Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Miquelarena, P."'
Autor:
Galarza, Jhon Yana, Reggiani, Henrique, Ferreira, Thiago, Lorenzo-Oliveira, Diego, Simon, Joshua D., McWilliam, Andrew, Schlaufman, Kevin C., Miquelarena, Paula, Trivigno, Matias Flores, Arancibia, Marcelo Jaque
Over the last decade, studies of large samples of binary systems identified chemical anomalies, and showed that they might be attributed to planet formation or planet engulfment. However, both scenarios have primarily been tested in pairs without kno
Externí odkaz:
http://arxiv.org/abs/2407.20949
Autor:
Miquelarena, P., Saffe, C., Flores, M., Petrucci, R., Galarza, J. Yana, Alacoria, J., Arancibia, M. Jaque, Jofré, E., Armijo, K. Montenegro, Gunella, F.
Aims.We conduct a high-precision differential abundance analysis of the remarkable binary system HD 240429/30 (Krios and Kronos, respectively), whose difference in metallicity is one of the highest detected in systems with similar components to date
Externí odkaz:
http://arxiv.org/abs/2406.06705
Autor:
Saffe, C., Miquelarena, P., Alacoria, J., Martioli, E., Flores, M., Arancibia, M. Jaque, Angeloni, R., Jofre, E., Galarza, J. Yana, Gonzalez, E., Collado, A.
Aims. We explore different scenarios to explain the chemical difference found in the remarkable giant-giant binary system HD 138202 + CD-30 12303. For the first time, we suggest how to distinguish these scenarios by taking advantage of the extensive
Externí odkaz:
http://arxiv.org/abs/2402.09278
Autor:
Saffe, C., Alacoria, J., Miquelarena, P., Petrucci, R., Arancibia, M. Jaque, Angeloni, R., Martioli, E., Flores, M., Jofre, E., Collado, A., Gunella, F.
Publikováno v:
A&A 668, A157 (2022)
Am stars are often components of short-period binary systems, where tidal interactions would result in low rotational velocities and help to develop the chemical peculiarities observed. However, the origin of single Am stars and Am stars that belong
Externí odkaz:
http://arxiv.org/abs/2209.14257
Autor:
Alacoria, J., Saffe, C., Arancibia, M. Jaque, Angeloni, R., Miquelarena, P., Flores, M., Veramendi, M. E., Collado, A.
Publikováno v:
A&A 660, A98 (2022)
Our aim is to test the accretion scenario of lambda Boo stars. This model predicts that a binary system with two early-type stars passing through a diffuse cloud should both display the same superficial peculiarity. We carried out a detailed abundanc
Externí odkaz:
http://arxiv.org/abs/2202.05066
Autor:
Galarza, J. Y., López-Valdivia, R., Lorenzo-Oliveira, D., Reggiani, H., Meléndez, J., Gamarra-Sánchez, D., Flores, M., Portal-Rivera, J., Miquelarena, P., Ponte, G., Schlaufman, K. C., Auccalla, T. V.
Solar twins are key in different areas of astrophysics, however only just over a hundred were identified and well-studied in the last two decades. In this work, we take advantage of the very precise \textit{Gaia} (DR2/EDR3), Tycho and 2MASS photometr
Externí odkaz:
http://arxiv.org/abs/2104.02806
Publikováno v:
Cerâmica, Vol 69, Iss 390, Pp 125-132 (2023)
Abstract Adhesion and homogeneity of the coating-substrate were analyzed on the basis of the establishment of coating mineralogy. Substrate raw materials used were kaolin clay and a calcined alumina 4 µm; a series of higher density ceramic coatings
Externí odkaz:
https://doaj.org/article/63ccb7ed4b364a329e23a5bc8da1dbdc
Autor:
Saffe, C., Miquelarena, P., Alacoria, J., Flores, M., Arancibia, M. Jaque, Calvo, D., Girardi, G. Martín, Grosso, M., Collado, A.
Publikováno v:
A&A 647, A49 (2021)
Aims. To explore the chemical pattern of early-type stars with planets, searching for a possible signature of planet formation. In particular, we study a likely relation between the lambda Bootis chemical pattern and the presence of giant planets. Me
Externí odkaz:
http://arxiv.org/abs/2101.04416
Autor:
Flores, M., Arancibia, M. Jaque, Bustos, R. V. Ibañez, Buccino, A. P., Galarza, J. Yana, Nuñez, N. E., Miquelarena, P., Alacoria, J., Saffe, C., Mauas, Pablo J. D.
Publikováno v:
A&A 645, L6 (2021)
Context. It is well known that from 1645 to 1715 solar activity was notably low and the number of sunspots was extremely reduced. This epoch is known as the Maunder Minimum (MM). The study of stars in prolonged activity minima like the MM could help
Externí odkaz:
http://arxiv.org/abs/2012.08983
Autor:
Saffe, C., Miquelarena, P., Alacoria, J., Gonzalez, J. F., Flores, M., Arancibia, M. Jaque, Calvo, D., Jofre, E., Collado, A.
Publikováno v:
A&A 641, A145 (2020)
Context. The detection of planets orbiting chemically peculiar stars is very scarcely known in the literature. Aims. To determine the detailed chemical composition of the remarkable planet host star KELT-17. This object hosts a hot-Jupiter planet wit
Externí odkaz:
http://arxiv.org/abs/2007.14210