Results 41 to 50 of about 665,153 (306)

Accurate and Robust Stellar Rotation Periods Catalog for 82771 Kepler Stars Using Deep Learning

open access: yesThe Astronomical Journal
We propose a new framework to predict stellar properties from light curves. We analyze the light-curve data from the Kepler space mission and develop a novel tool for deriving the stellar rotation periods for main-sequence stars.
Ilay Kamai, Hagai B. Perets
doaj   +1 more source

High accuracy & long timescale light curves

open access: yesEPJ Web of Conferences, 2013
We present a theoretical analysis of the optical light curves (LCs) for short-period high-mass transiting extrasolar planet systems. Our method considers the primary transit, the secondary eclipse, and the overall phase shape of the LC between the ...
Hodgkin S., Mislis D.
doaj   +1 more source

Equivariant Riemann-Roch theorems for curves over perfect fields

open access: yes, 2008
We prove an equivariant Riemann-Roch formula for divisors on algebraic curves over perfect fields. By reduction to the known case of curves over algebraically closed fields, we first show a preliminary formula with coefficients in Q.
Koeck, Bernhard   +3 more
core   +1 more source

Residual tail twisting in ascidian larvae is stabilized by asymmetric myofibrils that resist bilateral symmetry restoration

open access: yesFEBS Letters, EarlyView.
Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure   +3 more
wiley   +1 more source

ATLAS OF LIGHT CURVES OF FAINT MIRA-TYPE STARS. STATISTICAL RELATIONS BETWEEN THE CHARACTERISTICS OF SMOOTHED PHASE LIGHT CURVES

open access: yesOdessa Astronomical Publications, 2010
We propose a set of the photometric parameters which could be useful for the classiffication of the pulsating Mira-type stars and related objects and determination of the EAGB and TPAGB stages of the stellar evolution.
L. S. Kudashkina, I. L. Andronov
doaj   +1 more source

Deep Attention-based Supernovae Classification of Multiband Light Curves

open access: yesThe Astronomical Journal, 2022
In astronomical surveys, such as the Zwicky Transient Facility, supernovae (SNe) are relatively uncommon objects compared to other classes of variable events. Along with this scarcity, the processing of multiband light curves is a challenging task due to
Óscar Pimentel   +2 more
doaj   +1 more source

Spectra and light curves of GRB afterglows [PDF]

open access: yesAstronomy Letters, 2003
We performed accurate numerical calculations of angle-, time-, and frequency-dependent radiative transfer for the relativistic motion of matter in gamma-ray burst (GRB) models. Our technique for solving the transfer equation, which is based on the method of characteristics, can be applied to the motion of matter with a Lorentz factor up to 1000.
Tolstov, A. G., Blinnikov, S. I.
openaire   +2 more sources

Understanding X-ray irradiation in low-mass X-ray binaries directly from their light-curves

open access: yes, 2018
The X-ray light curves of the recurring outbursts observed in low-mass X-ray binaries provide strong test beds for constraining (still) poorly understood disc-accretion processes.
Dubus, G.   +4 more
core   +1 more source

The human gut microbiome across the life course

open access: yesFEBS Letters, EarlyView.
Despite significant individual variation and continuous change throughout life, the human gut microbiome follows some life stage‐specific trends. This article provides a brief overview of how gut microbiome composition shifts across different phases of life. Created in BioRender. Özkurt, E. (2026) https://BioRender.com/8q4nrnc.
Alise J. Ponsero   +4 more
wiley   +1 more source

Joint Estimation of Attitude and Optical Properties of Uncontrolled Space Objects from Light Curves Considering Atmospheric Effects

open access: yesAerospace
The unprecedented increase in the number of objects orbiting the Earth necessitates a comprehensive characterisation of these objects to improve the effectiveness of Space Surveillance and Tracking (SST) operations.
Jorge Rubio   +4 more
doaj   +1 more source

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