Selaus oppiaineen mukaan kokoelmassa Pro gradu -tutkielmat ja diplomityöt sekä syventävien opintojen opinnäytetyöt (kokotekstit) Tähtitiede
Aineistot 1-19 / 19
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A Study of Astronomical Polarization, Polarimetric Observations and Polarimetry of Exoplanets
(15.05.2020)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. ...avoin -
Aktiivisten tähtien aikasarja-analyysi : Roihupurkaukset ja tähdenpilkut
(07.11.2022)M-sarjan kääpiötähdet ovat pääsarjan pienimpiä tähtiä. Ne voivat olla rakenteeltaan hyvin eksoottisia, mutta ovat silti hyvin yleisiä: jopa 75% kaikista Linnunradan tähdistä on M-kääpiöitä. Arvellaan, että jokaisen M-kääpiön ...avoin -
Constraining supernova progenitors with integral field spectroscopy
(03.11.2019)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 ...avoin -
Constraining the neutron star equation of state through mass and radius measurements
(23.11.2022)The equation of state of cold dense matter is not well known. The models for cold dense matter can be constrained through the measurement of neutron stars, as they are the densest directly observable objects in the universe. ...avoin -
Examining the symmetry of optical flares in blazars
(04.05.2019)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 ...avoin -
Exploring the Cosmic History of Star Formation, Metallicity Evolution, and Core-Collapse Supernova Rates
(11.04.2023)Research on star formation is essential for understanding galaxy evolution and the universe’s evolution. Astronomers can learn about star formation over time by observing core-collapse supernovae and determining their ...avoin -
Galaxy flows in cosmic filaments
(21.07.2021)In the universe galaxies are assembled into the cosmic web, consisting of voids, walls, galaxy clusters and filaments. Filaments are elongated matter flows connecting the clusters together. Because of the non-uniform matter ...avoin -
Globular Cluster Bimodality in Isolated Elliptical Galaxies
(Turun yliopisto, 05.06.2013)avoin -
Kvasaarien joukkoympäristöt
(04.08.2021)Tutkimuksissa analysoitiin kvasaarien lähiympäristöjen, joukkojen ja niiden galaksien ominaisuuksien välisiä korrelaatioita Sloan Digital Sky Surveyn (SDSS-IV, DR12, DR14Q) fotometrisen ja spektroskooppisen datan pohjalta. ...avoin -
Long-term light-curves of transient X-ray pulsars as a tool to study disk−magnetosphere interaction
(15.06.2022)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, ...avoin -
Magnetospheric truncation of an accretion disk around the unique X-ray pulsar GRO J1744-28
(Turun yliopisto, 18.09.2017)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 ...avoin -
Mass and radius constraints for neutron stars from pulse shape modeling
(11 / 2016)Neutron stars are the most compact directly observable objects. The matter inside a neutron star is at supranuclear densities. The equation of state (EOS) of neutron stars describes the properties of such dense matter. ...avoin -
Methane Detection Through Satellite Imaging: Analyzing and Comparing Methane Concentration in Turkmenistan and Finland
(30.05.2023)Remote sensing by satellites is a growing field of study and has been applied to environmental research, e.g., in detecting greenhouse gases such as methane. Methane has recently been a major concern for industry due to ...avoin -
Observational study of the type IIb supernovae 2017gkk and 2019gaf
(13.12.2022)Supernova (SN) is bright explosion of a star at the end point of stellar evolution. Supernova explosions caused by gravitational collapse of the core of the star are called core-collapse supernovae (CCSNe), which can be ...avoin -
Simulations of Wave Propagation and Wave–wave Interactions in the Solar Corona and Solar Wind
(17.06.2021)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 ...avoin -
Solar Energetic Particles and their Measurement with Space Borne Instruments
(07.07.2021)The study of our Sun and its various modes of activity is an important area of research in the field of space physics and heliophysics. These active phenomena such as solar flares and Coronal Mass Ejections are associated ...avoin -
Spectral properties of accreting millisecond pulsars obtained with the Comptonization model COMPPS
(27.04.2022)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 ...avoin -
Symplektisen integroinnin soveltaminen satelliittien suhteellisten ratojen laskemiseen
(Turun yliopisto, 07.10.2009)Maapalloa kiertävien satelliittien liikkeet toistensa suhteen eli satelliittien suhteelliset radat ovat keskeisessä asemassa satelliittimuodostelmien kannalta. Suhteellisten ratojen ratkaiseminen maapallon potentiaalikentässä ...avoin -
Very High Energy Gamma-Rays emitting BL LAC's Population Study
(Turun yliopisto, 16.09.2014)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 ...avoin
