Results 21 to 30 of about 468,326 (252)

Elemental Abundances of the Super-Neptune WASP-107b’s Host Star Using High-resolution, Near-infrared Spectroscopy

The Astrophysical Journal, 2023
We present the first elemental abundance measurements of the K dwarf (K7V) exoplanet-host star WASP-107 using high-resolution ( R ≃45,000), near-infrared ( H - and K -band) spectra taken from Gemini-S/IGRINS.
Neda Hejazi, Ian J. M. Crossfield, Thomas Nordlander, Megan Mansfield, Diogo Souto, Emilio Marfil, David R. Coria, Jonathan Brande, Alex S. Polanski, Joseph E. Hand, Kate F. Wienke   +10 more
doaj   +1 more source

Pure pseudo-C_l estimators for CMB B-modes [PDF]

, 2006
Fast heuristically weighted, or pseudo-C_l, estimators are a frequently used method for estimating power spectra in CMB surveys with large numbers of pixels.
Bakrats, Bond, Bunn, Challinor, Hansen, Hivon, Kamionkowski, Kamionkowski, Kendrick M. Smith, Kovac, Readhead, Seljak, Smith, Stompor, Wandelt, Zaldarriaga   +15 more
core   +2 more sources

MOSEL Survey: JWST Reveals Major Mergers/strong Interactions Drive the Extreme Emission Lines in the Early Universe

The Astrophysical Journal Letters, 2023
Extreme emission line galaxies (EELGs), where nebular emissions contribute 30%–40% of the flux in certain photometric bands, are ubiquitous in the early Universe ( z > 6).
Anshu Gupta, Ravi Jaiswar, Vicente Rodriguez-Gomez, Ben Forrest, Kim-Vy Tran, Themiya Nanayakkara, Anishya Harshan, Elisabete da Cunha, Glenn G. Kacprzak, Michaela Hirschmann   +9 more
doaj   +1 more source

F-GAMMA: Multi-frequency radio monitoring of Fermi blazars. The 2.64 to 43 GHz Effelsberg light curves from 2007-2015 [PDF]

, 2019
The advent of the Fermi-GST with its unprecedented capability to monitor the entire 4 pi sky within less than 2-3 hours, introduced new standard in time domain gamma-ray astronomy. To explore this new avenue of extragalactic physics the F-GAMMA programme
Angelakis, E., Fuhrmann, L., Karamanavis, V., Kraus, A., Krichbaum, T. P., Marchili, N., Myserlis, I., Nestoras, I., Rachen, J. P., Zensus, J. A.   +9 more
core   +3 more sources

ARCADE: Absolute Radiometer for Cosmology, Astrophysics, and Diffuse Emission [PDF]

, 2006
The Absolute Radiometer for Cosmology, Astrophysics, and Diffuse Emission (ARCADE) is a balloon-borne instrument designed to measure the temperature of the cosmic microwave background at centimeter wavelengths.
A. Kogut, Bartlett, Burigana, Burigana, D. Fixsen, E. Wollack, Fixsen, Fixsen, Fixsen, Fixsen, Fornengo, Gnedin, Gush, Haiman, J. Singal, Jungman, Kogut, Kogut, L. Lowe, M. Limon, M. Seiffert, Mather, Oh, P. Lubin, P. Mirel, S. Fixsen, S. Levin, Singal, Sunyaev, Valle, Zeld´ovich   +30 more
core   +2 more sources

Optical Synoptic Telescopes: New Science Frontiers

, 2010
Over the past decade, sky surveys such as the Sloan Digital Sky Survey have proven the power of large data sets for answering fundamental astrophysical questions.
Tyson, J. Anthony
core   +1 more source

Modelling gravitational waves from precessing black-hole binaries: Progress, challenges and prospects [PDF]

, 2013
The inspiral and merger of two orbiting black holes is among the most promising sources for the first (hopefully imminent) direct detection of gravitational waves (GWs), and measurements of these signals could provide a wealth of information about ...
Hannam, Mark
core   +3 more sources

Introduction to neutrino astronomy

, 2018
This writeup is an introduction to neutrino astronomy, addressed to astronomers and written by astroparticle physicists. While the focus is on achievements and goals in neutrino astronomy, rather than on the aspects connected to particle physics, we will
Mascaretti, Carlo, Palladino, Andrea, Rosso, Andrea Gallo, Vissani, Francesco   +3 more
core   +3 more sources

Impact of Laboratory Exercises on Undergraduate Learning Outcomes in Online STEM General Education Courses Among Working Adult and Returning Students

Online Learning
Fully online courses and degree programs are popular with students. These courses should provide the rigor and value of traditional learning in a face-to-face classroom to ensure mastery of concepts and learning objectives.
Kristen A. Miller, Joseph Marra, Shelli N. Carter   +2 more
doaj   +1 more source

Christián Carman and Rodolfo P. Buzón, Aristarco de Samos

Aestimatio, 2022
: This work by Aristarchus belongs to ancient science, which may be considered in three fields of development: ∘ mathematics, especially that focused on the geometry in Euclid’s Elements or Archimedes’ works; ∘ astronomy, understood as a science that ...
Maria Rosa Massa-Esteve
doaj   +1 more source