Zobrazeno 1 - 10
of 160
pro vyhledávání: '"Sion, E."'
The recurrent nova T Pyxidis has erupted six times since 1890, with its last outburst in 2011, and the relatively short recurrence time between classical nova explosions indicates that T Pyx must have a massive white dwarf accreting at a high rate. I
Externí odkaz:
http://arxiv.org/abs/2409.02090
Autor:
Pala, A. F., Gänsicke, B. T., Townsley, D., Boyd, D., Cook, M. J., De Martino, D., Godon, P., Haislip, J. B., Henden, A. A., Hubeny, I., Ivarsen, K. M., Kafka, S., Knigge, C., LaCluyze, A. P., Long, K. S., Marsh, T. R., Monard, B., Moore, J. P., Myers, G., Nelson, P., Nogami, D., Oksanen, A., Pickard, R., Poyner, G., Reichart, D. E., Rodriguez Perez, D., Schreiber, M. R., Shears, J., Sion, E. M., Stubbings, R., Szkody, P., Zorotovic, M.
We present HST spectroscopy for 45 cataclysmic variables (CVs), observed with HST/COS and HST/STIS. For 36 CVs, the white dwarf is recognisable through its broad Ly a absorption profile and we measure the white dwarf effective temperatures (T-eff) by
Externí odkaz:
http://hdl.handle.net/10150/623936
http://arizona.openrepository.com/arizona/handle/10150/623936
http://arizona.openrepository.com/arizona/handle/10150/623936
We have extended our detailed survey of the local white dwarf population from 20 to 25 pc, effectively doubling the sample volume, which now includes 232 stars. In the process, newstars within 20 pc have been added, a more uniform set of distance est
Externí odkaz:
http://hdl.handle.net/10150/621732
http://arizona.openrepository.com/arizona/handle/10150/621732
http://arizona.openrepository.com/arizona/handle/10150/621732
Autor:
Toloza, O., Gänsicke, B. T., Hermes, J. J., Townsley, D. M., Schreiber, M. R., Szkody, P., Pala, A., Beuermann, K., Bildsten, L., Breedt, E., Cook, M., Godon, P., Henden, A. A., Hubeny, I., Knigge, C., Long, K. S., Marsh, T. R., de Martino, D., Mukadam, A. S., Myers, G., Nelson, P., Oksanen, A., Patterson, J., Sion, E. M., Zorotovic, M.
Non-radial pulsations have been identified in a number of accreting white dwarfs in cataclysmic variables. These stars offer insight into the excitation of pulsation modes in atmospheres with mixed compositions of hydrogen, helium, and metals, and th
Externí odkaz:
http://hdl.handle.net/10150/621433
http://arizona.openrepository.com/arizona/handle/10150/621433
http://arizona.openrepository.com/arizona/handle/10150/621433
Autor:
Pala, A. F., Gänsicke, B. T., Belloni, D., Parsons, S. G., Marsh, T. R., Schreiber, M. R., Breedt, E., Knigge, C., Sion, E. M., Szkody, P., Townsley, D., Bildsten, L., Boyd, D., Cook, M. J., De Martino, D., Godon, P., Kafka, S., Kouprianov, V., Long, K. S., Monard, B., Myers, G., Nelson, P., Nogami, D., Oksanen, A., Pickard, R., Poyner, G., Reichart, D. E., Perez, D. Rodriguez, Shears, J., Stubbings, R., Toloza, O.
We report on the masses ($M_\mathrm{WD}$), effective temperatures ($T_\mathrm{eff}$) and secular mean accretion rates ($\langle \dot{M} \rangle$) of 43 cataclysmic variable (CV) white dwarfs, 42 of which were obtained from the combined analysis of th
Externí odkaz:
http://arxiv.org/abs/2111.13706
Autor:
Darnley, M. J., Hounsell, R., Godon, P., Perley, D. A., Henze, M., Kuin, N. P. M., Williams, B. F., Williams, S. C., Bode, M. F., Harman, D. J., Hornoch, K., Link, M., Ness, J. -U., Ribeiro, V. A. R. M., Sion, E. M., Shafter, A. W., Shara, M. M.
The recurrent nova M31N 2008-12a experiences annual eruptions, contains a near-Chandrasekhar mass white dwarf, and has the largest mass accretion rate in any nova system. In this paper, we present Hubble Space Telescope (HST) WFC3/UVIS photometry of
Externí odkaz:
http://arxiv.org/abs/1709.10145
Autor:
Darnley, M. J., Hounsell, R., Godon, P., Perley, D. A., Henze, M., Kuin, N. P. M., Williams, B. F., Williams, S. C., Bode, M. F., Harman, D. J., Hornoch, K., Link, M., Ness, J. -U., Ribeiro, V. A. R. M., Sion, E. M., Shafter, A. W., Shara, M. M.
The 2008 discovery of an eruption of M31N 2008-12a began a journey on which the true nature of this remarkable recurrent nova continues to be revealed. M31N 2008-12a contains a white dwarf close to the Chandrasekhar limit, accreting at a high rate fr
Externí odkaz:
http://arxiv.org/abs/1708.06795
Autor:
Darnley, M. J., Henze, M., Bode, M. F., Hachisu, I., Hernanz, M., Hornoch, K., Hounsell, R., Kato, M., Ness, J. -U., Osborne, J. P., Page, K. L., Ribeiro, V. A. R. M., Rodriguez-Gil, P., Shafter, A. W., Shara, M. M., Steele, I. A., Williams, S. C., Arai, A., Arcavi, I., Barsukova, E. A., Boumis, P., Chen, T., Fabrika, S., Figueira, J., Gao, X., Gehrels, N., Godon, P., Goranskij, V. P., Harman, D. J., Hartmann, D. H., Hosseinzadeh, G., Horst, J. Chuck, Itagaki, K., Jose, J., Kabashima, F., Kaur, A., Kawai, N., Kennea, J. A., Kiyota, S., Kucakova, H., Lau, K. M., Maehara, H., Naito, H., Nakajima, K., Nishiyama, K., O'Brien, T. J., Quimby, R., Sala, G., Sano, Y., Sion, E. M., Valeev, A. F., Watanabe, F., Watanabe, M., Williams, B. F., Xu, Z.
The Andromeda Galaxy recurrent nova M31N 2008-12a had been observed in eruption ten times, including yearly eruptions from 2008-2014. With a measured recurrence period of $P_\mathrm{rec}=351\pm13$ days (we believe the true value to be half of this) a
Externí odkaz:
http://arxiv.org/abs/1607.08082
We have extended our detailed survey of the local white dwarf population from 20 pc to 25 pc, effectively doubling the sample volume, which now includes 232 stars. In the process new stars within 20 pc have been added, a more uniform set of distance
Externí odkaz:
http://arxiv.org/abs/1606.01236
Autor:
Godon, P., Sion, E. M., Starrfield, S., Livio, M., Williams, R. E., Woodward, C. E., Kuin, P., Page, K. L.
With six recorded nova outbursts, the prototypical recurrent nova T Pyxidis is the ideal cataclysmic variable system to assess the net change of the white dwarf mass within a nova cycle. Recent estimates of the mass ejected in the 2011 outburst range
Externí odkaz:
http://arxiv.org/abs/1402.0128