detonation (DDT) model has been used as input for the simulation results presented further ahead. Two calculations of gamma ray emission were carried out: one taki...

The charge decay characteristics of Martian soil simulant are presented. The decay is non-ohmic as seen from experimental measurements of the current-voltage curves. Additional information is contained in the original extended abstract.

Studies of the voltage (charge) decay behavior of the JSC Mars-1 Martian Regolith simulant are presented for both moist and dry conditions in a simulated Earth/Mars environment. The results indicate that moisture content is the main driving force behind the form of the decay curve as well as temperature while atmospheric content and pressure play a...