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Title: THE ARECIBO DETECTION OF THE COOLEST RADIO-FLARING BROWN DWARF

Abstract

Radio detection provides unique means to measure and study magnetic fields of the coolest brown dwarfs. Previous radio surveys have observed quiescent and flaring emission from brown dwarfs down to spectral type L3.5, but only upper limits have been established for even cooler objects. We report the detection of sporadic, circularly polarized flares from the T6.5 dwarf, 2MASS J1047+21, with the Arecibo radio telescope at 4.75 GHz. This is by far the coolest brown dwarf yet detected at radio frequencies. The fact that such an object is capable of generating observable, coherent radio emission, despite its very low, {approx}900 K temperature, demonstrates the feasibility of studies of brown dwarfs of the meagerly explored L, T, and Y spectral types, using radio detection as a tool.

Authors:
;  [1]
  1. Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802 (United States)
Publication Date:
OSTI Identifier:
22048007
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 747; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2041-8205
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTROPHYSICS; COSMIC RADIO SOURCES; DETECTION; DWARF STARS; EMISSION; FLARING; GHZ RANGE; MAGNETIC FIELDS; POLARIZATION; RADIO TELESCOPES; RADIOASTRONOMY; RADIOWAVE RADIATION; STELLAR FLARES

Citation Formats

Route, M, and Wolszczan, A. THE ARECIBO DETECTION OF THE COOLEST RADIO-FLARING BROWN DWARF. United States: N. p., 2012. Web. doi:10.1088/2041-8205/747/2/L22.
Route, M, & Wolszczan, A. THE ARECIBO DETECTION OF THE COOLEST RADIO-FLARING BROWN DWARF. United States. https://doi.org/10.1088/2041-8205/747/2/L22
Route, M, and Wolszczan, A. 2012. "THE ARECIBO DETECTION OF THE COOLEST RADIO-FLARING BROWN DWARF". United States. https://doi.org/10.1088/2041-8205/747/2/L22.
@article{osti_22048007,
title = {THE ARECIBO DETECTION OF THE COOLEST RADIO-FLARING BROWN DWARF},
author = {Route, M and Wolszczan, A},
abstractNote = {Radio detection provides unique means to measure and study magnetic fields of the coolest brown dwarfs. Previous radio surveys have observed quiescent and flaring emission from brown dwarfs down to spectral type L3.5, but only upper limits have been established for even cooler objects. We report the detection of sporadic, circularly polarized flares from the T6.5 dwarf, 2MASS J1047+21, with the Arecibo radio telescope at 4.75 GHz. This is by far the coolest brown dwarf yet detected at radio frequencies. The fact that such an object is capable of generating observable, coherent radio emission, despite its very low, {approx}900 K temperature, demonstrates the feasibility of studies of brown dwarfs of the meagerly explored L, T, and Y spectral types, using radio detection as a tool.},
doi = {10.1088/2041-8205/747/2/L22},
url = {https://www.osti.gov/biblio/22048007}, journal = {Astrophysical Journal Letters},
issn = {2041-8205},
number = 2,
volume = 747,
place = {United States},
year = {Sat Mar 10 00:00:00 EST 2012},
month = {Sat Mar 10 00:00:00 EST 2012}
}