Zobrazeno 1 - 10
of 73
pro vyhledávání: '"T. A. A. Sigut"'
Autor:
T. A. A. Sigut, Nastaran R. Ghafourian
Publikováno v:
The Astrophysical Journal, Vol 948, Iss 1, p 34 (2023)
Using a sample of 92 Galactic Be stars, we compare inclination angles (the angle between a star’s rotation axis and the line of sight) determined from H α emission-line profile fitting to those determined by the spectroscopic signature of gravitat
Externí odkaz:
https://doaj.org/article/eb0f480f4bec4bfa9233cb55f6df7ffc
Publikováno v:
RID-UNRN (UNRN)
Universidad Nacional de Río Negro
instacron:UNRN
Universidad Nacional de Río Negro
instacron:UNRN
Fil: Granada, Anahi. Universidad Nacional de Rio Negro, CITECCA. Río Negro, Argentina. Fil: Jones, Carol E. University of Western Ontario, Canada Fil: Sigut, Aaron. University of Western Ontario, Canada Using hydrodynamic principles we investigate t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99a38ff839e6d296840a91e4fdbe7797
http://rid.unrn.edu.ar/handle/20.500.12049/8731
http://rid.unrn.edu.ar/handle/20.500.12049/8731
We demonstrate that the angle between star's rotation axis and the observer's line-of-sight, usually called the inclination angle, can be reliably determined for Be stars via H$\alpha$ emission-line profile fitting. We test our method on a sample of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cfaf9712716498ab2c11b977b007b6bc
http://arxiv.org/abs/2003.11574
http://arxiv.org/abs/2003.11574
Autor:
Benjamin F. Williams, Alexia R. Lewis, Jamie R. Lomax, M. Durbin, M. Peters, Y. Choi, John P. Wisniewski, T. A. A. Sigut, Julianne J. Dalcanton, J. Lutz, L. C. Johnson, A. Wallach
We present results from a 2-epoch HST H$\alpha$ emission line survey of the Andromeda Galaxy that overlaps the footprint of the Panchromatic Hubble Andromeda Treasury (PHAT) survey. We find 552 (542) classical Be stars and 8429 (8556) normal B-type s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e46bc6b4b92cce9dfd28fdebeceea39
http://arxiv.org/abs/1912.05627
http://arxiv.org/abs/1912.05627
Autor:
T. A. A. Sigut, Anahí Granada, Sylvia Ekström, T. Semaan, Carol E. Jones, Georges Meynet, Cyril Georgy
Publikováno v:
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
RID-UNRN (UNRN)
Universidad Nacional de Río Negro
instacron:UNRN
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
RID-UNRN (UNRN)
Universidad Nacional de Río Negro
instacron:UNRN
Through the modeling of near-infrared photometry of star-plus disk systems with the codes bedisk/beray, we successfully describe the Wide-Field Infrared Survey Explorer (WISE) photometric characteristics of Be stars in five young open clusters, NGC 6
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a98958106fab542441aba66f9562e3db
https://arxiv.org/abs/1712.05209v1
https://arxiv.org/abs/1712.05209v1
We utilize a multi-step modelling process to produce synthetic interferometric and spectroscopic observables, which are then compared to their observed counterparts. Our extensive set of interferometric observations of the Be star 48 Per, totaling 29
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e9a6c0728acbd12f7dc37178f6d688e
http://arxiv.org/abs/1704.08733
http://arxiv.org/abs/1704.08733
The circumstellar disk density distributions for a sample of 63 Be southern stars from the BeSOS survey were found by modelling their H$\alpha$ emission line profiles. These disk densities were used to compute disk masses and disk angular momenta for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::67a1010418dea04d99192a1a792106ba
http://arxiv.org/abs/1704.08133
http://arxiv.org/abs/1704.08133
We investigate the physical properties of the inner gaseous disks of the three, hot, Herbig B2e stars, HD 76534, HD 114981 and HD 216629, by modelling CFHT-ESPaDOns spectra using non-LTE radiative transfer codes. We assume that the emission lines are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1919bb1e0119dd8ad7377008a7ec14bf
http://arxiv.org/abs/1701.06721
http://arxiv.org/abs/1701.06721
Autor:
T. A. A. Sigut, A. F. Ahmed
Photospheric nitrogen abundances for a sample of 26 Be stars and 16 normal B stars were found using high-resolution spectra from the Magnetism in Massive Stars (MiMeS) spectroscopic survey. Nitrogen abundances were obtained using non-LTE equivalent w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1dd21c583d2f1b633b98d1fee9f86ea5
Publikováno v:
The Astrophysical Journal Supplement Series. 187:228-250
We present a set of theoretical Hα emission-line profiles of Be stars, created by systematically varying model input parameters over a wide range of accepted values. Models were generated with a non-LTE radiative transfer code that incorporates a no