Loading…

INTERSTELLAR PICK-UP IONS OBSERVED BETWEEN 11 AND 22 AU BY NEW HORIZONS

We report new observations by the Solar Wind Around Pluto instrument on the New Horizons spacecraft, which measures energy per charge (E/q) spectra of solar wind and interstellar pick-up ions (PUIs) between 11 AU and 22 AU from the Sun. The data provide an unprecedented look at PUIs as there have be...

Full description

Saved in:
Bibliographic Details
Published in:The Astrophysical journal 2013-05, Vol.768 (2), p.1-8
Main Authors: Randol, B M, McComas, D J, Schwadron, N A
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
cited_by cdi_FETCH-LOGICAL-c343t-baa1361e04b4fd9d5456f64d887ef31dd8f00377e2f3784c1897f93761ef76593
cites cdi_FETCH-LOGICAL-c343t-baa1361e04b4fd9d5456f64d887ef31dd8f00377e2f3784c1897f93761ef76593
container_end_page 8
container_issue 2
container_start_page 1
container_title The Astrophysical journal
container_volume 768
creator Randol, B M
McComas, D J
Schwadron, N A
description We report new observations by the Solar Wind Around Pluto instrument on the New Horizons spacecraft, which measures energy per charge (E/q) spectra of solar wind and interstellar pick-up ions (PUIs) between 11 AU and 22 AU from the Sun. The data provide an unprecedented look at PUIs as there have been very few measurements of PUIs beyond 10 AU. We analyzed the PUI part of the spectra by comparing them to the classic Vasyliunas and Siscoe PUI model. Our analysis indicates that PUIs are usually well-described by this distribution. We derive parameters relevant to PUI studies, such as the ionization rate normalized to 1 AU. Our result for the average ionization rate between 11 and 12 AU agrees with an independently derived average value found during the same time. Later, we find a general increase in the ionization rate, which is consistent with the increase in solar activity. We also calculate the PUI thermal pressure, which appears to be roughly consistent with previous results. Through fitting of the solar wind proton peaks in our spectra, we derive solar wind thermal pressures. Based on our analysis, we predict a ratio of PUI thermal pressure to solar wind thermal pressure just inside the termination shock to be between 100 and > 1000.
doi_str_mv 10.1088/0004-637X/768/2/120
format article
fullrecord <record><control><sourceid>proquest_osti_</sourceid><recordid>TN_cdi_osti_scitechconnect_22126754</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>1732820668</sourcerecordid><originalsourceid>FETCH-LOGICAL-c343t-baa1361e04b4fd9d5456f64d887ef31dd8f00377e2f3784c1897f93761ef76593</originalsourceid><addsrcrecordid>eNqN0b1OwzAUBWALgUQpPAGLJRaWEP_Fdsa0mDYiSqo0pcBipYktitqmxOnA25OqiJnp6krfvcM5ANxi9ICRlD5CiHmcildfcOkTHxN0BgY4oNJjNBDnYPAnLsGVc5_HlYThAEzitFD5vFBJEuVwFo-fvcUMxlk6h9lorvIX9QhHqlgqlUKMYZQ-QkJgtICjN5iqJZxmefze62twYcuNMze_cwgWT6oYT70km8TjKPEqymjnrcoSU44NYitm67AOWMAtZ7WUwliK61pahKgQhlgqJKuwDIUNqehPrOBBSIfg7vS3cd1au2rdmeqjanY7U3WaEEy4CFiv7k9q3zZfB-M6vV27ymw25c40B6exEIhITjD-B6VEEsS57Ck90aptnGuN1ft2vS3bb42RPvagj7HqY8q670ET3fdAfwBp_HGS</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1732820668</pqid></control><display><type>article</type><title>INTERSTELLAR PICK-UP IONS OBSERVED BETWEEN 11 AND 22 AU BY NEW HORIZONS</title><source>Free E-Journal (出版社公開部分のみ)</source><creator>Randol, B M ; McComas, D J ; Schwadron, N A</creator><creatorcontrib>Randol, B M ; McComas, D J ; Schwadron, N A</creatorcontrib><description>We report new observations by the Solar Wind Around Pluto instrument on the New Horizons spacecraft, which measures energy per charge (E/q) spectra of solar wind and interstellar pick-up ions (PUIs) between 11 AU and 22 AU from the Sun. The data provide an unprecedented look at PUIs as there have been very few measurements of PUIs beyond 10 AU. We analyzed the PUI part of the spectra by comparing them to the classic Vasyliunas and Siscoe PUI model. Our analysis indicates that PUIs are usually well-described by this distribution. We derive parameters relevant to PUI studies, such as the ionization rate normalized to 1 AU. Our result for the average ionization rate between 11 and 12 AU agrees with an independently derived average value found during the same time. Later, we find a general increase in the ionization rate, which is consistent with the increase in solar activity. We also calculate the PUI thermal pressure, which appears to be roughly consistent with previous results. Through fitting of the solar wind proton peaks in our spectra, we derive solar wind thermal pressures. Based on our analysis, we predict a ratio of PUI thermal pressure to solar wind thermal pressure just inside the termination shock to be between 100 and &gt; 1000.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.1088/0004-637X/768/2/120</identifier><language>eng</language><publisher>United States</publisher><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; ATOMS ; DISTRIBUTION ; HELIOSPHERE ; Interstellar ; Ionization ; Mathematical models ; New Horizons mission ; PEAKS ; PLUTO PLANET ; PROTONS ; Solar activity ; SOLAR WIND ; Spacecraft ; SPECTRA ; SUN</subject><ispartof>The Astrophysical journal, 2013-05, Vol.768 (2), p.1-8</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c343t-baa1361e04b4fd9d5456f64d887ef31dd8f00377e2f3784c1897f93761ef76593</citedby><cites>FETCH-LOGICAL-c343t-baa1361e04b4fd9d5456f64d887ef31dd8f00377e2f3784c1897f93761ef76593</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,27924,27925</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/22126754$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Randol, B M</creatorcontrib><creatorcontrib>McComas, D J</creatorcontrib><creatorcontrib>Schwadron, N A</creatorcontrib><title>INTERSTELLAR PICK-UP IONS OBSERVED BETWEEN 11 AND 22 AU BY NEW HORIZONS</title><title>The Astrophysical journal</title><description>We report new observations by the Solar Wind Around Pluto instrument on the New Horizons spacecraft, which measures energy per charge (E/q) spectra of solar wind and interstellar pick-up ions (PUIs) between 11 AU and 22 AU from the Sun. The data provide an unprecedented look at PUIs as there have been very few measurements of PUIs beyond 10 AU. We analyzed the PUI part of the spectra by comparing them to the classic Vasyliunas and Siscoe PUI model. Our analysis indicates that PUIs are usually well-described by this distribution. We derive parameters relevant to PUI studies, such as the ionization rate normalized to 1 AU. Our result for the average ionization rate between 11 and 12 AU agrees with an independently derived average value found during the same time. Later, we find a general increase in the ionization rate, which is consistent with the increase in solar activity. We also calculate the PUI thermal pressure, which appears to be roughly consistent with previous results. Through fitting of the solar wind proton peaks in our spectra, we derive solar wind thermal pressures. Based on our analysis, we predict a ratio of PUI thermal pressure to solar wind thermal pressure just inside the termination shock to be between 100 and &gt; 1000.</description><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>ATOMS</subject><subject>DISTRIBUTION</subject><subject>HELIOSPHERE</subject><subject>Interstellar</subject><subject>Ionization</subject><subject>Mathematical models</subject><subject>New Horizons mission</subject><subject>PEAKS</subject><subject>PLUTO PLANET</subject><subject>PROTONS</subject><subject>Solar activity</subject><subject>SOLAR WIND</subject><subject>Spacecraft</subject><subject>SPECTRA</subject><subject>SUN</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNqN0b1OwzAUBWALgUQpPAGLJRaWEP_Fdsa0mDYiSqo0pcBipYktitqmxOnA25OqiJnp6krfvcM5ANxi9ICRlD5CiHmcildfcOkTHxN0BgY4oNJjNBDnYPAnLsGVc5_HlYThAEzitFD5vFBJEuVwFo-fvcUMxlk6h9lorvIX9QhHqlgqlUKMYZQ-QkJgtICjN5iqJZxmefze62twYcuNMze_cwgWT6oYT70km8TjKPEqymjnrcoSU44NYitm67AOWMAtZ7WUwliK61pahKgQhlgqJKuwDIUNqehPrOBBSIfg7vS3cd1au2rdmeqjanY7U3WaEEy4CFiv7k9q3zZfB-M6vV27ymw25c40B6exEIhITjD-B6VEEsS57Ck90aptnGuN1ft2vS3bb42RPvagj7HqY8q670ET3fdAfwBp_HGS</recordid><startdate>20130510</startdate><enddate>20130510</enddate><creator>Randol, B M</creator><creator>McComas, D J</creator><creator>Schwadron, N A</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>KL.</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>20130510</creationdate><title>INTERSTELLAR PICK-UP IONS OBSERVED BETWEEN 11 AND 22 AU BY NEW HORIZONS</title><author>Randol, B M ; McComas, D J ; Schwadron, N A</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c343t-baa1361e04b4fd9d5456f64d887ef31dd8f00377e2f3784c1897f93761ef76593</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</topic><topic>ATOMS</topic><topic>DISTRIBUTION</topic><topic>HELIOSPHERE</topic><topic>Interstellar</topic><topic>Ionization</topic><topic>Mathematical models</topic><topic>New Horizons mission</topic><topic>PEAKS</topic><topic>PLUTO PLANET</topic><topic>PROTONS</topic><topic>Solar activity</topic><topic>SOLAR WIND</topic><topic>Spacecraft</topic><topic>SPECTRA</topic><topic>SUN</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Randol, B M</creatorcontrib><creatorcontrib>McComas, D J</creatorcontrib><creatorcontrib>Schwadron, N A</creatorcontrib><collection>CrossRef</collection><collection>Meteorological &amp; Geoastrophysical Abstracts</collection><collection>Meteorological &amp; Geoastrophysical Abstracts - Academic</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Randol, B M</au><au>McComas, D J</au><au>Schwadron, N A</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>INTERSTELLAR PICK-UP IONS OBSERVED BETWEEN 11 AND 22 AU BY NEW HORIZONS</atitle><jtitle>The Astrophysical journal</jtitle><date>2013-05-10</date><risdate>2013</risdate><volume>768</volume><issue>2</issue><spage>1</spage><epage>8</epage><pages>1-8</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><abstract>We report new observations by the Solar Wind Around Pluto instrument on the New Horizons spacecraft, which measures energy per charge (E/q) spectra of solar wind and interstellar pick-up ions (PUIs) between 11 AU and 22 AU from the Sun. The data provide an unprecedented look at PUIs as there have been very few measurements of PUIs beyond 10 AU. We analyzed the PUI part of the spectra by comparing them to the classic Vasyliunas and Siscoe PUI model. Our analysis indicates that PUIs are usually well-described by this distribution. We derive parameters relevant to PUI studies, such as the ionization rate normalized to 1 AU. Our result for the average ionization rate between 11 and 12 AU agrees with an independently derived average value found during the same time. Later, we find a general increase in the ionization rate, which is consistent with the increase in solar activity. We also calculate the PUI thermal pressure, which appears to be roughly consistent with previous results. Through fitting of the solar wind proton peaks in our spectra, we derive solar wind thermal pressures. Based on our analysis, we predict a ratio of PUI thermal pressure to solar wind thermal pressure just inside the termination shock to be between 100 and &gt; 1000.</abstract><cop>United States</cop><doi>10.1088/0004-637X/768/2/120</doi><tpages>8</tpages></addata></record>
fulltext fulltext
identifier ISSN: 0004-637X
ispartof The Astrophysical journal, 2013-05, Vol.768 (2), p.1-8
issn 0004-637X
1538-4357
language eng
recordid cdi_osti_scitechconnect_22126754
source Free E-Journal (出版社公開部分のみ)
subjects ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
ATOMS
DISTRIBUTION
HELIOSPHERE
Interstellar
Ionization
Mathematical models
New Horizons mission
PEAKS
PLUTO PLANET
PROTONS
Solar activity
SOLAR WIND
Spacecraft
SPECTRA
SUN
title INTERSTELLAR PICK-UP IONS OBSERVED BETWEEN 11 AND 22 AU BY NEW HORIZONS
url http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-25T08%3A01%3A46IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_osti_&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=INTERSTELLAR%20PICK-UP%20IONS%20OBSERVED%20BETWEEN%2011%20AND%2022%20AU%20BY%20NEW%20HORIZONS&rft.jtitle=The%20Astrophysical%20journal&rft.au=Randol,%20B%20M&rft.date=2013-05-10&rft.volume=768&rft.issue=2&rft.spage=1&rft.epage=8&rft.pages=1-8&rft.issn=0004-637X&rft.eissn=1538-4357&rft_id=info:doi/10.1088/0004-637X/768/2/120&rft_dat=%3Cproquest_osti_%3E1732820668%3C/proquest_osti_%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c343t-baa1361e04b4fd9d5456f64d887ef31dd8f00377e2f3784c1897f93761ef76593%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_pqid=1732820668&rft_id=info:pmid/&rfr_iscdi=true