Search Publications
Missions
Journals
Publication Years
Investigating Mercury's Environment with the Two-Spacecraft BepiColombo Mission
André, N.; Kallio, E.; Barabash, S. +76 more
The ESA-JAXA BepiColombo mission will provide simultaneous measurements from two spacecraft, offering an unprecedented opportunity to investigate magnetospheric and exospheric dynamics at Mercury as well as their interactions with the solar wind, radiation, and interplanetary dust. Many scientific instruments onboard the two spacecraft will be com…
Binary deviations from single object astrometry
Koposov, S. E.; Belokurov, Vasily; Penoyre, Zephyr +2 more
Most binaries are undetected. Astrometric reductions of a system using the assumption that the object moves like a single point mass can be biased by unresolved binary stars. The discrepancy between the centre of mass of the system (which moves like a point mass) and the centre of light (which is what we observe) introduces additional motion. We e…
A heatwave of accretion energy traced by masers in the G358-MM1 high-mass protostar
Eislöffel, J.; Stecklum, B.; Kim, Kee-Tae +20 more
High-mass stars are thought to accumulate much of their mass via short, infrequent bursts of disk-aided accretion1,2. Such accretion events are rare and difficult to observe directly but are known to drive enhanced maser emission3-6. In this Letter we report high-resolution, multi-epoch methanol maser observations toward G358…
Structural Evolution in Massive Galaxies at z ∼ 2
Übler, Hannah; Mowla, Lamiya; Kohno, Kotaro +18 more
We present 0"2 resolution Atacama Large Millimeter/submillimeter Array (ALMA) observations at 870 µm in a stellar mass-selected sample of 85 massive ( ${M}_{\star }\gt {10}^{11}\,{M}_{\odot }$ ) star-forming galaxies (SFGs) at $z=1.9\mbox{--}2.6$ in the CANDELS/3D-Hubble Space Telescope fields of UDS and GOODS-S. We measure the effective rad…
A Low-mass Stellar-debris Stream Associated with a Globular Cluster Pair in the Halo
Huang, Yang; Beers, Timothy C.; Chang, Jiang +1 more
There are expected to be physical relationships between the globular clusters (GCs) and stellar substructures in the Milky Way, not all of which have yet been found. We search for such substructures from a combined halo sample of SDSS blue horizontal-branch and SDSS+LAMOST RR Lyrae stars, cross-matched with astrometric information from Gaia DR2. T…
Modelling the He I triplet absorption at 10 830 Å in the atmosphere of HD 209458 b
Alonso-Floriano, F. J.; Sánchez-López, A.; López-Puertas, M. +16 more
Context. HD 209458 b is an exoplanet with an upper atmosphere undergoing blow-off escape that has mainly been studied using measurements of the Lyα absorption. Recently, high-resolution measurements of absorption in the He I triplet line at 10 830 Å of several exoplanets (including HD 209458 b) have been reported, creating a new opportunity to pro…
Palomar Gattini-IR: Survey Overview, Data Processing System, On-sky Performance and First Results
Soria, Roberto; Burdge, Kevin B.; De, Kishalay +24 more
Palomar Gattini-IR is a new wide-field, near-infrared (NIR) robotic time domain survey operating at Palomar Observatory. Using a 30 cm telescope mounted with a H2RG detector, Gattini-IR achieves a field of view (FOV) of 25 sq. deg. with a pixel scale of 8.″7 in J-band. Here, we describe the system design, survey operations, data processing system …
A Probabilistic Approach to Kepler Completeness and Reliability for Exoplanet Occurrence Rates
Huber, D.; Mullally, S. E.; Berger, T. +5 more
Exoplanet catalogs produced by surveys suffer from a lack of completeness (not every planet is detected) and less than perfect reliability (not every planet in the catalog is a true planet), particularly near the survey's detection limit. Exoplanet occurrence rate studies based on such a catalog must be corrected for completeness and reliability. …
X-ray detected AGN in SDSS dwarf galaxies
Birchall, Keir L.; Watson, M. G.; Aird, J.
In this work we present a robust quantification of X-ray selected AGN in local (z ≤ 0.25) dwarf galaxies (M_* ≤ 3 × 10^9 M_⊙ ). We define a parent sample of 4331 dwarf galaxies found within the footprint of both the MPA-JHU galaxy catalogue (based on SDSS DR8) and 3XMM DR7, performed a careful review of the data to remove misidentifications and pr…
Stellar rotation periods from K2 Campaigns 0-18. Evidence for rotation period bimodality and simultaneous variability decrease
Reinhold, Timo; Hekker, Saskia
Context. Rotation period measurements of stars observed with the Kepler mission have revealed a lack of stars at intermediate rotation periods, accompanied by a decrease of photometric variability. Whether this so-called dearth region is a peculiarity of stars in the Kepler field, or reflects a general manifestation of stellar magnetic activity, i…