Results 91 to 100 of about 31,207 (206)

Strong Constraints to the Putative Planet Candidate around VB 10 using Doppler spectroscopy

, 2010
We present new radial velocity measurements of the ultra-cool dwarf VB 10, which was recently announced to host a giant planet detected with astrometry.
Anglada-Escudé, Bean, Bean, Berger, Burgasser, Donati, Fitzpatrick, Font-Ribera, Ford, Ford, Nidever, Pravdo, Scholz, Wright   +13 more
core   +1 more source

Direct-imaging Discovery of a Substellar Companion Orbiting the Accelerating Variable Star HIP 39017

The Astronomical Journal
We present the direct-imaging discovery of a substellar companion (a massive planet or low-mass brown dwarf) to the young, γ Doradus ( γ Dor)-type variable star HIP 39017 (HD 65526). The companion’s SCExAO/CHARIS JHK (1.1–2.4 μ m) spectrum and Keck/NIRC2
Taylor L. Tobin, Thayne Currie, Yiting Li, Jeffrey Chilcote, Timothy D. Brandt, Brianna Lacy, Masayuki Kuzuhara, Maria Vincent, Mona El Morsy, Vincent Deo, Jonathan P. Williams, Olivier Guyon, Julien Lozi, Sebastien Vievard, Nour Skaf, Kyohoon Ahn, Tyler Groff, N. Jeremy Kasdin, Taichi Uyama, Motohide Tamura, Aidan Gibbs, Briley L. Lewis, Rachel Bowens-Rubin, Maïssa Salama, Qier An, Minghan Chen   +25 more
doaj   +1 more source

Microarcsecond astrometry with Gaia: the solar system, the Galaxy and beyond

, 2004
Gaia is an all sky, high precision astrometric and photometric satellite of the European Space Agency (ESA) due for launch in 2010-2011. Its primary mission is to study the composition, formation and evolution of our Galaxy.
Bailer-Jones, C. A. L.
core   +1 more source

Commission 8: Astrometry: (Astrometrie) [PDF]

Transactions of the International Astronomical Union, 2002
Wenjing Jin, Imants Platais, E. Costa, C. Ducourant, I. Kumkova, M.G. Lattanzi, C. Lu, S. Röser, E. Schilbach, H. Schwan, R. Stone   +10 more
openaire   +1 more source

Exoplanets: Gaia and the importance of ground based spectroscopy follow-up

, 2014
The search for extrasolar planets has developed rapidly and, today, more than 1700 planets have been found orbiting stars. Thanks to Gaia, we will collect high-accuracy astrometric orbits of thousands of new low-mass celestial objects, such as extra ...
Adibekyan, V. Zh., Benamati, L., Santos, N. C., Sozzetti, A.   +3 more
core   +1 more source

Meteor trail drift research based on baseline observations

Solar-Terrestrial Physics, 2019
We analyze the results of a rare long-lived quasisymmetric ellipsoidal-annular meteor trail recorded on November 18, 2017 by two optical all-sky cameras, spaced at a distance of 150 km. The analysis is based on astrometric processing results with the use
Ivanov K.I., Komarova E.S., Vasilyev R.V., Eselevich M.V., Mikhalev A.V.   +4 more
doaj   +1 more source

Astrometry and Relativity

Il Nuovo Cimento B, 2005
General relativistic effects in astrophyiscal systems have been detected thanks to accurate astrometric measurements. We outline some keystones of astrometry such as stellar aberration (argument development during the years 1727-1872); Mercury's perihelion precession (1845-1916); solar disk oblateness (1966-2001); relativistic light deflection (1916 ...
openaire   +2 more sources

Interferometry from Space: A Great Dream

, 2014
During some thirty years, 1980-2010, technical studies of optical interferometry from instruments in space were pursued as promising for higher spatial resolution and for higher astrometric accuracy.
Høg, Erik
core  

A Curated Dataset of Regional Meteor Events with Simultaneous Optical and Infrasound Observations (2006–2011)

Data
We present a curated, openly accessible dataset of 71 regional meteor events simultaneously recorded by optical and infrasound instrumentation between 2006 and 2011. These events were captured during an observational campaign using the all-sky cameras of
Elizabeth A. Silber, Emerson Brown, Andrea R. Thompson, Vedant Sawal   +3 more
doaj   +1 more source

The Depth of the Heavens – Belief and Knowledge During 2500 Years

Open Astronomy, 2003
For Dante Alighieri (1265-1321) the spiritual cosmos contained the Heavens, Earth and Hell, and it was compatible with the physical cosmos known from Aristotle (384-322 B.C.).
Høg Erik
doaj   +1 more source