Zobrazeno 41 - 50
of 661
pro vyhledávání: '"Raddi, P."'
Autor:
Hernandez, M. S., Schreiber, M. R., Parsons, S. G., Gansicke, B. T., Lagos, F., Raddi, R., Toloza, O., Tovmassian, G., Zorotovic, M., Irawati, P., Pasten, E., Rebassa-Mansergas, A., Ren, J. J., Rittipruk, P., Tappert, C.
Constraints from surveys of post common envelope binaries (PCEBs) consisting of a white dwarf plus an M-dwarf companion have led to significant progress in our understanding of the formation of close white dwarf binary stars with low-mass companions.
Externí odkaz:
http://arxiv.org/abs/2012.04683
Publikováno v:
A&A 645, A108 (2021)
Motivated by the historical identification of runaway main-sequence (MS) stars of early spectral type at high Galactic latitudes, we test the capability of Gaia at identifying new such stars. We have selected ~2300 sources with Gaia magnitudes of GBP
Externí odkaz:
http://arxiv.org/abs/2011.08862
Autor:
Ren, J. -J., Raddi, R., Rebassa-Mansergas, A., Hernandez, M. S., Parsons, S. G., Irawati, P., Rittipruk, P., Schreiber, M. R., Gansicke, B. T., Torres, S., Wang, H. -J., Zhang, J. -B., Zhao, Y., Zhou, Y. -T., Han, Z. -W., Wang, B., Liu, C., Liu, X. -W., Wang, Y., Zheng, J., Wang, J. -F., Zhao, F., Cui, K. -M., Shi, J. -R., Tian, H.
Close white dwarf binaries consisting of a white dwarf and an A, F, G or K type main sequence star, henceforth close WD+AFGK binaries, are ideal systems to understand the nature of type Ia supernovae progenitors and to test binary evolution models. I
Externí odkaz:
http://arxiv.org/abs/2010.02885
Autor:
Hoskin, Matthew J., Toloza, Odette, Gänsicke, Boris T., Raddi, Roberto, Koester, Detlev, Pala, Anna, Manser, Christopher J., Farihi, Jay, Belmonte, Maria Teresa, Hollands, Mark, Fusillo, Nicola Gentile, Swan, Andrew
WD J204713.76-125908.9 is a new addition to the small class of white dwarfs with helium-dominated photospheres that exhibit strong Balmer absorption lines and atmospheric metal pollution. The exceptional abundances of hydrogen observed in these stars
Externí odkaz:
http://arxiv.org/abs/2009.05053
Autor:
Camisassa, María E., Althaus, Leandro G., Torres, Santiago, Córsico, Alejandro H., Rebassa-Mansergas, Alberto, Tremblay, Pier-Emmanuel, Cheng, Sihao, Raddi, Roberto
Publikováno v:
A&A 649, L7 (2021)
White dwarf stars are the most common end point of stellar evolution. Of special interest are the ultramassive white dwarfs, as they are related to type Ia Supernovae explosions, merger events, and Fast Radio Bursts. Ultramassive white dwarfs are exp
Externí odkaz:
http://arxiv.org/abs/2008.03028
The white dwarf SDSS J124043.01+671034.68 (SDSS J1240+6710) was previously found to have an oxygen-dominated atmosphere with significant traces of neon, magnesium, and silicon. A possible origin via a violent late thermal pulse or binary interactions
Externí odkaz:
http://arxiv.org/abs/2006.07381
Autor:
Sahoo, S. K., Baran, A. S., Heber, U., Ostrowski, J., Sanjayan, S., Silvotti, R., Irrgang, A., Uzundag, M., Reed, M. D., Shoaf, K. A., Raddi, R., Vuckovic, M., Ghasemi, H., Zong, W., Bell, K. J.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 495, Issue 3, July 2020, Pages 2844-2857
We report on the detection of pulsations of three pulsating subdwarf B stars observed by the TESS satellite and our results of mode identification in these stars based on an asymptotic period relation. SB 459 (TIC 067584818), SB 815 (TIC 169285097) a
Externí odkaz:
http://arxiv.org/abs/2006.04126
Autor:
Tremblay, P. -E., Hollands, M. A., Fusillo, N. P. Gentile, McCleery, J., Izquierdo, P., Gänsicke, B. T., Cukanovaite, E., Koester, D., Brown, W. R., Charpinet, S., Cunningham, T., Farihi, J., Giammichele, N., van Grootel, V., Hermes, J. J., Hoskin, M. J., Jordan, S., Kepler, S. O., Kleinman, S. J., Manser, C. J., Marsh, T. R., de Martino, D., Nitta, A., Parsons, S. G., Pelisoli, I., Raddi, R., Rebassa-Mansergas, A., Ren, J. -J., Schreiber, M. R., Silvotti, R., Toloza, O., Toonen, S., Torres, S.
We present a spectroscopic survey of 230 white dwarf candidates within 40 pc of the Sun from the William Herschel Telescope and Gran Telescopio Canarias. All candidates were selected from $\textit{Gaia}$ Data Release 2 (DR2) and in almost all cases h
Externí odkaz:
http://arxiv.org/abs/2006.00965
Autor:
Bognár, Zs., Kawaler, S. D., Bell, K. J., Schrandt, C., Baran, A. S., Bradley, P. A., Hermes, J. J., Charpinet, S., Handler, G., Mullally, S. E., Murphy, S. J., Raddi, R., Sódor, Á., Tremblay, P. -E., Uzundag, M., Zong, W.
Publikováno v:
A&A 638, A82 (2020)
Context. We present our findings on 18 formerly known ZZ Ceti stars observed by the TESS space telescope in 120s cadence mode during the survey observation of the southern ecliptic hemisphere. Aims. We focus on the frequency analysis of the space-bas
Externí odkaz:
http://arxiv.org/abs/2003.11481
Autor:
Monguió, M., Greimel, R., Drew, J. E., Barentsen, G., Groot, P. J., Irwin, M. J., Casares, J., Gänsicke, B. T., Carter, P. J., Corral-Santana, J. M., Gentile-Fusillo, N. P., Greiss, S., van Haaften, L. M., Hollands, M., Jones, D., Kupfer, T., Manser, C. J., Murphy, D. N. A., McLeod, A. F., Oosting, T., Parker, Q. A., Pyrzas, S., Rodríguez-Gil, P., van Roestel, J., Scaringi, S., Schellart, P., Toloza, O., Vaduvescu, O., van Spaandonk, L., Verbeek, K., Wright, N. J., Eislöffel, J., Fabregat, J., Harris, A., Morris, R. A. H., Phillipps, S., Raddi, R., Sabin, L., Unruh, Y., Vink, J. S, Wesson, R., Cardwell, A., Cochrane, R. K., Doostmohammadi, S., Mocnik, T., Stoev, H., Suárez-Andrés, L., Tudor, V., Wilson, T. G., Zegmott, T. J.
Publikováno v:
A&A 638, A18 (2020)
The INT Galactic Plane Survey (IGAPS) is the merger of the optical photometric surveys, IPHAS and UVEX, based on data from the Isaac Newton Telescope (INT) obtained between 2003 and 2018. Here, we present the IGAPS point source catalogue. It contains
Externí odkaz:
http://arxiv.org/abs/2002.05157