Zobrazeno 1 - 10
of 263
pro vyhledávání: '"Raddi, R."'
Autor:
Zhang, Z. H., Raddi, R., Burgasser, A. J., Casewell, S. L., Smart, R. L., Galvez-Ortiz, M. C., Jones, H. R. A., Baig, S., Lodieu, N., Gauza, B., Pavlenko, Ya. V., Jiao, Y. F., Zhao, Z. K., Zhou, S. Y., Pinfield, D. J.
We report the discovery of five white dwarf + ultracool dwarf systems identified as common proper motion wide binaries in the Gaia Catalogue of Nearby Stars. The discoveries include a white dwarf + L subdwarf binary, VVV 1256-62AB, a gravitationally
Externí odkaz:
http://arxiv.org/abs/2407.19219
Autor:
Geier, S., Heber, U., Irrgang, A., Dorsch, M., Bastian, A., Neunteufel, P., Kupfer, T., Bloemen, S., Kreuzer, S., Möller, L., Schindewolf, M., Schneider, D., Ziegerer, E., Pelisoli, I., Schaffenroth, V., Barlow, B. N., Raddi, R., Geier, S. J., Reindl, N., Rauch, T., Nemeth, P., Gänsicke, B. T.
Hot subdwarfs (sdO/B) are the stripped helium cores of red giants formed by binary interactions. Close hot subdwarf binaries with massive white dwarf companions have been proposed as possible progenitors of thermonuclear supernovae type Ia (SN Ia). I
Externí odkaz:
http://arxiv.org/abs/2407.04479
Autor:
Dawson, H., Geier, S., Heber, U., Pelisoli, I., Dorsch, M., Schaffenroth, V., Reindl, N., Culpan, R., Pritzkuleit, M., Vos, J., Soemitro, A. A., Roth, M. M., Schneider, D., Uzundag, M., Vučković, M., Amaral, L. Antunes, Istrate, A. G., Justham, S., Østensen, R. H., Telting, J. H., Djupvik, A. A., Raddi, R., Green, E. M., Jeffery, C. S., Kepler, S. O., Munday, J., Steinmetz, T., Kupfer, T.
We present the first volume-limited sample of spectroscopically confirmed hot subluminous stars out to 500 pc, defined using the accurate parallax measurements from the {\em Gaia} space mission data release 3 (DR3). The sample comprises a total of 39
Externí odkaz:
http://arxiv.org/abs/2403.15513
Autor:
Garbutt, J. A., Parsons, S. G., Toloza, O., Gänsicke, B. T., Hernandez, M. S., Koester, D., Lagos, F., Raddi, R., Rebassa-Mansergas, A., Ren, J. J., Schreiber, M. R., Zorotovic, M.
White dwarfs with a F, G or K type companion represent the last common ancestor for a plethora of exotic systems throughout the galaxy, though to this point very few of them have been fully characterised in terms of orbital period and component masse
Externí odkaz:
http://arxiv.org/abs/2403.07985
Autor:
Rebassa-Mansergas, A., Maldonado, J., Raddi, R., Torres, S., Hoskin, M., Cunningham, T., Hollands, M. A., Ren, J., Gaensicke, B. T., Tremblay, P. -E., Camisassa, M.
Magnetic activity and rotation are related to the age of low-mass main sequence stars. To further constrain these relations, we study a sample of 574 main sequence stars members of common proper motion pairs with white dwarfs, identified thanks to Ga
Externí odkaz:
http://arxiv.org/abs/2310.02125
Autor:
Torres, S., Cruz, P., Murillo-Ojeda, R., Jiménez-Esteban, F. M., Rebassa-Mansergas, A., Solano, E., Camisassa, M. E., Raddi, R., Lourec, J. Doliguez Le
Publikováno v:
A&A 677, A159 (2023)
The characterization of white dwarf atmospheres is crucial for accurately deriving stellar parameters such as effective temperature, mass, and age. We aim to classify the population of white dwarfs up to 500 pc into hydrogen-rich or hydrogen-deficien
Externí odkaz:
http://arxiv.org/abs/2307.13629
Autor:
Parsons, S. G., Hernandez, M. S., Toloza, O., Zorotovic, M., Schreiber, M. R., Gänsicke, B. T., Lagos, F., Raddi, R., Rebassa-Mansergas, A., Ren, J. J., Koester, D.
Virtually all binaries consisting of a white dwarf with a non-degenerate companion can be classified as either close post-interaction systems (with orbital periods of a few days or less), or wide systems (with periods longer than decades), in which b
Externí odkaz:
http://arxiv.org/abs/2211.08440
Autor:
O'Brien, Mairi W., Tremblay, P. -E., Fusillo, N. P. Gentile, Hollands, M. A., Gaensicke, B. T., Koester, D., Pelisoli, I., Cukanovaite, E., Cunningham, T., Doyle, A. E., Elms, A., Farihi, J., Hermes, J. J., Holberg, J., Jordan, S., Klein, B. L., Kleinman, S. J., Manser, C. J., De Martino, D., Marsh, T. R., McCleery, J., Melis, C., Nitta, A., Parsons, S. G., Raddi, R., Rebassa-Mansergas, A., Schreiber, M. R., Silvotti, R., Steeghs, D., Toloza, O., Toonen, S., Torres, S., Weinberger, A. J., Zuckerman, B.
We present a spectroscopic survey of 248 white dwarf candidates within 40 pc of the Sun; of these 244 are in the southern hemisphere. Observations were performed mostly with the Very Large Telescope (X-Shooter) and Southern Astrophysical Research Tel
Externí odkaz:
http://arxiv.org/abs/2210.01608
Autor:
Hernandez, M. S., Schreiber, M. R., Parsons, S. G., Gänsicke, B. T., Toloza, O., Zorotovic, M., Raddi, R., Rebassa-Mansergas, A., Ren, J. J.
The white dwarf binary pathways survey is dedicated to studying the origin and evolution of binaries containing a white dwarf and an intermediate-mass secondary star of the spectral type A, F, G, or K (WD+AFGK). Here we present CPD-65\,264, a new pos
Externí odkaz:
http://arxiv.org/abs/2209.15591
Autor:
Calamida, A., Matheson, T., Olszewski, E. W., Saha, A., Axelrod, Tim, Shanahan, C., Holberg, J., Points, S., Narayan, G., Malanchev, K., Ridden-Harper, R., Gentile-Fusillo, N., Raddi, R., Bohlin, R., Rest, A., Hubeny, I., Deustua, S., Mackenty, . J., Sabbi, E., Stubbs, C. W.
We verified for photometric stability a set of DA white dwarfs with Hubble Space Telescope magnitudes from the near-ultraviolet to the near-infrared and ground-based spectroscopy by using time-spaced observations from the Las Cumbres Observatory netw
Externí odkaz:
http://arxiv.org/abs/2209.09950