Hae
Aineistot 11-20 / 42
Observational studies of accreting X-ray pulsars in a broad energy range
(Turun yliopisto, 2022-11-04)
Among all interesting astrophysical objects in the universe, only a few are capable of improving our understanding of physics under extreme conditions. Accreting neutronstars are one of these objects. These compact objects ...
X-ray bursts as a tool to constrain the equation of state of the ultra-dense matter inside neutron stars
(Turun yliopisto, 2017-12-15)
Neutron stars are one of the most dense objects in the Universe. However, the exact description of the equation of state (EoS) of the cold ultra-dense matter inside them is still a mystery. In this thesis, we measure the ...
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 ...
Near-infraread observation of supernovae with the Nordic Optical Telescope (NOT)
(Turun yliopisto, 2016-06-15)
Supernova (SN) is an explosion of a star at the end of its lifetime. SNe are classified to two types, namely type I and II through the optical spectra. They have been categorised based on their explosion mechanism, to core ...
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 ...
Environments of Active Galaxies
(Turun yliopistoAnnales Universitatis Turkuensis A I 447, 2012-11-10)
This dissertation presents studies on the environments of active galaxies.
Paper I is a case study of a cluster of galaxies containing BL Lac object RGB
1745+398. We measured the velocity dispersion, mass, and richness ...
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, 2017-05-24)
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 ...
Flux decay during thermonuclear X-ray bursts: Decay rate analysis with the dynamic power-law index method
(Turun yliopisto, 2017-06-07)
The cooling of type-I X-ray bursts can be used to probe the nuclear burning conditions in neutron star envelopes.The flux decay of the bursts has been traditionally modelled with an exponential, even if theoretical ...