DUST FROM COMET 209P/LINEAR DURING ITS 2014 RETURN: PARENT BODY OF A NEW METEOR SHOWER, THE MAY CAMELOPARDALIDS
We report a new observation of the Jupiter family comet 209P/LINEAR during its 2014 return. The comet is recognized as a dust source of a new meteor shower, the May Camelopardalids. 209P/LINEAR was apparently inactive at a heliocentric distance r sub(h)= 1.6 AU and showed weak activity at r sub(h)&l...
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| Veröffentlicht in: | Astrophysical journal. Letters 2015-01, Vol.798 (2), p.1-6 |
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| container_title | Astrophysical journal. Letters |
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| creator | Ishiguro, Masateru Kuroda, Daisuke Hanayama, Hidekazu Takahashi, Jun Hasegawa, Sunao Sarugaku, Yuki Watanabe, Makoto Imai, Masataka Goda, Shuhei Akitaya, Hiroshi |
| description | We report a new observation of the Jupiter family comet 209P/LINEAR during its 2014 return. The comet is recognized as a dust source of a new meteor shower, the May Camelopardalids. 209P/LINEAR was apparently inactive at a heliocentric distance r sub(h)= 1.6 AU and showed weak activity at r sub(h)< 1.4 AU. We found an active region of |
| doi_str_mv | 10.1088/2041-8205/798/2/L34 |
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The comet is recognized as a dust source of a new meteor shower, the May Camelopardalids. 209P/LINEAR was apparently inactive at a heliocentric distance r sub(h)= 1.6 AU and showed weak activity at r sub(h)< 1.4 AU. We found an active region of <0.001% of the entire nuclear surface during the comet's dormant phase. An edge-on image suggests that particles up to 1 cm in size (with an uncertainty of factor 3-5) were ejected following a differential power-law size distribution with index q = -3.25 + or - 0.10. We derived a mass-loss rate of 2-10 kg s super(-1) during the active phase and a total mass of [asymptotically =]5 x 10 super(7) kg during the 2014 return. The ejection terminal velocity of millimeter- to centimeter-sized particles was 1-4 ms super(-1), which is comparable to the escape velocity from the nucleus (1.4 m s super(-1)). These results imply that such large meteoric particles marginally escaped from the highly dormant comet nucleus via the gas drag force only within a few months of the perihelion passage.</description><identifier>ISSN: 2041-8213</identifier><identifier>ISSN: 2041-8205</identifier><identifier>EISSN: 2041-8213</identifier><identifier>DOI: 10.1088/2041-8205/798/2/L34</identifier><language>eng</language><publisher>United States: Bristol : IOP Publishing</publisher><subject>ASTRONOMY ; ASTROPHYSICS ; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; Asymptotic properties ; Aérospatiale, astronomie & astrophysique ; Comet nuclei ; COMETS ; comets: individual: 209P/LINEAR ; COMPARATIVE EVALUATIONS ; COSMIC DUST ; COSMIC SHOWERS ; Dust ; Ejection ; interplanetary medium ; JUPITER PLANET ; MASS TRANSFER ; Meteoroid showers ; METEOROIDS ; Particle size distribution ; Physical, chemical, mathematical & earth Sciences ; Physique, chimie, mathématiques & sciences de la terre ; Sciences of the Universe ; Space science, astronomy & astrophysics ; STELLAR WINDS ; Surface chemistry ; SURFACES</subject><ispartof>Astrophysical journal. 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Letters</title><description>We report a new observation of the Jupiter family comet 209P/LINEAR during its 2014 return. The comet is recognized as a dust source of a new meteor shower, the May Camelopardalids. 209P/LINEAR was apparently inactive at a heliocentric distance r sub(h)= 1.6 AU and showed weak activity at r sub(h)< 1.4 AU. We found an active region of <0.001% of the entire nuclear surface during the comet's dormant phase. An edge-on image suggests that particles up to 1 cm in size (with an uncertainty of factor 3-5) were ejected following a differential power-law size distribution with index q = -3.25 + or - 0.10. We derived a mass-loss rate of 2-10 kg s super(-1) during the active phase and a total mass of [asymptotically =]5 x 10 super(7) kg during the 2014 return. The ejection terminal velocity of millimeter- to centimeter-sized particles was 1-4 ms super(-1), which is comparable to the escape velocity from the nucleus (1.4 m s super(-1)). These results imply that such large meteoric particles marginally escaped from the highly dormant comet nucleus via the gas drag force only within a few months of the perihelion passage.</description><subject>ASTRONOMY</subject><subject>ASTROPHYSICS</subject><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>Asymptotic properties</subject><subject>Aérospatiale, astronomie & astrophysique</subject><subject>Comet nuclei</subject><subject>COMETS</subject><subject>comets: individual: 209P/LINEAR</subject><subject>COMPARATIVE EVALUATIONS</subject><subject>COSMIC DUST</subject><subject>COSMIC SHOWERS</subject><subject>Dust</subject><subject>Ejection</subject><subject>interplanetary medium</subject><subject>JUPITER PLANET</subject><subject>MASS TRANSFER</subject><subject>Meteoroid showers</subject><subject>METEOROIDS</subject><subject>Particle size distribution</subject><subject>Physical, chemical, mathematical & earth Sciences</subject><subject>Physique, chimie, mathématiques & sciences de la terre</subject><subject>Sciences of the Universe</subject><subject>Space science, astronomy & astrophysics</subject><subject>STELLAR WINDS</subject><subject>Surface chemistry</subject><subject>SURFACES</subject><issn>2041-8213</issn><issn>2041-8205</issn><issn>2041-8213</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNqNkl9r2zAUxcXYYF22T7AXwV42aBr9sWVpb16sNAbHLo5D6ZOQFbn1cOPOcgr99lXmsvWxT_few_ldXdAB4CtGFxhxviAowHNOULiIhJ8WGQ3egbMXFdP3r_qP4JNzvxEiiGF-Bvpkt63gqiw2cFlsZAUJEleLLM1lXMJkV6b5JUyrrZdxAEtZ7cr8J7yKS5lX8FeR3MBiBWOYy2voYVmUcLsurmV5Dqu1hJv4Bi7jjcwKTyRxlibbz-BDoztnv7zUGditZLVcz7PiMl3G2VyHlI5zqllDRc33dYNrIVDIQkPwPmwawRGhoUA4qq1Ggoio0QGiOrDGahPtMWOGWzoD36a9vRtb5Uw7WnNn-sPBmlERQlnA_EMzQCdX19pbq_qhbtUjUb1up_7Y3SptVG09wrjCEQsC7qkfE3WnO_UwtPd6ePrLrONMnTSECaKIikfsvd8n78PQ_zlaN6r71hnbdfpg-6PzKwUlEQsJf4M1ojwgEcX_7zZD79xgm39nYKROiVCn_1anRCifCEWUTwR9Bs9Km4U</recordid><startdate>20150110</startdate><enddate>20150110</enddate><creator>Ishiguro, Masateru</creator><creator>Kuroda, Daisuke</creator><creator>Hanayama, Hidekazu</creator><creator>Takahashi, Jun</creator><creator>Hasegawa, Sunao</creator><creator>Sarugaku, Yuki</creator><creator>Watanabe, Makoto</creator><creator>Imai, Masataka</creator><creator>Goda, Shuhei</creator><creator>Akitaya, Hiroshi</creator><general>Bristol : IOP Publishing</general><general>Institute of Physics Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>KL.</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>1XC</scope><scope>VOOES</scope><scope>Q33</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0001-7249-6787</orcidid><orcidid>https://orcid.org/0000-0002-7332-2479</orcidid><orcidid>https://orcid.org/0000-0001-8221-6048</orcidid><orcidid>https://orcid.org/0000-0003-4391-4446</orcidid><orcidid>https://orcid.org/0000-0003-3844-1517</orcidid><orcidid>https://orcid.org/0000-0003-1462-7739</orcidid><orcidid>https://orcid.org/0000-0002-7363-187X</orcidid><orcidid>https://orcid.org/0000-0001-8923-488X</orcidid><orcidid>https://orcid.org/0000-0001-6366-2608</orcidid><orcidid>https://orcid.org/0000-0002-9948-1646</orcidid><orcidid>https://orcid.org/0000-0002-3656-4081</orcidid></search><sort><creationdate>20150110</creationdate><title>DUST FROM COMET 209P/LINEAR DURING ITS 2014 RETURN: PARENT BODY OF A NEW METEOR SHOWER, THE MAY CAMELOPARDALIDS</title><author>Ishiguro, Masateru ; 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Letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ishiguro, Masateru</au><au>Kuroda, Daisuke</au><au>Hanayama, Hidekazu</au><au>Takahashi, Jun</au><au>Hasegawa, Sunao</au><au>Sarugaku, Yuki</au><au>Watanabe, Makoto</au><au>Imai, Masataka</au><au>Goda, Shuhei</au><au>Akitaya, Hiroshi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>DUST FROM COMET 209P/LINEAR DURING ITS 2014 RETURN: PARENT BODY OF A NEW METEOR SHOWER, THE MAY CAMELOPARDALIDS</atitle><jtitle>Astrophysical journal. Letters</jtitle><date>2015-01-10</date><risdate>2015</risdate><volume>798</volume><issue>2</issue><spage>1</spage><epage>6</epage><pages>1-6</pages><issn>2041-8213</issn><issn>2041-8205</issn><eissn>2041-8213</eissn><abstract>We report a new observation of the Jupiter family comet 209P/LINEAR during its 2014 return. The comet is recognized as a dust source of a new meteor shower, the May Camelopardalids. 209P/LINEAR was apparently inactive at a heliocentric distance r sub(h)= 1.6 AU and showed weak activity at r sub(h)< 1.4 AU. We found an active region of <0.001% of the entire nuclear surface during the comet's dormant phase. An edge-on image suggests that particles up to 1 cm in size (with an uncertainty of factor 3-5) were ejected following a differential power-law size distribution with index q = -3.25 + or - 0.10. We derived a mass-loss rate of 2-10 kg s super(-1) during the active phase and a total mass of [asymptotically =]5 x 10 super(7) kg during the 2014 return. The ejection terminal velocity of millimeter- to centimeter-sized particles was 1-4 ms super(-1), which is comparable to the escape velocity from the nucleus (1.4 m s super(-1)). These results imply that such large meteoric particles marginally escaped from the highly dormant comet nucleus via the gas drag force only within a few months of the perihelion passage.</abstract><cop>United States</cop><pub>Bristol : IOP Publishing</pub><doi>10.1088/2041-8205/798/2/L34</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0001-7249-6787</orcidid><orcidid>https://orcid.org/0000-0002-7332-2479</orcidid><orcidid>https://orcid.org/0000-0001-8221-6048</orcidid><orcidid>https://orcid.org/0000-0003-4391-4446</orcidid><orcidid>https://orcid.org/0000-0003-3844-1517</orcidid><orcidid>https://orcid.org/0000-0003-1462-7739</orcidid><orcidid>https://orcid.org/0000-0002-7363-187X</orcidid><orcidid>https://orcid.org/0000-0001-8923-488X</orcidid><orcidid>https://orcid.org/0000-0001-6366-2608</orcidid><orcidid>https://orcid.org/0000-0002-9948-1646</orcidid><orcidid>https://orcid.org/0000-0002-3656-4081</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | ASTRONOMY ASTROPHYSICS ASTROPHYSICS, COSMOLOGY AND ASTRONOMY Asymptotic properties Aérospatiale, astronomie & astrophysique Comet nuclei COMETS comets: individual: 209P/LINEAR COMPARATIVE EVALUATIONS COSMIC DUST COSMIC SHOWERS Dust Ejection interplanetary medium JUPITER PLANET MASS TRANSFER Meteoroid showers METEOROIDS Particle size distribution Physical, chemical, mathematical & earth Sciences Physique, chimie, mathématiques & sciences de la terre Sciences of the Universe Space science, astronomy & astrophysics STELLAR WINDS Surface chemistry SURFACES |
| title | DUST FROM COMET 209P/LINEAR DURING ITS 2014 RETURN: PARENT BODY OF A NEW METEOR SHOWER, THE MAY CAMELOPARDALIDS |
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