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Direction dependent calibration of widefield radio interferometers estimates the systematic errors along multiple directions in the sky. This is necessary because with most systematic errors that are caused by effects such as the ionosphere…

天体物理仪器与方法 · 物理学 2021-12-22 Sarod Yatawatta

The series of the experiments on precise mass measurement of $J/\Psi$-, $\Psi'$- mesons have been performed in 2002-2004. Energy calibration has been done with the help of the resonant depolarization technique. The present paper discusses…

加速器物理 · 物理学 2018-01-08 A. V. Bogomyagkov , S. A. Nikitin , A. G. Shamov

The effect of radial drift rate on mean motion resonance capture is studied for prograde, polar and retrograde orbits. We employ the numerical framework of our earlier exploration of resonance capture at arbitrary inclination. Randomly…

地球与行星天体物理 · 物理学 2017-02-02 Fathi Namouni , Maria Helena Moreira Morais

It is possible to learn a great deal about exoplanet atmospheres even when we cannot spatially resolve the planets from their host stars. In this chapter, we overview the basic techniques used to characterize transiting exoplanets -…

地球与行星天体物理 · 物理学 2019-02-06 Laura Kreidberg

We present a coupled 3-D atmospheric dynamics and radiative transfer model to predict the disk-integrated thermal emission spectra of transiting exoplanets in edge-on orbits. We calculate spectra at high resolution to examine the extent to…

地球与行星天体物理 · 物理学 2017-12-27 Jisheng Zhang , Eliza Kempton , Emily Rauscher

Roughly half of Solar-type planet hosts have stellar companions, so understanding how these binary companions affect the formation and evolution of planets is an important component to understanding planetary systems overall. Measuring the…

The ability to observe extrasolar planets transiting their stars has profoundly changed our understanding of these planetary systems. However, these measurements depend on how well we understand the properties of the host star, such as…

太阳与恒星天体物理 · 物理学 2022-06-15 Hilding R. Neilson , John B. Lester , Fabien Baron

Calibration is a key step in the signal processing pipeline of any radio astronomical instrument. The required sky, ionospheric and instrumental models for this step can suffer from various kinds of incompleteness. In this paper we analyze…

天体物理仪器与方法 · 物理学 2019-02-08 A. Mouri Sardarabadi , L. V. E. Koopmans

We present a brief overview of the main effects by which a star will have an impact (positive or negative) on the surface habitability of planets in orbit around it. Specifically, we review how spectral, spatial and temporal variations in…

地球与行星天体物理 · 物理学 2021-04-14 Martin Turbet , Franck Selsis

The role of cosmic microwave background (CMB) polarisation data in constraining the presence of primordial isocurvature modes is examined. While the MAP satellite mission will be unable to simultaneously constrain isocurvature modes and…

天体物理学 · 物理学 2009-10-31 M Bucher , K Moodley , N Turok

Knowledge of an exoplanet's oblateness and obliquity would give clues about its formation and internal structure. In principle, a light curve of a transiting planet bears information about the planet's shape, but previous work has shown…

地球与行星天体物理 · 物理学 2015-05-18 Joshua A. Carter , Joshua N. Winn

Large ground- and space-based telescopes will be able to observe Earth-like planets in the near future. We explore how different planetary surfaces can strongly influence the climate, atmospheric composition, and remotely detectable spectra…

地球与行星天体物理 · 物理学 2020-05-20 Jack Madden , Lisa Kaltenegger

This paper discusses the Cosmic Background (CB) dipoles observations in the framework of the Planck mission. Dipoles observations can be used in three ways: (i) It gives a measurement of the peculiar velocity of our Galaxy which is an…

天体物理学 · 物理学 2009-11-07 M. Piat , G. Lagache , J. P. Bernard , M. Giard , J. L. Puget

This paper is a continuation of our previous analysis (i.e. Turyshev 2002a, 2002b) of the relativistic stellar aberration requirements for the Space Interferometry Mission (SIM). Here we have considered a problem of how the expected…

广义相对论与量子宇宙学 · 物理学 2007-05-23 Slava G. Turyshev

We discuss the interpretation of distortions to stellar spectral lines with particular attention to line bisectors in the presence of an orbiting planetary companion. We present a simple model whereby light reflected by the companion can…

天体物理学 · 物理学 2009-10-30 David Charbonneau , Saurabh Jha , Robert W. Noyes

In this paper, we explore the astrophysical implications of near-field microlensing and its effects on stellar transit observations, with a special emphasis on the Kepler mission. Kepler is a NASA-approved mission whose goal is to detect a…

天体物理学 · 物理学 2009-11-07 Kailash C. Sahu , Ronald L. Gilliland

The Planck satellite is expected to improve the measurement of most cosmological parameters by several factors with respect to current WMAP results. The actual performance may depend upon various aspects of the data analysis. In this paper…

天体物理学 · 物理学 2010-11-02 L. P. L. Colombo , E. Pierpaoli , J. R. Pritchard

By observing the transits of exoplanets, one may determine many fundamental system parameters. I review current techniques and results for the parameters that can be measured with the greatest precision, specifically, the transit times, the…

天体物理学 · 物理学 2009-11-13 Joshua N. Winn

Accurate inclusion of both spin precession and orbital eccentricity effects in gravitational waveform models represents a key hurdle in our ability to fully characterize the properties of compact binaries. Virtually all efforts to model…

广义相对论与量子宇宙学 · 物理学 2026-04-01 Lucy M. Thomas , Katerina Chatziioannou , Sam Johar , Taylor Knapp , Michael Boyle

Measured rotational speeds of giant planets and brown dwarfs frequently constitute appreciable fractions of the breakup limit, resulting in centrifugal expansion of these objects at the equator. According to models of internal energy…

地球与行星天体物理 · 物理学 2022-10-26 Mikhail Lipatov , Timothy D. Brandt , Natasha E. Batalha