The precision of time registration with Danjon astrolabe [PDF]
Serbian Astronomical Journal, 1998 During 1988 at the Munich, Vienna and Graz stations selected stars were observed for the purpose of determining difference in the longitudes. The measurements were performed with Danjon astrolabe by using the method of equal zenith distances. In
Perović G., Cvetković Z.
doaj +1 more source
Follow-Up Observations of PTFO 8-8695: A 3 MYr Old T-Tauri Star Hosting a Jupiter-mass Planetary Candidate [PDF]
, 2015 We present Spitzer 4.5\micron\ light curve observations, Keck NIRSPEC radial velocity observations, and LCOGT optical light curve observations of PTFO~8-8695, which may host a Jupiter-sized planet in a very short orbital period (0.45 days). Previous work
Barnes, J. W. +15 more
core +4 more sources
Detection of Planetary Transits Across a Sun-like Star [PDF]
Astrophysical Journal, 1999 We report high-precision, high-cadence photometric measurements of the star HD 209458, which is known from radial velocity measurements to have a planetary-mass companion in a close orbit.
D. Charbonneau +3 more
semanticscholar +1 more source
Most probable transition path in an overdamped system for a finite transition time [PDF]
Phys. Lett. A 353 (2006) 281-290, 2006 The most probable transition path in a one-dimensional overdamped system is rigorously proved to possess less than two turning points. The proof is valid for any potentials, transition times, initial and final transition points.
arxiv +1 more source
A Decade of Hα Transits for HD 189733 b: Stellar Activity versus Absorption in the Extended Atmosphere [PDF]
, 2017 HD 189733 b is one of the most well studied exoplanets due to its large transit depth and host star brightness. The focus on this object has produced a number of high-cadence transit observations using high-resolution optical spectrographs.
P. Cauley, S. Redfield, A. Jensen
semanticscholar +1 more source
Characterization of topological phase transitions via topological properties of transition points [PDF]
Phys. Rev. B 92, 085118 (2015), 2015 We study topological properties of phase transition points of topological quantum phase transitions by assigning a topological invariant defined on a closed circle or surface surrounding the phase transition point in the parameter space of momentum and transition driving parameter.
arxiv +1 more source
No Conclusive Evidence for Transits of Proxima b in MOST Photometry [PDF]
, 2016 The analysis of Proxima Centauri’s radial velocities recently led Anglada-Escudé et al. to claim the presence of a low-mass planet orbiting the Sun’s nearest star once every 11.2 days.
D. Kipping +23 more
semanticscholar +1 more source
Eclipsing binary and white dwarf features associated with K2 target EPIC251248385 [PDF]
, 2019 White dwarfs, remnants of Sun-like stars which have completed their evolution, are one of the most common types of stars in space. Despite this, very few white dwarfs have been observed in transiting or eclipsing systems, and only two planetary systems ...
Armstrong, James D. +5 more
core +1 more source
Gray transits of WD 1145+017 over the visible band [PDF]
, 2016 We have observed several relatively deep transits of the white dwarf WD 1145+017 with the GTC over the wavelength range 480 nm to 920 nm. The observations covered approximately one hour on 2016 Jan 18 and two hours on 2016 Jan 20.
R. Alonso +3 more
semanticscholar +1 more source
The Astrophysical Journal, 2023 We present the first analysis of JWST near-infrared spectroscopy of stellar flares from TRAPPIST-1 during transits of rocky exoplanets. Four flares were observed from 0.6–2.8 μ m with the Near Infrared Imager and Slitless Spectrograph and 0.6–3.5 μ m ...
Ward S. Howard +18 more
doaj +1 more source