Results 91 to 100 of about 36,355 (202)

All finitely presented groups are QSF

, 2014
This is the third and last of three papers containing the complete proof that all finitely presented groups are QSF.Comment: 57 ...
Poenaru, Valentin
core  

A convergent expansion of the Airy's integral with incomplete Gamma functions

, 2020
There are two main power series for the Airy functions, namely the Maclaurin and the asymptotic expansions. The former converges for all finite values of the complex variable, $z$, but it requires a large number of terms for large values of $|z|$, and ...
Alvarez-Perez, Jose Luis
core  

A Time-resolved High-resolution Spectroscopic Analysis of Ionized Calcium and Dynamical Processes in the Ultra-hot Jupiter HAT-P-70 b

The Astrophysical Journal Letters
We present the first transmission spectroscopy study of an exoplanet atmosphere with the high-resolution mode of the new Gemini High-resolution Optical SpecTrograph (GHOST) instrument at the Gemini South Observatory. We observed one transit of HAT-P-70 b—
Adam B. Langeveld, Emily K. Deibert, Mitchell E. Young, Ernst de Mooij, Ray Jayawardhana, Chris Simpson, Jake D. Turner, Laura Flagg   +7 more
doaj   +1 more source

Recent Star Formation in 0.5 < z < 1.5 Quiescent Galaxies

The Astrophysical Journal Letters
Observations of massive, quiescent galaxies reveal a relatively uniform evolution: following prolific star formation in the early Universe, these galaxies quench and transition to their characteristic quiescent state in the local Universe.
Michael J. Rutkowski, Bonnabelle Zabelle, Tyler Hagen, Anahita Alavi, Seth Cohen, Christopher Conselice, Norman Grogin, Yicheng Guo, Matthew Hayes, Sugata Kaviraj, Anton Koekemoer, Ray A. Lucas, Kameswara Bharadwaj Mantha, Alec Martin, Vihang Mehta, Bahram Mobasher, Nimish Hathi, Zhiyuan Ji, Kalina V. Nedkova, Robert O’Connell, Marc Rafelski, Claudia Scarlata, Harry I. Teplitz, Xin Wang, Rogier Windhorst, L. Y. Aaron Yung, The UVCANDELS Team   +26 more
doaj   +1 more source

Latitudinal Asymmetry in the Dayside Atmosphere of WASP-43b

The Astrophysical Journal Letters
We present two-dimensional near-infrared temperature maps of the canonical hot Jupiter WASP-43b using a phase-curve observation with JWST NIRSpec/G395H. From the white-light planetary transit, we improve constraints on the planet’s orbital parameters and
Ryan C. Challener, Zafar Rustamkulov, Elspeth K. H. Lee, Nikole Lewis, David K. Sing, Stephan M. Birkmann, Nicolas Crouzet, Néstor Espinoza, Elena Manjavacas, Natalia Oliveros-Gomez, Jeff A. Valenti, Jingxuan Yang   +11 more
doaj   +1 more source

X-Rays from a Central “Exhaust Vent” of the Galactic Center Chimney

The Astrophysical Journal Letters
Using deep archival observations from the Chandra X-ray Observatory, we present an analysis of linear X-ray-emitting features located within the southern portion of the Galactic center chimney and oriented orthogonal to the Galactic plane, centered at ...
Scott C. Mackey, Mark R. Morris, Gabriele Ponti, Konstantina Anastasopoulou, Samaresh Mondal   +4 more
doaj   +1 more source

Edge Clique Cover of Claw-free Graphs

, 2016
The smallest number of cliques, covering all edges of a graph $ G $, is called the (edge) clique cover number of $ G $ and is denoted by $ cc(G) $. It is an easy observation that for every line graph $ G $ with $ n $ vertices, $cc(G)\leq n $. G.
Hajebi, Sepehr, Javadi, Ramin
core  

Detectability of Solar Rotation Period across Various Wavelengths

The Astrophysical Journal Letters
The light curves of old G dwarfs obtained in the visible and near-infrared wavelength ranges are highly irregular. This significantly complicates the detectability of the rotation periods of stars similar to the Sun in large photometric surveys, such as ...
Valeriy Vasilyev, Timo Reinhold, Alexander I. Shapiro, Theodosios Chatzistergos, Natalie Krivova, Sami K. Solanki   +5 more
doaj   +1 more source

Partial Differentiation of Callisto as Possible Evidence for Pebble Accretion

The Astrophysical Journal Letters
“Planetesimal or pebble” is one of the most fundamental open questions in planet formation theory. Similarly, “satellitesimal or pebble” remains unsettled regarding the formation of the Galilean satellites.
Yuhito Shibaike
doaj   +1 more source

Metal-polluted Population III Galaxies and How to Find Them

The Astrophysical Journal Letters
Observing Population III (hereafter PopIII) galaxies, the hosts of first-generation stars, remains challenging even with the JWST. The current few candidates have been identified through the combination of a prominent He II emission and the absence of ...
Elka Rusta, Stefania Salvadori, Viola Gelli, Daniel Schaerer, Alessandro Marconi, Ioanna Koutsouridou, Stefano Carniani   +6 more
doaj   +1 more source