skip to main content

SciTech ConnectSciTech Connect

Title: PROPERTIES OF THE NEARBY BROWN DWARF WISEP J180026.60+013453.1

We present new spectroscopy and astrometry to characterize the nearby brown dwarf WISEP J180026.60+013453.1. The optical spectral type, L7.5, is in agreement with the previously reported near-infrared spectral type. The preliminary trigonometric parallax places it at a distance of 8.01 ± 0.21 pc, confirming that it is the fourth closest known late-L (L7–L9) dwarf. The measured luminosity, our detection of lithium, and the lack of low surface gravity indicators indicates that WISEP J180026.60+013453.1 has a mass 0.03 < M < 0.06 M{sub ⊙} and an age between 300 million and 1.5 billion years according to theoretical substellar evolution models. The low space motion is consistent with this young age. We have measured the rotational broadening (v sin i = 13.5 ± 0.5 km s{sup −1}), and use it to estimate a maximum rotation period of 9.3 hr.
Authors:
 [1] ;  [2] ;  [3]
  1. Department of Physics and Astronomy, University of Delaware, Newark, DE 19716 (United States)
  2. Center for Astrophysics and Space Science, University of California San Diego, La Jolla, CA 92093 (United States)
  3. US Naval Observatory, Flagstaff Station, 10391 West Naval Observatory Road, Flagstaff, AZ 86001 (United States)
Publication Date:
OSTI Identifier:
22520069
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astronomical Journal (Online); Journal Volume: 150; Journal Issue: 6; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABSORPTION SPECTROSCOPY; DETECTION; DWARF STARS; EMISSION SPECTROSCOPY; GRAVITATION; LITHIUM; LUMINOSITY; MASS; NEAR INFRARED RADIATION; ROTATION; SURFACES