Results 71 to 80 of about 1,520 (178)

Early steep optical decay linked to reverse shock for GRB200131A

Acta Polytechnica
We observed an optical afterglow of GRB200131A obtaining the first photometric point 63 s after the satellite trigger. This early observation shows a steep decay, suggesting either internal engine activity or a reverse shock.
Martin Jelínek, Filip Novotný, Sylvio Klose, Bringfried Stecklum, Alžběta Maleňáková, Jan Štrobl   +5 more
doaj   +1 more source

On the Existence, Rareness, and Uniqueness of Quenched H i-rich Galaxies in the Local Universe

The Astrophysical Journal
Using data from ALFALFA, xGASS, H i -MaNGA, and the Sloan Digital Sky Survey (SDSS), we identify a sample of 47 “red but H i -rich” (RR) galaxies with near-UV (NUV) − r > 5 and unusually high H i -to-stellar mass ratios. We compare the optical properties
Xiao Li, Cheng Li, H. J. Mo, Jianhong Hu, Jing Wang, Ting Xiao   +5 more
doaj   +1 more source

Limits on dark matter annihilation from the shape of radio emission in M31

Journal of High Energy Physics
Well-motivated models of dark matter often result in a population of electrons and positrons within galaxies produced through dark matter annihilation — usually in association with gamma rays.
Mitchell J. Weikert, Matthew R. Buckley
doaj   +1 more source

Direct Samples of Interstellar and Interplanetary Material with IMAP. [PDF]

Space Sci Rev
Szalay JR, Provornikova E, Ayari E, Bzowski M, Christian ER, Funsten HO, Galli A, Gkioulidou M, Horányi M, Livi S, McComas DJ, Möbius E, Ogasawara K, Rahmanifard F, Rankin JS, Reisenfeld DB, Schwadron NA, Sternovsky Z, Swaczyna P, Turner D, Zank GP, Zirnstein EJ.   +21 more
europepmc   +1 more source

Direct observation of organic molecules in asteroid ryugu revealed by high-resolution atomic force microscope. [PDF]

Nat Commun
Iwata K, Oba Y, Naraoka H, Yabuta H, Tachibana S, Sugimoto Y.   +5 more
europepmc   +1 more source

The Formation of Glycolamide on Interstellar Ices. [PDF]

ACS Cent Sci
Viti S.
europepmc   +1 more source

Chemistry in Extreme Environments: The Mystery of Molecular Complexity in Space. [PDF]

ACS Cent Sci
Puzzarini C, Alessandrini S.
europepmc   +1 more source

Nonequilibrium Synthesis of Glycolamide (NH₂COCH₂OH), a Precursor to Amino Acids, on Interstellar Nanoparticles. [PDF]

ACS Cent Sci
Bergantini A, Wang J, Antonov I, Batrakova EA, Tuchin SO, Kaiser RI.   +5 more
europepmc   +1 more source

Increased and varied radiation during the Sun's encounters with cold clouds in the last 10 million years. [PDF]

Sci Rep
Opher M, Giacalone J, Loeb A, Economo EP, Cummings A, Middleton J, Zucker C, Miller JA, Nica A, Hatzaki M.   +9 more
europepmc   +1 more source

Energetic and Spectroscopic Insights into the C₃H₆O₂ Isomer Family for Astrochemical Purposes. [PDF]

ACS Earth Space Chem
Savarese A, Alessandrini S, Melosso M, Panizzi G, Nonne M, Bizzocchi L, Puzzarini C.   +6 more
europepmc   +1 more source