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Título:
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Ground-based detection of an extended helium atmosphere in the Saturn-mass exoplanet WASP-69b
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Autores:
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Montes Gutiérrez, David
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Tipo de documento:
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texto impreso
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Editorial:
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Amer Assoc Advancement Science, 2018-12-21
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Astrofísica
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Tipo = Artículo
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Resumen:
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Hot gas giant exoplanets can lose part of their atmosphere due to strong stellar irradiation, affecting their physical and chemical evolution. Studies of atmospheric escape from 2 exoplanets have mostly relied on space-based observations of the hydrogen Lyman-? line in the far ultraviolet which is strongly affected by interstellar absorption. Using ground-based high-resolution spectroscopy we detect excess absorption in the helium triplet at 1083 nm during the transit of the Saturn-mass exoplanet WASP-69b, at a signal-to-noise ratio of 18. We measure line blue shifts of several km s^(-1) and post transit absorption, which we interpret as the escape of part of the atmosphere trailing behind the planet in comet-like form.
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En línea:
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https://eprints.ucm.es/id/eprint/51663/1/davidmontes95preprint.pdf
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