Search Publications
The Pan-Pacific Planet Search. VII. The Most Eccentric Planet Orbiting a Giant Star
Marshall, J. P.; Mustill, A. J.; Kane, Stephen R. +9 more
Radial velocity observations from three instruments reveal the presence of a 4 MJup planet candidate orbiting the K giant HD 76920. HD 76920b has an orbital eccentricity of 0.856 ± 0.009, making it the most eccentric planet known to orbit an evolved star. There is no indication that HD 76920 has an unseen binary companion, suggesting a …
Ultra-short-period Planets in K2 with Companions: A Double Transiting System for EPIC 220674823
Baranec, Christoph; Cochran, William D.; Duev, Dmitry A. +10 more
Two transiting planets have been identified orbiting K2 target EPIC 220674823. One object is an ultra-short-period planet (USP) with a period of just 0.57 days (13.7 hr), while the other has a period of 13.3 days. Both planets are small, with the former having a radius of {R}{{p}1}=1.5 {R}\oplus and the latter {R}{{p
Constraints on the structure of hot exozodiacal dust belts
Kirchschlager, Florian; Krivov, Alexander V.; Wolf, Sebastian +2 more
Recent interferometric surveys of nearby main-sequence stars show a faint but significant near-infrared excess in roughly two dozen systems, I.e. around 10-30 per cent of stars surveyed. This excess is attributed to dust located in the immediate vicinity of the star, the origin of which is highly debated. We used previously published interferometr…
Multiwavelength Stellar Polarimetry of the Filamentary Cloud IC5146. I. Dust Properties
Wang, Jia-Wei; Lai, Shih-Ping; Eswaraiah, Chakali +3 more
We present optical and near-infrared stellar polarization observations toward the dark filamentary clouds associated with IC5146. The data allow us to investigate the dust properties (this paper) and the magnetic field structure (Paper II). A total of 2022 background stars were detected in the R c , I\prime , H, and/or K ban…
Mars plasma system response to solar wind disturbances during solar minimum
Holmström, M.; Odstrcil, D.; Lester, M. +16 more
This paper is a phenomenological description of the ionospheric plasma and induced magnetospheric boundary (IMB) response to two different types of upstream solar wind events impacting Mars in March 2008, at the solar minimum. A total of 16 Mars Express orbits corresponding to five consecutive days is evaluated. Solar TErrestrial RElations Observa…
Long optical plateau in the afterglow of the short GRB 150424A with extended emission. Evidence for energy injection by a magnetar?
Greiner, J.; Klose, S.; Schady, P. +14 more
Context. Short-duration gamma-ray bursts (GRBs) with extended emission form a subclass of short GRBs, comprising about 15% of the short-duration sample. Afterglow detections of short GRBs are also rare (about 30%) because of their lower luminosity.
Aims: We present a multiband data set of the short burst with extended emission, GRB 150424A, c…
Lithium in CEMP-no stars: A new constraint on the lithium depletion mechanism in the early universe*
Li, Haining; Matsuno, Tadafumi; Aoki, Wako +1 more
Most relatively warm, unevolved, metal-poor stars (Teff ≳ 5800 K and [Fe/H] ≲ -1.5) exhibit almost constant lithium abundances, irrespective of metallicity or effective temperature, and thus form the so-called Spite plateau. This was originally interpreted as arising from lithium created by the Big Bang nucleosynthesis. Recent observati…
Near-infrared variability study of the central 2.3 × 2.3 arcmin2 of the Galactic Centre - II. Identification of RR Lyrae stars in the Milky Way nuclear star cluster
Morris, Mark R.; Williams, Benjamin F.; Rich, R. Michael +8 more
Because of strong and spatially highly variable interstellar extinction and extreme source crowding, the faint (K ≥ 15) stellar population in the Milky Way's nuclear star cluster is still poorly studied. RR Lyrae stars provide us with a tool to estimate the mass of the oldest, relative dim stellar population. Recently, we analysed <italic>&l…
Charge States and FIP Bias of the Solar Wind from Coronal Holes, Active Regions, and Quiet Sun
Fu, Hui; Madjarska, Maria S.; Li, Bo +3 more
Connecting in situ measured solar-wind plasma properties with typical regions on the Sun can provide an effective constraint and test to various solar wind models. We examine the statistical characteristics of the solar wind with an origin in different types of source regions. We find that the speed distribution of coronal-hole (CH) wind is bimoda…
The ALMA Frontier Fields Survey. III. 1.1 mm emission line identifications in Abell 2744, MACSJ 0416.1-2403, MACSJ 1149.5+2223, Abell 370, and Abell S1063
Kneissl, R.; Demarco, R.; Laporte, N. +12 more
Context. Most sub-mm emission line studies of galaxies to date have targeted sources with known redshifts where the frequencies of the lines are well constrained. Recent blind line scans circumvent the spectroscopic redshift requirement, which could represent a selection bias.
Aims: Our aim is to detect emission lines present in continuum ori…