| Texto completo | |
| Autor(es): |
Gregorio-Hetem, J.
[1]
;
Lefloch, B.
[2]
;
Hetem, A.
[3]
;
Montmerle, T.
[4]
;
Fernandes, B.
[1]
;
Mendoza, E. F.
[1, 5]
;
De Simone, M.
[2, 6]
Número total de Autores: 7
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, BR-05508090 Sao Paulo - Brazil
[2] Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble - France
[3] UFABC Fed Univ ABC, Av Estados 5001, BR-09210580 Santo Andre, SP - Brazil
[4] Inst Astrophys Paris, F-75014 Paris - France
[5] Univ Fed Rio de Janeiro, Observ Valongo, BR-20080090 Rio de Janeiro, RJ - Brazil
[6] Osserv Astrofis Arcetri, INAF, Largo E Fermi 5, I-50125 Florence - Italy
Número total de Afiliações: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Astronomy & Astrophysics; v. 654, OCT 25 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
Context. The relationship between young stellar clusters and their respective parental molecular clouds remains an open issue. Recent inquiries consider the similarities between substructures of clouds and clusters and whether they are a coincidence or, rather, an indication of a physical relationship. To address these issues, we studied the CMa OB1/R1 region, which shows evidence of a complex star formation history. Aims. We obtained molecular cloud mapping with the IRAM-30 metre telescope to reveal the physical conditions of an unexplored side of the CMa region with the aim of comparing the morphology of the clouds to the distribution of young stellar objects (YSOs). We also studied the cloud kinematics in pursuit of gradients and jet signatures that could trace different star formation scenarios. Methods. The YSOs were selected on the basis of astrometric data from Gaia EDR3 that characterize the moving groups. The distance of 1099(-24)(+25) pc was obtained for the sample, based on the mean error-weighted parallax. Optical and near-infrared photometry was used to verify the evolutionary status and circumstellar characteristics of the YSOs. Results. Among the selected candidates, we found 40 members associated with the cloud: 1 Class I, 11 Class II, and 28 Class III objects. Comparing the spatial distribution of the stellar population with the cores revealed by the (CO)-C-13 map, we verified that peaks of emission coincide with the position of YSOs, confirming the association of these objects to their dense natal gas. Conclusions. Our observations support the large-scale scenario of the CMa shell-like structure formation as a relic of successive supernova events. (AU) | |
| Processo FAPESP: | 14/22095-6 - ACHEMOS: astroquímica da nossa origem, um estudo abrangente da química prebiótica em regiões pré-estelares |
| Beneficiário: | Edgar Fabián Mendoza Rodríguez |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 17/19458-8 - Uso de estatística fractal na busca de parâmetros estruturais em grupos de estrelas jovens |
| Beneficiário: | Annibal Hetem Junior |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 14/18100-4 - Populações estelares na Via Láctea: bojo, halo, disco e regiões de formação de estrelas; instrumentação para espectroscopia de alta resolução |
| Beneficiário: | Beatriz Leonor Silveira Barbuy |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |