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Methanol and its Relation to the Water Snowline in the Disk around the Young Outbursting Star V883 Ori
We report the detection of methanol in the disk around the young outbursting star V883 Ori with the Atacama Large Millimeter/submillimeter Array. Four transitions are observed with upper-level energies ranging between 115 and 459 K. The emission is spatially resolved with the 0 14 beam and follows t...
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Published in: | Astrophysical journal. Letters 2018-09, Vol.864 (1), p.L23 |
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container_title | Astrophysical journal. Letters |
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creator | van 't Hoff, Merel L. R. Tobin, John J. Trapman, Leon Harsono, Daniel Sheehan, Patrick D. Fischer, William J. Megeath, S. Thomas van Dishoeck, Ewine F. |
description | We report the detection of methanol in the disk around the young outbursting star V883 Ori with the Atacama Large Millimeter/submillimeter Array. Four transitions are observed with upper-level energies ranging between 115 and 459 K. The emission is spatially resolved with the 0 14 beam and follows the Keplerian rotation previously observed for C18O. Using a rotational diagram analysis, we find a disk-averaged column density of ∼1017 cm−2 and a rotational temperature of ∼90-100 K, suggesting that the methanol has thermally desorbed from the dust grains. We derive outer radii between 120 and 140 au for the different transitions, compared to the 360 au outer radius for C18O. Depending on the exact physical structure of the disk, the methanol emission could originate in the surface layers beyond the water snowline. Alternatively, the bulk of the methanol emission originates inside the water snowline, which can then be as far out as ∼100 au, instead of 42 au as was previously inferred from the continuum opacity. In addition, these results show that outbursting young stars like V883 Ori are good sources to study the ice composition of planet-forming material through thermally desorbed complex molecules, which have proven to be hard to observe in more evolved protoplanetary disks. |
doi_str_mv | 10.3847/2041-8213/aadb8a |
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R. ; Tobin, John J. ; Trapman, Leon ; Harsono, Daniel ; Sheehan, Patrick D. ; Fischer, William J. ; Megeath, S. Thomas ; van Dishoeck, Ewine F.</creator><creatorcontrib>van 't Hoff, Merel L. R. ; Tobin, John J. ; Trapman, Leon ; Harsono, Daniel ; Sheehan, Patrick D. ; Fischer, William J. ; Megeath, S. Thomas ; van Dishoeck, Ewine F.</creatorcontrib><description>We report the detection of methanol in the disk around the young outbursting star V883 Ori with the Atacama Large Millimeter/submillimeter Array. Four transitions are observed with upper-level energies ranging between 115 and 459 K. The emission is spatially resolved with the 0 14 beam and follows the Keplerian rotation previously observed for C18O. Using a rotational diagram analysis, we find a disk-averaged column density of ∼1017 cm−2 and a rotational temperature of ∼90-100 K, suggesting that the methanol has thermally desorbed from the dust grains. We derive outer radii between 120 and 140 au for the different transitions, compared to the 360 au outer radius for C18O. Depending on the exact physical structure of the disk, the methanol emission could originate in the surface layers beyond the water snowline. Alternatively, the bulk of the methanol emission originates inside the water snowline, which can then be as far out as ∼100 au, instead of 42 au as was previously inferred from the continuum opacity. In addition, these results show that outbursting young stars like V883 Ori are good sources to study the ice composition of planet-forming material through thermally desorbed complex molecules, which have proven to be hard to observe in more evolved protoplanetary disks.</description><identifier>ISSN: 2041-8205</identifier><identifier>EISSN: 2041-8213</identifier><identifier>DOI: 10.3847/2041-8213/aadb8a</identifier><language>eng</language><publisher>Austin: The American Astronomical Society</publisher><subject>circumstellar matter ; Emission ; Ice composition ; Ice formation ; ISM: molecules ; Methanol ; Opacity ; Planet formation ; Planetary composition ; Protoplanetary disks ; Protoplanets ; Radio telescopes ; Snowline ; stars: individual (V883 Ori) ; stars: pre-main sequence ; Surface boundary layer ; Surface layers</subject><ispartof>Astrophysical journal. Letters, 2018-09, Vol.864 (1), p.L23</ispartof><rights>2018. The American Astronomical Society. 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Using a rotational diagram analysis, we find a disk-averaged column density of ∼1017 cm−2 and a rotational temperature of ∼90-100 K, suggesting that the methanol has thermally desorbed from the dust grains. We derive outer radii between 120 and 140 au for the different transitions, compared to the 360 au outer radius for C18O. Depending on the exact physical structure of the disk, the methanol emission could originate in the surface layers beyond the water snowline. Alternatively, the bulk of the methanol emission originates inside the water snowline, which can then be as far out as ∼100 au, instead of 42 au as was previously inferred from the continuum opacity. In addition, these results show that outbursting young stars like V883 Ori are good sources to study the ice composition of planet-forming material through thermally desorbed complex molecules, which have proven to be hard to observe in more evolved protoplanetary disks.</description><subject>circumstellar matter</subject><subject>Emission</subject><subject>Ice composition</subject><subject>Ice formation</subject><subject>ISM: molecules</subject><subject>Methanol</subject><subject>Opacity</subject><subject>Planet formation</subject><subject>Planetary composition</subject><subject>Protoplanetary disks</subject><subject>Protoplanets</subject><subject>Radio telescopes</subject><subject>Snowline</subject><subject>stars: individual (V883 Ori)</subject><subject>stars: pre-main sequence</subject><subject>Surface boundary layer</subject><subject>Surface layers</subject><issn>2041-8205</issn><issn>2041-8213</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNp1UMtOwzAQtBBIlMKdoyUkToT6ldcRladUVInyECdr0zjUJcTBdoT4exyCygVOOzuamdUOQoeUnPJMpBNGBI0yRvkEoCwy2EKjDbW9wSTeRXvOrQlhJKHZCFW3yq-gMTWGpsTaO3ynavDaNNgb7FcKP4FXFi8a81HrRmHdfLPn2r1isKYLrn5_DugFzztfdNZ5HfDCg8WPWcbx3Op9tFNB7dTBzxyjh8uL--l1NJtf3UzPZtFSiNRHnOQiLwue5pWiNM9pHENJlCoSxRlPOaRxrlj4t6yWSbIs4pwWBRUArOJ5AoSP0dGQ21rz3inn5dp0tgknJeNJnAiWEhFUZFAtrXHOqkq2Vr-B_ZSUyL5N2dcl--rk0GawHA8WbdrfTGjXtcwSIamcMS7bsgrCkz-E_-Z-AWmagvk</recordid><startdate>20180901</startdate><enddate>20180901</enddate><creator>van 't Hoff, Merel L. 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Thomas</creator><creator>van Dishoeck, Ewine F.</creator><general>The American Astronomical Society</general><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-9209-8708</orcidid><orcidid>https://orcid.org/0000-0001-7591-1907</orcidid><orcidid>https://orcid.org/0000-0001-7629-3573</orcidid><orcidid>https://orcid.org/0000-0002-3747-2496</orcidid><orcidid>https://orcid.org/0000-0002-2555-9869</orcidid><orcidid>https://orcid.org/0000-0002-6195-0152</orcidid></search><sort><creationdate>20180901</creationdate><title>Methanol and its Relation to the Water Snowline in the Disk around the Young Outbursting Star V883 Ori</title><author>van 't Hoff, Merel L. R. ; Tobin, John J. ; Trapman, Leon ; Harsono, Daniel ; Sheehan, Patrick D. ; Fischer, William J. ; Megeath, S. 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R.</creatorcontrib><creatorcontrib>Tobin, John J.</creatorcontrib><creatorcontrib>Trapman, Leon</creatorcontrib><creatorcontrib>Harsono, Daniel</creatorcontrib><creatorcontrib>Sheehan, Patrick D.</creatorcontrib><creatorcontrib>Fischer, William J.</creatorcontrib><creatorcontrib>Megeath, S. Thomas</creatorcontrib><creatorcontrib>van Dishoeck, Ewine F.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Astrophysical journal. Letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>van 't Hoff, Merel L. R.</au><au>Tobin, John J.</au><au>Trapman, Leon</au><au>Harsono, Daniel</au><au>Sheehan, Patrick D.</au><au>Fischer, William J.</au><au>Megeath, S. Thomas</au><au>van Dishoeck, Ewine F.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Methanol and its Relation to the Water Snowline in the Disk around the Young Outbursting Star V883 Ori</atitle><jtitle>Astrophysical journal. Letters</jtitle><stitle>APJL</stitle><addtitle>Astrophys. J. Lett</addtitle><date>2018-09-01</date><risdate>2018</risdate><volume>864</volume><issue>1</issue><spage>L23</spage><pages>L23-</pages><issn>2041-8205</issn><eissn>2041-8213</eissn><abstract>We report the detection of methanol in the disk around the young outbursting star V883 Ori with the Atacama Large Millimeter/submillimeter Array. Four transitions are observed with upper-level energies ranging between 115 and 459 K. The emission is spatially resolved with the 0 14 beam and follows the Keplerian rotation previously observed for C18O. Using a rotational diagram analysis, we find a disk-averaged column density of ∼1017 cm−2 and a rotational temperature of ∼90-100 K, suggesting that the methanol has thermally desorbed from the dust grains. We derive outer radii between 120 and 140 au for the different transitions, compared to the 360 au outer radius for C18O. Depending on the exact physical structure of the disk, the methanol emission could originate in the surface layers beyond the water snowline. Alternatively, the bulk of the methanol emission originates inside the water snowline, which can then be as far out as ∼100 au, instead of 42 au as was previously inferred from the continuum opacity. 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subjects | circumstellar matter Emission Ice composition Ice formation ISM: molecules Methanol Opacity Planet formation Planetary composition Protoplanetary disks Protoplanets Radio telescopes Snowline stars: individual (V883 Ori) stars: pre-main sequence Surface boundary layer Surface layers |
title | Methanol and its Relation to the Water Snowline in the Disk around the Young Outbursting Star V883 Ori |
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