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Title: SIMP J2154–1055: A NEW LOW-GRAVITY L4β BROWN DWARF CANDIDATE MEMBER OF THE ARGUS ASSOCIATION

Abstract

We present SIMP J21543454–1055308, a new L4β brown dwarf identified in the SIMP survey that displays signs of low gravity in its near-infrared spectrum. Using BANYAN II, we show that it is a candidate member of the Argus association, albeit with a 21% probability that it is a contaminant from the field. Measurements of radial velocity and parallax will be needed to verify its membership. If it is a member of Argus (age 30-50 Myr), then this object would have a planetary mass of 10 ± 0.5 M {sub Jup}.

Authors:
; ; ; ; ; ;  [1]
  1. Département de Physique, Université de Montréal, C.P. 6128 Succ. Centre-ville, Montréal, QC H3C 3J7 (Canada)
Publication Date:
OSTI Identifier:
22365115
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 792; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; DATA ANALYSIS; DWARF STARS; GRAVITATION; INFRARED SPECTRA; MASS; NEAR INFRARED RADIATION; PROPER MOTION; RADIAL VELOCITY; STAR CLUSTERS

Citation Formats

Gagné, Jonathan, Lafrenière, David, Doyon, René, Artigau, Étienne, Malo, Lison, Robert, Jasmin, and Nadeau, Daniel. SIMP J2154–1055: A NEW LOW-GRAVITY L4β BROWN DWARF CANDIDATE MEMBER OF THE ARGUS ASSOCIATION. United States: N. p., 2014. Web. doi:10.1088/2041-8205/792/1/L17.
Gagné, Jonathan, Lafrenière, David, Doyon, René, Artigau, Étienne, Malo, Lison, Robert, Jasmin, & Nadeau, Daniel. SIMP J2154–1055: A NEW LOW-GRAVITY L4β BROWN DWARF CANDIDATE MEMBER OF THE ARGUS ASSOCIATION. United States. doi:10.1088/2041-8205/792/1/L17.
Gagné, Jonathan, Lafrenière, David, Doyon, René, Artigau, Étienne, Malo, Lison, Robert, Jasmin, and Nadeau, Daniel. Mon . "SIMP J2154–1055: A NEW LOW-GRAVITY L4β BROWN DWARF CANDIDATE MEMBER OF THE ARGUS ASSOCIATION". United States. doi:10.1088/2041-8205/792/1/L17.
@article{osti_22365115,
title = {SIMP J2154–1055: A NEW LOW-GRAVITY L4β BROWN DWARF CANDIDATE MEMBER OF THE ARGUS ASSOCIATION},
author = {Gagné, Jonathan and Lafrenière, David and Doyon, René and Artigau, Étienne and Malo, Lison and Robert, Jasmin and Nadeau, Daniel},
abstractNote = {We present SIMP J21543454–1055308, a new L4β brown dwarf identified in the SIMP survey that displays signs of low gravity in its near-infrared spectrum. Using BANYAN II, we show that it is a candidate member of the Argus association, albeit with a 21% probability that it is a contaminant from the field. Measurements of radial velocity and parallax will be needed to verify its membership. If it is a member of Argus (age 30-50 Myr), then this object would have a planetary mass of 10 ± 0.5 M {sub Jup}.},
doi = {10.1088/2041-8205/792/1/L17},
journal = {Astrophysical Journal Letters},
number = 1,
volume = 792,
place = {United States},
year = {Mon Sep 01 00:00:00 EDT 2014},
month = {Mon Sep 01 00:00:00 EDT 2014}
}