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DIRECT SPECTRUM OF ...
DIRECT SPECTRUM OF THE BENCHMARK T DWARF HD 19467 B
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Crepp, Justin R. (author)
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Rice, Emily L. (author)
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Veicht, Aaron (author)
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Aguilar, Jonathan (author)
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Pueyo, Laurent (author)
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Giorla, Paige (author)
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- Nilsson, Ricky (author)
- Stockholms universitet,Institutionen för astronomi
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Luszcz-Cook, Statia H. (author)
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Oppenheimer, Rebecca (author)
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Hinkley, Sasha (author)
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Brenner, Douglas (author)
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Vasisht, Gautam (author)
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Cady, Eric (author)
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Beichman, Charles A. (author)
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Hillenbrand, Lynne A. (author)
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Lockhart, Thomas (author)
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Matthews, Christopher T. (author)
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Roberts, Lewis C., Jr. (author)
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Sivaramakrishnan, Anand (author)
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Soummer, Remi (author)
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Zhai, Chengxing (author)
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(creator_code:org_t)
- 2015
- 2015
- English.
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In: Astrophysical Journal Letters. - 2041-8205 .- 2041-8213. ; 798:2
- 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
Subject headings
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- HD 19467 B is presently the only directly imaged T dwarf companion known to induce a measurable Doppler acceleration around a solar-type star. We present spectroscopy measurements of this important benchmark object taken with the Project 1640 integral field unit at Palomar Observatory. Our high-contrast R approximate to 30 observations obtained simultaneously across the JH bands confirm the cold nature of the companion as reported from the discovery article and determine its spectral type for the first time. Fitting the measured spectral energy distribution to SpeX/IRTF T dwarf standards and synthetic spectra from BT-Settl atmospheric models, we find that HD 19467 B is a T5.5 +/- 1 dwarf with effective temperature T-eff = 978(-43)(+20) K. Our observations reveal significant methane absorption affirming its substellar nature. HD 19467 B shows promise to become the first T dwarf that simultaneously reveals its mass, age, and metallicity independent from the spectrum of light that it emits.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- brown dwarfs
- stars: individual (HD 19467)
- techniques: high angular resolution
- techniques: spectroscopic
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Crepp, Justin R.
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Rice, Emily L.
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Veicht, Aaron
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Aguilar, Jonatha ...
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Pueyo, Laurent
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Giorla, Paige
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show more...
-
Nilsson, Ricky
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Luszcz-Cook, Sta ...
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Oppenheimer, Reb ...
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Hinkley, Sasha
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Brenner, Douglas
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Vasisht, Gautam
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Cady, Eric
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Beichman, Charle ...
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Hillenbrand, Lyn ...
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Lockhart, Thomas
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Matthews, Christ ...
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Roberts, Lewis C ...
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Sivaramakrishnan ...
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Soummer, Remi
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Zhai, Chengxing
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show less...
- About the subject
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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