Zobrazeno 1 - 10 of 18 pro vyhledávání: '"G. R. Solivella"'
1
Non-synchronous rotations in massive binary systems: HD 93343 revisited
Autor: Rodolfo H. Barbá, José Ignacio Arias, Sergio Simón-Díaz, G. Ferrero, G. R. Solivella, Roberto Claudio Gamen, C. Putkuri, N. I. Morrell
Publikováno v: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Context. Most massive stars are in binary or multiple systems. Several massive stars have been detected as double-lined spectroscopic binaries and among these, the OWN Survey has detected a non-negligible number whose components show very different s
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b5934fe4d1e21ab041c1813898be5df
https://www.aanda.org/10.1051/0004-6361/201833574
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2
Early-type stars in the open cluster NGC 4852
Autor: E. E. Giorgi, J. A. Ahumada, Ruben Angel Vazquez, G. R. Solivella
Publikováno v: Monthly Notices of the Royal Astronomical Society. 415:1355-1365
The southern open cluster NGC 4852 was re-observed in the UBVRI passbands to refine its intrinsic fundamental parameters. An extended spectral coverage was also undertaken aimed at obtaining a clear picture of the kind of stars inhabiting the cluster
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::73f4908981767d59488651495c69c179
https://doi.org/10.1111/j.1365-2966.2011.18780.x
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3
BONA FIDE, STRONG-VARIABLE GALACTIC LUMINOUS BLUE VARIABLE STARS ARE FAST ROTATORS: DETECTION OF A HIGH ROTATIONAL VELOCITY IN HR CARINAE
Autor: Roberto Claudio Gamen, D. J. Hillier, G. R. Solivella, E. Fernández-Lajús, Rodolfo H. Barbá, M. Teodoro, Augusto Damineli, A. P. Moisés, Jose H. Groh
Publikováno v: SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
We report optical observations of the luminous blue variable (LBV) HR Carinae which show that the star has reached a visual minimum phase in 2009. More importantly, we detected absorptions due to SiIV λλ4088-4116. To match their observed line profi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d9c05a448c0c063caf06dbf1aec155a5
https://doi.org/10.1088/0004-637x/705/1/l25
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4
Revealing the parameters of the open cluster Ruprecht 58
Autor: J. Núñez, E. E. Giorgi, Ruben Angel Vazquez, G. R. Solivella, R. B. Orellana
Publikováno v: New Astronomy. 12:461-470
We present results of a study that combines UBVI photometry, MK spectral classification and proper motions in the area of the, up to now unknown, open cluster Ruprecht 58 at the Puppis region. Star counts from the 2MASS data catalog together with the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1857ed745387734295e0725977ec4250
https://doi.org/10.1016/j.newast.2007.01.005
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5
The nearby Galaxy structure toward the Vela Gum nebula
Autor: Ruben Angel Vazquez, G. R. Solivella, E. E. Giorgi, G. I. Perren
We report on $UBVI$ photometry and spectroscopy for MK classification purposes carried out in the fields of five open clusters projected against the Vela Gum in the Third Galactic Quadrant of the Galaxy. They are Ruprecht 20, Ruprecht 47, Ruprecht 60
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ec7346ab09d5c0a9a8002814efaab8b
http://arxiv.org/abs/1504.01675
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6
The Vela-Puppis open clusters Pismis 8 and Pismis 13
Autor: Gustavo Baume, E. E. Giorgi, Ruben Angel Vazquez, G. R. Solivella
Publikováno v: SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
CCD UBVI imaging photometry was carried out in the fields of the open clusters Pismis 8 and Pismis 13, located in the Vela-Puppis region in our Galaxy. MK spectral types have also been determined for a number of stars located in the fields of these t
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d153bf2add337ba9291e7100ce006908
https://doi.org/10.1051/0004-6361:20041075
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7
Optical spectroscopy of X-Mega targets in the Carina nebula - VII On the multiplicity of Tr 16-112, HD 93343 and HD 93250
Autor: Eric Gosset, Hugues Sana, G. R. Solivella, A. A. Lanotte, Gregor Rauw, E. Fernández Lajús, Yaël Nazé
Publikováno v: SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
We present the results of a spectroscopic monitoring campaign devoted to three O-type stars in the Carina nebula. We derive the full SB2 orbital solution of the binary system Tr 16-112, an exceptional dissymmetrical system consisting of an O5.5-6V((f
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c91354f990891971c87236d097bba129
http://arxiv.org/abs/0906.2681
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8
The very massive x-ray bright binary system wack 2134 (= wr 21a)
Autor: Pablo Reig, G. R. Solivella, Rodolfo H. Barbá, Virpi S. Niemela, M. J. Coe, Roberto Claudio Gamen, Paula Benaglia, E. Fernández Lajús
Publikováno v: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
From the radial velocities of the N IV λ4058 and He II λ4686 emission lines, and the N v λ4604-20 absorption lines, determined in digital spectra, we report the discovery that the X-ray bright emission line star Wack 2134 (= WR 21a) is a spectrosc
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3cd950c653b26ff9722f7915cb743263
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9
Observational templates of star cluster disruption. The stellar group NGC 1901 in front of the Large Magellanic Cloud
Autor: Raúl de la Fuente Marcos, Sandro Villanova, G. R. Solivella, Christian Moni Bidin, Carlos de le Fuente Marcos, Holger Baumgardt, Giovanni Carraro
Publikováno v: SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
Context. Observations indicate that present-day star formation in the Milky Way disk takes place in stellar ensembles or clusters rather than in isolation. Bound, long-lived stellar groups are known as open clusters. They gradually lose stars and are
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::199bd78675d53d89ffdfa7b113d435e7
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10
The first orbital solution for the massive colliding-wind binary HD 93162 (=WR 25)
Autor: Hugues Sana, Rodolfo H. Barbá, Yaël Nazé, Grégor Rauw, N. I. Morrell, Virpi S. Niemela, G. R. Solivella, Roberto Claudio Gamen, E. Gosset
Publikováno v: NASA Astrophysics Data System
ASTRONOMY & ASTROPHYSICS
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Scopus-Elsevier
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Context. Since the discovery, with the EINSTEIN satellite, of strong X-ray emission associated with HD 93162 (≡WR 25), this object has been predicted to be a colliding-wind binary system. However, radial-velocity variations that would prove the sus
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::186eb2ccbdd9535235d7fea412d1d295
https://www.aanda.org/articles/aa/abs/2006/48/aa5618-06/aa5618-06.html
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