Surf Wiki
Save to docs
general/eridanus-constellation

From Surf Wiki (app.surf) — the open knowledge base

DENIS 0255−4700

Star in the constellation Eridanus

Star in the constellation Eridanus

| b-v= | u-b= | r-i = | v-r =

DENIS 0255−4700 is an extremely faint brown dwarf 15.9 ly from the Solar System in the southern constellation of Eridanus. It is the closest isolated L-type brown dwarf (no undiscovered L-dwarfs are expected to be closer), and only after the binary Luhman 16. It is also the faintest brown dwarf (with the absolute magnitude of MV = 24.44) having measured visible magnitude. A number of nearer T and Y-type dwarfs are known, specifically WISE 0855−0714, Epsilon Indi B and C, SCR 1845-6357 B, and UGPS 0722−05.

History of observations

DENIS 0255−4700 was identified for the first time as a probable nearby object in 1999. Its proximity to the Solar System was established by the RECONS group in 2006 when its trigonometric parallax was measured. DENIS 0255-4700 has a relatively small tangential velocity of 27.0 ± 0.5 km/s. The discovery of DENIS 0255-4700 was made by a photometric selection (very red I-J color) performed by Xavier Delfosse using the DENIS survey and optical spectroscopic reconnaissance observations obtained with Low-Resolution Imaging Spectrograph at the Keck II telescope in Mauna Kea observatory (Big island of Hawaii) on December 23, 1998 by Eduardo L Martín and colleagues.

Properties

The photospheric temperature of DENIS 0255−4700 is estimated at 1300 K. Its atmosphere in addition to hydrogen and helium contains water vapor, methane and possibly ammonia. The mass of DENIS 0255−4700 lies in the range from 25 to 65 Jupiter masses corresponding to the age range from 0.3 to 10 billion years. The brown dwarf is rotating rapidly with the period of 1.7 hours, and its rotational axis is inclined 40 degrees from the line-of-sight.

References

| access-date=2009-12-14 }}

References

  1. {{Cite Gaia DR3. 4752399493622045696
  2. {{cite constellation. DENIS 0255-4700
  3. (2006). "Spectroscopic Rotational Velocities of Brown Dwarfs". The Astrophysical Journal.
  4. (2006). "The Solar Neighborhood. XVI. Parallaxes from CTIOPI: Final Results from the 1.5 m Telescope Program". The Astronomical Journal.
  5. Cifuentes, C.. (2020-10-01). "CARMENES input catalogue of M dwarfs. V. Luminosities, colours, and spectral energy distributions". Astronomy and Astrophysics.
  6. (2009). "The 0.8–14.5 μm Spectra of Mid-L to Mid-T Dwarfs: Diagnostics of Effective Temperature, Grain Sedimentation, Gas Transport, and Surface Gravity". The Astrophysical Journal.
  7. Cushing, Michael C.. (2006). "Spitzer Space Telescope Observations of M, L, and T Dwarfs". ASP Conference Series.
  8. (November 2022). "The Fifth Catalogue of Nearby Stars (CNS5)". [[Astronomy & Astrophysics]].
Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

eridanus-(constellation) denis-objects local-bubble l-type-brown-dwarfs astronomical-objects-discovered-in-1999
Want to explore this topic further?

Ask Mako anything about DENIS 0255−4700 — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report