The VISCACHA survey - II. Structure of star clusters in the Magellanic Clouds periphery

Autor(es):Mostrar menos -

Santos Jr, Joao F. C. ; Maia, Francisco F. S. ^[1] ; Dias, Bruno ^[2] ; Kerber, Leandro de O. ^[3] ; Piatti, Andres E. ^{[4, 5]} ; Bica, Eduardo ^[6] ; Angelo, Mateus S. ^[7] ; Minniti, Dante ^{[8, 9, 10]} ; Perez-Villegas, Angeles ^[11] ; Roman-Lopes, Alexandre ^[12] ; Westera, Pieter ^[13] ; Fraga, Luciano ^[14] ; Quint, Bruno ^[15] ; Sanmartim, David ^[16]

Afiliação do(s) autor(es):Mostrar menos -

^[1] Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, RJ - Brazil

^[2] Univ Tarapaca, Inst Alta Invest, Casilla 7D, Arica 1000000 - Chile

^[3] Univ Estadual Santa Cruz, Dept Ciencias Exatas & Tecnol, Rodovia Jorge Amado Km 16, BR-45662900 Ilheus, BA - Brazil

^[4] CONICET UNCUYO, Inst Interdisciplinario Ciencias Basicas ICB, Padre J Contreras 1300, M5502JMA, Mendoza - Argentina

^[5] Consejo Nacl Invest Cient & Tecn, Godoy Cruz 2290, C142SFQB, Buenos Aires, DF - Argentina

^[6] IF UFRGS, Dept Astron, Av Bento Goncalves 9500, BR-91501970 Porto Alegre, RS - Brazil

^[7] Ctr Fed Educ Tecnol Minas Gerais, Av Monsenhor Luiz de Gonzaga 103, BR-37250000 Nepomuceno, MG - Brazil

^[8] Millennium Inst Astrophys, Av Vicuna Mackenna 4860, Santiago 7820436 - Chile

^[9] Univ Andres Bello, Dept Ciencias Fis, Fernandez Concha 700, Santiago 7550000 - Chile

^[10] Vatican Observ, I-00120 Vatican City, Vatican City St - Vatican

^[11] Univ Sao Paulo, IAG, Rua Matao 1226, Cidade Univ, BR-05508900 Sao Paulo - Brazil

^[12] Santos Jr, Jr., Joao F. C., Univ La Serena, Dept Astron, Av Juan Cisterns 1200 North, La Serena 1700000 - Chile

^[13] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Ave Estados 5001, BR-09210580 Santo Andre, SP - Brazil

^[14] Lab Nacl Astrofis, Rua Estados Unidos 154, BR-37504364 Itajuba - Brazil

^[15] AURA, NSFs OIR Lab, Gemini Observ, Casilla 603, La Serena 1700000 - Chile

^[16] Carnegie Inst Sci, Las Campanas Observ, 601 Casilla, La Serena 1700000 - Chile

• Tipo de documento: Artigo Científico
• Fonte: Monthly Notices of the Royal Astronomical Society; v. 498, n. 1, p. 205-222, OCT 2020.
• Citações Web of Science: 0

Resumo

We provide a homogeneous set of structural parameters of 83 star clusters located at the periphery of the Small Magellanic Cloud (SMC) and the Large Magellanic Cloud (LMC). The clusters' stellar density and surface brightness profiles were built from deep, AO assisted optical images, and uniform analysis techniques. The structural parameters were obtained from King and Elson et al. model fittings. Integrated magnitudes and masses (for a subsample) are also provided. The sample contains mostly low surface brightness clusters with distances between 4.5 and 6.5 kpc and between 1 and 6.5 kpc from the LMC and SMC centres, respectively. We analysed their spatial distribution and structural properties, comparing them with those of inner clusters. Half-light and Jacobi radii were estimated, allowing an evaluation of the Roche volume tidal filling. We found that: (i) for our sample of LMC clusters, the tidal radii are, on average, larger than those of inner clusters from previous studies; (ii) the core radii dispersion tends to be greater for LMC clusters located towards the southwest, with position angles of similar to 200 degrees and about similar to 5 degrees from the LMC centre, i.e. those LMC clusters nearer to the SMC; (iii) the core radius evolution for clusters with known age is similar to that of inner clusters; (iv) SMC clusters with galactocentric distances closer than 4 kpc are overfilling; (v) the recent Clouds collision did not leave marks on the LMC clusters' structure that our analysis could reveal. (AU)

• Processo FAPESP: 17/15893-1 - Órbitas de aglomerados globulares do bojo: formação e evolução da Via Láctea
• Beneficiário: Maria de Los Angeles Perez Villegas
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado