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Discovery of Metal-poor and Distant Pre-Main Sequence Candidates in WLM with JWST
| Indexado |
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| DOI | 10.3847/2041-8213/ADAFA5 | ||||
| Año | 2025 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
Abstract
We present the discovery of 12 metal-poor and distant pre-main sequence (PMS) candidates in the dwarf irregular galaxy Wolf-Lundmark-Melotte similar to 968 kpc away, at a present-day metallicity of [Fe/H] similar to -0.9. These candidates have masses between 1.25 and 5 M-circle dot, with ages <10 Myr, and exhibit significant near-infrared excesses at 2.5 and 4.3 mu m. They are concentrated within a cluster roughly 10 pc (2 '') across, situated in the H ii region [HM95]-9. These are the most distant and metal-poor PMS stars known, and they can offer new quantitative insights into star formation at low metallicities.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Kalari, Venu M. | - |
NSFs NOIRLab - Chile
Gemini ObservatorySouthern Operations Center - Chile |
| 2 | SALINAS-VENEGAS, RICARDO CRISTIAN | Hombre |
Polish Acad Sci - Polonia
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences - Polonia |
| 3 | Andersen, Morten | - |
European Southern Observ - Alemania
Observatorio Europeo Austral - Alemania |
| 4 | De Marchi, Guido | - |
European Space Agcy ESA - Países Bajos
ESTEC - European Space Research and Technology Centre - Países Bajos |
| 5 | Rubio, Monica | - |
Universidad de Chile - Chile
|
| 6 | Vink, Jorick S. | - |
Armagh Observ & Planetarium - Reino Unido
Armagh Observatory - Reino Unido |
| 7 | Zinnecker, Hans | - |
Universidad Autónoma de Chile - Chile
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| Fuente |
|---|
| National Science Foundation |
| U.S. National Science Foundation |
| NASA |
| National Aeronautics and Space Administration |
| Space Telescope Science Institute |
| European Space Agency |
| Canadian Space Agency |
| Agencia Nacional de Investigación y Desarrollo |
| NOIRLab |
| NASA/ESA/CSA James Webb Space Telescope |
| ANID(CHILE) through Basal |
| Agradecimiento |
|---|
| We thank the referee for a constructive report, which greatly helped improve this work. This work is based on observations made with the NASA/ESA/CSA James Webb Space Telescope. The data were obtained from the Mikulski Archive for Space Telescopes at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-03127 for JWST. The JWST data presented in this Letter were obtained from the Mikulski Archive for Space Telescopes (MAST) at the Space Telescope Science Institute. The specific observations analyzed were taken from the the JWST Resolved Stellar Populations Early Release Science ("JWSTSTARS") page at MAST (D. Weisz 2024). The work of V.M.K. is supported by NOIRLab, which is managed by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the U.S. National Science Foundation. V.M.K. thanks Deidre Hunter for comments. M.R. wishes to acknowledge partial support from ANID(CHILE) through Basal FB210003. J.S.V. acknowledges support from grant ST/V000233/1 (PI: Vink). |
| We thank the referee for a constructive report, which greatly helped improve this work. This work is based on observations made with the NASA/ESA/CSA James Webb Space Telescope. The data were obtained from the Mikulski Archive for Space Telescopes at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-03127 for JWST. The JWST data presented in this Letter were obtained from the Mikulski Archive for Space Telescopes (MAST) at the Space Telescope Science Institute. The specific observations analyzed were taken from the the JWST Resolved Stellar Populations Early Release Science (\u201CJWSTSTARS\u201D) page at MAST (D. Weisz ). The work of V.M.K. is supported by NOIRLab, which is managed by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the U.S. National Science Foundation. V.M.K. thanks Deidre Hunter for comments. M.R. wishes to acknowledge partial support from ANID(CHILE) through Basal FB210003. J.S.V. acknowledges support from grant ST/V000233/1 (PI: Vink). |
| We thank the referee for a constructive report, which greatly helped improve this work. This work is based on observations made with the NASA/ESA/CSA James Webb Space Telescope. The data were obtained from the Mikulski Archive for Space Telescopes at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-03127 for JWST. The JWST data presented in this Letter were obtained from the Mikulski Archive for Space Telescopes (MAST) at the Space Telescope Science Institute. The specific observations analyzed were taken from the the JWST Resolved Stellar Populations Early Release Science (\u201CJWSTSTARS\u201D) page at MAST (D. Weisz ). The work of V.M.K. is supported by NOIRLab, which is managed by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the U.S. National Science Foundation. V.M.K. thanks Deidre Hunter for comments. M.R. wishes to acknowledge partial support from ANID(CHILE) through Basal FB210003. J.S.V. acknowledges support from grant ST/V000233/1 (PI: Vink). |
