ON THE SIMPLE MODELS FOR THE INTERPRETATION OF CENTIMETER-WAVELENGTH RADIO OBSERVATIONS OF ASTEROIDS
The predictions of the two-layer models used to interpret radio spectra of the asteroids have been examined. It is clear that one must treat the models with caution as the physics is highly simplified. Although the predictions are in accord with physical expectations, careful attention to the circum...
Gespeichert in:
| Veröffentlicht in: | Publ. Astron. Soc. Pac.; (United States) 1987-09, Vol.99 (619), p.1009-1013 |
|---|---|
| 1. Verfasser: | |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 1013 |
|---|---|
| container_issue | 619 |
| container_start_page | 1009 |
| container_title | Publ. Astron. Soc. Pac.; (United States) |
| container_volume | 99 |
| creator | WEBSTER, WILLIAM J. |
| description | The predictions of the two-layer models used to interpret radio spectra of the asteroids have been examined. It is clear that one must treat the models with caution as the physics is highly simplified. Although the predictions are in accord with physical expectations, careful attention to the circumstances of the observations is essential. The lack of short-centimeter wavelength measurements of dielectric properties is especially vexing. Some simple improvements to the models based on studies of the lunar radio emission by Keihm and using radar measurements of asteroid surface characteristics by Ostro and colleagues are suggested. Even so, the calculation of a realistic continuum-emission spectrum for asteroidal bodies from 20 cm wavelength to 20 microns wavelength remains a formidable task. |
| doi_str_mv | 10.1086/132069 |
| format | Article |
| fullrecord | <record><control><sourceid>jstor_osti_</sourceid><recordid>TN_cdi_crossref_primary_10_1086_132069</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><jstor_id>40679018</jstor_id><sourcerecordid>40679018</sourcerecordid><originalsourceid>FETCH-LOGICAL-c252t-9d51ecaab1fae43b1654886aaa253851c5afd9992fd54ad13984b6b618c5c4a13</originalsourceid><addsrcrecordid>eNo90E1Pg0AQBuCN0cRa9RdoQozxhu6wH909YrttSSg0gPVIlgViG6UNy8V_Ly2mp0lmnplkXoTuAb8CFvwNiIe5vEAjYES4REzIJRphjKnLPYGv0Y21O4wBBOARKuPIyZbKSYPVOlTOKp6pMHXmcXLqBlGmknWiMj8LehjPnamKsmCl-rb76W9UqKJFtnQSfxbETvyeqmRzounR-mnP4mCW3qKrWn_b6u6_jtHHXGXTpRvGi2Dqh67xmNe5smRQGa0LqHVFSQGcUSG41trrP2FgmK5LKaVXl4zqEogUtOAFB2GYoRrIGD0Nd_e22-bWbLvKfJl901SmyxnHDIjo0cuATLu3tq3q_NBuf3T7mwPOjwHmQ4A9fB7gQVujv-tWN2Zrz3rCGCOU9uxhYI22Om-61uYghcDYk55k_fhxGO9st2_P2xTzicQgyB9NqHeV</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>ON THE SIMPLE MODELS FOR THE INTERPRETATION OF CENTIMETER-WAVELENGTH RADIO OBSERVATIONS OF ASTEROIDS</title><source>Jstor Complete Legacy</source><source>IOP Publishing Journals</source><source>NASA Technical Reports Server</source><source>Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals</source><source>Institute of Physics (IOP) Journals - HEAL-Link</source><source>Alma/SFX Local Collection</source><creator>WEBSTER, WILLIAM J.</creator><creatorcontrib>WEBSTER, WILLIAM J. ; NASA, Goddard Space Flight Center, Greenbelt, MD</creatorcontrib><description>The predictions of the two-layer models used to interpret radio spectra of the asteroids have been examined. It is clear that one must treat the models with caution as the physics is highly simplified. Although the predictions are in accord with physical expectations, careful attention to the circumstances of the observations is essential. The lack of short-centimeter wavelength measurements of dielectric properties is especially vexing. Some simple improvements to the models based on studies of the lunar radio emission by Keihm and using radar measurements of asteroid surface characteristics by Ostro and colleagues are suggested. Even so, the calculation of a realistic continuum-emission spectrum for asteroidal bodies from 20 cm wavelength to 20 microns wavelength remains a formidable task.</description><identifier>ISSN: 0004-6280</identifier><identifier>EISSN: 1538-3873</identifier><identifier>DOI: 10.1086/132069</identifier><identifier>CODEN: PASPAU</identifier><language>eng</language><publisher>Legacy CDMS: The Astronomical Society of the Pacific</publisher><subject>640107 - Astrophysics & Cosmology- Planetary Phenomena ; ASTEROIDS ; Asteroids (minor planets) ; Astronomy ; Basalt ; Brightness temperature ; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ; DIELECTRIC PROPERTIES ; Earth, ocean, space ; ELECTRICAL PROPERTIES ; ELECTROMAGNETIC RADIATION ; Emissivity ; Exact sciences and technology ; Lunar dust ; MATHEMATICAL MODELS ; Modeling ; PHYSICAL PROPERTIES ; Planets, their satellites and rings. Asteroids ; RADIATIONS ; Radio spectrum ; RADIOWAVE RADIATION ; Rotation ; Solar system ; SURFACE PROPERTIES ; TEMPERATURE DISTRIBUTION ; Wavelengths</subject><ispartof>Publ. Astron. Soc. Pac.; (United States), 1987-09, Vol.99 (619), p.1009-1013</ispartof><rights>1988 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c252t-9d51ecaab1fae43b1654886aaa253851c5afd9992fd54ad13984b6b618c5c4a13</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/40679018$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/40679018$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,776,780,799,881,27901,27902,57992,58225</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=7555344$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/5605138$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>WEBSTER, WILLIAM J.</creatorcontrib><creatorcontrib>NASA, Goddard Space Flight Center, Greenbelt, MD</creatorcontrib><title>ON THE SIMPLE MODELS FOR THE INTERPRETATION OF CENTIMETER-WAVELENGTH RADIO OBSERVATIONS OF ASTEROIDS</title><title>Publ. Astron. Soc. Pac.; (United States)</title><description>The predictions of the two-layer models used to interpret radio spectra of the asteroids have been examined. It is clear that one must treat the models with caution as the physics is highly simplified. Although the predictions are in accord with physical expectations, careful attention to the circumstances of the observations is essential. The lack of short-centimeter wavelength measurements of dielectric properties is especially vexing. Some simple improvements to the models based on studies of the lunar radio emission by Keihm and using radar measurements of asteroid surface characteristics by Ostro and colleagues are suggested. Even so, the calculation of a realistic continuum-emission spectrum for asteroidal bodies from 20 cm wavelength to 20 microns wavelength remains a formidable task.</description><subject>640107 - Astrophysics & Cosmology- Planetary Phenomena</subject><subject>ASTEROIDS</subject><subject>Asteroids (minor planets)</subject><subject>Astronomy</subject><subject>Basalt</subject><subject>Brightness temperature</subject><subject>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</subject><subject>DIELECTRIC PROPERTIES</subject><subject>Earth, ocean, space</subject><subject>ELECTRICAL PROPERTIES</subject><subject>ELECTROMAGNETIC RADIATION</subject><subject>Emissivity</subject><subject>Exact sciences and technology</subject><subject>Lunar dust</subject><subject>MATHEMATICAL MODELS</subject><subject>Modeling</subject><subject>PHYSICAL PROPERTIES</subject><subject>Planets, their satellites and rings. Asteroids</subject><subject>RADIATIONS</subject><subject>Radio spectrum</subject><subject>RADIOWAVE RADIATION</subject><subject>Rotation</subject><subject>Solar system</subject><subject>SURFACE PROPERTIES</subject><subject>TEMPERATURE DISTRIBUTION</subject><subject>Wavelengths</subject><issn>0004-6280</issn><issn>1538-3873</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1987</creationdate><recordtype>article</recordtype><sourceid>CYI</sourceid><recordid>eNo90E1Pg0AQBuCN0cRa9RdoQozxhu6wH909YrttSSg0gPVIlgViG6UNy8V_Ly2mp0lmnplkXoTuAb8CFvwNiIe5vEAjYES4REzIJRphjKnLPYGv0Y21O4wBBOARKuPIyZbKSYPVOlTOKp6pMHXmcXLqBlGmknWiMj8LehjPnamKsmCl-rb76W9UqKJFtnQSfxbETvyeqmRzounR-mnP4mCW3qKrWn_b6u6_jtHHXGXTpRvGi2Dqh67xmNe5smRQGa0LqHVFSQGcUSG41trrP2FgmK5LKaVXl4zqEogUtOAFB2GYoRrIGD0Nd_e22-bWbLvKfJl901SmyxnHDIjo0cuATLu3tq3q_NBuf3T7mwPOjwHmQ4A9fB7gQVujv-tWN2Zrz3rCGCOU9uxhYI22Om-61uYghcDYk55k_fhxGO9st2_P2xTzicQgyB9NqHeV</recordid><startdate>19870901</startdate><enddate>19870901</enddate><creator>WEBSTER, WILLIAM J.</creator><general>The Astronomical Society of the Pacific</general><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>19870901</creationdate><title>ON THE SIMPLE MODELS FOR THE INTERPRETATION OF CENTIMETER-WAVELENGTH RADIO OBSERVATIONS OF ASTEROIDS</title><author>WEBSTER, WILLIAM J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c252t-9d51ecaab1fae43b1654886aaa253851c5afd9992fd54ad13984b6b618c5c4a13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1987</creationdate><topic>640107 - Astrophysics & Cosmology- Planetary Phenomena</topic><topic>ASTEROIDS</topic><topic>Asteroids (minor planets)</topic><topic>Astronomy</topic><topic>Basalt</topic><topic>Brightness temperature</topic><topic>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</topic><topic>DIELECTRIC PROPERTIES</topic><topic>Earth, ocean, space</topic><topic>ELECTRICAL PROPERTIES</topic><topic>ELECTROMAGNETIC RADIATION</topic><topic>Emissivity</topic><topic>Exact sciences and technology</topic><topic>Lunar dust</topic><topic>MATHEMATICAL MODELS</topic><topic>Modeling</topic><topic>PHYSICAL PROPERTIES</topic><topic>Planets, their satellites and rings. Asteroids</topic><topic>RADIATIONS</topic><topic>Radio spectrum</topic><topic>RADIOWAVE RADIATION</topic><topic>Rotation</topic><topic>Solar system</topic><topic>SURFACE PROPERTIES</topic><topic>TEMPERATURE DISTRIBUTION</topic><topic>Wavelengths</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>WEBSTER, WILLIAM J.</creatorcontrib><creatorcontrib>NASA, Goddard Space Flight Center, Greenbelt, MD</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>Publ. Astron. Soc. Pac.; (United States)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>WEBSTER, WILLIAM J.</au><aucorp>NASA, Goddard Space Flight Center, Greenbelt, MD</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>ON THE SIMPLE MODELS FOR THE INTERPRETATION OF CENTIMETER-WAVELENGTH RADIO OBSERVATIONS OF ASTEROIDS</atitle><jtitle>Publ. Astron. Soc. Pac.; (United States)</jtitle><date>1987-09-01</date><risdate>1987</risdate><volume>99</volume><issue>619</issue><spage>1009</spage><epage>1013</epage><pages>1009-1013</pages><issn>0004-6280</issn><eissn>1538-3873</eissn><coden>PASPAU</coden><abstract>The predictions of the two-layer models used to interpret radio spectra of the asteroids have been examined. It is clear that one must treat the models with caution as the physics is highly simplified. Although the predictions are in accord with physical expectations, careful attention to the circumstances of the observations is essential. The lack of short-centimeter wavelength measurements of dielectric properties is especially vexing. Some simple improvements to the models based on studies of the lunar radio emission by Keihm and using radar measurements of asteroid surface characteristics by Ostro and colleagues are suggested. Even so, the calculation of a realistic continuum-emission spectrum for asteroidal bodies from 20 cm wavelength to 20 microns wavelength remains a formidable task.</abstract><cop>Legacy CDMS</cop><pub>The Astronomical Society of the Pacific</pub><doi>10.1086/132069</doi><tpages>5</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0004-6280 |
| ispartof | Publ. Astron. Soc. Pac.; (United States), 1987-09, Vol.99 (619), p.1009-1013 |
| issn | 0004-6280 1538-3873 |
| language | eng |
| recordid | cdi_crossref_primary_10_1086_132069 |
| source | Jstor Complete Legacy; IOP Publishing Journals; NASA Technical Reports Server; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Institute of Physics (IOP) Journals - HEAL-Link; Alma/SFX Local Collection |
| subjects | 640107 - Astrophysics & Cosmology- Planetary Phenomena ASTEROIDS Asteroids (minor planets) Astronomy Basalt Brightness temperature CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS DIELECTRIC PROPERTIES Earth, ocean, space ELECTRICAL PROPERTIES ELECTROMAGNETIC RADIATION Emissivity Exact sciences and technology Lunar dust MATHEMATICAL MODELS Modeling PHYSICAL PROPERTIES Planets, their satellites and rings. Asteroids RADIATIONS Radio spectrum RADIOWAVE RADIATION Rotation Solar system SURFACE PROPERTIES TEMPERATURE DISTRIBUTION Wavelengths |
| title | ON THE SIMPLE MODELS FOR THE INTERPRETATION OF CENTIMETER-WAVELENGTH RADIO OBSERVATIONS OF ASTEROIDS |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-14T04%3A56%3A00IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-jstor_osti_&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=ON%20THE%20SIMPLE%20MODELS%20FOR%20THE%20INTERPRETATION%20OF%20CENTIMETER-WAVELENGTH%20RADIO%20OBSERVATIONS%20OF%20ASTEROIDS&rft.jtitle=Publ.%20Astron.%20Soc.%20Pac.;%20(United%20States)&rft.au=WEBSTER,%20WILLIAM%20J.&rft.aucorp=NASA,%20Goddard%20Space%20Flight%20Center,%20Greenbelt,%20MD&rft.date=1987-09-01&rft.volume=99&rft.issue=619&rft.spage=1009&rft.epage=1013&rft.pages=1009-1013&rft.issn=0004-6280&rft.eissn=1538-3873&rft.coden=PASPAU&rft_id=info:doi/10.1086/132069&rft_dat=%3Cjstor_osti_%3E40679018%3C/jstor_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/&rft_jstor_id=40679018&rfr_iscdi=true |