Abstract
From models of the interplanetary Lyman-α glow derived from observations by the Mercury Atmospheric and Surface Composition Spectrometer (MASCS) interplanetary Lyman-α data obtained in 2009–2011 on the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft mission, daily all-sky Lyman-α maps were generated for use by the Lunar Reconnaissance Orbiter (LRO) LAMP Lyman-Alpha Mapping Project (LAMP) experiment. These models were then compared with Solar and Heliospheric Observatory (SOHO) Solar Wind ANistropy (SWAN) Lyman-α maps when available. Although the empirical agreement across the sky between the scaled model and the SWAN maps is adequate for LAMP mapping purposes, the model brightness values best agree with the SWAN values in 2008 and 2009. SWAN’s observations show a systematic decline in 2010 and 2011 relative to the model. It is not clear if the decline represents a failure of the model or a decline in sensitivity in SWAN in 2010 and 2011. MESSENGER MASCS and SOHO SWAN Lyman-α calibrations systematically differ in comparison with the model, with MASCS reporting Lyman-α values some 30 % lower than SWAN.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
J.M. Ajello et al., Observations of interplanetary Lyman-alpha with the Galileo ultraviolet spectrometer: multiple scattering effects at solar maximum. Astron. Astrophys. 289, 283–303 (1994)
J-L. Bertaux et al., SWAN: a study of solar wind anisotropies on SOHO with Lyman alpha sky mapping. Sol. Phys. 162, 403–439 (1995)
J-L. Bertaux, E. Quémerais, R. Lallement, Observations of a sky Lyman alpha groove related to enhanced solar wind mass flux in the neutral sheet. Geophys. Res. Lett. 23, 3675–3678 (1996)
J-L. Bertaux et al., First results from SWAN Lyman α solar wind mapper on SOHO. Sol. Phys. 175, 737–770 (1997)
M. Bzowski, Density of neutral interstellar hydrogen at the termination shock from Ulysses pickup ion observations. Astron. Astrophys. 491, 7–19 (2008)
M. Bzowski et al., Solar parameters for modeling the interplanetary background. In: Cross-Calibration of Far UV Spectra of Solar System Objects and the Heliosphere, ed. by E. Quémerais, M. Snow, R.M. Bonnet. ISSI Scientific Report Series, SR-013 (2013)
J.W. Cook et al., Latitudinal anisotropy of the solar far ultraviolet flux: effect on the Lyman-alpha sky background. Astron. Astrophys. 97, 394–397 (1981)
J. Costa et al., Heliospheric interstellar H temperature from SOHO/SWAN H cell data. Astron. Astrophys. 349, 660–672 (1999)
C. Emerich et al., A new relation between the central spectral solar H I Lyman alpha irradiance and the line irradiance measured by SUMER/SOHO during the cycle 23. Icarus 178, 429–433 (2005)
G.R. Gladstone et al., LAMP: The Lyman alpha mapping project on NASA’s lunar reconnaissance orbiter mission. Space Sci. Rev. 150, 161–181 (2010)
G.R. Gladstone et al., Far-ultraviolet reflectance properties of the Moon’s permanently shadowed regions. J. Geophys. Res. 117, E00H04 (2011). doi:10.1029/2011JE003913
D.T. Hall, Ultraviolet resonance radiation and the structure of the heliosphere Dissertation, University of Arizona, 1992
D. Hoffleit, W.H. Warren Jr., The Bright Star Catalogue, 5th Revised edn. (National Space Science Data Center/Astronomical Data Center, 1991)
V.V. Izmodenov et al., Distribution of interstellar hydrogen atoms in the heliosphere and backscattered solar Lyman-α. In: Cross-Calibration of Far UV Spectra of Solar System Objects and the Heliosphere, ed. by E. Quémerais, M. Snow, R.M. Bonnet. ISSI Scientific Report Series, SR-013 (2013)
J.H. King, N.E. Papitashvili, Solar wind spatial scales in and comparisons of hourly Wind and ACE plasma and magnetic field data. J. Geophys. Res. 110, A02104 (2005). doi:10.1029/2004JA010649
R. Lallement et al., Deflection of the interstellar neutral hydrogen flow across the heliospheric interface. Science 307, 1447–1449 (2005)
W.E. McClintock, M.R. Lankton, The mercury atmospheric and surface composition spectrometer for the MESSENGER mission. Space Sci. Rev. 131, 481–521 (2007)
W.E. McClintock et al., MESSENGER observations of Mercury’s exosphere: detection of magnesium and distribution of constituents. Science 324, 610–613 (2009)
D.J. McComas et al., Measurements of variations in the solar wind-interstellar hydrogen charge exchange rate. Geophys. Res. Lett. 26, 2701–2704 (1999)
W.R. Pryor et al., The Galileo and Pioneer Venus ultraviolet spectrometer experiments: solar Lyman-alpha latitude variation at solar maximum from interplanetary Lyman-alpha observations. Astrophys. J. 394, 363–377 (1992)
W.R. Pryor, S.J. Lasica, A.I.F. Stewart, D.T. Hall, S. Lineaweaver, W.B. Colwell, J.M. Ajello, O.R. White, W.K. Tobiska, Interplanetary Lyman alpha observations from Pioneer Venus over a solar cycle from 1978 to 1992. J. Geophys. Res. 103, 26833–26849 (1998a)
W.R. Pryor, M. Witte, J.M. Ajello, Interplanetary Lyman alpha remote sensing with the Ulysses interstellar neutral gas experiment. J. Geophys. Res. 103, 26813–26831 (1998b)
W.R. Pryor, J.M. Ajello, D.J. McComas, M. Witte, W.K. Tobiska, Hydrogen atom lifetimes in the three-dimensional heliosphere over the solar cycle. J. Geophys. Res. 108, A108034 (2003). doi:10.1029/2003JA009878
W.R. Pryor et al., Radiation transport of heliospheric Lyman-alpha from combined Cassini and Voyager data sets. Astron. Astrophys. 491, 21–28 (2008)
E. Quémerais et al., Interplanetary hydrogen absolute ionization rates: retrieving the solar wind mass flux latitude and cycle dependence with SWAN/SOHO maps. J. Geophys. Res. 111, A09114 (2006). doi:10.1029/2006JA011711
M. Snow et al., A new catalog of ultraviolet stellar spectra for calibration. In: Cross-Calibration of Far UV Spectra of Solar System Objects and the Heliosphere, ed. by E. Quémerais, M. Snow, R.M. Bonnet. ISSI Scientific Report Series, SR-013 (2013)
T.R. Summanen, R. Lallement, E. Quémerais, Solar wind proton flux latitudinal variations: comparisons between Ulysses in situ data and indirect measurements from interstellar Lyman alpha mapping. J. Geophys. Res. 102, 7051–7062 (1997)
T.R. Summanen et al., Interplanetary Lyman alpha observations of SWAN during the rising phase of the 23rd solar cycle. Adv. Space Res. 29, 457–462 (2002)
G.E. Thomas, The interstellar wind and its influence on the interplanetary environment. Ann. Rev. Earth Planet. Sci. 6, 173–204 (1978)
W.K. Tobiska et al., The SOLAR2000 empirical solar irradiance model and forecast tool. J. Atmos. Sol. Terr. Phys. 62, 1233–1250 (2000)
N. Witt, J.M. Ajello, P.W. Blum, Solar wind latitudinal variations deduced from Mariner 10 interplanetary H (1216 A) observations. Astron. Astrophys. 73, 272–281 (1979)
M. Witte, Kinetic parameters of interstellar neutral helium. review of results obtained during one solar cycle with the Ulysses/GAS-instrument. Astron. Astrophys. 426, 835–844 (2004)
T.N. Woods, W.K. Tobiska, G.J. Rottman, J.R. Worden, Improved solar Lyman alpha irradiance modeling from 1947 through 1999 based on UARS observations. J. Geophys. Res. 105, 27195–27215 (2000)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2013 Springer Science+Business Media New York
About this chapter
Cite this chapter
Pryor, W.R. et al. (2013). Lyman-α Models for LRO LAMP from MESSENGER MASCS and SOHO SWAN Data. In: Quémerais, E., Snow, M., Bonnet, RM. (eds) Cross-Calibration of Far UV Spectra of Solar System Objects and the Heliosphere. ISSI Scientific Report Series, vol 13. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-6384-9_5
Download citation
DOI: https://doi.org/10.1007/978-1-4614-6384-9_5
Published:
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4614-6383-2
Online ISBN: 978-1-4614-6384-9
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)