Results 31 to 40 of about 2,481,024 (387)
Research on Tangential Velocity Solution and Accuracy Analysis of Radar Target [PDF]
MATEC Web of Conferences, 2023 In this paper, a calculation method for the tangential velocity solution of radar target based on linear vector method is proposed. It makes full use of the advantage of high precision radial velocity measurement of radar, and realizes the accurate ...
Yin Qi +3 more
doaj +1 more source
A Study of the Radial Velocity of BX Andromedae [PDF]
Journal of Astronomy and Space Sciences, 2004 High resolution spectroscopic observations of BX And using the BOES (Bohyunsan Optical Echelle Spectrograph) of Bohyunsan Optical Astronomical Observatory (BOAO) were performed during 26-27, Feb. 2003.
Chung-Uk Lee +3 more
doaj +1 more source
A wide star–black-hole binary system from radial-velocity measurements [PDF]
Nature, 2019 All stellar-mass black holes have hitherto been identified by X-rays emitted from gas that is accreting onto the black hole from a companion star. These systems are all binaries with a black-hole mass that is less than 30 times that of the Sun1–4. Theory
Jifeng Liu +54 more
semanticscholar +1 more source
Advanced Engineering Materials, EarlyView., 2023 A novel method for tracking structural changes in gels using widely accessible microcomputed tomography is presented and validated for various hydro‐, alco‐, and aerogels. The core idea of the method is to track positions of micrometer‐sized tracer particles entrapped in the gel and relate them to the density of the gel network.
Anja Hajnal +3 more
wiley +1 more source
Hemodynamic Data Analysis and Site of Measurement in Children and Adolescents
Artery Research, 2020 Pulse wave velocity is a method of functional vascular evaluation. The gold standard is the carotid-femoral pulse wave velocity measurement. However, the software allows measurement among radial, carotid and femoral artery.
Mirjam Močnik, Nataša Marčun Varda
doaj +1 more source
Overfitting Affects the Reliability of Radial Velocity Mass Estimates of the V1298 Tau Planets
The Astronomical Journal, 2023 Mass, radius, and age measurements of young (≲100 Myr) planets have the power to shape our understanding of planet formation. However, young stars tend to be extremely variable in both photometry and radial velocity (RV) measurements, which makes ...
Sarah Blunt +25 more
doaj +1 more source
Allesfitter: Flexible Star and Exoplanet Inference from Photometry and Radial Velocity [PDF]
Astrophysical Journal Supplement Series, 2019 We present allesfitter, a public and open-source Python software for flexible and robust inference of stars and exoplanets given photometric and radial velocity data.
M. Gunther, T. Daylan
semanticscholar +1 more source
The TESS-Keck Survey. XVI. Mass Measurements for 12 Planets in Eight Systems
The Astronomical Journal, 2023 With JWST’s successful deployment and unexpectedly high fuel reserves, measuring the masses of sub-Neptunes transiting bright, nearby stars will soon become the bottleneck for characterizing the atmospheres of small exoplanets via transmission ...
Joseph M. Akana Murphy +47 more
doaj +1 more source
Three years of Sun-as-a-star radial-velocity observations on the approach to solar minimum [PDF]
Monthly notices of the Royal Astronomical Society, 2019 The time-variable velocity fields of solar-type stars limit the precision of radial-velocity determinations of their planets’ masses, obstructing detection of Earth twins.
A. Cameron +36 more
semanticscholar +1 more source
Radial Velocity Measurements of HR 8799 b and c with Medium Resolution Spectroscopy [PDF]
Astronomical Journal, 2019 High-contrast medium resolution spectroscopy has been used to detect molecules such as water and carbon monoxide in the atmospheres of gas giant exoplanets.
J. Ruffio +8 more
semanticscholar +1 more source