Zobrazeno 1 - 10
of 166
pro vyhledávání: '"Peter Goldreich"'
Autor:
J. Luan, Peter Goldreich
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f89177f529aa66b6af7f524281ce8fe
Autor:
Brant Robertson, Peter Goldreich
Publikováno v:
The Astrophysical Journal. 854:88
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
Autor:
Alison J. Farmer, Peter Goldreich
Publikováno v:
Icarus. 188:108-119
The discovery of a molecular oxygen atmosphere around Saturn's rings has important implications for the electrodynamics of the ring system. Its existence was inferred from the Cassini in situ detection of molecular oxygen ions above the rings during
Publikováno v:
The Astrophysical Journal. 614:497-507
We address three questions regarding solar system planets. What determined their number? Why are their orbits nearly circular and coplanar? How long did they take to form? Runaway accretion in a disk of small bodies resulted in a tiny fraction of the
Autor:
Peter Goldreich, Nicole J. Rappaport
Publikováno v:
Icarus. 162:391-399
Recent HST images of the Saturnian satellites Prometheus and Pandora show that their longitudes deviate from predictions of ephemerides based on Voyager images. Currently Prometheus is lagging and Pandora leading these predictions by somewhat more th
Publikováno v:
Icarus. 219:241-243
Numerical simulations and analysis show that the Moon locks into resonance with a statistical preference of facing either the current near-side or far-side toward Earth. The near-side is largely covered by dense, topographically low, dark mare basalt
Autor:
Peter Goldreich, J. Luan
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2f25fe6109d3e7e7ee0355aee2fc3287
https://resolver.caltech.edu/CaltechAUTHORS:20140815-140932022
https://resolver.caltech.edu/CaltechAUTHORS:20140815-140932022
Autor:
J. Luan, Peter Goldreich
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e26b6ae6a8889013213dd7ec55650c67
Autor:
Jing Luan, Peter Goldreich
Publikováno v:
The Astronomical Journal. 153:17
Several pairs of solar system satellites occupy mean motion resonances (MMRs). We divide these into two groups according to their proximity to exact resonance. Proximity is measured by the existence of a separatrix in phase space. MMRs between Io–E