Search Results - "Holdsworth, D. L."

NOVA LIGHT CURVES FROM THE SOLAR MASS EJECTION IMAGER (SMEI). II. THE EXTENDED CATALOG by Hounsell, R., Darnley, M. J., Bode, M. F., Harman, D. J., Surina, F., Starrfield, S., Holdsworth, D. L., Bewsher, D., Hick, P. P., Jackson, B. V., Buffington, A., Clover, J. M., Shafter, A. W.

“…ABSTRACT We present the results from observing nine Galactic novae in eruption with the Solar Mass Ejection Imager (SMEI) between 2004 and 2009. While many of…”
Get full text

SALT HRS Capabilities for Time Resolved Pulsation Analysis: A Test with the roAp Star α Circini by Holdsworth, D. L., Brunsden, E.

“…Spectroscopy is a powerful tool for detecting variability in the rapidly oscillating Ap (roAp) stars. The technique requires short integrations times and high…”
Get full text

HD 12098: a highly distorted dipole mode in an obliquely pulsating roAp star by Kurtz, D W, Saio, H, Holdsworth, D L, Joshi, Santosh, Seetha, S

“…ABSTRACT HD 12098 is a rapidly oscillating Ap star pulsating in the most distorted dipole mode yet observed in this class of star. Using Transiting Exoplanet…”
Get full text

High frequencies in TESS A–F main-sequence stars by Balona, L A, Holdsworth, D L, Cunha, M S

“…Abstract The driving mechanism for high-frequency oscillations in some chemically peculiar Ap stars, the rapidly oscillating Ap stars (roAp stars), is not…”
Get full text

KIC 5950759: a high-amplitude δ Sct star with amplitude and frequency modulation near the terminal age main sequence by Bowman, D M, Hermans, J, Daszyńska-Daszkiewicz, J, Holdsworth, D L, Tkachenko, A, Murphy, S J, Smalley, B, Kurtz, D W

“…ABSTRACT Among the intermediate mass pulsating stars known as δ Sct stars is a subset of high-amplitude and predominantly radial-mode pulsators known as…”
Get full text

Rotation and pulsation in Ap stars: first light results from TESS sectors 1 and 2 by Cunha, M S, Antoci, V, Holdsworth, D L, Kurtz, D W, Balona, L A, Bognár, Zs, Bowman, D M, Guo, Z, Kołaczek-Szymański, P A, Lares-Martiz, M, Paunzen, E, Skarka, M, Smalley, B, Sódor, Á, Kochukhov, O, Pepper, J, Richey-Yowell, T, Ricker, G R, Seager, S, Buzasi, D L, Fox-Machado, L, Hasanzadeh, A, Niemczura, E, Quitral-Manosalva, P, Monteiro, M J P F G, Stateva, I, De Cat, P, García Hernández, A, Ghasemi, H, Handler, G, Hey, D, Matthews, J M, Nemec, J M, Pascual-Granado, J, Safari, H, Suárez, J C, Szabó, R, Tkachenko, A, Weiss, W W

“…Abstract We present the first results from the Transiting Exoplanet Survey Satellite (TESS) on the rotational and pulsational variability of magnetic…”
Get full text

A tidally tilted sectoral dipole pulsation mode in the eclipsing binary TIC 63328020 by Rappaport, S A, Kurtz, D W, Handler, G, Jones, D, Nelson, L A, Saio, H, Fuller, J, Holdsworth, D L, Vanderburg, A, Žák, J, Skarka, M, Aiken, J, Maxted, P F L, Stevens, D J, Feliz, D L, Kahraman Aliçavuş, F

“…ABSTRACT We report the discovery of the third tidally tilted pulsator, TIC 63328020. Observations with the TESS satellite reveal binary eclipses with an…”
Get full text

Pulsation versus metallicism in Am stars as revealed by LAMOST and WASP by Smalley, B, Antoci, V, Holdsworth, D L, Kurtz, D W, Murphy, S J, DeCat, P, Anderson, D R, Catanzaro, G, Cameron, A Collier, Hellier, C, Maxted, P FL, Norton, A J, Pollacco, D, Ripepi, V, West, R G, Wheatley, P J

“…Abstract We present the results of a study of a large sample of A and Am stars with spectral types from LAMOST and light curves from WASP. We find that, unlike…”
Get full text

KIC 4768731: a bright long-period roAp star in the Kepler field by Smalley, B., Niemczura, E., Murphy, S. J., Lehmann, H., Kurtz, D. W., Holdsworth, D. L., Cunha, M. S., Balona, L. A., Briquet, M., Bruntt, H., De Cat, P., Lampens, P., Thygesen, A. O., Uytterhoeven, K.

“…We report the identification of 61.45 d−1 (711.2 μHz) oscillations, with amplitudes of 62.6 μmag, in KIC 4768731 (HD 225914) using Kepler photometry. This…”
Get full text

TESS Cycle 2 observations of roAp stars with 2-min cadence data by Holdsworth, D L, Cunha, M S, Lares-Martiz, M, Kurtz, D W, Antoci, V, Barceló Forteza, S, De Cat, P, Derekas, A, Kayhan, C, Ozuyar, D, Skarka, M, Hey, D R, Shi, F, Bowman, D M, Kobzar, O, Ayala Gómez, A, Bognár, Zs, Buzasi, D L, Ebadi, M, Fox-Machado, L, García Hernández, A, Ghasemi, H, Guzik, J A, Handberg, R, Handler, G, Hasanzadeh, A, Jayaraman, R, Khalack, V, Kochukhov, O, Lovekin, C C, Mikołajczyk, P, Mkrtichian, D, Murphy, S J, Niemczura, E, Olafsson, B G, Pascual-Granado, J, Paunzen, E, Posiłek, N, Ramón-Ballesta, A, Safari, H, Samadi-Ghadim, A, Smalley, B, Sódor, Á, Stateva, I, Suárez, J C, Szabó, R, Wu, T, Ziaali, E, Zong, W, Seager, S

“…ABSTRACT We present the results of a systematic search of the Transiting Exoplanet Survey Satellite (TESS) 2-min cadence data for new rapidly oscillating Ap…”
Get full text

TESS cycle 1 observations of roAp stars with 2-min cadence data by Holdsworth, D L, Cunha, M S, Kurtz, D W, Antoci, V, Hey, D R, Bowman, D M, Kobzar, O, Buzasi, D L, Kochukhov, O, Niemczura, E, Ozuyar, D, Shi, F, Szabó, R, Samadi-Ghadim, A, Bognár, Zs, Fox-Machado, L, Khalack, V, Lares-Martiz, M, Lovekin, C C, Mikołajczyk, P, Mkrtichian, D, Pascual-Granado, J, Paunzen, E, Richey-Yowell, T, Sódor, Á, Sikora, J, Yang, T Z, Brunsden, E, David-Uraz, A, Derekas, A, García Hernández, A, Guzik, J A, Hatamkhani, N, Handberg, R, Lambert, T S, Lampens, P, Murphy, S J, Monier, R, Pollard, K R, Quitral-Manosalva, P, Ramón-Ballesta, A, Smalley, B, Stateva, I, Vanderspek, R

“…ABSTRACT We present the results of a systematic search for new rapidly oscillating Ap (roAp) stars using the 2-min cadence data collected by the Transiting…”
Get full text

Rotational and pulsational variability in the TESS light curve of HD 27463 by Khalack, V, Lovekin, C, Bowman, D M, Kobzar, O, David-Uraz, A, Paunzen, E, Sikora, J, Lenz, P, Kochukhov, O, Holdsworth, D L, Wade, G A

“…ABSTRACT The new photometric data on pulsating Ap star HD 27463 obtained recently with the Transiting Exoplanet Survey Satellite (TESS) are analysed to search…”
Get full text

Study of chemically peculiar stars – I. High-resolution spectroscopy and K2 photometry of Am stars in the region of M44 by Joshi, Santosh, Trust, Otto, Semenko, E, Williams, P E, Lampens, P, De Cat, P, Vermeylen, L, Holdsworth, D L, García, R A, Mathur, S, Santos, A R G, Mkrtichian, D, Goswami, A, Cuntz, M, Yadav, A P, Sarkar, M, Bhatt, B C, Kahraman Aliçavuş, F, Nhlapo, M D, Lund, M N, Goswami, P P, Savanov, I, Jorissen, A, Jurua, E, Avvakumova, E, Dmitrienko, E S, Chakradhari, N K, Das, M K, Chowdhury, S, Abedigamba, O P, Yakunin, I, Letarte, B, Karinkuzhi, D

“…ABSTRACT We present a study based on the high-resolution spectroscopy and K2 space photometry of five chemically peculiar stars in the region of the open…”
Get full text

λ Bootis stars in the SuperWASP survey by Paunzen, E., Skarka, M., Walczak, P., Holdsworth, D. L., Smalley, B., West, R. G., Janík, J.

“…We have analysed around 170 000 individual photometric WASP (Wide Angle Search for Planets) measurements of 15 well-established λ Bootis stars to search for…”
Get full text

SALT HRS Capabilities for Time Resolved Pulsation Analysis: A Test with the roAp Star Circini Based on observations made with the Southern African Large Telescope (SALT) by Holdsworth, D. L., Brunsden, E.

“…Spectroscopy is a powerful tool for detecting variability in the rapidly oscillating Ap (roAp) stars. The technique requires short integrations times and high…”
Get full text

KIC 7582608: a new Kepler roAp star with frequency variability by Holdsworth, D.L., Smalley, B., Kurtz, D.W., Southworth, J., Cunha, M.S., Clubb, K.I.

“…We analyse the fifth roAp star reported in the Kepler field, KIC 7582608, discovered with the SuperWASP project. The object shows a high frequency pulsation at…”
Get full text

Long-period Ap stars discovered with TESS data: The northern ecliptic hemisphere by Mathys, G, Kurtz, D. W, Holdsworth, D. L

“…A&A 660, A70 (2022) The rotation periods of the magnetic Ap stars span five to six orders of magnitude. Period differentiation must have taken place at the…”
Get full text

Fundamental properties of a selected sample of Ap stars: Inferences from interferometric and asteroseismic constraints by Deal, M, Cunha, M. S, Keszthelyi, Z, Perraut, K, Holdsworth, D. L

“…A&A 650, A125 (2021) Magnetic fields influence the formation and evolution of stars and impact the observed stellar properties. Ap stars (magnetic A-type…”
Get full text

A tidally tilted sectoral dipole pulsation mode in the eclipsing binary TIC 63328020 by Rappaport, S. A, Kurtz, D. W, Handler, G, Jones, D, Nelson, L. A, Saio, H, Fuller, J, Holdsworth, D. L, Vanderburg, A, Žák, J, Skarka, M, Aiken, J, Maxted, P. F. L, Stevens, D. J, Feliz, D. L, Aliçavuş, F. Kahraman

“…We report the discovery of the third tidally tilted pulsator, TIC 63328020. Observations with the TESS satellite reveal binary eclipses with an orbital period…”
Get full text

Rotational and pulsational variability in the TESS light curve of HD27463 by Khalack, V, Lovekin, C, Bowman, D. M, Kobzar, O, David-Uraz, A, Paunzen, E, Sikora, J, Lenz, P, Kochukhov, O, Holdsworth, D. L, Wade, G. A

“…The new photometric data on pulsating Ap star HD~27463 obtained recently with the Transiting Exoplanet Survey Satellite (\textit{TESS}) are analysed to search…”
Get full text