Outputs (18)

Discovery of the Closest Hot Subdwarf Binary with White Dwarf Companion (2013)
Conference Proceeding
Geier, S., Marsh, T. R., Dunlap, B. H., Barlow, B. N., Schaffenroth, V., Ziegerer, E., …Napiwotzki, R. (2013). Discovery of the Closest Hot Subdwarf Binary with White Dwarf Companion. In 18th European White Dwarf Workshop (EUROWD12) (373)

We report the discovery of an extremely close, eclipsing binary system. A white dwarf is orbited by a core He-burning compact hot subdwarf star with a period as short as ≃ 0.04987 d making this system the most compact hot subdwarf binary discovered s... Read More about Discovery of the Closest Hot Subdwarf Binary with White Dwarf Companion.

Discovery of non-radial pulsations in a stripped red-giant star (2013)
Journal Article
Serenelli, A., Maxted, P., & Miglio, A. (2013). Discovery of non-radial pulsations in a stripped red-giant star. EAS Publications Series, 63, 169-174. https://doi.org/10.1051/eas/1363019

We report the discovery of a new class of non-radial pulsating stars that are the precursors of low-mass white dwarf stars.

Thermal Emission Of Wasp-14b Revealed With Three Spitzer Eclipses (2013)
Journal Article
Maxted, Blecic, J., Harrington, J., Madhusudhan, N., Stevenson, K. B., Hardy, R. A., …Maxted, P. F. L. (2013). Thermal Emission Of Wasp-14b Revealed With Three Spitzer Eclipses. Astrophysical Journal, 779(1), https://doi.org/10.1088/0004-637X/779/1/5

Exoplanet WASP-14b is a highly irradiated, transiting hot Jupiter. Joshi et al. calculate an equilibrium temperature (T eq) of 1866 K for zero albedo and reemission from the entire planet, a mass of 7.3 ± 0.5 Jupiter masses (M J), and a radius of 1.2... Read More about Thermal Emission Of Wasp-14b Revealed With Three Spitzer Eclipses.

EL CVn-type binaries - discovery of 17 helium white dwarf precursors in bright eclipsing binary star systems (2013)
Journal Article
Maxted, P. F. L., Bloemen, S., Heber, U., Geier, S., Wheatley, P. J., Marsh, T. R., …Hadigal, S. (2014). EL CVn-type binaries - discovery of 17 helium white dwarf precursors in bright eclipsing binary star systems. Monthly Notices of the Royal Astronomical Society, 437(2), 1681-1697. https://doi.org/10.1093/mnras/stt2007

The star 1SWASP J024743.37−251549.2 was recently discovered to be a binary star in which an A-type dwarf star eclipses the remnant of a disrupted red giant star (WASP 0247−25 B). The remnant is in a rarely observed state evolving to higher effective... Read More about EL CVn-type binaries - discovery of 17 helium white dwarf precursors in bright eclipsing binary star systems.

A GROUND-BASED OPTICAL TRANSMISSION SPECTRUM OF WASP-6b (2013)
Journal Article
Jordán, A., Espinoza, N., Rabus, M., Eyheramendy, S., Sing, D. K., Désert, J., …Szentgyorgyi, A. (in press). A GROUND-BASED OPTICAL TRANSMISSION SPECTRUM OF WASP-6b. Astrophysical Journal, 778(2), 184. https://doi.org/10.1088/0004-637x/778/2/184

We present a ground-based optical transmission spectrum of the inflated sub-Jupiter-mass planet WASP-6b. The spectrum was measured in 20 spectral channels from 480 nm to 860 nm using a series of 91 spectra over a complete transit event. The observati... Read More about A GROUND-BASED OPTICAL TRANSMISSION SPECTRUM OF WASP-6b.

Discovery of WASP-65b and WASP-75b: Two hot Jupiters without highly inflated radii (2013)
Journal Article
Gómez Maqueo Chew, Y., Faedi, F., Pollacco, D., Brown, D. J. A., Doyle, A. P., Collier Cameron, A., …Watson, C. (2013). Discovery of WASP-65b and WASP-75b: Two hot Jupiters without highly inflated radii. Astronomy & Astrophysics, 559, Article A36. https://doi.org/10.1051/0004-6361/201322314

We report the discovery of two transiting hot Jupiters, WASP-65b (Mpl = 1.55 ± 0.16 MJ; Rpl = 1.11 ± 0.06 RJ), and WASP-75b (Mpl = 1.07 ± 0.05 MJ; Rpl = 1.27 ± 0.05 RJ). They orbit their host star every ~2.311, and ~2.484 days, respectively. The plan... Read More about Discovery of WASP-65b and WASP-75b: Two hot Jupiters without highly inflated radii.

Binaries discovered by the MUCHFUSS project: FBS 0117+396: An sdB+dM binary with a pulsating primary⋆ (2013)
Journal Article
Østensen, R. H., Geier, S., Schaffenroth, V., Telting, J. H., Bloemen, S., Németh, P., …Marsh, T. R. (2013). Binaries discovered by the MUCHFUSS project: FBS 0117+396: An sdB+dM binary with a pulsating primary⋆. Astronomy & Astrophysics, 559, Article A35. https://doi.org/10.1051/0004-6361/201322022

The project Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (MUCHFUSS) aims to discover subdwarf-B stars with massive compact companions such as overmassive white dwarfs (M > 1.0 M⊙), neutron stars or black holes. From the 127 su... Read More about Binaries discovered by the MUCHFUSS project: FBS 0117+396: An sdB+dM binary with a pulsating primary⋆.

Multi-periodic pulsations of a stripped red-giant star in an eclipsing binary system (2013)
Journal Article
Maxted, P. F. L., Serenelli, A. M., Miglio, A., Marsh, T. R., Heber, U., Dhillon, V. S., …Schaffenroth, V. (2013). Multi-periodic pulsations of a stripped red-giant star in an eclipsing binary system. Nature, 498(7455), 463-465. https://doi.org/10.1038/nature12192

Low-mass white-dwarf stars are the remnants of disrupted red-giant stars in binary millisecond pulsars1 and other exotic binary star systems2,3,4. Some low-mass white dwarfs cool rapidly, whereas others stay bright for millions of years because of st... Read More about Multi-periodic pulsations of a stripped red-giant star in an eclipsing binary system.

A progenitor binary and an ejected mass donor remnant of faint type Ia supernovae (2013)
Journal Article
Geier, S., Marsh, T. R., Wang, B., Dunlap, B., Barlow, B. N., Schaffenroth, V., …Napiwotzki, R. (2013). A progenitor binary and an ejected mass donor remnant of faint type Ia supernovae. Astronomy & Astrophysics, 554, Article A54. https://doi.org/10.1051/0004-6361/201321395

Type Ia supernovae (SN Ia) are the most important standard candles for measuring the expansion history of the universe. The thermonuclear explosion of a white dwarf can explain their observed properties, but neither the progenitor systems nor any ste... Read More about A progenitor binary and an ejected mass donor remnant of faint type Ia supernovae.

A new bright eclipsing hot subdwarf binary from the ASAS and SuperWASP surveys (2013)
Journal Article
Schaffenroth, V., Geier, S., Drechsel, H., Heber, U., Wils, P., Østensen, R. H., …di Scala, G. (2013). A new bright eclipsing hot subdwarf binary from the ASAS and SuperWASP surveys. Astronomy & Astrophysics, 553, Article A18. https://doi.org/10.1051/0004-6361/201220929

We report the discovery of a bright (mV = 11.6 mag), eclipsing, hot subdwarf binary of spectral type B with a late main sequence companion from the All Sky Automated Survey (ASAS 102322-3737.0). Such systems are called HW Vir stars after the prototyp... Read More about A new bright eclipsing hot subdwarf binary from the ASAS and SuperWASP surveys.