Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Levenhagen, Ronaldo"'
Publikováno v:
Bull. Soc. R. Sci. Liege, 2023, 92(2), 1 - 4
We present an update of the grid of detailed atmosphere models and homogeneous synthetic spectra for hot, high-gravity subdwarf stars. High-resolution spectra and synthetic photometry were calculated in the wavelength range 1,000 \r{A} - 10,000 \r{A}
Externí odkaz:
http://arxiv.org/abs/2307.08362
In this work we present a grid of LTE and non-LTE synthetic spectra of hot DA white dwarfs (WDs). In addition to its usefulness for the determination of fundamental stellar parameters of isolated WDs and in binaries, this grid will be of interest for
Externí odkaz:
http://hdl.handle.net/10150/624926
http://arizona.openrepository.com/arizona/handle/10150/624926
http://arizona.openrepository.com/arizona/handle/10150/624926
Be stars are found to rotate close to their critical rotation and therefore they are considered as an important laboratory of study for stellar rotation. In this context, we obtain the projected rotational velocity of a sample of classical Be Souther
Externí odkaz:
http://arxiv.org/abs/2201.08695
Publikováno v:
The Astrophysical Journal Supplement Series, 256:41 (10pp), 2021
A new grid of detailed atmosphere model spectra for hot and moderately cool subdwarf stars is presented. High-resolution spectra and synthetic photometry are calculated in the range from 1000{\AA} to 10,000{\AA} using Non-LTE fully line-blanketed atm
Externí odkaz:
http://arxiv.org/abs/2110.02229
Autor:
Amores, Eduardo B., Jesus, Ricardo M., Moitinho, Andre, Arsenijevic, Vladan, Levenhagen, Ronaldo S., Marshall, Douglas J., Kerber, Leandro O., Kunzel, Roseli, Moura, Rodrigo A.
Estimates of interstellar extinction are essential in a broad range of astronomical research. In the last decades, several maps and models of the large scale interstellar extinction in the Galaxy have been published. However, these maps and models ha
Externí odkaz:
http://arxiv.org/abs/2108.00561
Autor:
Levenhagen, Ronaldo Savarino
A espectrocopia de estrelas Be realizada com alta resolução e alta relação sinal/ruído permite investigar variações temporais rápidas nos perfis de linhas de absorção, usualmente atribuidas às pulsações não radiais, entre outros mecanis
A study on the photosphere and disc of the Be star $\beta$ Psc is presented. We recover almost 40 years of high-resolution spectroscopic observations and additional data gathered from the BeSS database. We evaluate the photospheric parameters from th
Externí odkaz:
http://arxiv.org/abs/2009.06493
Akademický článek
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Autor:
Chojnowski, S. Drew, Labadie-Bartz, Jonathan, Rivinius, Thomas, Gies, Douglas, Panoglou, Despina, Fernandes, Marcelo Borges, Wisniewski, John P., Whelan, David G., Mennickent, Ronald E., McMillan, Russet, Dembicky, Jack M., Gray, Candace, Rudyk, Ted, Stringfellow, Guy S., Lester, Kathryn, Hasslequist, Sten, Zharikov, Sergey, Levenhagen, Ronaldo, Souza, Tiago, Leister, Nelson, Staussan, Keivan, Siverd, Robert J., Majewski, Steven R.
Prompted by peculiar spectroscopic variability observed in SDSS/APOGEE $H$-band spectra, we monitored the Be star HD 55606 using optical spectroscopy and found that it is an exotic double-lined spectroscopic binary (SB2) consisting of a Be star and a
Externí odkaz:
http://arxiv.org/abs/1806.06843
Autor:
Levenhagen, Ronaldo Savarino
As estrelas Be compreendem uma grande faixa de massas e temperaturas. Por definição, são objetos de tipo B com classe de luminosidade entre V e III que apresentam, ou apresentaram alguma vez, linhas de Balmer em emissão (eventualmente metais uma