Search Results - "Worters, H. L"

Period variability in the pulsating Extreme Helium stars V652 Her and BX Cir by Kilkenny, D, Worters, H L, Baran, A S

“…ABSTRACT Eighteen new timings of maxima of the radially pulsating Extreme Helium star, V652 Her, obtained during 2010–2023 are reported, together with 26 new…”
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Resumption of mass accretion in RS Oph by Worters, H. L., Eyres, S. P. S., Bromage, G. E., Osborne, J. P.

“…The latest outburst of the recurrent nova RS Oph occurred in 2006 February. Photometric data presented here show evidence of the resumption of optical…”
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The helium abundance in the ejecta of U Scorpii by Maxwell, M. P., Rushton, M. T., Darnley, M. J., Worters, H. L., Bode, M. F., Evans, A., Eyres, S. P. S., Kouwenhoven, M. B. N., Walter, F. M., Hassall, B. J. M.

“…U Scorpii (U Sco) is a recurrent nova which has been observed in outburst on 10 occasions, most recently in 2010. We present near-infrared (near-IR) and…”
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The discovery of rapid oscillations in the magnetic Ap stars HD69013 and HD96237 by Elkin, V. G, Kurtz, D. W, Worters, H. L, Mathys, G, Smalley, B, van Wyk, F, Smith, A. M. S

“…We report the detection of short-period variations in the stars HD69013 and HD96237. These stars possess large overabundances of rare earth elements and global…”
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A search for variable subdwarf B stars in TESS Full Frame Images III. An update on variable targets in both ecliptic hemispheres – contamination analysis and new sdB pulsators by Sahoo, S K, Baran, A S, Worters, H L, Németh, P, Kilkenny, D

“…ABSTRACT We present an update on the variable star survey performed on the TESS 30 min Full Frame Image (FFI) data reported by our first two papers in this…”
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New hot subdwarf variables from the EC survey by Kilkenny, D, Worters, H L, Lynas-Gray, A E

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Radio and optical observations of the possible AE Aqr twin, LAMOST J024048.51+195226.9 by Pretorius, M L, Hewitt, D M, Woudt, P A, Fender, R P, Heywood, I, Knigge, C, Miller-Jones, J C A, Buckley, D A H, Worters, H L, Potter, S B, Williams, D R A

“…ABSTRACT It was recently proposed that the cataclysmic variable (CV) LAMOST J024048.51+195226.9 may be a twin to the unique magnetic propeller system AE Aqr…”
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The Edinburgh-Cape Blue Object Survey – IV. Zone 3: Galactic latitudes −40° > b > −50 by Kilkenny, D., O'Donoghue, D., Worters, H. L., Koen, C., Hambly, N., MacGillivray, H.

“…Results for Zone 3 of the Edinburgh-Cape (EC) Blue Object survey are presented. This zone covers that part of the South Galactic Cap between 40° and 50° from…”
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The discovery of rapid oscillations in the magnetic Ap stars HD 69013 and HD 96237 by Elkin, V. G., Kurtz, D. W., Worters, H. L., Mathys, G., Smalley, B., van Wyk, F., Smith, A. M. S.

“…We report the detection of short-period variations in the stars HD 69013 and HD 96237. These stars possess large overabundances of rare earth elements and…”
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Sakurai's Object: characterizing the near-infrared CO ejecta between 2003 and 2007 by Worters, H. L., Rushton, M. T., Eyres, S. P. S., Geballe, T. R., Evans, A.

“…We present observations of Sakurai's Object obtained at 1–5 μm between 2003 and 2007. By fitting a radiative transfer model to an echelle spectrum of CO…”
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Characterizing and Commissioning the Sutherland High-Speed Optical Cameras (SHOC) by Coppejans, R., Gulbis, A. A. S., Kotze, M. M., Coppejans, D. L., Worters, H. L., Woudt, P. A., Whittal, H., Cloete, J., Fourie, P.

“…ABSTRACT Two identical new instruments, the Sutherland High-speed Optical Cameras (SHOC), have been developed for use on the South African Astronomical…”
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The Edinburgh-Cape Blue Object Survey – V. The end: Partial Zones 4–6; Galactic latitudes −50° > b > −90 by Kilkenny, D., Worters, H. L., O'Donoghue, D., Koen, C., Koen, T., Hambly, N., MacGillivray, H., Stobie, R. S.

“…Results for the remaining zones of the Edinburgh-Cape (EC) Blue Object survey are presented. These are incomplete, but lie in that part of the South Galactic…”
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Optical spectroscopic and photometric classification of the X-ray transient EP240309a (EP J115415.8−501810) as an intermediate polar by Potter, Stephen B, Buckley, David A H, Scaringi, S, Monageng, I M, Egbo, Okwudili D, Charles, Philip A, Erasmus, N, van Gend, Carel, Loubser, Egan, Titus, Keegan, Rosie, Kathryn, Gajjar, Hitesh, Worters, H L, Chandra, Sunil, Julie, R P M, Hlakola, Moloko

“…ABSTRACT We report on optical follow-up observations of an X-ray source initially detected by the Einstein Probe mission. Our investigations categorize the…”
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High-speed photometry of faint cataclysmic variables – IX. Targets from multiple transient surveys by Paterson, K, Woudt, P A, Warner, B, Breytenbach, H, Gilligan, C K, Motsoaledi, M, Thorstensen, J R, Worters, H L

“…Abstract We present high-speed photometric observations of 25 cataclysmic variables detected by the All Sky Automated Search for Super-Novae, the Mobile…”
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The ephemeris of the pulsating Helium star BX Cir by Kilkenny, D., Worters, H. L.

“…Twenty-eight new timings of maxima of the radially pulsating extreme helium (EHe) star BX Cir (=LSS3184) obtained during 2005-2013 are reported. These results…”
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Fast Hα emission line variability in RS Ophiuchi by Worters, H. L., Rushton, M. T.

“…We present optical spectroscopy of the recurrent nova RS Ophiuchi with time resolutions of ∼6, ∼5 and ∼2 min. In contrast to previous high time resolution…”
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The OmegaWhite survey for short-period variable stars – III: follow-up photometric and spectroscopic observations by Macfarlane, S A, Woudt, P A, Groot, P J, Ramsay, G, Toma, R, Motsoaledi, M, Crause, L A, Gilbank, D G, O'Donoghue, D, Potter, S B, Sickafoose, A A, van Gend, C, Worters, H L

“…We present photometric and spectroscopic follow-up observations of short-period variables discovered in the OmegaWhite survey, a wide-field high-cadence g-band…”
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Warm high-velocity CO in the wind of Sakurai's Object (= V4334 Sgr) by Eyres, S. P. S., Geballe, T. R., Tyne, V. H., Evans, A., Smalley, B., Worters, H. L.

“…ABSTRACT We present UKIRT UIST spectra of Sakurai's Object (= V4334 Sgr) showing CO fundamental‐band absorption features around 4.7 μm. The line centres are at…”
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Near-infrared studies of the 2010 outburst of the recurrent nova U Scorpii by Banerjee, D. P. K., Das, R. K., Ashok, N. M., Rushton, M. T., Eyres, S. P. S., Maxwell, M. P., Worters, H. L., Evans, A., Schaefer, B. E.

“…We present near-infrared (near-IR) observations of the 2010 outburst of U Sco. JHK photometry is presented on 10 consecutive days starting from 0.59 d after…”
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A search for variable subdwarf B stars in TESS Full Frame Images III. An update on variable targets in both ecliptic hemispheres -- contamination analysis and new sdB pulsators by Sahoo, S. K, Baran, A. S, Worters, H. L, Németh, P, Kilkenny, D

“…Monthly Notices of the Royal Astronomical Society, Volume 519, Issue 2, February 2023, Pages 2486-2499 We present an update on the variable star survey…”
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