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DIRECT SPECTRUM OF THE BENCHMARK T DWARF HD 19467 B

Authors :
Crepp, Justin R.
Rice, Emily L.
Veicht, Aaron
Aguilar, Jonathan
Pueyo, Laurent
Giorla, Paige
Nilsson, Ricky
Luszcz-Cook, Statia H.
Oppenheimer, Rebecca
Hinkley, Sasha
Brenner, Douglas
Vasisht, Gautam
Cady, Eric
Beichman, Charles A.
Hillenbrand, Lynne A.
Lockhart, Thomas
Matthews, Christopher T.
Roberts, Lewis C., Jr.
Sivaramakrishnan, Anand
Soummer, Remi
Zhai, Chengxing
Crepp, Justin R.
Rice, Emily L.
Veicht, Aaron
Aguilar, Jonathan
Pueyo, Laurent
Giorla, Paige
Nilsson, Ricky
Luszcz-Cook, Statia H.
Oppenheimer, Rebecca
Hinkley, Sasha
Brenner, Douglas
Vasisht, Gautam
Cady, Eric
Beichman, Charles A.
Hillenbrand, Lynne A.
Lockhart, Thomas
Matthews, Christopher T.
Roberts, Lewis C., Jr.
Sivaramakrishnan, Anand
Soummer, Remi
Zhai, Chengxing
Publication Year :
2015

Abstract

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.<br />AuthorCount:21

Details

Database :
OAIster
Notes :
English
Publication Type :
Electronic Resource
Accession number :
edsoai.on1234715499
Document Type :
Electronic Resource
Full Text :
https://doi.org/10.1088.2041-8205.798.2.L43