Zobrazeno 1 - 10
of 78
pro vyhledávání: '"Giammichele, N."'
Autor:
Charpinet, S., Giammichele, N., Brassard, P., Fontaine, G., Bergeron, P., Zong, W., Van Grootel, V., Baran, A. S.
DA-type white dwarfs account for 80% of all white dwarfs and represent, for most of them, the ultimate outcome of the typical evolution of low-to-intermediate mass stars. Their internal chemical stratification is strongly marked by passed, often unce
Externí odkaz:
http://arxiv.org/abs/2107.03797
Autor:
Giammichele, N., Charpinet, S., Fontaine, G., Brassard, P., Bergeron, P., Reindl, N., Baran, A. S.
We present the results of the asteroseismic analysis of the hydrogen-deficient white dwarf PG 0112+104 from the $Kepler$-2 field. Our seismic procedure using the forward method based on physically sound, static models, includes the new core parameter
Externí odkaz:
http://arxiv.org/abs/2106.15701
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:
Charpinet, S., Brassard, P., Fontaine, G., Van Grootel, V., Zong, W., Giammichele, N., Heber, U., Bognár, Zs., Geier, S., Green, E. M., Hermes, J. J., Kilkenny, D., Østensen, R. H., Pelisoli, I., Silvotti, R., Telting, J. H., Vučković, M., Worters, H. L., Baran, A. S., Bell, K. J., Bradley, P. A., Debes, J. H., Kawaler, S. D., Kołaczek-Szymański, P., Murphy, S. J., Pigulski, A., Sódor, À., Uzundag, M., Handberg, R., Kjeldsen, H., Ricker, G. R., Vanderspek, R. K.
Publikováno v:
A&A 632, A90 (2019)
We present the discovery and asteroseismic analysis of a new g-mode hot B subdwarf (sdB) pulsator, EC 21494-7018 (TIC 278659026), monitored in TESS first sector using 120-second cadence. The light curve analysis reveals that EC 21494-7018 is a sdB pu
Externí odkaz:
http://arxiv.org/abs/1910.04234
Publikováno v:
A&A 598, A109 (2017)
Context. The details of the C/O core structure in white dwarf stars has mostly remained inaccessible to the technique of asteroseismology, despite several attempts carried out in the past. Aims. We re-assess the potential of asteroseismology for prob
Externí odkaz:
http://arxiv.org/abs/1611.05071
We present a prescription for parametrizing the chemical profile in the core of white dwarfs in the light of the recent discovery that pulsation modes may sometimes be deeply confined in some cool pulsating white dwarfs. Such modes may be used as uni
Externí odkaz:
http://arxiv.org/abs/1610.06036
Publikováno v:
A&A 585, A22 (2016)
Aims. We use the Kepler data accumulated on the pulsating DB white dwarf KIC 08626021 to explore in detail the stability of its oscillation modes, searching in particular for evidences of nonlinear behaviors. Methods. We analyse nearly two years of u
Externí odkaz:
http://arxiv.org/abs/1510.06884
Autor:
Moehler, S., Modigliani, A., Freudling, W., Giammichele, N., Gianninas, A., Gonneau, A., Kausch, W., Lancon, A., Noll, S., Rauch, T., Vinther, J.
While the near-infrared wavelength regime is becoming more and more important for astrophysics there is a marked lack of spectrophotometric standard star data that would allow the flux calibration of such data. Furthermore, flux calibrating medium- t
Externí odkaz:
http://arxiv.org/abs/1408.1797
Publikováno v:
EPJ Web of Conferences, Vol 152, p 05005 (2017)
Using the forward modeling approach and a new parameterization for the core chemical stratification in ZZ Ceti stars, we test several situations typical of the usually limited constraints available, such as small numbers of observed independent modes
Externí odkaz:
https://doaj.org/article/7874bfcb681c4db08725ce9156e37bea
Autor:
Tremblay, P.-E., Hollands, M.A., Fusillo, N.P.G., 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 Gaia Data Release 2 (DR2) and in almost all cases had no prior
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=core_ac_uk__::dbef216cbb48e5232a15e7823a02ffa7