| Full text | |
| Author(s): Show less - |
Fernandez-Trincado, Jose G.
[1, 2, 3]
;
Beers, Timothy C.
[4, 5]
;
Minniti, Dante
[6, 7]
;
Carigi, Leticia
[8]
;
Placco, Vinicius M.
[9]
;
Chun, Sang-Hyun
[10]
;
Lane, Richard R.
[1]
;
Geisler, Doug
[11, 12, 13]
;
Villanova, Sandro
[11]
;
Souza, Stefano O.
[14]
;
Barbuy, Beatriz
[14]
;
Perez-Villegas, Angeles
[15]
;
Chiappini, Cristina
[16, 17]
;
Queiroz, Anna. B. A.
[16]
;
Tang, Baitian
[18]
;
Alonso-Garcia, Javier
[19, 20]
;
Piatti, Andres E.
[21, 22]
;
Palma, Tali
[23, 24]
;
Alves-Brito, Alan
[25]
;
Bidin, Christian Moni
[26]
;
Roman-Lopes, Alexandre
[12]
;
Munoz, Ricardo R.
[27]
;
Singh, Harinder P.
[28]
;
Kundu, Richa
[28, 29]
;
Chaves-Velasquez, Leonardo
[30, 31]
;
Romero-Colmenares, Maria
[20]
;
Longa-Pena, Penelope
[20]
;
Soto, Mario
[1]
;
Vieira, Katherine
[1]
Total Authors: 29
|
| Affiliation: Show less - | [1] Univ Bourgogne Franche Comte, Inst Utinam, CNRS UMR 6213, OSU THETA Franche Comte, Observ Besancon, BP 1615, F-25010 Besancon - France
[2] Univ Atacama, Inst Astron & Ciencias Planetarias, Copayapu 485, Copiapo - Chile
[3] Univ Bernardo OHiggins, Ctr Invest Astron, Ave Viel 1497, Santiago - Chile
[4] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 - USA
[5] Univ Notre Dame, JINA Ctr Evolut Elements, Notre Dame, IN 46556 - USA
[6] Vatican Observ, I-00120 Vatican City - Vatican
[7] Univ Andres Bello, Dept Cs Fis, Fac Ciencias Exactas, Ave Fernandez Concha 700, Santiago - Chile
[8] Univ Nacl Autonoma Mexico, Inst Astron, AP 70-264, Mexico City 04510, DF - Mexico
[9] NSFs Natl Opt Infrared Astron Res Lab, Tucson, AZ 85719 - USA
[10] Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055 - South Korea
[11] Univ Concepcion, Dept Astron, Casilla 160-C, Concepcion - Chile
[12] Univ La Serena, Dept Astron, La Serena 1700000 - Chile
[13] Univ La Serena, Inst Invest Multidisciplinario Ciencia & Tecn, Benavente 980, La Serena - Chile
[14] Univ Sao Paulo, IAG, Rua Matao 1226, Cidade Univ, BR-05508900 Sao Paulo - Brazil
[15] Univ Nacl Autonoma Mexico, Inst Astron, Apdo Postal 106, Ensenada 22800, BC - Mexico
[16] Leibniz Inst Astrophys Potsdam AIP, Sternwarte 16, D-14482 Potsdam - Germany
[17] Lab Interinst & Astron LIneA, Rua Gal Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ - Brazil
[18] Sun Yat Sen Univ, Sch Phys & Astron, Zhuhai 519082 - Peoples R China
[19] Millennium Inst Astrophys, Santiago - Chile
[20] Univ Antofagasta, Ctr Astron CITEVA, Ave Angamos 601, Antofagasta - Chile
[21] Consejo Nacl Invest Cient & Tecn CONICET, Godoy Cruz 2290, C1425FQB, Buenos Aires, DF - Argentina
[22] CONICET UNCUYO, Inst Interdisciplinario Ciencias Basicas ICB, Padre J Contreras 1300, M5502JMA, Mendoza - Argentina
[23] Consejo Nacl Invest Cient & Tecn CONICET, Godoy Cruz 2290, Buenos Aires, DF - Argentina
[24] Univ Nacl Cordoba, Observ Astron Cordoba, Laprida 854, RA-5000 Cordoba - Argentina
[25] Univ Fed Rio Grande do Sul, Inst Fis, Ave Bento Goncalves 9500, Porto Alegre, RS - Brazil
[26] Univ Catolica Norte, Inst Astron, Ave Angamos 0610, Antofagasta - Chile
[27] Univ Chile, Dept Astron, Camino Observ 1515, Santiago - Chile
[28] Univ Delhi, Dept Phys & Astrophys, Delhi 110007 - India
[29] European Southern Observ, Alonso Cordova 3107, Santiago 7630000 - Chile
[30] Univ Narino, Univ Narino Observ, Sede VIIS, Ave Panamer, Narino - Colombia
[31] Univ Narino, Dept Fis, Torobajo Calle 18 Carrera 50, Narino - Colombia
Total Affiliations: 31
|
| Document type: | Journal article |
| Source: | Astronomy & Astrophysics; v. 647, MAR 11 2021. |
| Web of Science Citations: | 1 |
| Abstract | |
The central ('bulge') region of the Milky Way is teeming with a significant fraction of mildly metal-deficient stars with atmospheres that are strongly enriched in cyanogen ((CN)-C-12-N-14). Some of these objects, which are also known as nitrogen-enhanced stars, are hypothesised to be relics of the ancient assembly history of the Milky Way. Although the chemical similarity of nitrogen-enhanced stars to the unique chemical patterns observed in globular clusters has been observed, a direct connection between field stars and globular clusters has not yet been proven. In this work, we report on high-resolution, near-infrared spectroscopic observations of the bulge globular cluster NGC 6723, and the serendipitous discovery of a star, 2M18594405-3651518, located outside the cluster (near the tidal radius) but moving on a similar orbit, providing the first clear piece of evidence of a star that was very likely once a cluster member and has recently been ejected. Its nitrogen abundance ratio ({[}N/Fe] greater than or similar to +0.94) is well above the typical Galactic field-star levels, and it exhibits noticeable enrichment in the heavy s-process elements (Ce, Nd, and Yb), along with moderate carbon enrichment; all characteristics are known examples in globular clusters. This result suggests that some of the nitrogen-enhanced stars in the bulge likely originated from the tidal disruption of globular clusters. (AU) | |
| FAPESP's process: | 18/22044-3 - Bulge globular clusters: relics of the early formation of the galaxy |
| Grantee: | Stefano Oliveira de Souza |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |