2011MNRAS.410..641M

Query : 2011MNRAS.410..641M

2011MNRAS.410..641M - Mon. Not. R. Astron. Soc., 410, 641-644 (2011/January-1)

New limits on H+3 abundance on Neptune using Keck NIRSPEC.

MELIN H., STALLARD T., MILLER S., LYSTRUP M.B., TRAFTON L.M., BOOTH T.C. and RIVERS C.

Abstract (from CDS):

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 ∼ 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/m2, 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 ∼ 2, whereas previous observations had noted the solar reflection as being brighter on the Southern hemisphere.


Abstract Copyright: 2010 The Authors. Journal compilation2010 RAS

Journal keyword(s): techniques: spectroscopic - planets and satellites: atmospheres - planets and satellites: aurorae - planets and satellites: composition - planets and satellites: individual: Uranus - planets and satellites: individual: Neptune

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HD 218639 * 23 09 49.5497799912 -14 30 37.998666504   6.43 6.43     A0V 50 0

Query : 2011MNRAS.410..641M

Basic data :
HD 218639 -- Star
Other object types: otypes_help 		* (2020A&A,HD,...), UV (TD1), NIR (2MASS)
ICRS coord. (ep=J2000) : 		23 09 49.5497799912 -14 30 37.998666504 (Optical) [ 0.0241 0.0219 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		23 07 11.7878131708 -14 46 54.791013878 [ 0.0241 0.0219 90 ]
Gal coord. (ep=J2000) : 		055.8710220421271 -63.1946429887480 [ 0.0241 0.0219 90 ]
Proper motions mas/yr : 		29.837 -7.493 [0.033 0.028 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 17.39 [0.61] / z(spectroscopic) 0.000058 [0.000002] / cz 17.39 [0.61]
   (Opt) A 2022yCat.1355....0G
Parallaxes (mas): 		9.6689 [0.0268] A 2020yCat.1350....0G
Spectral type: 		A0V C 1988MSS...C04....0H
Fluxes (6) :
B 6.43 [~] E ~
V 6.43 [~] E ~
G 6.425416 [0.002797] C 2022yCat.1355....0G
J 6.379 [0.018] C 2003yCat.2246....0C
H 6.400 [0.033] C 2003yCat.2246....0C
K 6.369 [0.023] C 2003yCat.2246....0C
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 1 : 4730 Display criteria :

Identifiers (23) :
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HD 218639 GSC 05827-01273 SAO 165522 UBV M 26866
BD-15 6360 HIC 114371 SKY# 43946 uvby98 100218639
FK5 3856 HIP 114371 TD1 29654 YZ 104 8569
GC 32261 HR 8816 TIC 5716512 Gaia DR2 2410222091875449216
GCRV 23384 2MASS J23094954-1430379 TYC 5827-1273-1 Gaia DR3 2410222091875449216
GEN# +1.00218639 PPM 241256 UBV 19826

References (50 between 1850 and 2026) (Total 50)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 4    Distance : 4    Rot : 6    Fe/H : 2    Plx : 4    PM : 5    SpT : 4   

   

Observing logs
ISO : 1   

   

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Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

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HD 218639 BD-15 6360 FK5 3856 GSC 05827-01273 HIC 114371
HIP 114371 HR 8816 2MASS J23094954-1430379 PPM 241256 SAO 165522
TD1 29654 TYC 5827-1273-1 uvby98 100218639 Gaia DR2 2410222091875449216 Gaia DR3 2410222091875449216

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