UCL  IRIS
Institutional Research Information Service
UCL Logo
Please report any queries concerning the funding data grouped in the sections named "Externally Awarded" or "Internally Disbursed" (shown on the profile page) to your Research Finance Administrator. Your can find your Research Finance Administrator at http://www.ucl.ac.uk/finance/research/post_award/post_award_contacts.php by entering your department
Please report any queries concerning the student data shown on the profile page to:

Email: portico-services@ucl.ac.uk

Help Desk: http://www.ucl.ac.uk/ras/portico/helpdesk
Publication Detail
New limits on H+(3) abundance on Neptune using Keck NIRSPEC
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Melin H, Stallard T, Miller S, Lystrup MB, Trafton LM, Booth TC, Rivers C
  • Publisher:
    WILEY-BLACKWELL PUBLISHING, INC
  • Publication date:
    01/01/2011
  • Pagination:
    641, 644
  • Journal:
    MON NOT R ASTRON SOC
  • Volume:
    410
  • Issue:
    1
  • Print ISSN:
    0035-8711
  • Language:
    EN
  • Keywords:
    techniques: spectroscopic, planets and satellites: atmospheres, planets and satellites: aurorae, planets and satellites: composition, planets and satellites: individual: Uranus, planets and satellites: individual: Neptune, ULTRAVIOLET SPECTROMETER OBSERVATIONS, H-3(+) EMISSION, URANUS, TEMPERATURE, SATURN, ATMOSPHERE, MOLECULE, JUPITER, AURORA, H-3+
  • Addresses:
    Melin, H
    Univ Leicester
    Dept Phys & Astron
    Leicester
    LE1 7RH
    Leics
    England
Abstract
Neptune and Uranus are observed with Keck II NIRSPEC in an attempt to detect H+(3) emission from Neptune. In this set of observations, H+(3) emission remains undetected at Neptune, whereas line-resolved emission from Uranus was observed with a signal-to-noise ratio of similar to 100. Using this, we have derived an upper limit of the column-integrated H+(3) density on Neptune of 1.5 (+4.8(-0.9))x 1013 m-2, assuming a temperature of 550 +/- 100 K. This value improves the previous established limit by a factor of 20 and shows that the H+(3) density predicted by the best available model overestimate the density by at least a factor of 3.In addition, the solar reflection continuum of Neptune in the K and L' bands is seen to be brighter on the Northern hemisphere by a factor of similar to 2, whereas previous observations had noted the solar reflection as being brighter on the Southern hemisphere.
Publication data is maintained in RPS. Visit https://rps.ucl.ac.uk
 More search options
UCL Researchers
Author
Dept of Science & Technology Studies
University College London - Gower Street - London - WC1E 6BT Tel:+44 (0)20 7679 2000

© UCL 1999–2011

Search by