Elemental Abundances of Kepler Objects of Interest in APOGEE. I. Two Distinct Orbital Period Regimes Inferred from Host Star Iron Abundances [PDF]
, 2017 The Apache Point Observatory Galactic Evolution Experiment (APOGEE) has observed ∼600 transiting exoplanets and exoplanet candidates from Kepler (Kepler Objects of Interest, KOIs), most with ≥18 epochs. The combined multi-epoch spectra are of high signal-
Robert F. Wilson +16 more
semanticscholar +1 more source
A possible solution of the puzzling variation of the orbital period of MXB 1659–298 [PDF]
, 2017 MXB 1659-298 is a transient neutron star Low-Mass X-ray binary system that shows eclipses with a periodicity of 7.1 hr. The source went to outburst in August 2015 after 14 years of quiescence.
R. Iaria +8 more
semanticscholar +1 more source
HT Cas - eclipsing dwarf nova during its superoutburst in 2010 [PDF]
, 2013 We present results of a world-wide observing campaign of the eclipsing dwarf nova - HT Cas during its superoutburst in November 2010. Using collected data we were able to conduct analysis of the light curves and we calculated $O-C$ diagrams.
Bakowska, K. +5 more
core +2 more sources
Orbital Period Increase in ES Ceti [PDF]
, 2017 We report a long-term study of the eclipse times in the 10-minute helium binary ES Ceti. The binary period increases rapidly, with P/P-dot = 6.2x10^6 yr.
Cook, Lewis +7 more
core +2 more sources
Mean Orbital Elements for Geosynchronous Orbit - II - Orbital inclination, longitude of ascending node, mean longitude [PDF]
Journal of Astronomy and Space Sciences, 1990 The osculating orbital elements include the mean, secular, long period, and short period terms. The iterative algorithm used for conversion of osculating orbital elements to mean orbital elements is described.
Kyu-Hong Choi +3 more
doaj
The Origin of Universality in the Inner Edges of Planetary Systems
The Astrophysical Journal Letters, 2023 The characteristic orbital period of the innermost objects within the galactic census of planetary and satellite systems appears to be nearly universal, with P on the order of a few days. This paper presents a theoretical framework that provides a simple
Konstantin Batygin +2 more
doaj +1 more source
Magnetic Activity and Orbital Period Study for the Short-period RS CVn–type Eclipsing Binary DV Psc
Astrophysical Journal, 2019 Using 27 sets of new multiband photometry light curves acquired from our long-term photometric campaign carried out in the last 5 yr and high-resolution spectroscopic data from seven nights, we analyzed the physical mechanisms of period variation ...
Q. Pi +7 more
semanticscholar +1 more source
Discovery of a 26.2 day period in the long-term X-ray light curve of SXP 1323: a very short orbital period for a long spin period pulsar [PDF]
, 2017 Context. About 120 Be/X-ray binaries (BeXBs) are known in the Small Magellanic Cloud (SMC); about half of them are pulsating with periods from a few to hundreds of seconds. SXP 1323 is one of the longest-period pulsars known in this galaxy. Aims.
S. Carpano, F. Haberl, R. Sturm
semanticscholar +1 more source
ISPRS International Journal of Geo-InformationThe GF-7 satellite, China’s inaugural sub-meter-level stereoscopic mapping satellite, has been deployed for a wide range of applications, including natural resource investigation, environmental monitoring, fundamental surveying, and the development of ...
Haoran Xia +4 more
doaj +1 more source
Orbital Period Changes in WZ Sagittae [PDF]
, 2017 We report a long-term (1961–2017) study of the eclipse times in the dwarf nova WZ Sagittae, in an effort to learn its rate of orbital-period change. Some wiggles with a timescale of 20–50 years are apparent, and a connection with the ∼23 year interval ...
J. Patterson +21 more
semanticscholar +1 more source