Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Analytical mathematics"'
Autor:
Eric R. Coughlin
Publikováno v:
The Astrophysical Journal Letters, Vol 975, Iss 1, p L14 (2024)
Astrophysical explosions that contain dense and ram-pressure-dominated ejecta evolve through an interaction phase, during which a forward shock (FS), contact discontinuity (CD), and reverse shock (RS) form and expand with time. We describe new self-s
Externí odkaz:
https://doaj.org/article/524d8e51492740fa9bee340e463a5697
Publikováno v:
The Astrophysical Journal Letters, Vol 969, Iss 2, p L26 (2024)
We introduce “Class Symbolic Regression” (Class SR), the first framework for automatically finding a single analytical functional form that accurately fits multiple data sets—each realization being governed by its own (possibly) unique set of f
Externí odkaz:
https://doaj.org/article/d7ba15e7421e4d1b9a52f7f63b70ce7d
Publikováno v:
The Astrophysical Journal, Vol 977, Iss 1, p 91 (2024)
Collisionless systems often exhibit nonthermal power-law tails in their distribution functions. Interestingly, collisionless plasmas in various physical scenarios (e.g., the ion population of the solar wind) feature a v ^−5 tail in their velocity (
Externí odkaz:
https://doaj.org/article/431cc514f6ac464382aee77c3b5ad874
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 275, Iss 1, p 15 (2024)
High-spatial-resolution images of the solar corona acquired in the extreme ultraviolet (EUV), most notably with the Atmospheric Imaging Assembly (AIA) instrument on the Solar Dynamics Observatory (SDO) reveal the abundance of dynamic events which ran
Externí odkaz:
https://doaj.org/article/ba48d8a1e89c4adeae15ad0e3ad34b7d
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 128 (2024)
We propose a novel method to constrain the tidal quality factor, $Q^{\prime} $ , from an observed nonsynchronized star–planet system consisting of a slowly rotating low-mass star and a close-in Jovian planet, taking into account the coevolution of
Externí odkaz:
https://doaj.org/article/1973b601515342508f6da2597cf7fd13
Autor:
Simon Rozier, Raphaël Errani
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 91 (2024)
Placed slightly out of dynamical equilibrium, an isolated stellar system quickly returns toward a steady virialized state. We study this process of collisionless relaxation using the matrix method of linear response theory. We show that the full phas
Externí odkaz:
https://doaj.org/article/465b3506309945a39fd35d7622b94ee4
Autor:
Eric R. Coughlin, Mitchell C. Begelman
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 2, p 158 (2024)
JWST observations demonstrate that supermassive black holes (SMBHs) exist by redshifts z ≳ 10, providing further evidence for “direct collapse” black hole (BH) formation, whereby massive (∼10 ^3–5 M _⊙ ) SMBH seeds are generated within a
Externí odkaz:
https://doaj.org/article/6c78a98bc7f04496bed990e94b2ebb07
Autor:
Sean J. Gunderson, Kenneth G. Gayley
Publikováno v:
The Astrophysical Journal, Vol 965, Iss 2, p 174 (2024)
We present a general procedure for deriving a line-profile model for massive-star X-ray spectra that captures the dynamics of the wind more directly. The basis of the model is the analytic solution to the problem of variable jets in Herbig–Haro obj
Externí odkaz:
https://doaj.org/article/00e16e9b141d4476982837be760a1ca7
Publikováno v:
The Astronomical Journal, Vol 167, Iss 5, p 222 (2024)
This work describes the illumination of exoplanets whose orbits are close enough to their host star that the finite angular size of their host star causes hyper illumination, in which more than 50% of the planet receives light. Such exoplanets includ
Externí odkaz:
https://doaj.org/article/ce0679a3377b471e99291d946de4a6ad
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 271, Iss 2, p 56 (2024)
Fine-tuning studies whether some physical parameters, or relevant ratios between them, are located within so-called life-permitting intervals of small probability outside of which carbon-based life would not be possible. Recent developments have foun
Externí odkaz:
https://doaj.org/article/75d1bfb49f8e436488b3b6cf11223e90