THE ROLL-OVER OF HELIOSPHERIC NEUTRAL HYDROGEN BELOW 100 eV: OBSERVATIONS AND IMPLICATIONS

被引：28

作者：

Galli, A. ^{[1
]}

Wurz, P. ^{[1
]}

Schwadron, N. A. ^{[2
]}

Kucharek, H. ^{[2
]}

Mobius, E. ^{[2
]}

Bzowski, M. ^{[3
]}

Sokol, J. M. ^{[3
]}

Kubiak, M. A. ^{[3
]}

Funsten, H. O. ^{[4
]}

Fuselier, S. A. ^{[5
,6
]}

McComas, D. J. ^{[5
,6
]}

机构：

[1] Univ Bern, Inst Phys, CH-3012 Bern, Switzerland

[2] Univ New Hampshire, Durham, NH 03824 USA

[3] Polish Acad Sci, Space Res Ctr, PL-00716 Warsaw, Poland

[4] Los Alamos Natl Lab, Intelligence & Space Res Div, POB 1663, Los Alamos, NM 87545 USA

[5] SW Res Inst, 6220 Culebra Rd, San Antonio, TX 78228 USA

[6] Univ Texas San Antonio, San Antonio, TX 78249 USA

来源：

ASTROPHYSICAL JOURNAL | 2016年 / 821卷 / 02期

基金：

瑞士国家科学基金会;

关键词：

ISM: general; plasmas; solar wind; Sun: heliosphere; INTERSTELLAR-BOUNDARY-EXPLORER; LY-ALPHA ABSORPTION; 1ST; 5; YEARS; TERMINATION SHOCK; VOYAGER; INNER HELIOSHEATH; ATOM FLUX; IBEX; HELIOTAIL; HELIUM;

D O I：

10.3847/0004-637X/821/2/107

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present an improved analysis of the energy spectrum of energetic neutral hydrogen from the heliosheath observed with the IBEX-Lo sensor on the Interstellar Boundary EXplorer from the years 2009 to 2012. This analysis allows us to study the lowest energies between 10 and 100 eV although various background sources are more intense than the targeted signal over broad areas of the sky. The results improve our knowledge of the interaction region between our heliosphere and the interstellar plasma because these neutral atoms are direct messengers from the low-energy plasma in the heliosheath. We find a roll-over of the energy spectrum below 100 eV, which has major implications for the pressure balance of the plasma in the inner heliosheath. The results can also be compared directly with in situ observations of the Voyager 1 and 2 spacecraft.

引用

页数：10

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