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Title: SPIRAL PATTERNS IN PLANETESIMAL CIRCUMBINARY DISKS

Abstract

Planet formation scenarios and the observed planetary dynamics in binaries pose a number of theoretical challenges, especially concerning circumbinary planetary systems. We explore the dynamical stirring of a planetesimal circumbinary disk in the epoch when the gas component disappears. For this purpose, following theoretical approaches by Heppenheimer and Moriwaki and Nakagawa, we develop a secular theory of the dynamics of planetesimals in circumbinary disks. If a binary is eccentric and its components have unequal masses, a spiral density wave is generated, engulfing the disk on a secular timescale, which may exceed 10{sup 7} yr, depending on the problem parameters. The spiral pattern is transient; thus, its observed presence may betray a system’s young age. We explore the pattern both analytically and in numerical experiments. The derived analytical spiral is a modified lituus; it matches the numerical density wave in the gas-free case perfectly. Using the smoothed particle hydrodynamics scheme, we explore the effect of residual gas on the wave propagation.

Authors:
;  [1]
  1. Pulkovo Observatory of the Russian Academy of Sciences, Pulkovskoje Avenue 65, St. Petersburg 196140 (Russian Federation)
Publication Date:
OSTI Identifier:
22522408
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 805; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; DENSITY; EVOLUTION; HYDRODYNAMICS; MASS; PARTICLES; PLANETS; PROTOPLANETS; SATELLITES; STABILITY; STIRRING; TRANSIENTS; WAVE PROPAGATION

Citation Formats

Demidova, Tatiana V., and Shevchenko, Ivan I., E-mail: iis@gao.spb.ru. SPIRAL PATTERNS IN PLANETESIMAL CIRCUMBINARY DISKS. United States: N. p., 2015. Web. doi:10.1088/0004-637X/805/1/38.
Demidova, Tatiana V., & Shevchenko, Ivan I., E-mail: iis@gao.spb.ru. SPIRAL PATTERNS IN PLANETESIMAL CIRCUMBINARY DISKS. United States. doi:10.1088/0004-637X/805/1/38.
Demidova, Tatiana V., and Shevchenko, Ivan I., E-mail: iis@gao.spb.ru. Wed . "SPIRAL PATTERNS IN PLANETESIMAL CIRCUMBINARY DISKS". United States. doi:10.1088/0004-637X/805/1/38.
@article{osti_22522408,
title = {SPIRAL PATTERNS IN PLANETESIMAL CIRCUMBINARY DISKS},
author = {Demidova, Tatiana V. and Shevchenko, Ivan I., E-mail: iis@gao.spb.ru},
abstractNote = {Planet formation scenarios and the observed planetary dynamics in binaries pose a number of theoretical challenges, especially concerning circumbinary planetary systems. We explore the dynamical stirring of a planetesimal circumbinary disk in the epoch when the gas component disappears. For this purpose, following theoretical approaches by Heppenheimer and Moriwaki and Nakagawa, we develop a secular theory of the dynamics of planetesimals in circumbinary disks. If a binary is eccentric and its components have unequal masses, a spiral density wave is generated, engulfing the disk on a secular timescale, which may exceed 10{sup 7} yr, depending on the problem parameters. The spiral pattern is transient; thus, its observed presence may betray a system’s young age. We explore the pattern both analytically and in numerical experiments. The derived analytical spiral is a modified lituus; it matches the numerical density wave in the gas-free case perfectly. Using the smoothed particle hydrodynamics scheme, we explore the effect of residual gas on the wave propagation.},
doi = {10.1088/0004-637X/805/1/38},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 805,
place = {United States},
year = {2015},
month = {5}
}