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The Starving Ellipticals of Fossil Groups
(Turun yliopisto, 2018-09-05)
Fossil Groups (FGs) are unique galaxy systems with extensive X-ray halos and large magnitude gaps between members. It has been theorized that they are old and dynamically relaxed systems formed by multiple galaxy mergers. ...
Late-time near-infrared evolution of the ejecta and the equatorial ring of Supernova 1987A
(Turun yliopisto, 2018-05-23)
Supernova 1987A, located 50 kpc away in the Large Magellanic Cloud, is the closest supernova (SN) observed in the time of modern astronomy. The circumstellar medium of SN 1987A is characterised by a system of three rings ...
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 ...
Inconsequential Dense Regions and Enhanced Star Formation in Quasar Host Galaxies in the Galaxy and Mass Assembly (GAMA) Survey
(2020-01-10)
Quasars (QSOs) are the brightest objects in the known universe which radiate across the electromagnetic spectrum. They are active nuclei of galaxies that have super- massive black holes (SMBH) at their center. It is believed ...
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. ...