Výsledky vyhledávání

The periodicity of the Eta Carinae events

Autor: Virpi S. Niemela, Otmar Stahl, F. Gonzalez, M. Teodoro, Mónica Grosso, Augusto Damineli, J. F. Albacete Colombo, D. J. Hillier, Jose H. Groh, Nidia Morrell, Nelson Vani Leister, George Wallerstein, R. S. Levenhagen, Julia Ines Arias, Michael F. Corcoran, Roberto Claudio Gamen, Hugo Levato

Publikováno v: RID-UNRN (UNRN)
Universidad Nacional de Río Negro
instacron:UNRN
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP

Extensive spectral observations of η Carinae over the last cycle, and particularly around the 2003.5 low-excitation event, have been obtained. The variability of both narrow and broad lines, when combined with data taken from two earlier cycles, rev

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b0a31fa24e6bcd88da4b57da285b8d74
https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2505

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Confirmation of the Luminous Blue Variable Status of MWC 930

Autor: J. Zsargo, Hugo Levato, K. M. Ivarsen, Sergey Zharikov, Richard C. Puetter, Josh Haislip, Kirk Crawford, R. J. Rudy, Mónica Grosso, Aaron P. LaCluyze, Nadine Manset, Jose H. Groh, Melissa C. Nysewander, J. A. Juarez Jimenez, Anatoly S. Miroshnichenko, Daniel E. Reichart, E. A. Laag

Publikováno v: Advances in Astronomy
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Advances in Astronomy, Vol 2014 (2014)

We present spectroscopic and photometric observations of the emission-line star MWC 930 (V446 Sct) during its long-term optical brightening in 2006--2013. Based on our earlier data we suggested that the object has features found in Luminous Blue Vari

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::398b96348e0b24849651d6b4cd5e2292
https://doi.org/10.1155/2014/130378

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Rotational Velocities of Southern B Stars and a Statistical Discussion of the Rotational Properties

Autor: Mónica Grosso, Hugo Levato

Publikováno v: Publications of the Astronomical Society of the Pacific. 125:1191-1199

We have measured the projected rotational velocities of 1023 southern B stars listed in the Bright Star Catalog (BSC) and calibrated them against the 1975 Slettebak et al. system. We joined the sample with the 1091 mostly northern stars of the BSC wh

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e12f72f855e8de9b90b0a72bdd3def1f
https://doi.org/10.1086/673401

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DIVISION XII / COMMISSION 46 / PROGRAM GROUP WORLD-WIDE DEVELOPMENT OF ASTRONOMY

Autor: John B. Hearnshaw, Alan H. Batten, A. Athem Alsabti, Julieta Fierro, Edward F. Guinan, Yoshihide Kozai, Hugo Levato, Hakim L. Malasan, Laurence A. Marschall, Peter Martinez, Jayant V. Narlikar, J. Pereira Osório, Jay M. Pasachoff, D. Kala Perkins, Jin Zhu

Publikováno v: Proceedings of the International Astronomical Union. 4:429-435

The Program Group for World-wide Development of Astronomy (PG-WWDA) is one of nine Commission 46 program groups engaged with various aspects of astronomical education or development of astronomy education and research in the developing world. In the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1210dda1f3ca66497d5b1a8f463ba3b4
https://doi.org/10.1017/s174392130802601x

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DIVISION XII / COMMISSION 46 / PROGRAM GROUP WORLD-WIDE DEVELOPMENT OF ASTRONOMY

Autor: John B. Hearnshaw, Alan H. Batten, A. Athem Alsabti, Julieta Fierro, Richard O. Gray, Mary Kay M. Hemenway, Yoshihide Kozai, Hugo Levato, Hakim L. Malasan, Peter Martinez, Jayant V. Narlikar, Donat G. Wentzel, James C. White

Publikováno v: Proceedings of the International Astronomical Union. 3:234-237

The Program Group for the World-wide Development of Astronomy (PG-WWDA) is one of nine Commission 46 program groups engaged with various aspects of astronomical education or development of astronomy education and research in the developing world. In

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ff69fc8d6e9ff47ae07c2050fce6ed11
https://doi.org/10.1017/s1743921308024253

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A New Setup for Ground‐based Measurements of Solar Activity at 10 μm

Autor: Hugo Levato, A. Marun, Jean-Pierre Raulin, A. S. Kudaka, A. M. Melo, P. Pereyra, R. Marcon, Pierre Kaufmann

Publikováno v: Publications of the Astronomical Society of the Pacific. 118:1558-1563

Solar activity measurements in the far‐ to mid‐IR range are receiving renewed interest as part of an effort to complement recent results obtained at submillimeter wavelengths. A new setup has been developed to measure solar activity in the infrar

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6fe030164da64b0b879525dd73873c0f
https://doi.org/10.1086/509267

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Formal education in astronomy in Latin America

Autor: Hugo Levato

Publikováno v: Proceedings of the International Astronomical Union. 2:27-30

We review the present situation of the formal education in astronomy in the Latin American countries. We have concluded that we can divide the countries into three categories according with the different development of the astronomical careers in ast

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0e637221e85ebcf6c988ffd3ff0711f3
https://doi.org/10.1017/s1743921307006643

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MWC 930 -- a new luminous blue variable candidate

Autor: R. J. Rudy, Mónica Grosso, S. M. Mazuk, David K. Lynch, Karen S. Bjorkman, K. N. Grankin, Hugo Levato, Anatoly S. Miroshnichenko, R. C. Puetter

Publikováno v: Monthly Notices of the Royal Astronomical Society. 364:335-343

We present the results of optical high-resolution and near-infrared low-resolution spectroscopy and multicolour optical and near-infrared photometry of the emission-line star MWC 930. The spectrum is rich with Fen emissions, most of which have P Cyg-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b7081f828d9fde97baaa82ee6d852996
https://doi.org/10.1111/j.1365-2966.2005.09567.x

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Properties of galactic B[e] supergiants

Autor: Anatoly S. Miroshnichenko, Karen S. Bjorkman, Hugo Levato, Mónica Grosso, K. Hinkle, F. Marang

Publikováno v: Astronomy & Astrophysics. 436:653-659

We present the results of optical and near-IR spectroscopic and near-IR photometric observations of the emission-line stars Hen3-298 and Hen3-303. Strong emission in the H-alpha line is found in both objects. The presence of Fe II and [O I] emission

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d57267b1657ea98c366bec62b44ae4ec
https://doi.org/10.1051/0004-6361:20052726

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Diffuse Component Spectra of Solar Active Regions at Submillimeter Wavelengths

Autor: Adriana V. R. Silva, C. G. Giménez de Castro, Joaquim E. R. Costa, Hugo Levato, Tatiana F. Laganá, M. G. Rovira, Pierre Kaufmann

Publikováno v: Solar Physics. 227:265-281

Solar maps at 212 and 405 GHz obtained by the Solar Submillimetric Telescope (SST) show regions of enhanced brightness temperature, which coincide with the location of active regions. A statistical study of the radio emission from these active region

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8ff21e6d98b05f51d9dd9d943dc1f2f4
https://doi.org/10.1007/s11207-005-2787-6

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