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The shocked molecular layer in RCW 120
Kirsanova, M. S.; Olofsson, A. O. H.; Semenov, D. A. +2 more
Expansion of wind-blown bubbles or H II regions lead to formation of shocks in the interstellar medium, which compress surrounding gas into dense layers. We made spatially and velocity-resolved observations of the RCW 120 photo-dissociation region (PDR) and nearby molecular gas with CO(6-5) and 13CO(6-5) lines and distinguished a bright…
X-ray spectroscopy of the accretion disk corona source 2S 0921-630 with Suzaku archival data
Dotani, Tadayasu; Yoneyama, Tomokage
2S 0921-630 is an eclipsing low-mass X-ray binary (LMXB) with an orbital period of ~9 d. Past X-ray observations have revealed that 2S 0921-630 has an extended accretion disk corona (ADC), from which most of the X-rays from the system are emitted. We report the result of our Suzaku archival data analysis of 2S 0921-630. The average X-ray spectrum …
New members of the Lupus I cloud based on Gaia astrometry. Physical and accretion properties from X-shooter spectra
Bayo, A.; Alcalá, J. M.; Montalto, M. +13 more
We characterize twelve young stellar objects (YSOs) located in the Lupus I region, spatially overlapping with the Upper Centaurus Lupus (UCL) sub-stellar association. The aim of this study is to understand whether the Lupus I cloud has more members than what has been claimed so far in the literature and gain a deeper insight into the global proper…
J-PLUS: characterization of high-velocity stars in the second data release
Hernández-Monteagudo, C.; Pereira, C. B.; Placco, V. M. +18 more
High-velocity stars in the Milky Way are related to extreme astrophysical phenomena. In this work, we characterize 28 stars with Galactocentric velocities higher than 400 $\mathrm{km\, s^{-1}}$ observed in the Javalambre Photometric Local Universe Survey Data Release 2 (J-PLUS DR2) survey. We combine J-PLUS photometry with astrometric data from th…
Observations of a dust tail gap in comet C/2014 Q1 (PanSTARRS)
Afghan, Qasim; Jones, Geraint H.; Price, Oliver +1 more
Cometary dust tails display a wide array of structures, most believed to be caused by a variable dust production, size distributions, fragmentation processes, and interactions with the solar wind, e.g. Price et al. (2019). However, not all these structures are fully understood. Here we report the discovery of a curious new dust tail feature, first…
Carbonates and ices in the z = 0.89 galaxy-absorber towards PKS 1830-211 and within star-forming regions of the Milky Way
Bowey, Janet E.
A pair of 6.0 and 6.9 µm absorption features are frequently observed in Milky Way (MW) molecular-clouds and YSOs; they also occur in the z = 0.886 rest-frame of a molecule-rich spiral galaxy obscuring blazar PKS 1830-211. I calibrate χ2-fitting methods, which match observations with two or three laboratory spectra. The 6.0-µ…
The Breakthrough Listen Search for Intelligent Life: Nearby Stars' Close Encounters with the Brightest Earth Transmissions
Isaacson, Howard; Derrick, Reilly
After having left the heliosphere, Voyager 1 and Voyager 2 continue to travel through interstellar space. The Pioneer 10, Pioneer 11, and New Horizons spacecraft are also on paths to pass the heliopause. These spacecraft have communicated with the Deep Station Network (DSN) radio antennas in order to download scientific data and telemetry data. Ou…
A correlation between accreted stellar kinematics and dark-matter halo spin in the ARTEMIS simulations
Belokurov, Vasily; Evans, N. Wyn; Dillamore, Adam M. +1 more
We report a correlation between the presence of a Gaia-Sausage-Enceladus (GSE) analogue and dark-matter (DM) halo spin in the ARTEMIS simulations of Milky Way-like galaxies. The haloes which contain a large population of accreted stars on highly radial orbits (like the GSE) have lower spin on average than their counterparts with more isotropic ste…
A High-Resolution Digital Terrain Model Mosaic of the Mars 2020 Perseverance Rover Landing Site at Jezero Crater
Tao, Yu; Muller, Jan-Peter; Xiong, Siting +2 more
We demonstrate the capabilities of a published MADNet monocular height estimation network in producing a refined digital terrain model (DTM) mosaic at 50 cm/pixel resolution for the Mars 2020 Perseverance rover landing site in Jezero crater on Mars. Our approach utilizes the publicly available Mars 2020 Terrain Relative Navigation (TRN) High-Resol…
Variable Star Detection in the Field of Open Cluster NGC 188
Zhang, Yu; Esamdin, Ali; Song, Fang-Fang +2 more
This work presents the charge-coupled device (CCD) photometric survey of the old open cluster NGC 188. Time-series V-band photometric observations were conducted for ten nights in 2017 January using the Nanshan One-meter Wide-field Telescope to search for variable stars in the field of the cluster. A total of 25 variable stars, including one new v…