LOCAL INTERSTELLAR MEDIUM: SIX YEARS OF DIRECT SAMPLING BY IBEX

被引：133

作者：

McComas, D. J. ^{[1
,2
]}

Bzowski, M. ^{[3
]}

Fuselier, S. A. ^{[1
,2
]}

Frisch, P. C. ^{[4
]}

Galli, A. ^{[5
]}

Izmodenov, V. V. ^{[6
,7
,8
]}

Katushkina, O. A. ^{[6
]}

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

Lee, M. A. ^{[9
]}

Leonard, T. W. ^{[9
]}

Moebius, E. ^{[9
]}

Park, J. ^{[9
]}

Schwadron, N. A. ^{[1
,9
]}

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

Swaczyna, P. ^{[3
]}

Wood, B. E. ^{[10
]}

Wurz, P. ^{[5
]}

机构：

[1] Southwest Res Inst, San Antonio, TX 78228 USA

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

[3] Polish Acad Sci, Space Res Ctr, PL-01237 Warsaw, Poland

[4] Univ Chicago, Chicago, IL 60637 USA

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

[6] Russian Acad Sci, Space Res Inst IKI, Moscow 117997, Russia

[7] Moscow MV Lomonosov State Univ, Moscow, Russia

[8] Russian Acad Sci, Inst Problems Mech, Moscow, Russia

[9] Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA

[10] Naval Res Lab, Div Space Sci, Washington, DC 20375 USA

来源：

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | 2015年 / 220卷 / 02期

基金：

瑞士国家科学基金会;

关键词：

interplanetary medium; ISM: general; local interstellar matter; Sun: heliosphere; FLOW PARAMETERS; LO OBSERVATIONS; PHYSICAL-PROPERTIES; ABUNDANCE RATIO; NEUTRAL HELIUM; SOLAR-WIND; GAS-FLOW; IN-SITU; HELIOSPHERE; HYDROGEN;

D O I：

10.1088/0067-0049/220/2/22

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Interstellar Boundary Explorer (IBEX) has been directly observing neutral atoms from the local interstellar medium for the last six years (2009-2014). This paper ties together the 14 studies in this Astrophysical Journal Supplement Series Special Issue, which collectively describe the IBEX interstellar neutral results from this epoch and provide a number of other relevant theoretical and observational results. Interstellar neutrals interact with each other and with the ionized portion of the interstellar population in the "pristine" interstellar medium ahead of the heliosphere. Then, in the heliosphere's close vicinity, the interstellar medium begins to interact with escaping heliospheric neutrals. In this study, we compare the results from two major analysis approaches led by IBEX groups in New Hampshire and Warsaw. We also directly address the question of the distance upstream to the pristine interstellar medium and adjust both sets of results to a common distance of similar to 1000 AU. The two analysis approaches are quite different, but yield fully consistent measurements of the interstellar He flow properties, further validating our findings. While detailed error bars are given for both approaches, we recommend that for most purposes, the community use "working values" of similar to 25.4 km s(-1), similar to 75 degrees.7 ecliptic inflow longitude, similar to-5 degrees.1 ecliptic inflow latitude, and similar to 7500 K temperature at similar to 1000 AU upstream. Finally, we briefly address future opportunities for even better interstellar neutral observations to be provided by the Interstellar Mapping and Acceleration Probe mission, which was recommended as the next major Heliophysics mission by the NRC's 2013 Decadal Survey.

引用

页数：11

共 50 条

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