Publications (44)
GRB 011121: A Massive Star Progenitor
P. A. Price, E. Berger, D. E. Reichart +29
Of the cosmological gamma-ray bursts, GRB 011121 has the lowest redshift, z=0.36. More importantly, the multi-color excess in the afterglow detected in the Hubble Space Telescope (…
The Anglo-Australian Planet Search. XXIII. Two New Jupiter Analogs
Robert A. Wittenmyer, Jonathan Horner, C. G. Tinney +9
We report the discovery of two long-period giant planets from the Anglo-Australian Planet Search. HD 154857c is in a multiple-planet system, while HD 114613b appears to be solitary…
GJ 832c: A super-earth in the habitable zone
R. A. Wittenmyer, Mikko Tuomi, R. P. Butler +17
We report the detection of GJ 832c, a super-Earth orbiting near the inner edge of the habitable zone of GJ 832, an M dwarf previously known to host a Jupiter analog in a nearly-cir…
Beyond the Iron Peak: r- and s-process Elemental Abundances in Stars with Planets
J. C. Bond, D. S. Lauretta, C. G. Tinney +6
We present elemental abundances of 118 stars (28 of which are known extrasolar planetary host stars) observed as part of the Anglo-Australian Planet Search. Abundances of O, Mg, Cr…
Solar System Physics for Exoplanet Research
J. Horner, S. R. Kane, J. P. Marshall +13
Over the past three decades, we have witnessed one of the great revolutions in our understanding of the cosmos - the dawn of the Exoplanet Era. Where once we knew of just one plane…
A multiple planet system of super-Earths orbiting the brightest red dwarf star GJ887
S. V. Jeffers, S. Dreizler, J. R. Barnes +29
The nearest exoplanets to the Sun are our best possibilities for detailed characterization. We report the discovery of a compact multi-planet system of super-Earths orbiting the ne…
MASCARA-4 b/bRing-1b - A retrograde hot Jupiter around the bright A3V star HD 85628
P. Dorval, G. J. J. Talens, G. P. P. L. Otten +25
In this paper, we aim to characterize a transiting planetary candidate in the southern skies found in the combined MASCARA and bRing data sets of HD 85628, an A3V star of V = 8.2 m…
The Science Case for PILOT I: Summary and Overview
J. S. Lawrence, M. C. B. Ashley, J. Bailey +40
PILOT (the Pathfinder for an International Large Optical Telescope) is a proposed 2.5 m optical/infrared telescope to be located at Dome C on the Antarctic plateau. Conditions at D…
The Anglo-Australian Planet Search. XXII. Two New Multi-Planet Systems
Robert A. Wittenmyer, J. Horner, M. Tuomi +11
We report the detection of two new planets from the Anglo-Australian Planet Search. These planets orbit two stars each previously known to host one planet. The new planet orbiting…
Subaru IR Echelle Spectroscopy of Herbig-Haro Driving Sources I. H_2 and [Fe II] Emission
M. Takami, A. Chrysostomou, T. P. Ray +6
We present infrared echelle spectroscopy of three Herbig-Haro (HH) driving sources (SVS 13, B5-IRS 1 and HH 34 IRS) using Subaru-IRCS. The large diameter of the telescope and wide…
Secondary eclipse observations for seven hot-Jupiters from the Anglo-Australian Telescope
G. Zhou, D. Bayliss, L. Kedziora-Chudczer +4
We report detections and constraints for the near infrared Ks band secondary eclipses of seven hot-Jupiters using the IRIS2 infrared camera on the Anglo-Australian Telescope. Eclip…
A Detailed Analysis of the HD 73526 2:1 Resonant Planetary System
Robert A. Wittenmyer, Xianyu Tan, Man Hoi Lee +15
We present six years of new radial-velocity data from the Anglo-Australian and Magellan Telescopes on the HD 73526 2:1 resonant planetary system. We investigate both Keplerian and…
Near Infrared Polarization Images of the Orion Nebula
M. Tamura, R. Kandori, N. Kusakabe +11
Wide-field (~8' x 8') and deep near-infrared (JHKs bands) polarization images of the Orion nebulae (IRNe) around young stellar objects (YSOs), both massive and low-mass. We found t…
On the Frequency of Jupiter Analogs
Robert A. Wittenmyer, C. G. Tinney, Simon J. O'Toole +4
The Anglo-Australian Planet Search has now accumulated 12 years of radial-velocity data with long-term instrumental precision better than 3 m/s. In this paper, we expand on earlier…
On the Design of Deterministic Matrices for Fast Recovery of Fourier Compressible Functions
J. Bailey, M. A. Iwen, C. V. Spencer
We present a general class of compressed sensing matrices which are then demonstrated to have associated sublinear-time sparse approximation algorithms. We then develop methods for…
Secondary eclipses of WASP-18b -- Near Infrared observations with the Anglo Australian Telescope, the Magellan Clay Telescope and the LCOGT network
L. Kedziora-Chudczer, G. Zhou, J. Bailey +6
We present new eclipse observations for one of the hottest "hot Jupiters" WASP-18b, for which previously published data from HST WFC3 and Spitzer have led to radically conflicting…
Mapping the Interstellar Magnetic Field Around the Heliosphere with Polarized Starlight
P. C. Frisch, A. B. Berdyugin, V. Piirola +20
Starlight that becomes linearly polarized by magnetically aligned dust grains provides a viable diagnostic of the interstellar magnetic field (ISMF). A survey is underway to map th…
3-D selection of 167 sub-stellar companions to nearby stars
Fabo Feng, R. Paul Butler, Steven S. Vogt +20
We analyze 5108 AFGKM stars with at least five high precision radial velocity points as well as Gaia and Hipparcos astrometric data utilizing a novel pipeline developed in previous…
Detection of a warm molecular wind in DG Tauri
M. Takami, A. Chrysostomou, T. P. Ray +5
We detect near-infrared H2 emission in DG Tau using the Infrared Camera and Spectrograph (IRCS) on the 8.2-m SUBARU telescope. The spectra obtained along the jet axis show that the…
Circumstellar structure of RU Lupi down to au scales
M. Takami, J. Bailey, T. M. Gledhill +2
We have used the technique of spectro-astrometry to study the milli-arcsecond scale structure of the emission lines in the T Tauri star RU Lupi. The wings of the H-alpha emission a…
HD 222237 b: a long period super-Jupiter around a nearby star revealed by radial-velocity and Hipparcos-Gaia astrometry
Guang-Yao Xiao, Fabo Feng, Stephen A. Shectman +16
Giant planets on long period orbits around the nearest stars are among the easiest to directly image. Unfortunately these planets are difficult to fully constrain by indirect metho…
HeI 1.083 micron emission and absorption in DG Tau: line excitation in jet, hot wind, and accretion flow
M. Takami, A. Chrysostomou, J. Bailey +3
We present long-slit spectroscopy and spectro-astrometry of HeI 1.083 micron emission in the T Tauri star, DG Tau. We identify three components in the HeI feature: (1) a blueshifte…
The Frequency of Low-mass Exoplanets
S. J. O'Toole, H. R. A. Jones, C. G. Tinney +5
We report first results from the Anglo-Australian Telescope Rocky Planet Search - an intensive, high-precision Doppler planet search targeting low-mass exoplanets in contiguous 48…
The Anglo-Australian Planet Search XXV: A Candidate Massive Saturn Analog Orbiting HD 30177
Robert A. Wittenmyer, Jonathan Horner, M. W. Mengel +8
We report the discovery of a second long-period giant planet orbiting HD 30177, a star previously known to host a massive Jupiter analog (HD 30177b: a=3.80.1 au, m sin $i=9.7\…
Nanoscale X-Ray Imaging of Spin Dynamics in Yttrium Iron Garnet
J. Förster, S. Wintz, J. Bailey +13
Time-resolved scanning transmission x-ray microscopy (TR-STXM) has been used for the direct imaging of spin wave dynamics in thin film yttrium iron garnet (YIG) with spatial resolu…
Fast C-V method to mitigate effects of deep levels in CIGS doping profiles
P. K. Paul, J. Bailey, G. Zapalac +1
In this work, methods to determine more accurate doping profiles in semiconductors is explored where trap-induced artifacts such as hysteresis and doping artifacts are observed. Sp…
Cool Jupiters greatly outnumber their toasty siblings: Occurrence rates from the Anglo-Australian Planet Search
Robert A. Wittenmyer, Songhu Wang, Jonathan Horner +8
Our understanding of planetary systems different to our own has grown dramatically in the past 30 years. However, our efforts to ascertain the degree to which the Solar system is a…
Forever alone? Testing single eccentric planetary systems for multiple companions
Robert A. Wittenmyer, Songhu Wang, Jonathan Horner +9
Determining the orbital eccentricity of an extrasolar planet is critically important for understanding the system's dynamical environment and history. However, eccentricity is ofte…
The Frequency of Low-Mass Exoplanets. II. The `Period Valley'
Robert A. Wittenmyer, Simon J. O'Toole, H. R. A. Jones +4
Radial-velocity planet search campaigns are now beginning to detect low-mass "Super-Earth" planets, with minimum masses M sin i < 10 M_earth. Using two independently-developed meth…
Near-Infrared Circular Polarimetry and Correlation Diagrams in the Orion BN/KL Region: Contribution of Dichroic Extinction
T. Fukue, M. Tamura, R. Kandori +8
We present a deep circular polarization image of the Orion BN/KL nebula in the Ks band and correlations of circular polarization, linear polarization, and H-Ks color representing e…
The Science Case for PILOT III: the Nearby Universe
J. S. Lawrence, M. C. B. Ashley, J. Bailey +20
PILOT (the Pathfinder for an International Large Optical Telescope is a proposed 2.5 m optical/infrared telescope to be located at DomeC on the Antarctic plateau. The atmospheric c…
NIRSPEC Radial Velocity Measurements of Late-M Dwarfs
A. Tanner, R. White, J. Bailey +1
With an emphasis in detecting Earth-like planets set forth by the 2010 Decadal Survey and in searching for planets around M dwarfs set forth by the 2008 Exoplanet Task Force, radia…
Simultaneous infrared and optical observations of the transiting debris cloud around WD 1145+017
G. Zhou, L. Kedziora-Chudczer, J. Bailey +14
We present multi-wavelength photometric monitoring of WD 1145+017, a white dwarf exhibiting periodic dimming events interpreted to be the transits of orbiting, disintegrating plane…
The 2~m spectrum of the auroral emission in the polar regions of Jupiter
L. Kedziora-Chudczer, D. V. Cotton, D. J. Kedziora +1
We report observations of the high (R18000) and medium (R5900) resolution, near-infrared spectra of Jupiter's polar regions with the GNIRS instrument at the Gemini Nort…
HATS-31b Through HATS-35b: Five Transiting Hot Jupiters Discovered by the HATSouth Survey
M. de Val-Borro, G. Ã. Bakos, R. Brahm +24
We report the discovery of five new transiting hot Jupiter planets discovered by the HATSouth survey: HATS-31b through HATS-35b. These planets orbit moderately bright stars with V…
Ks band secondary eclipses of WASP-19b and WASP-43b with the Anglo-Australian Telescope
G. Zhou, D. D. R. Bayliss, L. Kedziora-Chudczer +3
We report new Ks band secondary eclipse observations for the hot-Jupiters WASP-19b and WASP-43b. Using the IRIS2 infrared camera on the Anglo-Australian Telescope (AAT), we measure…
HATS-70b: A 13 Mjup brown dwarf transiting an A star
G. Zhou, G. Ã. Bakos, D. Bayliss +23
We report the discovery of HATS-70b, a transiting brown dwarf at the deuterium burning limit. HATS-70b has a mass of Mp=12.9 +1.8/-1.6 Mjup and a radius of Rp=1.384 +0.079/-0.074 R…
Observing Strategies for the Detection of Jupiter Analogs
Robert A. Wittenmyer, J. Horner, R. P. Butler +6
To understand the frequency, and thus the formation and evolution, of planetary systems like our own solar system, it is critical to detect Jupiter-like planets in Jupiter-like orb…
The Frequency of Low-Mass Exoplanets. III. Toward eta-Earth at Short Periods
Robert A. Wittenmyer, C. G. Tinney, R. P. Butler +5
Determining the occurrence rate of terrestrial-mass planets (m_p < 10M_earth) is a critically important step on the path towards determining the frequency of Earth-like planets (et…
Advances in aviation radiation mitigation were demonstrated during the Gannon storm
W. K. Tobiska, B. Hogan, L. Didkovsky +5
A validation strategy for aviation radiation hazard mitigation has been completed using two commercial airline flights in 2024 and 2025. We review the strategy primary elements, in…
On the Detection of Artefacts in Spectro-astrometry
E. Brannigan, M. Takami, A. Chrysostomou +1
We demonstrate that artificial bipolar structure can be detected using spectro-astrometry when the point spread function (PSF) of a point source suffers distortion in a relatively…
Polarization measurements of hot dust stars and the local interstellar medium
J. P. Marshall, D. V. Cotton, K. Bott +7
Debris discs are typically revealed through excess emission at infrared wavelengths. Most discs exhibit excess at mid- and far-infrared wavelengths, analogous to the solar system's…
The Anglo-Australian Planet Search XXIV: The Frequency of Jupiter Analogs
Robert A. Wittenmyer, R. P. Butler, C. G. Tinney +6
We present updated simulations of the detectability of Jupiter analogs by the 17-year Anglo-Australian Planet Search. The occurrence rate of Jupiter-like planets that have remained…
Selection Functions in Doppler Planet Searches
S. J. O'Toole, C. G. Tinney, H. R. A. Jones +4
We present a preliminary analysis of the sensitivity of Anglo-Australian Planet Search data to the orbital parameters of extrasolar planets. To do so, we have developed new tools f…