2012ApJS..198...14S

Query : 2012ApJS..198...14S

2012ApJS..198...14S - Astrophys. J., Suppl. Ser., 198, 14 (2012/February-0)

Local interstellar neutral hydrogen sampled in situ by IBEX.

SAUL L., WURZ P., RODRIGUEZ D., SCHEER J., MOBIUS E., SCHWADRON N., KUCHAREK H., LEONARD T., BZOWSKI M., FUSELIER S., CREW G. and McCOMAS D.

Abstract (from CDS):

Hydrogen gas is the dominant component of the local interstellar medium. However, owing to ionization and interaction with the heliosphere, direct sampling of neutral hydrogen in the inner heliosphere is more difficult than sampling the local interstellar neutral helium, which penetrates deep into the heliosphere. In this paper, we report on the first detailed analysis of the direct sampling of neutral hydrogen from the local interstellar medium. We confirm that the arrival direction of hydrogen is offset from that of the local helium component. We further report the discovery of a variation of the penetrating hydrogen over the first two years of Interstellar Boundary Explorer observations. Observations are consistent with hydrogen experiencing an effective ratio of outward solar radiation pressure to inward gravitational force greater than unity (µ > 1); the temporal change observed in the local interstellar hydrogen flux can be explained with solar variability.

Abstract Copyright: ∼

Journal keyword(s): ISM: general - ISM: kinematics and dynamics - Sun: heliosphere - Sun: particle emission

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 NAME NEP reg 18 00 00.000 +66 33 38.55           ~ 430 0

Query : 2012ApJS..198...14S

Basic data :
NAME NEP -- Region defined in the Sky
Other object types: otypes_help 		reg ()
ICRS coord. (ep=J2000) : 		18 00 00.000 +66 33 38.55 [ ] D ~
FK4 coord. (ep=B1950 eq=1950) : 		18 00 00.300 +66 33 38.48 [ ]
Gal coord. (ep=J2000) : 		096.383977 +29.811440 [ ]
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Identifiers (3) :
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NAME NEP NAME North Ecliptic Pole NAME Northern Ecliptic Pole

References (430 between 1850 and 2026) (Total 430)
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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