The interaction of supernovae and pulsars with circumstellar environment

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6609687

Emmering, R T

In Chapter One, self-similar solutions for the time-dependent behavior of a shocked, spherically, symmetric, relativistic fluid with tangential magnetic field in the case where the boundaries of the shocked fluid move at a constant velocity are found. These solutions can be applied to the evolution of the shocked-relativistic pulsar winds which are probably observed as Crab-like supernova remnants. Since the models include time evolution, they can be applied to young objects and may be relevant to a possible pulsar nebular in SN1987a. In Chapter Two, the development of models for the infrared echo from Type II supernovae arising from the heating of circumstellar dust is discussed. In these models, ellipsoidial dust distributions are considered (previous models considered only spherically symmetric dust distributions) since some red supergiants, the likely progenitors of most Type II supernovae, are known to have asymmetric circumstellar envelopes. The models show that an asymmetric dust distribution can have a substantial effect on the time evolution of the echo. In Chapter Three, the properties to be expected of the infrared and scattered light echoes from SN1987A are derived. These echoes are expected to arise from the dust formed within the wind given off by the progenitor during a previous red supergiant phase. The models take into account the emission and scattering properties of the dust grains, in particular silicate dust grains, and the observed supernova light curve. The predictions of the models are compared with the available observations.

• Research Organization: Virginia Univ., Charlottesville, VA (USA)
• OSTI ID: 6609687
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BRIGHTNESS
COMPARATIVE EVALUATIONS
COSMIC DUST
COSMIC RADIO SOURCES
DUSTS
ELECTROMAGNETIC RADIATION
ENERGY RANGE
ERUPTIVE VARIABLE STARS
GIANT STARS
HEATING
INFRARED RADIATION
INTERACTIONS
MATHEMATICAL MODELS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PULSARS
RADIATIONS
RED GIANT STARS
RELATIVISTIC RANGE
SHOCK WAVES
STAR MODELS
STARS
STELLAR ACTIVITY
STELLAR WINDS
SUPERNOVA REMNANTS
SUPERNOVAE
TIME DEPENDENCE
VARIABLE STARS
VELOCITY