output
19942026
Showing 2011 · astro-ph.EPShow all

21 papers · 2 filters

astro-ph.EP2011★ 25 cited

Stellar jitter from variable gravitational redshift: implications for RV confirmation of habitable exoplanets

H. M. Cegla, C. A. Watson, T. R. Marsh +6

A variation of gravitational redshift, arising from stellar radius fluctuations, will introduce astrophysical noise into radial velocity measurements by shifting the centroid of th…

astro-ph.EP2011★ 59 cited

Thermal emission at 3.6-8 micron from WASP-19b: a hot Jupiter without a stratosphere orbiting an active star

D. R. Anderson, A. M. S. Smith, N. Madhusudhan +12

We report detection of thermal emission from the exoplanet WASP-19b at 3.6, 4.5, 5.8 and 8.0 micron. We used the InfraRed Array Camera on the Spitzer Space Telescope to observe two…

astro-ph.EP2011★ 47 cited

WASP-36b: A new transiting planet around a metal-poor G-dwarf, and an investigation into analyses based on a single transit light curve

A. M. S. Smith, D. R. Anderson, A. Collier Cameron +16

We report the discovery, from WASP and CORALIE, of a transiting exoplanet in a 1.54-d orbit. The host star, WASP-36, is a magnitude V = 12.7, metal-poor G2 dwarf (Teff = 5959 \pm 1…

astro-ph.EP2011★ 50 cited

Observational and Dynamical Characterization of Main-Belt Comet P/2010 R2 (La Sagra)

Henry H. Hsieh, Bin Yang, Nader Haghighipour +36

We present observations of comet-like main-belt object P/2010 R2 (La Sagra) obtained by Pan-STARRS 1 and the Faulkes Telescope-North on Haleakala in Hawaii, the University of Hawai…

astro-ph.EP2011★ 40 cited

Integral-field spectroscopy of (90482) Orcus-Vanth

B. Carry, D. Hestroffer, F. DeMeo +8

Aims. We seek to constrain the surface composition of the Trans-Neptunian Object (90482) Orcus and its small satellite Vanth, as well as their mass and density. Methods. We acquire…

astro-ph.EP2011★ 50 cited

High precision transit observations of the exoplanet WASP-13b with the RISE instrument

S. C. C. Barros, D. L. Pollacco, N. P. Gibson +3

WASP-13b is a sub-Jupiter mass exoplanet orbiting a G1V type star with a period of 4.35 days. The current uncertainty in its impact parameter (0 < b < 0.46) resulted in poorly defi…

astro-ph.EP2011★ 49 cited

WASP-50b: a hot Jupiter transiting a moderately active solar-type star

M. Gillon, A. P. Doyle, M. Lendl +22

We report the discovery by the WASP transit survey of a giant planet in a close orbit (0.0295+-0.0009 AU) around a moderately bright (V=11.6, K=10) G9 dwarf (0.89+-0.08 M_sun, 0.84…

astro-ph.EP2011★ 35 cited

A Change in the Lightcurve of Kuiper Belt Contact Binary (139775) 2001 QG298

Pedro Lacerda

New observations show that the lightcurve of Kuiper belt contact binary (139775) 2001 QG298 has changed substantially since the first observations in 2003. The 2010 lightcurve has…

astro-ph.EP2011★ 44 cited

A lower mass for the exoplanet WASP-21b

S. C. C. Barros, D. L. Pollacco, N. P. Gibson +6

We present high precision transit observations of the exoplanet WASP-21b, obtained with the RISE instrument mounted on 2.0m Liverpool Telescope. A transit model is fitted, coupled…

astro-ph.EP2011★ 61 cited

Main-Belt Comet 238P/Read Revisited

Henry H. Hsieh, Karen J. Meech, Jana Pittichova

We present a series of observations of the return of activity in main-belt comet 238P/Read. Using data obtained in July and August 2010 when 238P appeared to be largely inactive, w…

astro-ph.EP2011★ 49 cited

Physical Properties of Main-Belt Comet 176P/LINEAR

Henry H. Hsieh, Masateru Ishiguro, Pedro Lacerda +1

We present a physical characterization of main-belt comet 176P/LINEAR. Observations show the object exhibiting a fan-shaped tail in late 2005, but then becoming inactive in early 2…

astro-ph.EP2011★ 102 cited

WASP-44b, WASP-45b and WASP-46b: three short-period, transiting extrasolar planets

D. R. Anderson, A. Collier Cameron, M. Gillon +14

We report the discovery of three extrasolar planets that transit their moderately bright (Vmag = 12-13) host stars. WASP-44b is a 0.89-MJup planet in a 2.42-day orbit around a G8V…

astro-ph.EP2011★ 84 cited

WASP-35b, WASP-48b and WASP-51b: Two new planets and an independent discovery of HAT-P-30b

B. Enoch, D. R. Anderson, S. C. C. Barros +36

We report the detection of WASP-35b, a planet transiting a metal-poor ([Fe/H] = -0.15) star in the Southern hemisphere, WASP-48b, an inflated planet which may have spun-up its slig…

astro-ph.EP2011★ 176 cited

WASP-43b: The closest-orbiting hot Jupiter

Coel Hellier, D. R. Anderson, A. Collier Cameron +14

We report the discovery of WASP-43b, a hot Jupiter transiting a K7V star every 0.81 d. At 0.6-Msun the host star has the lowest mass of any star hosting a hot Jupiter. It also show…

astro-ph.EP2011★ 53 cited

WASP-23b: a transiting hot Jupiter around a K dwarf and its Rossiter-McLaughlin effect

Amaury H. M. J. Triaud, Didier Queloz, Coel Hellier +17

We report the discovery of a new transiting planet in the Southern Hemisphere. It has been found by the WASP-south transit survey and confirmed photometrically and spectroscopicall…

astro-ph.EP2011★ 74 cited

Chemical evolution of protoplanetary disks - the effects of viscous accretion, turbulent mixing and disk winds

Dominikus Heinzeller, Hideko Nomura, Catherine Walsh +1

We calculate the chemical evolution of protoplanetary disks considering radial viscous accretion, vertical turbulent mixing and vertical disk winds. We study the effects on the dis…

astro-ph.EP2011

On the Origin of Metals in Some Hot White Dwarf Photospheres

M. R. Burleigh, M. A. Barstow, J. Farihi +6

We have searched for evidence for dust and gas disks at a sample of hot DA white dwarfs 20 000K < Teff < 50 000K, without success. Although their atmospheres are polluted with heav…

astro-ph.EP2011★ 19 cited

A large-scale R-matrix calculation for electron-impact excitation of the Ne O-like ion

B. M. McLaughlin, Teck-Ghee Lee, J. A. Ludlow +4

The five J levels within a or ground state complex provide an excellent testing ground for the comparison of theoretical line ratios with astrophysically observed…

astro-ph.EP2011★ 129 cited

WASP-39b: a highly inflated Saturn-mass planet orbiting a late G-type star

F. Faedi, S. C. C. Barros, D. R. Anderson +30

We present the discovery of WASP-39b, a highly inflated transiting Saturn-mass planet orbiting a late G-type dwarf star with a period of \,d, Transit Epoch T…

astro-ph.EP2011★ 100 cited

The size distribution of Jupiter Family comet nuclei

C. Snodgrass, A. Fitzsimmons, S. C. Lowry +1

We present an updated cumulative size distribution (CSD) for Jupiter Family comet (JFC) nuclei, including a rigourous assessment of the uncertainty on the slope of the CSD. The CSD…

astro-ph.EP2011★ 25 cited

WASP-40b: independent discovery of the 0.6-Mjup transiting exoplanet HAT-P-27b

D. R. Anderson, S. C. C. Barros, I. Boisse +23

From WASP photometry and SOPHIE radial velocities we report the discovery of WASP-40b (HAT-P-27b), a 0.6 Mjup planet that transits its 12th magnitude host star every 3.04 days. The…