Gaia Net: Toward Robust Spectroscopic Parameters of Stars of all Evolutionary Stages
We present a new processing of XP spectra for 220 million stars released in Gaia DR3. The new data model is capable of handling objects with T _eff between 2000 and 50,000 K and with $\mathrm{log}\,g$ between 0 and 10, including objects of multitude of masses and evolutionary stages. This includes f...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/adc2fa |
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| author | Dylan Huson Indiana Cowan Logan Sizemore Marina Kounkel Brian Hutchinson |
| author_facet | Dylan Huson Indiana Cowan Logan Sizemore Marina Kounkel Brian Hutchinson |
| author_sort | Dylan Huson |
| collection | DOAJ |
| description | We present a new processing of XP spectra for 220 million stars released in Gaia DR3. The new data model is capable of handling objects with T _eff between 2000 and 50,000 K and with $\mathrm{log}\,g$ between 0 and 10, including objects of multitude of masses and evolutionary stages. This includes for the first time ever robust processing of spectroscopic parameters for pre-main-sequence stars, with $\mathrm{log}\,g$ sensitivity toward their age. Through this analysis we examine the distribution of young low-mass stars with ages of up to 20 Myr in the solar neighborhood, and we identify a new massive (>1000 stars) population, Ophion, which is found east of Sco–Cen. This population appears to be fully disrupted, with negligible kinematic coherence. Nonetheless, due its young age it appears to still persist as a spatial overdensity. Through improved determination of ages of the nearby stars, it may be possible to better recover the star-forming history of the solar neighborhood outside of the moving groups. |
| format | Article |
| id | doaj-art-fddcd4613c81406ba1883c4eac4aba00 |
| institution | OA Journals |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-fddcd4613c81406ba1883c4eac4aba002025-08-20T02:30:10ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-0198415810.3847/1538-4357/adc2faGaia Net: Toward Robust Spectroscopic Parameters of Stars of all Evolutionary StagesDylan Huson0Indiana Cowan1Logan Sizemore2Marina Kounkel3https://orcid.org/0000-0002-5365-1267Brian Hutchinson4https://orcid.org/0000-0002-5537-008XComputer Science Department, Western Washington University , 516 High Street, Bellingham, WA 98225, USA ; Brian.Hutchinson@wwu.eduComputer Science Department, Western Washington University , 516 High Street, Bellingham, WA 98225, USA ; Brian.Hutchinson@wwu.eduComputer Science Department, Western Washington University , 516 High Street, Bellingham, WA 98225, USA ; Brian.Hutchinson@wwu.eduDepartment of Physics and Astronomy, University of North Florida , 1 UNF Drive, Jacksonville, FL 32224, USA ; marina.kounkel@unf.eduComputer Science Department, Western Washington University , 516 High Street, Bellingham, WA 98225, USA ; Brian.Hutchinson@wwu.edu; Human-Earth Systems & Science Group, Pacific Northwest National Laboratory , 5825 University Research Court, Suite 3500, College Park, MD 20740, USAWe present a new processing of XP spectra for 220 million stars released in Gaia DR3. The new data model is capable of handling objects with T _eff between 2000 and 50,000 K and with $\mathrm{log}\,g$ between 0 and 10, including objects of multitude of masses and evolutionary stages. This includes for the first time ever robust processing of spectroscopic parameters for pre-main-sequence stars, with $\mathrm{log}\,g$ sensitivity toward their age. Through this analysis we examine the distribution of young low-mass stars with ages of up to 20 Myr in the solar neighborhood, and we identify a new massive (>1000 stars) population, Ophion, which is found east of Sco–Cen. This population appears to be fully disrupted, with negligible kinematic coherence. Nonetheless, due its young age it appears to still persist as a spatial overdensity. Through improved determination of ages of the nearby stars, it may be possible to better recover the star-forming history of the solar neighborhood outside of the moving groups.https://doi.org/10.3847/1538-4357/adc2faSpectroscopyStellar propertiesSurface gravityStellar populations |
| spellingShingle | Dylan Huson Indiana Cowan Logan Sizemore Marina Kounkel Brian Hutchinson Gaia Net: Toward Robust Spectroscopic Parameters of Stars of all Evolutionary Stages The Astrophysical Journal Spectroscopy Stellar properties Surface gravity Stellar populations |
| title | Gaia Net: Toward Robust Spectroscopic Parameters of Stars of all Evolutionary Stages |
| title_full | Gaia Net: Toward Robust Spectroscopic Parameters of Stars of all Evolutionary Stages |
| title_fullStr | Gaia Net: Toward Robust Spectroscopic Parameters of Stars of all Evolutionary Stages |
| title_full_unstemmed | Gaia Net: Toward Robust Spectroscopic Parameters of Stars of all Evolutionary Stages |
| title_short | Gaia Net: Toward Robust Spectroscopic Parameters of Stars of all Evolutionary Stages |
| title_sort | gaia net toward robust spectroscopic parameters of stars of all evolutionary stages |
| topic | Spectroscopy Stellar properties Surface gravity Stellar populations |
| url | https://doi.org/10.3847/1538-4357/adc2fa |
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