GHOST Commissioning Science Results: Identifying a new chemically peculiar star in Reticulum II
The Gemini High-resolution Optical SpecTrograph (GHOST) is the newest high resolution spectrograph to be developed for a large aperture telescope, recently deployed and commissioned at the Gemini-South telescope. In this paper, we present the first science results from the GHOST spectrograph taking...
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| creator | Hayes, Christian R Venn, Kim A Waller, Fletcher Jensen, Jaclyn McConnachie, Alan W Pazder, John Sestito, Federico Andre, Anthony Baker, Gabriella Bassett, John Bento, Joao Burley, Gregory Brzeski, Jurek Case, Scott Chapin, Edward Chin, Timothy Chisholm, Eric Churilov, Vladimir Densmore, Adam Diaz, Ruben Dunn, Jennifer Edgar, Michael Farrell, Tony Firpo, Veronica Fitzsimmons, Joeleff Font-Serra, Juan Fuentes, Javier Ganton, Colin Gomez-Jimenez, Manuel Hardy, Tim Henderson, David Hill, Alexis Hoff, Brian Ireland, Michael Kalari, Venu Kelly, Neal Klauser, Urs Kondrat, Yuriy Labrie, Kathleen Lambert, Sam Luvaul, Lance Lawrence, Jon Lothrop, Jordan Macdonald, G Scott Mali, Slavko Margheim, Steve McDermid, Richard McGregor, Helen Miller, Bryan Miranda, Felipe Muller, Rolf Nielsen, Jon Norbury, Ryan Oberdorf, Oliver Pai, Naveen Perez, Gabriel Prado, Pablo Price, Ian Quiroz, Carlos Reshetov, Vladimir Robertson, Gordon Ruiz-Carmona, Roque Salinas, Ricardo Sebo, Kim M Sheinis, Andrew Shetrone, Matthew Shortridge, Keith Silversides, Katherine Silva, Karleyne Simpson, Chris Smith, Greg Szeto, Kei Tims, Julia Toro, Eduardo Urrutia, Cristian Venkatesan, Sudharshan Waller, Lewis Wevers, Ivan Wierzbicki, Ramunas White, Marc Young, Peter Ross Zhelem |
| description | The Gemini High-resolution Optical SpecTrograph (GHOST) is the newest high resolution spectrograph to be developed for a large aperture telescope, recently deployed and commissioned at the Gemini-South telescope. In this paper, we present the first science results from the GHOST spectrograph taking during its commissioning runs. We have observed the bright metal-poor benchmark star HD 122563, along with two stars in the ultra faint dwarf galaxy, Ret II, one of which was previously identified as a candidate member, but did not have a previous detailed chemical abundance analysis. This star (GDR3 0928) is found to be a bona fide member of Ret II, and from a spectral synthesis analysis, it is also revealed to be a CEMP-r star, with significant enhancements in the several light elements (C, N, O, Na, Mg, and Si), in addition to featuring an r-process enhancement like many other Ret II stars. The light-element enhancements in this star resemble the abundance patterns seen in the CEMP-no stars of other ultra faint dwarf galaxies, and are thought to have been produced by an independent source from the r-process. These unusual abundance patterns are thought to be produced by faint supernovae, which may be produced by some of the earliest generations of stars. |
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In this paper, we present the first science results from the GHOST spectrograph taking during its commissioning runs. We have observed the bright metal-poor benchmark star HD 122563, along with two stars in the ultra faint dwarf galaxy, Ret II, one of which was previously identified as a candidate member, but did not have a previous detailed chemical abundance analysis. This star (GDR3 0928) is found to be a bona fide member of Ret II, and from a spectral synthesis analysis, it is also revealed to be a CEMP-r star, with significant enhancements in the several light elements (C, N, O, Na, Mg, and Si), in addition to featuring an r-process enhancement like many other Ret II stars. The light-element enhancements in this star resemble the abundance patterns seen in the CEMP-no stars of other ultra faint dwarf galaxies, and are thought to have been produced by an independent source from the r-process. 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Font-Serra, Juan ; Fuentes, Javier ; Ganton, Colin ; Gomez-Jimenez, Manuel ; Hardy, Tim ; Henderson, David ; Hill, Alexis ; Hoff, Brian ; Ireland, Michael ; Kalari, Venu ; Kelly, Neal ; Klauser, Urs ; Kondrat, Yuriy ; Labrie, Kathleen ; Lambert, Sam ; Luvaul, Lance ; Lawrence, Jon ; Lothrop, Jordan ; Macdonald, G Scott ; Mali, Slavko ; Margheim, Steve ; McDermid, Richard ; McGregor, Helen ; Miller, Bryan ; Miranda, Felipe ; Muller, Rolf ; Nielsen, Jon ; Norbury, Ryan ; Oberdorf, Oliver ; Pai, Naveen ; Perez, Gabriel ; Prado, Pablo ; Price, Ian ; Quiroz, Carlos ; Reshetov, Vladimir ; Robertson, Gordon ; Ruiz-Carmona, Roque ; Salinas, Ricardo ; Sebo, Kim M ; Sheinis, Andrew ; Shetrone, Matthew ; Shortridge, Keith ; Silversides, Katherine ; Silva, Karleyne ; Simpson, Chris ; Smith, Greg ; Szeto, Kei ; Tims, Julia ; Toro, Eduardo ; Urrutia, Cristian ; Venkatesan, Sudharshan ; Waller, Lewis ; Wevers, Ivan ; Wierzbicki, Ramunas ; White, Marc ; Young, Peter ; Ross 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Eduardo</creatorcontrib><creatorcontrib>Urrutia, Cristian</creatorcontrib><creatorcontrib>Venkatesan, Sudharshan</creatorcontrib><creatorcontrib>Waller, Lewis</creatorcontrib><creatorcontrib>Wevers, Ivan</creatorcontrib><creatorcontrib>Wierzbicki, Ramunas</creatorcontrib><creatorcontrib>White, Marc</creatorcontrib><creatorcontrib>Young, Peter</creatorcontrib><creatorcontrib>Ross Zhelem</creatorcontrib><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hayes, Christian R</au><au>Venn, Kim A</au><au>Waller, Fletcher</au><au>Jensen, Jaclyn</au><au>McConnachie, Alan W</au><au>Pazder, John</au><au>Sestito, Federico</au><au>Andre, Anthony</au><au>Baker, Gabriella</au><au>Bassett, John</au><au>Bento, Joao</au><au>Burley, Gregory</au><au>Brzeski, Jurek</au><au>Case, Scott</au><au>Chapin, Edward</au><au>Chin, Timothy</au><au>Chisholm, Eric</au><au>Churilov, Vladimir</au><au>Densmore, Adam</au><au>Diaz, Ruben</au><au>Dunn, Jennifer</au><au>Edgar, Michael</au><au>Farrell, Tony</au><au>Firpo, Veronica</au><au>Fitzsimmons, Joeleff</au><au>Font-Serra, Juan</au><au>Fuentes, Javier</au><au>Ganton, Colin</au><au>Gomez-Jimenez, Manuel</au><au>Hardy, Tim</au><au>Henderson, David</au><au>Hill, Alexis</au><au>Hoff, Brian</au><au>Ireland, Michael</au><au>Kalari, Venu</au><au>Kelly, Neal</au><au>Klauser, Urs</au><au>Kondrat, Yuriy</au><au>Labrie, Kathleen</au><au>Lambert, Sam</au><au>Luvaul, Lance</au><au>Lawrence, Jon</au><au>Lothrop, Jordan</au><au>Macdonald, G Scott</au><au>Mali, Slavko</au><au>Margheim, Steve</au><au>McDermid, Richard</au><au>McGregor, Helen</au><au>Miller, Bryan</au><au>Miranda, Felipe</au><au>Muller, Rolf</au><au>Nielsen, Jon</au><au>Norbury, Ryan</au><au>Oberdorf, Oliver</au><au>Pai, Naveen</au><au>Perez, Gabriel</au><au>Prado, Pablo</au><au>Price, Ian</au><au>Quiroz, Carlos</au><au>Reshetov, Vladimir</au><au>Robertson, Gordon</au><au>Ruiz-Carmona, Roque</au><au>Salinas, Ricardo</au><au>Sebo, Kim M</au><au>Sheinis, Andrew</au><au>Shetrone, Matthew</au><au>Shortridge, Keith</au><au>Silversides, Katherine</au><au>Silva, Karleyne</au><au>Simpson, Chris</au><au>Smith, Greg</au><au>Szeto, Kei</au><au>Tims, Julia</au><au>Toro, Eduardo</au><au>Urrutia, Cristian</au><au>Venkatesan, Sudharshan</au><au>Waller, Lewis</au><au>Wevers, Ivan</au><au>Wierzbicki, Ramunas</au><au>White, Marc</au><au>Young, Peter</au><au>Ross Zhelem</au><format>book</format><genre>document</genre><ristype>GEN</ristype><atitle>GHOST Commissioning Science Results: Identifying a new chemically peculiar star in Reticulum II</atitle><jtitle>arXiv.org</jtitle><date>2023-06-07</date><risdate>2023</risdate><eissn>2331-8422</eissn><abstract>The Gemini High-resolution Optical SpecTrograph (GHOST) is the newest high resolution spectrograph to be developed for a large aperture telescope, recently deployed and commissioned at the Gemini-South telescope. In this paper, we present the first science results from the GHOST spectrograph taking during its commissioning runs. We have observed the bright metal-poor benchmark star HD 122563, along with two stars in the ultra faint dwarf galaxy, Ret II, one of which was previously identified as a candidate member, but did not have a previous detailed chemical abundance analysis. This star (GDR3 0928) is found to be a bona fide member of Ret II, and from a spectral synthesis analysis, it is also revealed to be a CEMP-r star, with significant enhancements in the several light elements (C, N, O, Na, Mg, and Si), in addition to featuring an r-process enhancement like many other Ret II stars. The light-element enhancements in this star resemble the abundance patterns seen in the CEMP-no stars of other ultra faint dwarf galaxies, and are thought to have been produced by an independent source from the r-process. These unusual abundance patterns are thought to be produced by faint supernovae, which may be produced by some of the earliest generations of stars.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | EISSN: 2331-8422 |
| ispartof | arXiv.org, 2023-06 |
| issn | 2331-8422 |
| language | eng |
| recordid | cdi_proquest_journals_2824144772 |
| source | Free E- Journals |
| subjects | Abundance Commissioning Dwarf galaxies High resolution Light elements Metallicity Peculiar stars Supernovae |
| title | GHOST Commissioning Science Results: Identifying a new chemically peculiar star in Reticulum II |
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