Results 51 to 60 of about 2,571,706 (401)
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
Detection of the nearest Jupiter analogue in radial velocity and astrometry data [PDF]
Monthly notices of the Royal Astronomical Society, 2019 The presence of Jupiter is crucial to the architecture of the Solar system and models underline this to be a generic feature of planetary systems. We find the detection of the difference between the position and motion recorded by the contemporary ...
F. Feng +6 more
semanticscholar +1 more source
Turbulence characterization from a forward-looking nacelle lidar [PDF]
Wind Energy Science, 2017 We present two methods to characterize turbulence in the turbine inflow using radial velocity measurements from nacelle-mounted lidars. The first uses a model of the three-dimensional spectral velocity tensor combined with a model of the spatial ...
A. Peña, J. Mann, N. Dimitrov
doaj +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
Tachoastrometry: astrometry with radial velocities [PDF]
Astronomy & Astrophysics, 2015 Spectra of composite systems (e.g., spectroscopic binaries) contain spatial information that can be retrieved by measuring the radial velocities (i.e., Doppler shifts) of the components in four observations with the slit rotated by 90 degrees in the sky.
L. Pasquini +6 more
openaire +3 more sources
The BEBOP radial-velocity survey for circumbinary planets [PDF]
Astronomy & Astrophysics, 2019 We introduce the BEBOP radial velocity survey for circumbinary planets. We initiated this survey using the CORALIE spectrograph on the Swiss Euler Telescope at La Silla, Chile.
D. Martin +10 more
semanticscholar +1 more source
MAROON-X: a radial velocity spectrograph for the Gemini Observatory [PDF]
Astronomical Telescopes + Instrumentation, 2018 MAROON-X is a red-optical, high precision radial velocity spectrograph currently nearing completion and undergoing extensive performance testing at the University of Chicago.
A. Seifahrt +3 more
semanticscholar +1 more source
Geodesic Structure of the Accelerated Stephani Universe [PDF]
Symmetry 2021, 13(6), 1001, 2021 For the spherically symmetric Stephani cosmological model with an accelerated expansion, we investigate the main scenarios of the test particle and photon motion. We show that a comoving observer sees an appropriate picture. In the case of purely radial motion, the radial velocity decreases slightly with time due to the universe expansion.
arxiv +1 more source
Quantifying the Bayesian Evidence for a Planet in Radial Velocity Data [PDF]
Astronomical Journal, 2018 We present results from a data challenge posed to the radial velocity (RV) community: namely, to quantify the Bayesian “evidence” for n = {0, 1, 2, 3} planets in a set of synthetically generated RV data sets containing a range of planet signals ...
B. Nelson +8 more
semanticscholar +1 more source