Results 11 to 20 of about 2,827,182 (371)

Astronomy: A conversation about observation [PDF]

open access: bronzeNature, 2012
In the spirit of the Lindau Meeting, we present a dialogue between a Nobel laureate and a young researcher. This interchange started online, where it continues to unfold. Here is a digest of this conversation, which has developed across time and space.
John Mather, Minnie Mao
openalex   +4 more sources

Observational Molecular Astronomy: Exploring the Universe Using Molecular Line Emissions

open access: yes, 2013
Molecular line emissions offer researchers exciting opportunities to learn about the evolutionary state of the Milky Way and distant galaxies. This text provides a detailed introduction to molecular astrophysics and an array of useful techniques for observing astronomical phenomena at millimetre and submillimetre wavelengths.
David A. Williams, S. Viti
semanticscholar   +2 more sources

Diffraction-dominated observational astronomy [PDF]

open access: green, 2019
36 pages, 26 figures, based on a lecture given at the 2017 edition of the Evry Schatzman school, dedicated to the high-angular resolution imaging of stars and their direct ...
Frantz Martinache
openalex   +3 more sources

Observational constraints on dark matter scattering with electrons [PDF]

open access: yesPhysical Review D, 2021
David Nguyen, Dimple Sarnaaik, Kimberly K. Boddy, Ethan O. Nadler, 4, 1 and Vera Gluscevic Department of Physics & Astronomy, University of Southern California, Los Angeles, CA, 90007, USA Department of Physics, University of Texas at Austin, Austin, TX,
David Nguyen   +4 more
semanticscholar   +1 more source

MeerKAT Holography Measurements in the UHF, L, and S Bands

open access: yesThe Astronomical Journal, 2023
Radio holographic measurements using the MeerKAT telescope are presented for each of its supported observing bands, namely UHF (544–1087 MHz), L (856–1711 MHz), and S (1750–3499 MHz).
Mattieu S. de Villiers
doaj   +1 more source

GECAM Localization of High-energy Transients and the Systematic Error

open access: yesThe Astrophysical Journal Supplement Series, 2023
The Gravitational Wave High-energy Electromagnetic Counterpart All-sky Monitor (GECAM) is a pair of microsatellites (i.e., GECAM-A and GECAM-B) dedicated to monitoring gamma-ray transients including the high-energy electromagnetic counterparts of ...
Yi Zhao   +65 more
doaj   +1 more source

Testing general relativity with gravitational-wave catalogs: The insidious nature of waveform systematics

open access: yesiScience, 2021
Summary: Gravitational-wave observations of binary black holes allow new tests of general relativity (GR) to be performed on strong, dynamical gravitational fields.
Christopher J. Moore   +3 more
doaj   +1 more source

Observational Constraints on Black Hole Spin [PDF]

open access: yesAnnual Review of Astronomy and Astrophysics, 2020
The spin of a black hole is an important quantity to study, providing a window into the processes by which a black hole was born and grew. Furthermore, spin can be a potent energy source for powering relativistic jets and energetic particle acceleration.
C. Reynolds
semanticscholar   +1 more source

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