Abundances in Comet Halley at the time of the spacecraft encounters
Spectrophotometric observations of Comet Halley obtained in March 1986 at the time of the spacecraft encounters with the comet are described, and the column densities derived from the integrated emission band fluxes are presented. The scale lengths are determined from the spatial profiles of the obs...
Gespeichert in:
| Veröffentlicht in: | Astrophys. J.; (United States) 1988-02, Vol.325 (2), p.927-938 |
|---|---|
| Hauptverfasser: | , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 938 |
|---|---|
| container_issue | 2 |
| container_start_page | 927 |
| container_title | Astrophys. J.; (United States) |
| container_volume | 325 |
| creator | Wyckoff, Susan Tegler, Stephen Wehinger, Peter A. Spinard, Hyron Belton, Michael J. S. |
| description | Spectrophotometric observations of Comet Halley obtained in March 1986 at the time of the spacecraft encounters with the comet are described, and the column densities derived from the integrated emission band fluxes are presented. The scale lengths are determined from the spatial profiles of the observed species. Production rates are derived and the parent identities and abundance ratios of the studied species are discussed. The data indicate that the abundance of the primordial condensate NH3 comprises about 0.2 percent of the total volatile fraction of the comet nucleus. The ratio of production rates Q(NH2)/Q(H2O) = 0.003 indicates that Q(NH3)/Q(H2O) is roughly 0.3 percent, which is nearly 10 times lower than the value determined from Giotto ion mass spectrometer data. The production rate Q(CH)/Q(H2O) of 0.007 and the CH spatial profile indicate that CH cannot derive entirely from direct photodissociation of CH4. |
| doi_str_mv | 10.1086/166064 |
| format | Article |
| fullrecord | <record><control><sourceid>nasa_osti_</sourceid><recordid>TN_cdi_crossref_primary_10_1086_166064</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>19880044664</sourcerecordid><originalsourceid>FETCH-LOGICAL-c230t-36d49441d1793869ad07bbd29fba7b31724330c26b8ac9aacc61535d5c3030183</originalsourceid><addsrcrecordid>eNo9kMFKxDAQhoMouK76BB6CiLdq0qRJc5SirrDgRcFbmE5TttJNlyR72Lc3a0UYmBn4-Jn5CLnm7IGzWj1ypZiSJ2TBK1EXUlT6lCwYY7JQQn-dk4sYv49racyCNE_t3nfg0UU6eNpMW5foCsbRHSgkmjaOpmHr6NT_znEH6DBAn6jzOO19ciFekrMexuiu_vqSfL48fzSrYv3--tY8rQssBUuFUJ00UvKOayNqZaBjum270vQt6FZwXUohGJaqrQENAKLKH1RdhYIJxmuxJLdz7hTTYCMOyeEGJ-8dJqvLiufK0P0MYZhiDK63uzBsIRwsZ_box85-Mng3gzuICGMfsoQh_tNaKZ1PytjNjHmIYH0K0XJT19mfVDnlBwDEajY</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Abundances in Comet Halley at the time of the spacecraft encounters</title><source>NASA Technical Reports Server</source><source>Alma/SFX Local Collection</source><creator>Wyckoff, Susan ; Tegler, Stephen ; Wehinger, Peter A. ; Spinard, Hyron ; Belton, Michael J. S.</creator><creatorcontrib>Wyckoff, Susan ; Tegler, Stephen ; Wehinger, Peter A. ; Spinard, Hyron ; Belton, Michael J. S. ; Kitt Peak National Observatory, Tucson, AZ (USA) ; Arizona State Univ., Tempe (USA) ; California Univ., Berkeley (USA)</creatorcontrib><description>Spectrophotometric observations of Comet Halley obtained in March 1986 at the time of the spacecraft encounters with the comet are described, and the column densities derived from the integrated emission band fluxes are presented. The scale lengths are determined from the spatial profiles of the observed species. Production rates are derived and the parent identities and abundance ratios of the studied species are discussed. The data indicate that the abundance of the primordial condensate NH3 comprises about 0.2 percent of the total volatile fraction of the comet nucleus. The ratio of production rates Q(NH2)/Q(H2O) = 0.003 indicates that Q(NH3)/Q(H2O) is roughly 0.3 percent, which is nearly 10 times lower than the value determined from Giotto ion mass spectrometer data. The production rate Q(CH)/Q(H2O) of 0.007 and the CH spatial profile indicate that CH cannot derive entirely from direct photodissociation of CH4.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.1086/166064</identifier><identifier>CODEN: ASJOAB</identifier><language>eng</language><publisher>Legacy CDMS: University of Chicago Press</publisher><subject>640107 - Astrophysics & Cosmology- Planetary Phenomena ; ABUNDANCE ; ACCRETION DISKS ; ALKANES ; AMMONIA ; Astronomy ; Astrophysics ; CHEMICAL COMPOSITION ; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ; COMETS ; DISTRIBUTION ; Earth, ocean, space ; Exact sciences and technology ; HALLEY COMET ; HYDRIDES ; HYDROCARBONS ; HYDROGEN COMPOUNDS ; Interplanetary space ; METHANE ; NITROGEN COMPOUNDS ; NITROGEN HYDRIDES ; ORGANIC COMPOUNDS ; OXYGEN COMPOUNDS ; Solar system ; SPATIAL DISTRIBUTION ; SPECTROPHOTOMETRY ; WATER</subject><ispartof>Astrophys. J.; (United States), 1988-02, Vol.325 (2), p.927-938</ispartof><rights>1988 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c230t-36d49441d1793869ad07bbd29fba7b31724330c26b8ac9aacc61535d5c3030183</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,881,27901,27902</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=7667172$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/7251251$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Wyckoff, Susan</creatorcontrib><creatorcontrib>Tegler, Stephen</creatorcontrib><creatorcontrib>Wehinger, Peter A.</creatorcontrib><creatorcontrib>Spinard, Hyron</creatorcontrib><creatorcontrib>Belton, Michael J. S.</creatorcontrib><creatorcontrib>Kitt Peak National Observatory, Tucson, AZ (USA)</creatorcontrib><creatorcontrib>Arizona State Univ., Tempe (USA)</creatorcontrib><creatorcontrib>California Univ., Berkeley (USA)</creatorcontrib><title>Abundances in Comet Halley at the time of the spacecraft encounters</title><title>Astrophys. J.; (United States)</title><description>Spectrophotometric observations of Comet Halley obtained in March 1986 at the time of the spacecraft encounters with the comet are described, and the column densities derived from the integrated emission band fluxes are presented. The scale lengths are determined from the spatial profiles of the observed species. Production rates are derived and the parent identities and abundance ratios of the studied species are discussed. The data indicate that the abundance of the primordial condensate NH3 comprises about 0.2 percent of the total volatile fraction of the comet nucleus. The ratio of production rates Q(NH2)/Q(H2O) = 0.003 indicates that Q(NH3)/Q(H2O) is roughly 0.3 percent, which is nearly 10 times lower than the value determined from Giotto ion mass spectrometer data. The production rate Q(CH)/Q(H2O) of 0.007 and the CH spatial profile indicate that CH cannot derive entirely from direct photodissociation of CH4.</description><subject>640107 - Astrophysics & Cosmology- Planetary Phenomena</subject><subject>ABUNDANCE</subject><subject>ACCRETION DISKS</subject><subject>ALKANES</subject><subject>AMMONIA</subject><subject>Astronomy</subject><subject>Astrophysics</subject><subject>CHEMICAL COMPOSITION</subject><subject>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</subject><subject>COMETS</subject><subject>DISTRIBUTION</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>HALLEY COMET</subject><subject>HYDRIDES</subject><subject>HYDROCARBONS</subject><subject>HYDROGEN COMPOUNDS</subject><subject>Interplanetary space</subject><subject>METHANE</subject><subject>NITROGEN COMPOUNDS</subject><subject>NITROGEN HYDRIDES</subject><subject>ORGANIC COMPOUNDS</subject><subject>OXYGEN COMPOUNDS</subject><subject>Solar system</subject><subject>SPATIAL DISTRIBUTION</subject><subject>SPECTROPHOTOMETRY</subject><subject>WATER</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1988</creationdate><recordtype>article</recordtype><sourceid>CYI</sourceid><recordid>eNo9kMFKxDAQhoMouK76BB6CiLdq0qRJc5SirrDgRcFbmE5TttJNlyR72Lc3a0UYmBn4-Jn5CLnm7IGzWj1ypZiSJ2TBK1EXUlT6lCwYY7JQQn-dk4sYv49racyCNE_t3nfg0UU6eNpMW5foCsbRHSgkmjaOpmHr6NT_znEH6DBAn6jzOO19ciFekrMexuiu_vqSfL48fzSrYv3--tY8rQssBUuFUJ00UvKOayNqZaBjum270vQt6FZwXUohGJaqrQENAKLKH1RdhYIJxmuxJLdz7hTTYCMOyeEGJ-8dJqvLiufK0P0MYZhiDK63uzBsIRwsZ_box85-Mng3gzuICGMfsoQh_tNaKZ1PytjNjHmIYH0K0XJT19mfVDnlBwDEajY</recordid><startdate>19880215</startdate><enddate>19880215</enddate><creator>Wyckoff, Susan</creator><creator>Tegler, Stephen</creator><creator>Wehinger, Peter A.</creator><creator>Spinard, Hyron</creator><creator>Belton, Michael J. S.</creator><general>University of Chicago Press</general><scope>CYE</scope><scope>CYI</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>19880215</creationdate><title>Abundances in Comet Halley at the time of the spacecraft encounters</title><author>Wyckoff, Susan ; Tegler, Stephen ; Wehinger, Peter A. ; Spinard, Hyron ; Belton, Michael J. S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c230t-36d49441d1793869ad07bbd29fba7b31724330c26b8ac9aacc61535d5c3030183</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1988</creationdate><topic>640107 - Astrophysics & Cosmology- Planetary Phenomena</topic><topic>ABUNDANCE</topic><topic>ACCRETION DISKS</topic><topic>ALKANES</topic><topic>AMMONIA</topic><topic>Astronomy</topic><topic>Astrophysics</topic><topic>CHEMICAL COMPOSITION</topic><topic>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</topic><topic>COMETS</topic><topic>DISTRIBUTION</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>HALLEY COMET</topic><topic>HYDRIDES</topic><topic>HYDROCARBONS</topic><topic>HYDROGEN COMPOUNDS</topic><topic>Interplanetary space</topic><topic>METHANE</topic><topic>NITROGEN COMPOUNDS</topic><topic>NITROGEN HYDRIDES</topic><topic>ORGANIC COMPOUNDS</topic><topic>OXYGEN COMPOUNDS</topic><topic>Solar system</topic><topic>SPATIAL DISTRIBUTION</topic><topic>SPECTROPHOTOMETRY</topic><topic>WATER</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wyckoff, Susan</creatorcontrib><creatorcontrib>Tegler, Stephen</creatorcontrib><creatorcontrib>Wehinger, Peter A.</creatorcontrib><creatorcontrib>Spinard, Hyron</creatorcontrib><creatorcontrib>Belton, Michael J. S.</creatorcontrib><creatorcontrib>Kitt Peak National Observatory, Tucson, AZ (USA)</creatorcontrib><creatorcontrib>Arizona State Univ., Tempe (USA)</creatorcontrib><creatorcontrib>California Univ., Berkeley (USA)</creatorcontrib><collection>NASA Scientific and Technical Information</collection><collection>NASA Technical Reports Server</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Astrophys. J.; (United States)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wyckoff, Susan</au><au>Tegler, Stephen</au><au>Wehinger, Peter A.</au><au>Spinard, Hyron</au><au>Belton, Michael J. S.</au><aucorp>Kitt Peak National Observatory, Tucson, AZ (USA)</aucorp><aucorp>Arizona State Univ., Tempe (USA)</aucorp><aucorp>California Univ., Berkeley (USA)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Abundances in Comet Halley at the time of the spacecraft encounters</atitle><jtitle>Astrophys. J.; (United States)</jtitle><date>1988-02-15</date><risdate>1988</risdate><volume>325</volume><issue>2</issue><spage>927</spage><epage>938</epage><pages>927-938</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><coden>ASJOAB</coden><abstract>Spectrophotometric observations of Comet Halley obtained in March 1986 at the time of the spacecraft encounters with the comet are described, and the column densities derived from the integrated emission band fluxes are presented. The scale lengths are determined from the spatial profiles of the observed species. Production rates are derived and the parent identities and abundance ratios of the studied species are discussed. The data indicate that the abundance of the primordial condensate NH3 comprises about 0.2 percent of the total volatile fraction of the comet nucleus. The ratio of production rates Q(NH2)/Q(H2O) = 0.003 indicates that Q(NH3)/Q(H2O) is roughly 0.3 percent, which is nearly 10 times lower than the value determined from Giotto ion mass spectrometer data. The production rate Q(CH)/Q(H2O) of 0.007 and the CH spatial profile indicate that CH cannot derive entirely from direct photodissociation of CH4.</abstract><cop>Legacy CDMS</cop><pub>University of Chicago Press</pub><doi>10.1086/166064</doi><tpages>12</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0004-637X |
| ispartof | Astrophys. J.; (United States), 1988-02, Vol.325 (2), p.927-938 |
| issn | 0004-637X 1538-4357 |
| language | eng |
| recordid | cdi_crossref_primary_10_1086_166064 |
| source | NASA Technical Reports Server; Alma/SFX Local Collection |
| subjects | 640107 - Astrophysics & Cosmology- Planetary Phenomena ABUNDANCE ACCRETION DISKS ALKANES AMMONIA Astronomy Astrophysics CHEMICAL COMPOSITION CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COMETS DISTRIBUTION Earth, ocean, space Exact sciences and technology HALLEY COMET HYDRIDES HYDROCARBONS HYDROGEN COMPOUNDS Interplanetary space METHANE NITROGEN COMPOUNDS NITROGEN HYDRIDES ORGANIC COMPOUNDS OXYGEN COMPOUNDS Solar system SPATIAL DISTRIBUTION SPECTROPHOTOMETRY WATER |
| title | Abundances in Comet Halley at the time of the spacecraft encounters |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-11T10%3A09%3A29IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-nasa_osti_&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Abundances%20in%20Comet%20Halley%20at%20the%20time%20of%20the%20spacecraft%20encounters&rft.jtitle=Astrophys.%20J.;%20(United%20States)&rft.au=Wyckoff,%20Susan&rft.aucorp=Kitt%20Peak%20National%20Observatory,%20Tucson,%20AZ%20(USA)&rft.date=1988-02-15&rft.volume=325&rft.issue=2&rft.spage=927&rft.epage=938&rft.pages=927-938&rft.issn=0004-637X&rft.eissn=1538-4357&rft.coden=ASJOAB&rft_id=info:doi/10.1086/166064&rft_dat=%3Cnasa_osti_%3E19880044664%3C/nasa_osti_%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |