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Using binaries in globular clusters to catch sight of intermediate-mass black holes
Bianchini, Paolo; Mastrobuono-Battisti, Alessandra; Sippel, Anna C. +3 more
The dynamical evolution of globular clusters (GCs) is tied to their binary population, as binaries segregate to the cluster centre, leading to an increased binary fraction in the core. This central overabundance of mainly hard binaries can serve as a source of energy for the cluster and has a significant effect on the observed kinematics, such as …
Energy Supply by Low-frequency Break Sweeping for Heating the Fast Solar Wind from 0.3 to 4.8 au
He, Jiansen; Wang, Xin; Tu, Chuanyi +3 more
Solar wind protons undergo significant heating during the expansion of the solar wind and turbulence plays an important role in this process. It is believed that the energy is injected from the energy-containing range into the inertial range and then transferred to dissipate into heat eventually. However, the energy injection process in the helios…
Powerful multiphase outflows in the central region of Cygnus A
Riffel, R. A.
We use Gemini Near-Infrared Integral Field Spectrograph (NIFS) observations of the inner 3.5 × 3.5 kpc2 of the radio galaxy Cygnus A to map the gas excitation and kinematics at a spatial resolution of 200 pc. The emission of the ionized gas shows a biconical morphology, with half-opening angle of 45○ and oriented along the po…
The Binary INformation from Open Clusters Using SEDs (BINOCS) Project: Reliable Photometric Mass Determinations of Binary Star Systems in Clusters
Donor, John; Frinchaboy, Peter M.; Spoo, Taylor +1 more
We introduce a new binary detection technique, Binary INformation from Open Clusters using SEDs (BINOCS), which we show is able to determine reliable stellar multiplicity and masses over a much larger mass range than current approaches. This new technique determines accurate component masses of binary and single systems of the open clusters' main …
Haze Seasonal Variations of Titan's Upper Atmosphere during the Cassini Mission
West, Robert A.; Vinatier, Sandrine; Seignovert, Benoît +1 more
This study presents a 13 yr survey of haze UV extinction profiles, monitoring the temporal evolution of the detached haze layer (DHL) in Titan's upper atmosphere (350-600 km). As reported by West et al. (GRL vol.38, L06204) at the equator, we show that the DHL was present at all latitudes below 55°N during the northern winter (2004-2009). Subseque…
Detection of Lyman Continuum from 3.0 < z < 3.5 Galaxies in the HETDEX Survey
Finkelstein, Steven L.; Schneider, Donald P.; Chisholm, John +15 more
Questions as to what drove the bulk reionization of the universe, how that reionization proceeded, and how the hard ionizing radiation reached the intergalactic medium remain open and debated. Observations probing that epoch are severely hampered by the increasing amounts of neutral gas with increasing redshift, so a small, but growing, number of …
Rapid Single Image-Based DTM Estimation from ExoMars TGO CaSSIS Images Using Generative Adversarial U-Nets
Tao, Yu; Muller, Jan-Peter; Conway, Susan J. +5 more
Observations with the Differential Speckle Survey Instrument. X. Preliminary Orbits of K-dwarf Binaries and Other Stars
Henry, Todd J.; Clark, Catherine A.; van Belle, Gerard T. +8 more
This paper details speckle observations of binary stars taken at the Lowell Discovery Telescope, the WIYN telescope, and the Gemini telescopes between 2016 January and 2019 September. The observations taken at Gemini and Lowell were done with the Differential Speckle Survey Instrument (DSSI), and those done at WIYN were taken with the successor in…
Magnetic dipole and electric quadrupole absorption in carbon dioxide
Montmessin, F.; Fedorova, A.; Korablev, O. I. +3 more
Magnetic dipole and electric quadrupole absorption in carbon dioxide are addressed in details. The selection rules for both processes are presented. The equations for the line intensities are given. In the case of the quadrupole absorption the Herman-Wallis functions are derived. The results of the present paper were used in the analysis of the ca…
Observations of a prominence eruption and loop contraction
Joshi, Bhuwan; Schmieder, Brigitte; Joshi, Reetika +3 more
Context. Prominence eruptions provide key observations to understand the launch of coronal mass ejections as their cold plasma traces a part of the unstable magnetic configuration.
Aims: We select a well observed case to derive observational constraints for eruption models.
Methods: We analyze the prominence eruption and loop expansion a…