In this study, we develop a numerical method to generate images on an observer's screen,
formed by radiation from hot spots on any timelike orbits outside a black hole. This method …

Recently, spherical and static flat space solitons (balls) and self-gravitating, everywhere
regular, asymptotically flat solitons (stars) were constructed in an Einstein-Proca-Higgs …

In this paper, we investigate the shadows and rings of the charged Horndeski black hole
illuminated by accretion flow that is both geometrically and optically thin. We consider two …

In this work, we study spherically symmetric vacuum solutions in one-parameter new
general relativity (NGR), a specific theory in teleparallel gravity which is constructed from the …

In this work, we analyze the observational properties of static, spherically symmetric boson
stars with fourth and sixth-order self-interactions, using the Julia-based general-relativistic …

In this work we analyze the observational properties of relativistic fluid spheres when orbited
by isotropically emitting sources, known as hot spots. We consider fluid star configurations in …

We analyse the lensing images by dynamically robust rotating (mini-) Proca stars
surrounded by thin accretion disks. Due to their peculiar geodesic structure we show that …

In this study, we investigated the optical properties of charged black holes within the Einstein-
Maxwell-scalar (EMS) theory. We evaluated the shadow cast by these black holes and …

In this work, we analyze the observational properties of thin-shell gravastars under two
astrophysical frameworks, namely surrounded by optically thin accretion disks and orbited …

We investigate static boson star solutions in the so-called Einstein-Friedberg-Lee-Sirlin (E-
FLS) theory and perform a complete analysis of the solution space in this model. We study …