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New observational constraints on f(T) gravity through gravitational-wave astronomy [PDF]

open access: greenPhysical Review D, 2018
We investigate the new observational constraints on $f(T)$ gravity that arise from the effects of primordial gravitational waves (GWs) on the cosmic microwave background (CMB) anisotropies and the BB spectrum. We first show that on the GWs propagation in
Rafael C. Nunes   +2 more
openalex   +3 more sources

COSMICA: A Novel Dataset for Astronomical Object Detection with Evaluation Across Diverse Detection Architectures [PDF]

open access: yesJournal of Imaging
Accurate and efficient detection of celestial objects in telescope imagery is a fundamental challenge in both professional and amateur astronomy. Traditional methods often struggle with noise, varying brightness, and object morphology.
Evgenii Piratinskii, Irina Rabaev
doaj   +2 more sources

Astronomy Lab I: Photometric Experiments for Physics Students [PDF]

open access: yesIranian Journal of Astronomy and Astrophysics, 2023
As physics laboratories are an integral part of the physics education across the globe, astronomy laboratories are also a necessary part of the astronomy education.
Reza Rezaei
doaj   +1 more source

REQUIEM-2D: A Diversity of Formation Pathways in a Sample of Spatially Resolved Massive Quiescent Galaxies at z ∼ 2

open access: yesThe Astrophysical Journal, 2023
REQUIEM-2D (Resolving Quiescent Magnified Galaxies with 2D Grism Spectroscopy) comprises a sample of eight massive ( ${\rm{log}}({M}_{\ast }/{M}_{\odot })\gt 10.6$ ) strongly lensed quiescent galaxies at z ∼ 2.
Mohammad Akhshik   +18 more
doaj   +1 more source

Optical Polarimetry in Undergraduate Education [PDF]

open access: yesEPJ Web of Conferences, 2019
Polarimetry plays an important part in observational astronomy, but it is all too often given limited attention in astronomy textbooks. Coupled with a sometimes confusing mathematical introduction, students may feel that polarization is a difficult ...
Topasna Gregory
doaj   +1 more source

Perspectives for multi-messenger astronomy with the next generation of gravitational-wave detectors and high-energy satellites [PDF]

open access: yesAstronomy & Astrophysics, 2022
The Einstein Telescope (ET) is going to bring a revolution for the future of multi-messenger astrophysics. In order to detect the counterparts of binary neutron star (BNS) mergers at high redshift, the high-energy observations will play a crucial role ...
S. Ronchini   +8 more
semanticscholar   +1 more source

A Nondetection of Iron in the First High-resolution Emission Study of the Lava Planet 55 Cnc e

open access: yesThe Astronomical Journal, 2023
Close-in lava planets represent an extreme example of terrestrial worlds, but their high temperatures may allow us to probe a diversity of crustal compositions.
Kaitlin C. Rasmussen   +19 more
doaj   +1 more source

Solving the Traveling Telescope Problem with Mixed-integer Linear Programming

open access: yesThe Astronomical Journal, 2023
The size and complexity of modern astronomical surveys has grown to the point where, in many cases, traditional human scheduling of observations are tedious at best and impractical at worst.
Luke B. Handley   +2 more
doaj   +1 more source

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