Hexadecapole Approximation in Planetary Microlensing
نویسندگان
چکیده
منابع مشابه
Hexadecapole Approximation in Planetary Microlensing
The frequency of microlensing planet detections, particularly in difficult-tomodel high-magnification events, is increasing. Their analysis can require tens of thousands of processor hours or more, primarily because of the high density and high precision of measurements whose modeling requires time-consuming finitesource calculations. I show that a large fraction of these measurements, those th...
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To maximize the number of planet detections, current microlensing follow-up observations are focusing on high-magnification events which have a higher chance of being perturbed by central caustics. In this paper, we investigate the properties of central caustics and the perturbations induced by them. We derive analytic expressions of the location, size, and shape of the central caustic as a fun...
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Four planets have recently been discovered by gravitational microlensing. The most recent of these discoveries is the lightest planet known to exist around a normal star. The detection of planets in gravitational microlensing events was predicted over a decade ago. Microlensing is now a mature field of astrophysical research and the recent planet detections herald a new chapter in the hunt for ...
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We examine recent results of two kinds of microlensing experiments intended to detect galactic dark matter objects. Lack of short period microlensing events observed for stars in the Large Magellanic Cloud has been interpreted as precluding small-planetary-mass-objects [“rogue planets”, “primordial-fogparticles” (PFPs)] identified, respectively, by Schild 1996 as the lens galaxy missing-mass fr...
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Microlensing light curves are now being monitored with the temporal sampling and photometric precision required to detect small perturbations due to planetary companions of the primary lens. Microlensing is complementary to other planetary search techniques, both in the mass and orbital separation of the planets to which it is sensitive and its potential for measuring the statistical frequency ...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2008
ISSN: 0004-637X,1538-4357
DOI: 10.1086/588601