All Outputs (264)

ENIGMATIC RECURRENT PULSATIONAL VARIABILITY OF THE ACCRETING WHITE DWARF EQ LYN (SDSS J074531.92+453829.6) (2013)
Journal Article
Mukadam, A. S., Townsley, D. M., Szkody, P., Gänsicke, B. T., Southworth, J., Brockett, T., …Qian, S. (2013). ENIGMATIC RECURRENT PULSATIONAL VARIABILITY OF THE ACCRETING WHITE DWARF EQ LYN (SDSS J074531.92+453829.6). Astronomical Journal, 146(3), Article 54. https://doi.org/10.1088/0004-6256/146/3/54

Photometric observations of the cataclysmic variable EQ Lyn (SDSS J074531.92+453829.6), acquired from 2005 October to 2006 January, revealed high-amplitude variability in the range 1166–1290 s. This accreting white dwarf underwent an outburst in 2006... Read More about ENIGMATIC RECURRENT PULSATIONAL VARIABILITY OF THE ACCRETING WHITE DWARF EQ LYN (SDSS J074531.92+453829.6).

KIC 11285625: A double-lined spectroscopic binary with a γ Doradus pulsator discovered from Kepler space photometry (2013)
Journal Article
Debosscher, J., Aerts, C., Tkachenko, A., Pavlovski, K., Maceroni, C., Kurtz, D., …Southworth, J. (2013). KIC 11285625: A double-lined spectroscopic binary with a γ Doradus pulsator discovered from Kepler space photometry. Astronomy & Astrophysics, 556, Article A56. https://doi.org/10.1051/0004-6361/201321702

Aims. We present the first binary modelling results for the pulsating, eclipsing binary KIC 11285625 that was discovered by the Kepler mission. An automated method to disentangle the pulsation spectrum and the orbital variability in high quality ligh... Read More about KIC 11285625: A double-lined spectroscopic binary with a γ Doradus pulsator discovered from Kepler space photometry.

KIC 4544587: an eccentric, short-period binary system with δ Sct pulsations and tidally excited modes (2013)
Journal Article
Hambleton, K. M., Kurtz, D. W., Prša, A., Guzik, J. A., Pavlovski, K., Bloemen, S., …Fuller, J. (2013). KIC 4544587: an eccentric, short-period binary system with δ Sct pulsations and tidally excited modes. Monthly Notices of the Royal Astronomical Society, 434(2), 925-940. https://doi.org/10.1093/mnras/stt886

We present Kepler photometry and ground-based spectroscopy of KIC 4544587, a short-period eccentric eclipsing binary system with self-excited pressure and gravity modes, tidally excited modes, tidally influenced p modes and rapid apsidal motion of 18... Read More about KIC 4544587: an eccentric, short-period binary system with δ Sct pulsations and tidally excited modes.

A detailed census of variable stars in the globular cluster NGC 6333 (M9) from CCD differential photometry★ (2013)
Journal Article
Arellano Ferro, A., Bramich, D. M., Figuera Jaimes, R., Giridhar, S., Kains, N., Kuppuswamy, K., …Wertz, O. (2013). A detailed census of variable stars in the globular cluster NGC 6333 (M9) from CCD differential photometry★. Monthly Notices of the Royal Astronomical Society, 434(2), 1220-1238. https://doi.org/10.1093/mnras/stt1080

We report CCD V and I time series photometry of the globular cluster NGC 6333 (M9). The technique of difference image analysis has been used, which enables photometric precision better than 0.05 mag for stars brighter than V ∼ 19.0 mag, even in the c... Read More about A detailed census of variable stars in the globular cluster NGC 6333 (M9) from CCD differential photometry★.

High-precision photometry by telescope defocusing – V. WASP-15 and WASP-16★ (2013)
Journal Article
Southworth, J., Mancini, L., Browne, P., Burgdorf, M., Calchi Novati, S., Dominik, M., …Wertz, O. (2013). High-precision photometry by telescope defocusing – V. WASP-15 and WASP-16★. Monthly Notices of the Royal Astronomical Society, 434(2), 1300-1308. https://doi.org/10.1093/mnras/stt1089

We present new photometric observations of WASP-15 and WASP-16, two transiting extrasolar planetary systems with measured orbital obliquities but without photometric follow-up since their discovery papers. Our new data for WASP-15 comprise observatio... Read More about High-precision photometry by telescope defocusing – V. WASP-15 and WASP-16★.

Transmission photometry of WASP-12b: simultaneous measurement of the planetary radius in three bands (2013)
Journal Article
Copperwheat, C. M., Wheatley, P. J., Southworth, J., Bento, J., Marsh, T. R., Dhillon, V. S., …Hickman, R. (2013). Transmission photometry of WASP-12b: simultaneous measurement of the planetary radius in three bands. Monthly Notices of the Royal Astronomical Society, 434(1), 661-670. https://doi.org/10.1093/mnras/stt1056

Transmission spectroscopy has been successfully used from both the ground and in space to characterize the atmospheres of transiting exoplanets. This technique is challenging from the ground because ground-based spectrographs tend not to be designed... Read More about Transmission photometry of WASP-12b: simultaneous measurement of the planetary radius in three bands.

Estimating the parameters of globular cluster M 30 (NGC 7099) from time-series photometry (2013)
Journal Article
Kains, N., Bramich, D. M., Arellano Ferro, A., Figuera Jaimes, R., Jørgensen, U. G., Giridhar, S., …(The MiNDSTEp consortium). (2013). Estimating the parameters of globular cluster M 30 (NGC 7099) from time-series photometry. Astronomy & Astrophysics, 555, Article A36. https://doi.org/10.1051/0004-6361/201321819

Aims. We present the analysis of 26 nights of V and I time-series observations from 2011 and 2012 of the globular cluster M 30 (NGC 7099). We used our data to search for variable stars in this cluster and refine the periods of known variables; we the... Read More about Estimating the parameters of globular cluster M 30 (NGC 7099) from time-series photometry.

The GAPS programme with HARPS-N at TNG: I. Observations of the Rossiter-McLaughlin effect and characterisation of the transiting system Qatar-1⋆⋆⋆⋆⋆ (2013)
Journal Article
Covino, E., Esposito, M., Barbieri, M., Mancini, L., Nascimbeni, V., Claudi, R., …Turrini, D. (2013). The GAPS programme with HARPS-N at TNG: I. Observations of the Rossiter-McLaughlin effect and characterisation of the transiting system Qatar-1⋆⋆⋆⋆⋆. Astronomy & Astrophysics, 554, Article A28. https://doi.org/10.1051/0004-6361/201321298

Context. Our understanding of the formation and evolution of planetary systems is still fragmentary because most of the current data provide limited information about the orbital structure and dynamics of these systems. The knowledge of the orbital p... Read More about The GAPS programme with HARPS-N at TNG: I. Observations of the Rossiter-McLaughlin effect and characterisation of the transiting system Qatar-1⋆⋆⋆⋆⋆.

The GAPS programme with HARPS-N at TNG: II. No giant planets around the metal-poor star HIP 11952⋆⋆⋆ (2013)
Journal Article
Desidera, S., Sozzetti, A., Bonomo, A. S., Gratton, R., Poretti, E., Claudi, R., …Southworth, J. (2013). The GAPS programme with HARPS-N at TNG: II. No giant planets around the metal-poor star HIP 11952⋆⋆⋆. Astronomy & Astrophysics, 554, Article A29. https://doi.org/10.1051/0004-6361/201321155

In the context of the programme Global Architecture of Planetary Systems (GAPS), we have performed radial velocity monitoring of the metal-poor star HIP 11952 on 35 nights during about 150 days using the newly installed high-resolution spectrograph H... Read More about The GAPS programme with HARPS-N at TNG: II. No giant planets around the metal-poor star HIP 11952⋆⋆⋆.

Two new SB2 binaries with main sequence B-type pulsators in theKeplerfield (2013)
Journal Article
Pápics, P. I., Tkachenko, A., Aerts, C., Briquet, M., Marcos-Arenal, P., Beck, P. G., …Debosscher, J. (2013). Two new SB2 binaries with main sequence B-type pulsators in theKeplerfield. Astronomy & Astrophysics, 553, A127. https://doi.org/10.1051/0004-6361/201321088

Context. OB stars are important in the chemistry and evolution of the Universe, but the sample of targets that is well understood from an asteroseismological point of view is still too limited to provide feedback on the current evolutionary models.... Read More about Two new SB2 binaries with main sequence B-type pulsators in theKeplerfield.

EMCCD photometry reveals two new variable stars in the crowded central region of the globular cluster NGC 6981 (2013)
Journal Article
Skottfelt, J., Bramich, D. M., Figuera Jaimes, R., Jørgensen, U. G., Kains, N., W Harpsøe, K. B., …Williams, A. (2013). EMCCD photometry reveals two new variable stars in the crowded central region of the globular cluster NGC 6981. Astronomy & Astrophysics, 553, Article A111. https://doi.org/10.1051/0004-6361/201321430

Two previously unknown variable stars in the crowded central region of the globular cluster NGC 6981 are presented. The observations were made using the electron multiplying CCD (EMCCD) camera at the Danish 1.54 m Telescope at La Silla, Chile. The tw... Read More about EMCCD photometry reveals two new variable stars in the crowded central region of the globular cluster NGC 6981.

Asteroseismology of KIC 11754974: a high-amplitude SX Phe pulsator in a 343-d binary system (2013)
Journal Article
Murphy, S. J., Pigulski, A., Kurtz, D. W., Suárez, J. C., Handler, G., Balona, L. A., …Southworth, J. (2013). Asteroseismology of KIC 11754974: a high-amplitude SX Phe pulsator in a 343-d binary system. Monthly Notices of the Royal Astronomical Society, 432(3), 2284-2297. https://doi.org/10.1093/mnras/stt587

The candidate SX Phe star KIC 11754974 shows a remarkably high number of combination frequencies in the Fourier amplitude spectrum: 123 of the 166 frequencies in our multifrequency fit are linear combinations of independent modes. Predictable pattern... Read More about Asteroseismology of KIC 11754974: a high-amplitude SX Phe pulsator in a 343-d binary system.

MOA-2010-BLG-311: A PLANETARY CANDIDATE BELOW THE THRESHOLD OF RELIABLE DETECTION (2013)
Journal Article
Yee, J. C., Hung, L., Bond, I. A., Allen, W., Monard, L. A. G., Albrow, M. D., …Consortium, T. M. (in press). MOA-2010-BLG-311: A PLANETARY CANDIDATE BELOW THE THRESHOLD OF RELIABLE DETECTION. Astrophysical Journal, 769(1), Article 77. https://doi.org/10.1088/0004-637x/769/1/77

We analyze MOA-2010-BLG-311, a high magnification (Amax > 600) microlensing event with complete data coverage over the peak, making it very sensitive to planetary signals. We fit this event with both a point lens and a two-body lens model and find th... Read More about MOA-2010-BLG-311: A PLANETARY CANDIDATE BELOW THE THRESHOLD OF RELIABLE DETECTION.

Refined physical properties andg′,r′,i′,z′,J, H, Ktransmission spectrum of WASP-23b from the ground (2013)
Journal Article
Nikolov, N., Chen, G., Fortney, J. J., Mancini, L., Southworth, J., van Boekel, R., & Henning, T. (2013). Refined physical properties andg′,r′,i′,z′,J, H, Ktransmission spectrum of WASP-23b from the ground. Astronomy & Astrophysics, 553, Article A26. https://doi.org/10.1051/0004-6361/201321084

Context. Multi-band observations of planetary transits using the telescope defocus technique may yield high-quality light curves suitable for refining the physical properties of exoplanets even with small or medium size telescopes. Such observations... Read More about Refined physical properties andg′,r′,i′,z′,J, H, Ktransmission spectrum of WASP-23b from the ground.

MICROLENSING DISCOVERY OF A POPULATION OF VERY TIGHT, VERY LOW MASS BINARY BROWN DWARFS (2013)
Journal Article
Choi, J., Han, C., Udalski, A., Sumi, T., Gaudi, B. S., Gould, A., …The RoboNet Collaboration. (in press). MICROLENSING DISCOVERY OF A POPULATION OF VERY TIGHT, VERY LOW MASS BINARY BROWN DWARFS. Astrophysical Journal, 768(2), Article 129. https://doi.org/10.1088/0004-637x/768/2/129

Although many models have been proposed, the physical mechanisms responsible for the formation of low-mass brown dwarfs (BDs) are poorly understood. The multiplicity properties and minimum mass of the BD mass function provide critical empirical diagn... Read More about MICROLENSING DISCOVERY OF A POPULATION OF VERY TIGHT, VERY LOW MASS BINARY BROWN DWARFS.

Warm Spitzer Occultation Photometry of WASP-26b at 3.6{\mu}m and 4.5{\mu}m (2013)
Journal Article
Mahtani, D. P., Mahtani, D. P., Maxted, P. F. L., Anderson, D. R., Smith, A. M. S., Smalley, B., …West, R. G. (2013). Warm Spitzer Occultation Photometry of WASP-26b at 3.6{\mu}m and 4.5{\mu}m. Monthly Notices of the Royal Astronomical Society, 432(1), 693-701. https://doi.org/10.1093/mnras/stt505

We present new warm Spitzer occultation photometry of WASP-26 at 3.6{\mu}m and 4.5{\mu}m along with new transit photometry taken in the g,r and i bands. We report the first detection of the occultation of WASP-26b, with occultation depths at 3.6{\mu}... Read More about Warm Spitzer Occultation Photometry of WASP-26b at 3.6{\mu}m and 4.5{\mu}m.

WASP-71b: a bloated hot Jupiter in a 2.9-day, prograde orbit around an evolved F8 star (2013)
Journal Article
Smith, A. M. S., Anderson, D. R., Bouchy, F., Collier Cameron, A., Doyle, A. P., Fumel, A., …West, R. G. (2013). WASP-71b: a bloated hot Jupiter in a 2.9-day, prograde orbit around an evolved F8 star. Astronomy & Astrophysics, 552, Article A120. https://doi.org/10.1051/0004-6361/201220727

We report the discovery by the WASP transit survey of a highly-irradiated, massive (2.242 ± 0.080 MJup) planet which transits a bright (V = 10.6), evolved F8 star every 2.9 days. The planet, WASP-71b, is larger than Jupiter (1.46 ± 0.13 RJup), but le... Read More about WASP-71b: a bloated hot Jupiter in a 2.9-day, prograde orbit around an evolved F8 star.

WASP-64 b and WASP-72 b: two new transiting highly irradiated giant planets (2013)
Journal Article
Gillon, M., Anderson, D. R., Collier-Cameron, A., Doyle, A. P., Fumel, A., Hellier, C., …West, R. G. (2013). WASP-64 b and WASP-72 b: two new transiting highly irradiated giant planets. Astronomy & Astrophysics, 552, Article A82. https://doi.org/10.1051/0004-6361/201220561

We report the discovery by the WASP transit survey of two new highly irradiated giant planets. WASP-64 b is slightly more massive (1.271 ± 0.068 MJup) and larger (1.271 ± 0.039 RJup) than Jupiter, and is in very-short (a = 0.02648 ± 0.00024 AU, P = 1... Read More about WASP-64 b and WASP-72 b: two new transiting highly irradiated giant planets.

A giant planet beyond the snow line in microlensing event OGLE-2011-BLG-0251 (2013)
Journal Article
Kains, N., Street, R. A., Choi, J., Han, C., Udalski, A., Almeida, L. A., …Zub, M. (2013). A giant planet beyond the snow line in microlensing event OGLE-2011-BLG-0251. Astronomy & Astrophysics, 552, Article A70. https://doi.org/10.1051/0004-6361/201220626

Aims. We present the analysis of the gravitational microlensing event OGLE-2011-BLG-0251. This anomalous event was observed by several survey and follow-up collaborations conducting microlensing observations towards the Galactic bulge. Methods. Ba... Read More about A giant planet beyond the snow line in microlensing event OGLE-2011-BLG-0251.

A J-band detection of the sub-stellar mass donor in SDSS J1433+1011 (2013)
Journal Article
Littlefair, S. P., Savoury, C. D. J., Dhillon, V. S., Marsh, T. R., Gänsicke, B. T., Butterleym, T., …Watson, C. A. (2013). A J-band detection of the sub-stellar mass donor in SDSS J1433+1011. Monthly Notices of the Royal Astronomical Society, 431(3), 2820-2825. https://doi.org/10.1093/mnras/stt378

We present time-resolved J-band spectroscopy of the short-period cataclysmic variable SDSS J143317.78+101123.3. We detect absorption lines from the sub-stellar donor star in this system, which contributes 38 ± 5 per cent to the J-band light. From the... Read More about A J-band detection of the sub-stellar mass donor in SDSS J1433+1011.