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RECOVERY OF THE CAN...
RECOVERY OF THE CANDIDATE PROTOPLANET HD 100546 b WITH GEMINI/NICI AND DETECTION OF ADDITIONAL (PLANET-INDUCED ?) DISK STRUCTURE AT SMALL SEPARATIONS
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Currie, Thayne (author)
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Muto, Takayuki (author)
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Kudo, Tomoyuki (author)
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Honda, Mitsuhiko (author)
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Brandt, Timothy D. (author)
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Grady, Carol (author)
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Fukagawa, Misato (author)
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Burrows, Adam (author)
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- Janson, Markus (author)
- Stockholms universitet,Institutionen för astronomi
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Kuzuhara, Masayuki (author)
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McElwain, Michael W. (author)
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Follette, Katherine (author)
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Hashimoto, Jun (author)
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Henning, Thomas (author)
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Kandori, Ryo (author)
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Kusakabe, Nobuhiko (author)
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Kwon, Jungmi (author)
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Mede, Kyle (author)
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Morino, Jun-ichi (author)
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Nishikawa, Jun (author)
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Pyo, Tae-Soo (author)
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Serabyn, Gene (author)
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Suenaga, Takuya (author)
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Takahashi, Yasuhiro (author)
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Wisniewski, John (author)
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Tamura, Motohide (author)
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(creator_code:org_t)
- 2014
- 2014
- English.
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In: Astrophysical Journal Letters. - 2041-8205 .- 2041-8213. ; 796:2, s. L30-
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- We report the first independent, second epoch (re-) detection of a directly imaged protoplanet candidate. Using L' high-contrast imaging of HD 100546 taken with the Near-Infrared Coronagraph and Imager on Gemini South, we recover HD 100546 b with a position and brightness consistent with the original Very Large Telescope/NAos-COnica detection from Quanz et al., although data obtained after 2013 will be required to decisively demonstrate common proper motion. HD 100546 b may be spatially resolved, up to approximate to 12-13 AU in diameter, and is embedded in a finger of thermal IR-bright, polarized emission extending inward to at least 0 ''.3. Standard hot-start models imply a mass of approximate to 15 M-J. However, if HD 100546 b is newly formed or made visible by a circumplanetary disk, both of which are plausible, its mass is significantly lower (e.g., 1-7 M-J). Additionally, we discover a thermal IR-bright disk feature, possibly a spiral density wave, at roughly the same angular separation as HD 100546 b but 90 degrees. away. Our interpretation of this feature as a spiral arm is not decisive, but modeling analyses using spiral density wave theory implies a wave launching point exterior to approximate to 0 ''.45 embedded within the visible disk structure: plausibly evidence for a second, hitherto unseen, wide-separation planet. With one confirmed protoplanet candidate and evidence for one to two others, HD 100546 is an important evolutionary precursor to intermediate-mass stars with multiple super-Jovian planets at moderate/wide separations like HR 8799.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- planetary systems
- stars: early-type
- stars: individual (HD 100546)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Currie, Thayne
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Muto, Takayuki
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Kudo, Tomoyuki
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Honda, Mitsuhiko
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Brandt, Timothy ...
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Grady, Carol
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show more...
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Fukagawa, Misato
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Burrows, Adam
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Janson, Markus
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Kuzuhara, Masayu ...
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McElwain, Michae ...
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Follette, Kather ...
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Hashimoto, Jun
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Henning, Thomas
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Kandori, Ryo
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Kusakabe, Nobuhi ...
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Kwon, Jungmi
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Mede, Kyle
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Morino, Jun-ichi
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Nishikawa, Jun
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Pyo, Tae-Soo
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Serabyn, Gene
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Suenaga, Takuya
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Takahashi, Yasuh ...
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Wisniewski, John
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Tamura, Motohide
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show less...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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Astrophysical Jo ...
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Stockholm University