The intermediate-age brown dwarf LP 944-20 (original) (raw)

Oxford Academic

Navbar Search Filter Mobile Enter search term Search

Monthly Notices of the Royal Astronomical Society

Royal Astronomical Society

Journal Article

Search for other works by this author on:

Navbar Search Filter Mobile Enter search term Search

Abstract

Observations are presented which show that Li I λ 6708 is detected with an equivalent width of 0.53 ± 0.05Å in the proper-motion object LP 944-20 (which is also known as BRI 0337-3535). Hα is detected in emission at an equivalent width of 1.2 ± 0.5Å. The detection of Li implies a mass less than 0.065 M⊙, making this object a brown dwarf. Moreover, the relative weakness of this Li detection (compared to the equivalent widths of 1–2Å seen in objects of similar spectral type in the Pleiades) implies that Li has been somewhat depleted. This, together with the precisely determined luminosity of LP 944-20, implies a mass between 0.056 and 0.064 M⊙, and age between 475 and 650 Myr. This makes it the first brown dwarf to have a well-constrained mass and age determined.

This content is only available as a PDF.

Citations

Views

Altmetric

Metrics

Total Views 266

18 Pageviews

248 PDF Downloads

Since 4/1/2017

Month: Total Views:
April 2017 1
May 2017 2
August 2017 2
September 2017 2
October 2017 2
December 2017 2
January 2018 2
February 2018 2
March 2018 8
April 2018 5
May 2018 4
June 2018 6
July 2018 3
August 2018 3
September 2018 4
October 2018 5
November 2018 5
December 2018 3
January 2019 4
February 2019 9
March 2019 28
April 2019 20
May 2019 11
June 2019 4
July 2019 2
August 2019 4
September 2019 2
October 2019 6
November 2019 16
December 2019 9
January 2020 12
February 2020 3
March 2020 4
April 2020 8
May 2020 2
June 2020 3
July 2020 2
August 2020 2
September 2020 3
October 2020 1
December 2020 1
February 2021 2
March 2021 1
April 2021 2
May 2021 2
June 2021 1
July 2021 2
August 2021 1
September 2021 1
October 2021 3
November 2021 1
December 2021 1
January 2022 1
April 2022 3
May 2022 1
June 2022 2
July 2022 1
October 2022 2
December 2022 1
January 2023 1
May 2023 1
June 2023 1
August 2023 1
September 2023 2
December 2023 2
March 2024 1
April 2024 1
May 2024 3
June 2024 1
July 2024 2
August 2024 2
September 2024 1
October 2024 2

Citations

92 Web of Science

×

Email alerts

Citing articles via

More from Oxford Academic

Monthly Notices of the Royal Astronomical Society