Zobrazeno 1 - 10
of 354
pro vyhledávání: '"Araya I"'
Autor:
Rubio, A. C., Carciofi, A. C., Ticiani, P., Mota, B. C., Vieira, R. G., Faes, D. M., Genaro, M., de Amorim, T. H., Klement, R., Araya, I., Arcos, C., Curé, M., de Souza, A. Domiciano, Georgy, C., Jones, C. E., Suffak, M. W., Silva, A. C. F.
Classical Be stars are fast rotating, near main sequence B-type stars. The rotation and the presence of circumstellar discs profoundly modify the observables of active Be stars. Our goal is to infer stellar and disc parameters, as well as distance an
Externí odkaz:
http://arxiv.org/abs/2309.06168
V4142 Sgr: a Double Periodic Variable with an accretor surrounded by the accretion-disk's atmosphere
Autor:
Rosales, J. A., Mennickent, R. E., Djurašević, G., Araya, I., Curé, M., Schleicher, D. R. G., Petrović, J.
Publikováno v:
Astronomy & Astrophysics,670,2023,A94
Context: A detailed study of the close interacting binary V4142\,Sgr based on photometric and spectroscopic analysis is presented.This system belongs to the enigmatic class of Algol-like variables showing a long photometric cycle of unknown nature. A
Externí odkaz:
http://arxiv.org/abs/2302.10962
Autor:
Hadjara, M., Petrov, R. G., Jankov, S., Cruzalèbes, P., Boskri, A., Spang, A., Lagarde, S., He, J., Chen, X., Nitschelm, C., de Almeida, E. S. G., Pereira, G., Michael, E. A., Gao, Q., Wang, W., Reyes, I., Arcos, C., Araya, I., Curé, M.
Publikováno v:
MNRAS 511, 4724-4740 (2022)
Differential Interferometry allows to obtain the differential visibility and phase, in addition to the spectrum. The differential phase contains important information about the structure and motion of stellar photosphere such as stellar spots and non
Externí odkaz:
http://arxiv.org/abs/2203.10372
Autor:
Rosales, J. A., Mennickent, R. E., Djurašević, G., González, J. F., Araya, I., Cabezas, M., Schleicher, D. R. G., Curé, M.
Publikováno v:
The Astronomical Journal, 161, 2012, 165
We present a detailed photometric and spectroscopic analysis of DD CMa, based on published survey photometry and new spectroscopic data. We find an improved orbital period of $P_\mathrm{o}= 2.0084530 \pm 0.0000006 ~\mathrm{d}$. Our spectra reveal H$\
Externí odkaz:
http://arxiv.org/abs/2109.00234
Autor:
Rosales, J. A., Mennickent, R. E., Djurašević, G., Schleicher, D. R. G., Zharikov, S., Araya, I., Celedón, L., Curé, M.
Publikováno v:
The Astronomical Journal, 162, 2021, 66
We present a photometric and spectroscopic study of HD 50526, an ellipsoidal binary member of the group Double Periodic Variable stars. Performing data-mining in photometric surveys and conducting new spectroscopic observations with several spectrogr
Externí odkaz:
http://arxiv.org/abs/2109.00231
Autor:
Araya, I., Christen, A., Curé, M., Cidale, L. S., Venero, R. O. J., Arcos, C., Gormaz-Matamala, A. C., Haucke, M., Escárate, P., Clavería, H.
Accurate mass-loss rates and terminal velocities from massive stars winds are essential to obtain synthetic spectra from radiative transfer calculations and to determine the evolutionary path of massive stars. From a theoretical point of view, analyt
Externí odkaz:
http://arxiv.org/abs/2104.03263
Publikováno v:
Epigenetics & Chromatin, Vol 3, Iss 1, p 14 (2010)
Abstract Background Incorporation of histone variants into chromatin is one of the epigenetic mechanisms used for regulation of gene expression. Macro (m)H2A is a histone variant that has two different subtypes in vertebrates: mH2A1 and mH2A2. It is
Externí odkaz:
https://doaj.org/article/d738407c4f2e4cb1a4f28dfa93725842
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 476, 3039 (2018)
Double Periodic Variables (DPV) are among the new enigmas of semi-detached eclipsing binaries. These are intermediate-mass binaries characterized by a long photometric period lasting on average 33 times the orbital period. We present a spectroscopic
Externí odkaz:
http://arxiv.org/abs/1801.08659
The Be phenomenon is present in about 20$\%$ of the B-type stars. Be stars show variability on a broad range of timescales, which in most cases is related to the presence of a circumstellar disk of variable size and structure. For this reason a time
Externí odkaz:
http://arxiv.org/abs/1711.08675
As the disk formation mechanism(s) in Be stars is(are) as yet unknown, we investigate the role of rapidly rotating radiation-driven winds in this process. We implemented the effects of high stellar rotation on m-CAK models accounting for: the shape o
Externí odkaz:
http://arxiv.org/abs/1708.00473