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Aineistot 1-10 / 22
Constraining supernova progenitors with integral field spectroscopy
(2019-11-03)
Core-collapse supernovae (CCSNe) are an important part of the stellar evolution of massive stars. Certain types of supernova (SN) explosions are believed to originate from similar types of stars, but linking a SN type ...
Examining the symmetry of optical flares in blazars
(2019-05-04)
Blazars are one of the most energetic types of active galactic nuclei. They are luminous emitters that can be detected over the whole of the electromagnetic spectrum. They are radio-loud objects whose jet is closely aligned ...
A Study of Astronomical Polarization, Polarimetric Observations and Polarimetry of Exoplanets
(2020-05-15)
Astronomical polarization has become one useful tool to study a number of astronomical objects and related astrophysical mechanisms. The polarization of electromagnetic waves is caused by various astronomical phenomena. ...
Very High Energy Gamma-Rays emitting BL LAC's Population Study
(Turun yliopisto, 2014-09-16)
Context: BL Lacs are the most numerous extragalactic objects which are detected in Very High Energy (VHE) gamma-rays band. They are a subclass of blazars. Large flux variability amplitude, sometimes happens in very short ...
Spectral properties of accreting millisecond pulsars obtained with the Comptonization model COMPPS
(2022-04-27)
The neutron stars are unique objects to study properties of matter under extreme conditions. In fact, they are as dense as nuclear nuclei, at the same time they possess the highest magnetic fields in the Universe. Accreting ...
Symplektisen integroinnin soveltaminen satelliittien suhteellisten ratojen laskemiseen
(Turun yliopisto, 2009-10-07)
Maapalloa kiertävien satelliittien liikkeet toistensa suhteen eli
satelliittien suhteelliset radat ovat keskeisessä asemassa satelliittimuodostelmien kannalta. Suhteellisten ratojen ratkaiseminen maapallon potentiaalikentässä ...
Globular Cluster Bimodality in Isolated Elliptical Galaxies
(Turun yliopisto, 2013-06-05)
Magnetospheric truncation of an accretion disk around the unique X-ray pulsar GRO J1744-28
(Turun yliopisto, 2017-09-18)
Neutron stars are very massive yet compact objects, where both quantum mechanical and relativistic effects play a role. Many of them have magnetic fields which are many orders of magnitude stronger than what mankind can ...
Long-term light-curves of transient X-ray pulsars as a tool to study disk−magnetosphere interaction
(2022-06-15)
X-ray pulsars are highly magnetized neutron stars in close binary systems accreting matter from a normal companion star. Their strong magnetic fields channel the accreting matter onto the magnetic poles of the neutron star, ...
Simulations of Wave Propagation and Wave–wave Interactions in the Solar Corona and Solar Wind
(2021-06-17)
Several numerical methods, notably upwind schemes, Lax–Wendroff schemes, and a semi-Lagrangian scheme, are investigated in order to find suitable models to simulate Alfvén wave transport and evolution. The tools are assessed ...