An Intermediate Luminosity Transient in NGC 300: The Eruption of a Dust-Enshrouded Massive Star
We present multi-epoch high-resolution optical spectroscopy, UV/radio/X-ray imaging, and archival Hubble and Spitzer observations of an intermediate luminosity optical transient recently discovered in the nearby galaxy NGC 300. We find that the transient (NGC 300 OT2008-1) has a peak absolute magnit...
Gespeichert in:
Veröffentlicht in: | The Astrophysical journal 2009-07, Vol.699 (2), p.1850-1865 |
---|---|
Hauptverfasser: | , , , , , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext bestellen |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
container_end_page | 1865 |
---|---|
container_issue | 2 |
container_start_page | 1850 |
container_title | The Astrophysical journal |
container_volume | 699 |
creator | Berger, E Soderberg, A. M Chevalier, R. A Fransson, C Foley, R. J Leonard, D. C Debes, J. H Diamond-Stanic, A. M Dupree, A. K Ivans, I. I Simmerer, J Thompson, I. B Tremonti, C. A |
description | We present multi-epoch high-resolution optical spectroscopy, UV/radio/X-ray imaging, and archival Hubble and Spitzer observations of an intermediate luminosity optical transient recently discovered in the nearby galaxy NGC 300. We find that the transient (NGC 300 OT2008-1) has a peak absolute magnitude of M bol ≈ -11.8 mag, intermediate between novae and supernovae, and similar to the recent events M85 OT2006-1 and SN 2008S. Our high-resolution spectra, the first for this event, are dominated by intermediate velocity (~200-1000 km s-1) hydrogen Balmer lines and Ca II emission and absorption lines that point to a complex circumstellar environment, reminiscent of the yellow hypergiant IRC+10420. In particular, we detect asymmetric Ca II H&K absorption with a broad red wing extending to ~103 km s-1, indicative of gas inflow at high velocity (possibly the wind of a massive binary companion). The low luminosity, intermediate velocities, and overall similarity to a known eruptive star indicate that the event did not result in a complete disruption of the progenitor. We identify the progenitor in archival Spitzer observations, with deep upper limits from Hubble data. The spectral energy distribution points to a dust-enshrouded star with a luminosity of about 6 × 104 L sun, indicative of a ~10-20 M sun progenitor (or binary system). This conclusion is in good agreement with our interpretation of the outburst and circumstellar properties. The lack of significant extinction in the transient spectrum indicates that the dust surrounding the progenitor was cleared by the outburst. We thus predict that the progenitor should be eventually visible with Hubble if the transient event marks an evolutionary transition to a dust-free state, or with Spitzer if the event marks a cyclical process of dust formation. |
doi_str_mv | 10.1088/0004-637X/699/2/1850 |
format | Article |
fullrecord | <record><control><sourceid>swepub_O3W</sourceid><recordid>TN_cdi_pascalfrancis_primary_21789906</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>oai_lup_lub_lu_se_f33a6e34_fbef_47bc_aad7_8a3b7f98f8b4</sourcerecordid><originalsourceid>FETCH-LOGICAL-c504t-8d1bb2abf567884ca527b700f932fc0b5b3025dd4bc9b794e9fc7debd9548c3b3</originalsourceid><addsrcrecordid>eNqNkc1u1DAUhS0EEkPhDVh4w6oKcWI7ttmNpkOpNMCCAbG7-JcazSSRnYD6Nn2WPhmOBroBJBZXV1f6ztHVOQg9b8jLhkhZE0JY1VHxue6Uqtu6kZw8QKuGU1kxysVDtLpHHqMnOX9bzlapFfqy7vFVP_l09C7qyePdfIz9kON0g_dJ9zn6fsKxx-8uN3e3lJBXeH_t8TbN4xSHHg8Ba3wx56na9vk6DbPzDr_VOcfvHn-YdHqKHgV9yP7Zr32GPr7e7jdvqt37y6vNeldZTthUSdcY02oTeCekZFbzVhhBSFC0DZYYbihpuXPMWGWEYl4FK5w3TnEmLTX0DO1OvvmHH2cDY4pHnW5g0BEO81jGlIHsIVCqO08ZBOMDMGEsaO0ESE2NCEoGaVixO_-n3UX8tIYhfYU8A-3KX4VmJ9qmIedUbH_zDYGlIlgChyV_KBVBC0tFRfbiJBt1tvoQSt425ntt2wipFOkKV5-4OIz_63z-p-JvJIwu0J_LUq7U</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>An Intermediate Luminosity Transient in NGC 300: The Eruption of a Dust-Enshrouded Massive Star</title><source>IOP Publishing Free Content</source><creator>Berger, E ; Soderberg, A. M ; Chevalier, R. A ; Fransson, C ; Foley, R. J ; Leonard, D. C ; Debes, J. H ; Diamond-Stanic, A. M ; Dupree, A. K ; Ivans, I. I ; Simmerer, J ; Thompson, I. B ; Tremonti, C. A</creator><creatorcontrib>Berger, E ; Soderberg, A. M ; Chevalier, R. A ; Fransson, C ; Foley, R. J ; Leonard, D. C ; Debes, J. H ; Diamond-Stanic, A. M ; Dupree, A. K ; Ivans, I. I ; Simmerer, J ; Thompson, I. B ; Tremonti, C. A</creatorcontrib><description>We present multi-epoch high-resolution optical spectroscopy, UV/radio/X-ray imaging, and archival Hubble and Spitzer observations of an intermediate luminosity optical transient recently discovered in the nearby galaxy NGC 300. We find that the transient (NGC 300 OT2008-1) has a peak absolute magnitude of M bol ≈ -11.8 mag, intermediate between novae and supernovae, and similar to the recent events M85 OT2006-1 and SN 2008S. Our high-resolution spectra, the first for this event, are dominated by intermediate velocity (~200-1000 km s-1) hydrogen Balmer lines and Ca II emission and absorption lines that point to a complex circumstellar environment, reminiscent of the yellow hypergiant IRC+10420. In particular, we detect asymmetric Ca II H&amp;K absorption with a broad red wing extending to ~103 km s-1, indicative of gas inflow at high velocity (possibly the wind of a massive binary companion). The low luminosity, intermediate velocities, and overall similarity to a known eruptive star indicate that the event did not result in a complete disruption of the progenitor. We identify the progenitor in archival Spitzer observations, with deep upper limits from Hubble data. The spectral energy distribution points to a dust-enshrouded star with a luminosity of about 6 × 104 L sun, indicative of a ~10-20 M sun progenitor (or binary system). This conclusion is in good agreement with our interpretation of the outburst and circumstellar properties. The lack of significant extinction in the transient spectrum indicates that the dust surrounding the progenitor was cleared by the outburst. We thus predict that the progenitor should be eventually visible with Hubble if the transient event marks an evolutionary transition to a dust-free state, or with Spitzer if the event marks a cyclical process of dust formation.</description><identifier>ISSN: 0004-637X</identifier><identifier>ISSN: 1538-4357</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.1088/0004-637X/699/2/1850</identifier><identifier>CODEN: ASJOAB</identifier><language>eng</language><publisher>Bristol: IOP Publishing</publisher><subject>Astronomi, astrofysik och kosmologi ; Astronomy ; Astronomy, Astrophysics and Cosmology ; circumstellar matter ; Earth, ocean, space ; Exact sciences and technology ; Fysik ; Natural Sciences ; Naturvetenskap ; outflows ; Physical Sciences ; stars: evolution ; stars: evolution circumstellar matter stars: mass loss stars: winds ; stars: mass loss ; stars: winds</subject><ispartof>The Astrophysical journal, 2009-07, Vol.699 (2), p.1850-1865</ispartof><rights>2009 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c504t-8d1bb2abf567884ca527b700f932fc0b5b3025dd4bc9b794e9fc7debd9548c3b3</citedby><cites>FETCH-LOGICAL-c504t-8d1bb2abf567884ca527b700f932fc0b5b3025dd4bc9b794e9fc7debd9548c3b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.1088/0004-637X/699/2/1850/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>230,314,550,776,780,881,27605,27901,27902,53906</link.rule.ids><linktorsrc>$$Uhttp://iopscience.iop.org/0004-637X/699/2/1850$$EView_record_in_IOP_Publishing$$FView_record_in_$$GIOP_Publishing</linktorsrc><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=21789906$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-36302$$DView record from Swedish Publication Index$$Hfree_for_read</backlink><backlink>$$Uhttps://lup.lub.lu.se/record/1453794$$DView record from Swedish Publication Index$$Hfree_for_read</backlink></links><search><creatorcontrib>Berger, E</creatorcontrib><creatorcontrib>Soderberg, A. M</creatorcontrib><creatorcontrib>Chevalier, R. A</creatorcontrib><creatorcontrib>Fransson, C</creatorcontrib><creatorcontrib>Foley, R. J</creatorcontrib><creatorcontrib>Leonard, D. C</creatorcontrib><creatorcontrib>Debes, J. H</creatorcontrib><creatorcontrib>Diamond-Stanic, A. M</creatorcontrib><creatorcontrib>Dupree, A. K</creatorcontrib><creatorcontrib>Ivans, I. I</creatorcontrib><creatorcontrib>Simmerer, J</creatorcontrib><creatorcontrib>Thompson, I. B</creatorcontrib><creatorcontrib>Tremonti, C. A</creatorcontrib><title>An Intermediate Luminosity Transient in NGC 300: The Eruption of a Dust-Enshrouded Massive Star</title><title>The Astrophysical journal</title><description>We present multi-epoch high-resolution optical spectroscopy, UV/radio/X-ray imaging, and archival Hubble and Spitzer observations of an intermediate luminosity optical transient recently discovered in the nearby galaxy NGC 300. We find that the transient (NGC 300 OT2008-1) has a peak absolute magnitude of M bol ≈ -11.8 mag, intermediate between novae and supernovae, and similar to the recent events M85 OT2006-1 and SN 2008S. Our high-resolution spectra, the first for this event, are dominated by intermediate velocity (~200-1000 km s-1) hydrogen Balmer lines and Ca II emission and absorption lines that point to a complex circumstellar environment, reminiscent of the yellow hypergiant IRC+10420. In particular, we detect asymmetric Ca II H&amp;K absorption with a broad red wing extending to ~103 km s-1, indicative of gas inflow at high velocity (possibly the wind of a massive binary companion). The low luminosity, intermediate velocities, and overall similarity to a known eruptive star indicate that the event did not result in a complete disruption of the progenitor. We identify the progenitor in archival Spitzer observations, with deep upper limits from Hubble data. The spectral energy distribution points to a dust-enshrouded star with a luminosity of about 6 × 104 L sun, indicative of a ~10-20 M sun progenitor (or binary system). This conclusion is in good agreement with our interpretation of the outburst and circumstellar properties. The lack of significant extinction in the transient spectrum indicates that the dust surrounding the progenitor was cleared by the outburst. We thus predict that the progenitor should be eventually visible with Hubble if the transient event marks an evolutionary transition to a dust-free state, or with Spitzer if the event marks a cyclical process of dust formation.</description><subject>Astronomi, astrofysik och kosmologi</subject><subject>Astronomy</subject><subject>Astronomy, Astrophysics and Cosmology</subject><subject>circumstellar matter</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Fysik</subject><subject>Natural Sciences</subject><subject>Naturvetenskap</subject><subject>outflows</subject><subject>Physical Sciences</subject><subject>stars: evolution</subject><subject>stars: evolution circumstellar matter stars: mass loss stars: winds</subject><subject>stars: mass loss</subject><subject>stars: winds</subject><issn>0004-637X</issn><issn>1538-4357</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><sourceid>D8T</sourceid><recordid>eNqNkc1u1DAUhS0EEkPhDVh4w6oKcWI7ttmNpkOpNMCCAbG7-JcazSSRnYD6Nn2WPhmOBroBJBZXV1f6ztHVOQg9b8jLhkhZE0JY1VHxue6Uqtu6kZw8QKuGU1kxysVDtLpHHqMnOX9bzlapFfqy7vFVP_l09C7qyePdfIz9kON0g_dJ9zn6fsKxx-8uN3e3lJBXeH_t8TbN4xSHHg8Ba3wx56na9vk6DbPzDr_VOcfvHn-YdHqKHgV9yP7Zr32GPr7e7jdvqt37y6vNeldZTthUSdcY02oTeCekZFbzVhhBSFC0DZYYbihpuXPMWGWEYl4FK5w3TnEmLTX0DO1OvvmHH2cDY4pHnW5g0BEO81jGlIHsIVCqO08ZBOMDMGEsaO0ESE2NCEoGaVixO_-n3UX8tIYhfYU8A-3KX4VmJ9qmIedUbH_zDYGlIlgChyV_KBVBC0tFRfbiJBt1tvoQSt425ntt2wipFOkKV5-4OIz_63z-p-JvJIwu0J_LUq7U</recordid><startdate>20090710</startdate><enddate>20090710</enddate><creator>Berger, E</creator><creator>Soderberg, A. M</creator><creator>Chevalier, R. A</creator><creator>Fransson, C</creator><creator>Foley, R. J</creator><creator>Leonard, D. C</creator><creator>Debes, J. H</creator><creator>Diamond-Stanic, A. M</creator><creator>Dupree, A. K</creator><creator>Ivans, I. I</creator><creator>Simmerer, J</creator><creator>Thompson, I. B</creator><creator>Tremonti, C. A</creator><general>IOP Publishing</general><general>IOP</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>ADTPV</scope><scope>AOWAS</scope><scope>DG7</scope><scope>AGCHP</scope><scope>D8T</scope><scope>D95</scope><scope>ZZAVC</scope></search><sort><creationdate>20090710</creationdate><title>An Intermediate Luminosity Transient in NGC 300: The Eruption of a Dust-Enshrouded Massive Star</title><author>Berger, E ; Soderberg, A. M ; Chevalier, R. A ; Fransson, C ; Foley, R. J ; Leonard, D. C ; Debes, J. H ; Diamond-Stanic, A. M ; Dupree, A. K ; Ivans, I. I ; Simmerer, J ; Thompson, I. B ; Tremonti, C. A</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c504t-8d1bb2abf567884ca527b700f932fc0b5b3025dd4bc9b794e9fc7debd9548c3b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Astronomi, astrofysik och kosmologi</topic><topic>Astronomy</topic><topic>Astronomy, Astrophysics and Cosmology</topic><topic>circumstellar matter</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>Fysik</topic><topic>Natural Sciences</topic><topic>Naturvetenskap</topic><topic>outflows</topic><topic>Physical Sciences</topic><topic>stars: evolution</topic><topic>stars: evolution circumstellar matter stars: mass loss stars: winds</topic><topic>stars: mass loss</topic><topic>stars: winds</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Berger, E</creatorcontrib><creatorcontrib>Soderberg, A. M</creatorcontrib><creatorcontrib>Chevalier, R. A</creatorcontrib><creatorcontrib>Fransson, C</creatorcontrib><creatorcontrib>Foley, R. J</creatorcontrib><creatorcontrib>Leonard, D. C</creatorcontrib><creatorcontrib>Debes, J. H</creatorcontrib><creatorcontrib>Diamond-Stanic, A. M</creatorcontrib><creatorcontrib>Dupree, A. K</creatorcontrib><creatorcontrib>Ivans, I. I</creatorcontrib><creatorcontrib>Simmerer, J</creatorcontrib><creatorcontrib>Thompson, I. B</creatorcontrib><creatorcontrib>Tremonti, C. A</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>SwePub</collection><collection>SwePub Articles</collection><collection>SWEPUB Stockholms universitet</collection><collection>SWEPUB Lunds universitet full text</collection><collection>SWEPUB Freely available online</collection><collection>SWEPUB Lunds universitet</collection><collection>SwePub Articles full text</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Berger, E</au><au>Soderberg, A. M</au><au>Chevalier, R. A</au><au>Fransson, C</au><au>Foley, R. J</au><au>Leonard, D. C</au><au>Debes, J. H</au><au>Diamond-Stanic, A. M</au><au>Dupree, A. K</au><au>Ivans, I. I</au><au>Simmerer, J</au><au>Thompson, I. B</au><au>Tremonti, C. A</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>An Intermediate Luminosity Transient in NGC 300: The Eruption of a Dust-Enshrouded Massive Star</atitle><jtitle>The Astrophysical journal</jtitle><date>2009-07-10</date><risdate>2009</risdate><volume>699</volume><issue>2</issue><spage>1850</spage><epage>1865</epage><pages>1850-1865</pages><issn>0004-637X</issn><issn>1538-4357</issn><eissn>1538-4357</eissn><coden>ASJOAB</coden><abstract>We present multi-epoch high-resolution optical spectroscopy, UV/radio/X-ray imaging, and archival Hubble and Spitzer observations of an intermediate luminosity optical transient recently discovered in the nearby galaxy NGC 300. We find that the transient (NGC 300 OT2008-1) has a peak absolute magnitude of M bol ≈ -11.8 mag, intermediate between novae and supernovae, and similar to the recent events M85 OT2006-1 and SN 2008S. Our high-resolution spectra, the first for this event, are dominated by intermediate velocity (~200-1000 km s-1) hydrogen Balmer lines and Ca II emission and absorption lines that point to a complex circumstellar environment, reminiscent of the yellow hypergiant IRC+10420. In particular, we detect asymmetric Ca II H&amp;K absorption with a broad red wing extending to ~103 km s-1, indicative of gas inflow at high velocity (possibly the wind of a massive binary companion). The low luminosity, intermediate velocities, and overall similarity to a known eruptive star indicate that the event did not result in a complete disruption of the progenitor. We identify the progenitor in archival Spitzer observations, with deep upper limits from Hubble data. The spectral energy distribution points to a dust-enshrouded star with a luminosity of about 6 × 104 L sun, indicative of a ~10-20 M sun progenitor (or binary system). This conclusion is in good agreement with our interpretation of the outburst and circumstellar properties. The lack of significant extinction in the transient spectrum indicates that the dust surrounding the progenitor was cleared by the outburst. We thus predict that the progenitor should be eventually visible with Hubble if the transient event marks an evolutionary transition to a dust-free state, or with Spitzer if the event marks a cyclical process of dust formation.</abstract><cop>Bristol</cop><pub>IOP Publishing</pub><doi>10.1088/0004-637X/699/2/1850</doi><tpages>16</tpages><oa>free_for_read</oa></addata></record> |
fulltext | fulltext_linktorsrc |
identifier | ISSN: 0004-637X |
ispartof | The Astrophysical journal, 2009-07, Vol.699 (2), p.1850-1865 |
issn | 0004-637X 1538-4357 1538-4357 |
language | eng |
recordid | cdi_pascalfrancis_primary_21789906 |
source | IOP Publishing Free Content |
subjects | Astronomi, astrofysik och kosmologi Astronomy Astronomy, Astrophysics and Cosmology circumstellar matter Earth, ocean, space Exact sciences and technology Fysik Natural Sciences Naturvetenskap outflows Physical Sciences stars: evolution stars: evolution circumstellar matter stars: mass loss stars: winds stars: mass loss stars: winds |
title | An Intermediate Luminosity Transient in NGC 300: The Eruption of a Dust-Enshrouded Massive Star |
url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-18T09%3A22%3A29IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-swepub_O3W&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=An%20Intermediate%20Luminosity%20Transient%20in%20NGC%C2%A0300:%20The%20Eruption%20of%20a%20Dust-Enshrouded%20Massive%20Star&rft.jtitle=The%20Astrophysical%20journal&rft.au=Berger,%20E&rft.date=2009-07-10&rft.volume=699&rft.issue=2&rft.spage=1850&rft.epage=1865&rft.pages=1850-1865&rft.issn=0004-637X&rft.eissn=1538-4357&rft.coden=ASJOAB&rft_id=info:doi/10.1088/0004-637X/699/2/1850&rft_dat=%3Cswepub_O3W%3Eoai_lup_lub_lu_se_f33a6e34_fbef_47bc_aad7_8a3b7f98f8b4%3C/swepub_O3W%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 |