Hae
Aineistot 11-20 / 22
Mass and radius constraints for neutron stars from pulse shape modeling
(2016-11)
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. ...
Kvasaarien joukkoympäristöt
(2021-08-04)
Tutkimuksissa analysoitiin kvasaarien lähiympäristöjen, joukkojen ja niiden galaksien ominaisuuksien välisiä korrelaatioita Sloan Digital Sky Surveyn (SDSS-IV, DR12, DR14Q) fotometrisen ja spektroskooppisen datan pohjalta. ...
Solar Energetic Particles and their Measurement with Space Borne Instruments
(2021-07-07)
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 ...
Galaxy flows in cosmic filaments
(2021-07-21)
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 ...
Constraining the neutron star equation of state through mass and radius measurements
(2022-11-23)
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. ...
Observational study of the type IIb supernovae 2017gkk and 2019gaf
(2022-12-13)
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 ...
UV and Optical Properties of 27 Tidal Disruption Events and Nuclear Transients
(2023-08-21)
I explore the UV/optical properties of 27 tidal disruption events (TDEs), TDE candidates and nuclear transients. Given their dependence on black holes, TDEs are expected to be able to probe quantities such as black hole ...
Exploring the Cosmic History of Star Formation, Metallicity Evolution, and Core-Collapse Supernova Rates
(2023-04-11)
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 ...
Aktiivisten tähtien aikasarja-analyysi : Roihupurkaukset ja tähdenpilkut
(2022-11-07)
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 ...
Methane Detection Through Satellite Imaging: Analyzing and Comparing Methane Concentration in Turkmenistan and Finland
(2023-05-30)
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 ...