Zobrazeno 1 - 10
of 175
pro vyhledávání: '"Goldreich, Peter"'
Autor:
Robertson, Brant, Goldreich, Peter
The properties of supersonic isothermal turbulence influence a variety of astrophysical phenomena, including the structure and evolution of star forming clouds. This work presents a simple model for the structure of dense regions in turbulence in whi
Externí odkaz:
http://arxiv.org/abs/1801.05440
Autor:
Luan, Jing, Goldreich, Peter
As established by ground based surveys, white dwarfs with hydrogen atmospheres pulsate as they cool across the temperature range, $12500\,\mathrm{K} \gtrsim T_{\mathrm{eff}} \gtrsim 10800\,\mathrm{K}$. Known as DAVs or ZZ Ceti stars, their oscillatio
Externí odkaz:
http://arxiv.org/abs/1711.06367
Autor:
Luan, Jing, Goldreich, Peter
Rubble piles are a common feature of solar system bodies. They are composed of monolithic elements of ice or rock bound by gravity. Voids occupy a significant fraction of the volume of a rubble pile. They can exist up to pressure $P\approx \epsy\mu$,
Externí odkaz:
http://arxiv.org/abs/1510.05295
Autor:
Luan, Jing, Goldreich, Peter
The pulsar triple system, J0337+1715, is remarkably regular and highly hierarchical. Secular dynamics controls its long term evolution with orbital commensurability having negligible effect. Secular interactions transfer angular momentum between inne
Externí odkaz:
http://arxiv.org/abs/1405.2374
Autor:
Luan, Jing, Goldreich, Peter
Fast Radio Bursts (FRBs) are isolated, $\ms$ radio pulses with dispersion measure (DM) of order $10^3\DMunit$. Galactic candidates for the DM of high latitude bursts detected at $\GHz$ frequencies are easily dismissed. DM from bursts emitted in stell
Externí odkaz:
http://arxiv.org/abs/1401.1795
We assess the multi-planet systems discovered by the Kepler satellite in terms of current ideas about orbital migration and eccentricity damping due to planet-disk interactions. Our primary focus is on mean motion resonances. Only a few percent of pl
Externí odkaz:
http://arxiv.org/abs/1308.4688
Autor:
Robertson, Brant, Goldreich, Peter
Publikováno v:
Astrophysical Journal Letters, 750, 31 (2012)
Turbulence influences the behavior of many astrophysical systems, frequently by providing non-thermal pressure support through random bulk motions. Although turbulence is commonly studied in systems with constant volume and mean density, turbulent as
Externí odkaz:
http://arxiv.org/abs/1203.4815
A number of synchronous moons are thought to harbor water oceans beneath their outer ice shells. A subsurface ocean frictionally decouples the shell from the interior. This has led to proposals that a weak tidal or atmospheric torque might cause the
Externí odkaz:
http://arxiv.org/abs/0910.0032
Autor:
Goldreich, Peter, Sari, Re'em
Publikováno v:
Astrophys.J.691:54-60,2009
Many small bodies in the solar system are believed to be rubble piles, a collection of smaller elements separated by voids. We propose a model for the structure of a self-gravitating rubble pile. Static friction prevents its elements from sliding rel
Externí odkaz:
http://arxiv.org/abs/0712.0446
The atmospheres of Jupiter and Saturn exhibit strong and stable zonal winds. How deep the winds penetrate unabated into each planet is unknown. Our investigation favors shallow winds. It consists of two parts. The first part makes use of an Ohmic con
Externí odkaz:
http://arxiv.org/abs/0711.3922