Extrasolar Carbon Planets

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dc.creatorKuchner, Marc J.
dc.creatorSeager, S.
dc.date2005-04-08
dc.date2005-05-02
dc.date.accessioned2026-07-07T02:17:25Z
dc.date.available2026-07-07T02:17:25Z
dc.descriptionWe suggest that some extrasolar planets <~ 60 Earth masses will form substantially from silicon carbide and other carbon compounds. Pulsar planets and low-mass white dwarf planets are especially good candidate members of this new class of planets, but these objects could also conceivably form around stars like the Sun. This planet-formation pathway requires only a factor of two local enhancement of the protoplanetary disk's C/O ratio above solar, a condition that pileups of carbonaceous grains may create in ordinary protoplanetary disks. Hot, Neptune-mass carbon planets should show a significant paucity of water vapor in their spectra compared to hot planets with solar abundances. Cooler, less massive carbon planets may show hydrocarbon-rich spectra and tar-covered surfaces. The high sublimation temperatures of diamond, SiC, and other carbon compounds could protect these planets from carbon depletion at high temperatures.
dc.description17 pages, 2 figures, submitted to ApJ
dc.identifierhttps://arxiv.org/abs/astro-ph/0504214
dc.identifierhttp://arxiv.org/abs/astro-ph/0504214
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/9163
dc.subjectAstrophysics
dc.titleExtrasolar Carbon Planets
dc.typetext

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