Zobrazeno 1 - 10
of 212
pro vyhledávání: '"Kurtz Donald W."'
Autor:
Kurtz, Donald W., Handler, Gerald, Holdsworth, Daniel L., Cunha, Margarida S., Saio, Hideyuki, Medupe, Thebe, Murphy, Simon J., Krüger, Joachim, Brunsden, E., Antoci, Victoria, Hey, Daniel R., Shitrit, Noi, Matthews, Jaymie M.
HD 60435 is a well-known rapidly oscillating (roAp) Ap star with a series of alternating even and odd degree modes, making it a prime asteroseismic target. It is also an oblique pulsator with rotational inclination, $i$, and magnetic/pulsation obliqu
Externí odkaz:
http://arxiv.org/abs/2412.04840
Autor:
Guo, Zhao, Bedding, Timothy R., Pamyatnykh, A. A., Kurtz, Donald W., Li, Gang, Gautam, Anuj, Murphy, Simon J., Aerts, Conny
We find that the observed pressure-mode rotational splittings of slowly/moderately rotating Delta Scuti stars and Beta Cephei stars mostly have a positive asymmetry. That is, the left frequency spacing is larger than the right spacing in the dipole m
Externí odkaz:
http://arxiv.org/abs/2406.15678
Autor:
Henriksen, Andreea I., Antoci, Victoria, Saio, Hideyuki, Cantiello, Matteo, Kjeldsen, Hans, Kurtz, Donald W., Murphy, Simon J., Mathur, Savita, García, Rafael A., Santos, Ângela R. G.
The Kepler mission revealed a plethora of stellar variability in the light curves of many stars, some associated with magnetic activity or stellar oscillations. In this work, we analyse the periodic signal in 162 intermediate-mass stars, interpreted
Externí odkaz:
http://arxiv.org/abs/2301.04974
Publikováno v:
EPJ Web of Conferences, Vol 160, p 03008 (2017)
The results of a search for amplitude modulation of pulsation modes in 983 δ Sct stars, which have effective temperatures between 6400 ⩽ Teff ⩽ 10 000 K in the Kepler Input Catalogue and were continuously observed by the Kepler Space Telescope f
Externí odkaz:
https://doaj.org/article/51703f36e7734aa0ab2ace83824bd805
Autor:
Holdsworth Daniel L., Kurtz Donald W., Smalley Barry, Saio Hideyuki, Handler Gerald, Murphy Simon J., Lehmann Holger
Publikováno v:
EPJ Web of Conferences, Vol 160, p 03004 (2017)
We present an analysis of the first K2 observations of a rapidly oscillating Ap (roAp) star, HD 24355. The star was discovered to be a roAp star by [1], with a frequency of 224.31 d-1 (2596.18 μHz; P = 6.4 min) and an amplitude of 1.51 mmag in Super
Externí odkaz:
https://doaj.org/article/41fb5e04e449404580ffe663d07d2978
Autor:
Jayaraman, Rahul, Handler, Gerald, Rappaport, Saul, Fuller, Jim, Kurtz, Donald W., Charpinet, Stéphane, Ricker, George
Tidally tilted pulsators (TTPs) are an intriguing new class of oscillating stars in binary systems; in such stars, the pulsation axis coincides with the line of apsides, or semi-major axis, of the binary. All three TTPs discovered so far have been $\
Externí odkaz:
http://arxiv.org/abs/2203.04970
Autor:
Saio, Hideyuki, Kurtz, Donald W.
R-mode oscillations in a rotating star produce characteristic signatures in a Fourier amplitude spectrum at frequencies related with the rotation frequency, which can be, in turn, used to obtain the surface rotation rate of the star. Some binary star
Externí odkaz:
http://arxiv.org/abs/2201.02458
The tidally tilted pulsators are a new type of oscillating star in close binary systems that have their pulsation axis in the orbital plane because of the tidal distortion caused by their companion. We describe this group of stars on the basis of the
Externí odkaz:
http://arxiv.org/abs/2201.01722
Autor:
Jayaraman, Rahul, Hubrig, Swetlana, Holdsworth, Daniel L., Schöller, Markus, Järvinen, Silva, Kurtz, Donald W., Ricker, George R.
We report the detection and characterization of a new magnetospheric star, HD 135348, based on photometric and spectropolarimetric observations. The TESS light curve of this star exhibited variations consistent with stars known to possess rigidly rot
Externí odkaz:
http://arxiv.org/abs/2112.07676
Autor:
Jayaraman, Rahul, Rappaport, Saul, Nelson, Lorne, Kurtz, Donald W., Dufresne, George, Handler, Gerald, Senhadji, Abdel, Latham, David W., Zhou, George, Bieryla, Allyson, Ricker, George
Using TESS 20-sec cadence data, we have discovered an unusual combination of pulsating stars in what we infer to be a binary system. The binary consists of a standard $\delta$ Scuti star with pulsations over the range 32-41 d$^{-1}$; this is in a lik
Externí odkaz:
http://arxiv.org/abs/2111.12098