Search Results - "Gamen, R. C"

Bona Fide, Strong-Variable Galactic Luminous Blue Variable Stars are Fast Rotators: Detection of a High Rotational Velocity in HR Carinae by Groh, J. H, Damineli, A, Hillier, D. J, Barbá, R, Fernández-Lajús, E, Gamen, R. C, Moisés, A. P, Solivella, G, Teodoro, M

“…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…”
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The very massive X-ray bright binary system Wack 2134 (= WR 21a) by Niemela, V. S., Gamen, R. C., Barbá, R. H., Fernández Lajús, E., Benaglia, P., Solivella, G. R., Reig, P., Coe, M. J.

“…From the radial velocities of the N ivλ4058 and He iiλ4686 emission lines, and the N vλ4604-20 absorption lines, determined in digital spectra, we report the…”
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The nearest star of spectral type O3: a component of the multiple system HD 150136 by Niemela, V. S., Gamen, R. C.

“…From radial velocities determined in high signal-to-noise digital spectra, we report the discovery that the brightest component of the binary system HD 150136…”
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A close encounter of the massive kind by Apellaniz, J Maiz, Sana, H, Barba, R H, Le Bouquin, J-B, Gamen, R C

“…We have used (i) Hubble Space Telescope Advanced Camera for Surveys imaging and Space Telescope Imaging Spectrograph spectroscopy, (ii) ground-based Precision…”
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WR 110: A Single Wolf-Rayet Star with Corotating Interaction Regions in its Wind? by Chené, A.-N, Moffat, A. F. J, Cameron, C, Fahed, R, Gamen, R. C, Lefèvre, L, Rowe, J. F, St-louis, N, Muntean, V, Chevrotière, A. De La, Guenther, D. B, Kuschnig, R, Matthews, J. M, Rucinski, S. M, Sasselov, D, Weiss, W. W

“…A 30 day contiguous photometric run with the Microvariability and Oscillations of STars (MOST) satellite on the WN5-6b star WR 110 (HD 165688) reveals a…”
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He II [lambda]4686 IN [eta] CARINAE: COLLAPSE OF THE WIND-WIND COLLISION REGION DURING PERIASTRON PASSAGE by Teodoro, M, DAMINELI, A, Arias, J I, de Araujo, F X, Barba, R H, Corcoran, M F, Fernandes, M Borges, Fernandez-Lajus, E, Fraga, L, GAMEN, R C

“…The periodic spectroscopic events in [eta] Carinae are now well established and occur near the periastron passage of two massive stars in a very eccentric…”
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A study of the effect of rotational mixing on massive stars evolution: surface abundances of Galactic O7-8 giant stars by Martins, F, Simon-Diaz, S, Barba, R. H, Gamen, R. C, Ekstroem, S

“…A&A 599, A30 (2017) Massive star evolution remains only partly constrained. In particular, the exact role of rotation has been questioned by puzzling…”
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VISTA Variables in the Via Lactea (VVV): The public ESO near-IR variability survey of the Milky Way by Minniti, D., Lucas, P.W., Emerson, J.P., Saito, R.K., Hempel, M., Pietrukowicz, P., Ahumada, A.V., Alonso, M.V., Alonso-Garcia, J., Arias, J.I., Bandyopadhyay, R.M., Barbá, R.H., Barbuy, B., Bedin, L.R., Bica, E., Borissova, J., Bronfman, L., Carraro, G., Catelan, M., Clariá, J.J., Cross, N., de Grijs, R., Dékány, I., Drew, J.E., Fariña, C., Feinstein, C., Lajús, E. Fernández, Gamen, R.C., Geisler, D., Gieren, W., Goldman, B., Gonzalez, O.A., Gunthardt, G., Gurovich, S., Hambly, N.C., Irwin, M.J., Ivanov, V.D., Jordán, A., Kerins, E., Kinemuchi, K., Kurtev, R., López-Corredoira, M., Maccarone, T., Masetti, N., Merlo, D., Messineo, M., Mirabel, I.F., Monaco, L., Morelli, L., Padilla, N., Palma, T., Parisi, M.C., Pignata, G., Rejkuba, M., Roman-Lopes, A., Sale, S.E., Schreiber, M.R., Schröder, A.C., Smith, M., Jr, L. Sodré, Soto, M., Tamura, M., Tappert, C., Thompson, M.A., Toledo, I., Zoccali, M., Pietrzynski, G.

“…We describe the public ESO near-IR variability survey (VVV) scanning the Milky Way bulge and an adjacent section of the mid-plane where star formation activity…”
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MONOS: Multiplicity Of Northern O-type Spectroscopic systems. I. Project description and spectral classifications and visual multiplicity of previously known objects by Apellániz, J. Maíz, Páez, E. Trigueros, Negueruela, I, Barbá, R. H, Simón-Díaz, S, Lorenzo, J, Sota, A, Gamen, R. C, Fariña, C, Salas, J, Caballero, J. A, Morrell, N. I, Pellerin, A, Alfaro, E. J, Herrero, A, Arias, J. I, Marco, A

“…A&A 626, A20 (2019) [ABRIDGED] AIMS. MONOS is collecting information and studying O-type spectroscopic binaries with delta > -20 deg. In this 1st paper we…”
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He II λ4686 EMISSION FROM THE MASSIVE BINARY SYSTEM IN η CAR: CONSTRAINTS TO THE ORBITAL ELEMENTS AND THE NATURE OF THE PERIODIC MINIMA by Teodoro, M., Damineli, A., Heathcote, B., Richardson, N. D., Moffat, A. F. J., St-Jean, L., Russell, C., Gull, T. R., Madura, T. I., Pollard, K. R., Walter, F., Coimbra, A., Prates, R., Fernández-Lajús, E., Gamen, R. C., Hickel, G., Henrique, W., Navarete, F., Andrade, T., Jablonski, F., Luckas, P., Locke, M., Powles, J., Bohlsen, T., Chini, R., Corcoran, M. F., Hamaguchi, K., Groh, J. H., Hillier, D. J., Weigelt, G.

“…ABSTRACT Eta Carinae ( η Car) is an extremely massive binary system in which rapid spectrum variations occur near periastron. Most notably, near periastron the…”
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A new spectroscopic analysis of the massive O + O type binary HD 54662 AB by Barbá, R H, Sabín-Sanjulián, C, Arias, J I, Gamen, R C, Morrell, N I, Ferrero, G, Maíz Apellániz, J, Putkuri, C, Simón Díaz, S, Boyajian, T S, Fullerton, A W, McSwain, M V

“…ABSTRACT HD 54662 AB is one of the three O + OB binaries known so far with orbital period longer than 1000 d, offering the opportunity to test scenarios of…”
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A close encounter of the massive kind by Apellániz, J. Maíz, Sana, H, Barbá, R. H, Bouquin, J. -B. Le, Gamen, R. C

“…We have used (a) HST ACS imaging and STIS spectroscopy, (b) ground-based PIONIER/VLT long-baseline interferometry, and (c) ground-based spectroscopy from…”
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The Galactic O-Star Spectroscopic Survey (GOSSS). III. 142 additional O-type systems by Apellániz, J. Maíz, Sota, A, Arias, J. I, Barbá, R. H, Walborn, N. R, Simón-Díaz, S, Negueruela, I, Marco, A, Leão, J. R. S, Herrero, A, Gamen, R. C, Alfaro, E. J

“…This is the third installment of GOSSS, a massive spectroscopic survey of Galactic O stars, based on new homogeneous, high signal-to-noise ratio, R~2500…”
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The little-studied cluster Berkeley 90. I. LS III +46 11: a very massive O3.5 If + O3.5 If binary by Apellániz, J. Maíz, Negueruela, I, Barbá, R. H, Walborn, N. R, Pellerin, A, Simón-Díaz, S, Sota, A, Marco, A, Alonso-Santiago, J, Bermudez, J. Sanchez, Gamen, R. C, Lorenzo, J

“…A&A 579, A108 (2015) Context: It appears that most (if not all) massive stars are born in multiple systems. At the same time, the most massive binaries are…”
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He II λ4686 IN η CARINAE: COLLAPSE OF THE WIND-WIND COLLISION REGION DURING PERIASTRON PASSAGE by Teodoro, M., Damineli, A., Arias, J. I., de Araújo, F. X., Barbá, R. H., Corcoran, M. F., Borges Fernandes, M., Fernández-Lajús, E., Fraga, L., Gamen, R. C., González, J. F., Groh, J. H., Marshall, J. L., McGregor, P. J., Morrell, N., Nicholls, D. C., Parkin, E. R., Pereira, C. B., Phillips, M. M., Solivella, G. R., Steiner, J. E., Stritzinger, M., Thompson, I., Torres, C. A. O., Torres, M. A. P., Zevallos Herencia, M. I.

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He II λ4686 EMISSION FROM THE MASSIVE BINARY SYSTEM IN CAR: CONSTRAINTS TO THE ORBITAL ELEMENTS AND THE NATURE OF THE PERIODIC MINIMA Based in part on observations obtained at the Southern Astrophysical Research (SOAR) telescope, which is a joint project of the Ministério da Ciência, Tecnologia, e Inovação (MCTI) da República Federativa do Brasil, the U.S. National Optical Astronomy Observatory (NOAO), the University of North Carolina at Chapel Hill (UNC), and Michigan State University (MSU). † by Teodoro, M., Damineli, A., Heathcote, B., Richardson, N. D., Moffat, A. F. J., St-Jean, L., Russell, C., Gull, T. R., Madura, T. I., Pollard, K. R., Walter, F., Coimbra, A., Prates, R., Fernández-Lajús, E., Gamen, R. C., Hickel, G., Henrique, W., Navarete, F., Andrade, T., Jablonski, F., Luckas, P., Locke, M., Powles, J., Bohlsen, T., Chini, R., Corcoran, M. F., Hamaguchi, K., Groh, J. H., Hillier, D. J., Weigelt, G.

“…ABSTRACT Eta Carinae ( Car) is an extremely massive binary system in which rapid spectrum variations occur near periastron. Most notably, near periastron the…”
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A Three-Decade Outburst of the LMC Luminous Blue Variable R127 Draws to a Close by Walborn, Nolan R, Stahl, Otmar, Gamen, Roberto C, Szeifert, Thomas, Morrell, Nidia I, Smith, Nathan, Howarth, Ian D, Humphreys, Roberta M, Bond, Howard E, Lennon, Daniel J

“…The paradigmatic luminous blue variable R127 in the Large Magellanic Cloud has been found in the intermediate, peculiar early-B state, and substantially…”
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The Galactic O-Star Spectroscopic Survey. I. Classification System and Bright Northern Stars in the Blue-Violet at R~2500 by Sota, A, Apellániz, J. Maíz, Walborn, N. R, Alfaro, E. J, Barbá, R. H, Morrell, N. I, Gamen, R. C, Arias, J. I

“…We present the first installment of a massive spectroscopic survey of Galactic O stars, based on new, high signal-to-noise ratio, R~2500 digital observations…”
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WR 110: A Single Wolf-Rayet Star With Corotating Interaction Regions In Its Wind? by Chené, A. -N, Moffat, A. F. J, Cameron, C, Fahed, R, Gamen, R. C, Lefèvre, L, Rowe, J. F, St-Louis, N, Muntean, V, De La Chevrotière, A, Guenther, D. B, Kuschnig, R, Matthews, J. M, Rucinski, S. M, Sasselov, D, Weiss, W. W

“…A 30-day contiguous photometric run with the MOST satellite on the WN5-6b star WR 110 (HD 165688) reveals a fundamental periodicity of P = 4.08 +/- 0.55 days…”
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The nearest star of spectral type O3: a component of the multiple system HD 150136 by Niemela, V. S., Gamen, R. C.

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