Search Publications
The Hyper Suprime-Cam extended point spread functions and applications
Robotham, Aaron S. G.; Bellstedt, Sabine; Davies, Luke J. M. +2 more
We present extended point spread function (PSF) models for the Hyper Suprime-Cam Subaru Strategic Program Public Data Release 3 (HSC-SSP PDR3) in all g, r, i, Z, and Y-bands. Due to its 8.2 m primary mirror and long exposure periods, HSC combines deep images with wide-field coverage. Both properties make HSC one of the most suitable observing faci…
KASHz+SUPER: Evidence of cold molecular gas depletion in AGN hosts at cosmic noon
Alexander, D. M.; Cappi, M.; Feltre, A. +32 more
The energy released by active galactic nuclei (AGN) has the potential to heat or remove the gas of the ISM, thus likely impacting the cold molecular gas reservoir of host galaxies at first, with star formation following as a consequence on longer timescales. Previous works on high-z galaxies, which compared the gas content of those without identif…
Volume density maps of the 862 nm DIB carrier and interstellar dust. Hints on the role of carbon-rich ejecta from AGB stars
Lallement, R.; Cox, N. L. J.; Vergely, J. L.
Context. The carbonaceous macromolecules imprinting the numerous absorptions called diffuse interstellar bands (DIBs) in astronomical spectra are omnipresent in the Galaxy and beyond. They represent a considerable reservoir of organic matter. However, their chemical formulae, formation, and destruction sites remain unknown. Their spatial distribut…
Mars Express: 20 Years of Mission, Science Operations and Data Archiving
Johnstone, A.; Geiger, B.; Määttänen, A. +27 more
Launched on 2 June 2003 and arriving at Mars on 25 December 2003 after a 7-month interplanetary cruise, Mars Express was the European Space Agency's first mission to arrive at another planet. After more than 20 years in orbit, the spacecraft and science payload remain in good health and the mission has become the second oldest operational planetar…
Mixed Source Region Signatures inside Magnetic Switchback Patches Inferred by Heavy Ion Diagnostics
Landi, Enrico; Bale, Stuart D.; Owen, Christopher J. +13 more
Since Parker Solar Probe's (Parker's) first perihelion pass at the Sun, large-amplitude Alfvén waves grouped in patches have been observed near the Sun throughout the mission. Several formation processes for these magnetic switchback patches have been suggested with no definitive consensus. To provide insight into their formation, we examine the h…
Aligning Planet-hosting Binaries via Dissipative Precession in Circumstellar Disks
Vanderburg, Andrew; Rice, Malena; Christian, Sam +2 more
Recent observations have demonstrated that some subsets of even moderately wide-separation planet-hosting binaries are preferentially configured such that planetary and binary orbits appear to lie within the same plane. In this work, we explore dissipation during the protoplanetary disk phase, induced by disk warping as the system is forced into n…
Relations of Rotation and Chromospheric Activity to Stellar Age for FGK Dwarfs from Kepler and LAMOST
Xiang, Maosheng; Bi, Shaolan; Li, Yaguang +9 more
The empirical relations between rotation period, chromospheric activity, and age can be used to estimate stellar age. To calibrate these relations, we present a catalog, including the masses and ages of 52,321 FGK dwarfs, 47,489 chromospheric activity index $\mathrm{log}{R}_{\mathrm{HK}}^{+}$ , 6077 rotation periods P rot, and variabili…
Inferring system parameters from the bursts of the accretion-powered pulsar IGR J17498-2921
Galloway, D. K.; Goodwin, A. J.; Hilder, T. +2 more
Thermonuclear (type-I) bursts exhibit properties that depend both on the local surface conditions of the neutron stars on which they ignite, as well as the physical parameters of the host binary system. However, constraining the system parameters requires a comprehensive method to compare the observed bursts to simulations. We have further develop…
The Pristine survey: XXIV. The Galactic underdogs: Dynamic tales of a Milky Way metal-poor population
Sestito, Federico; Martin, Nicolas F.; Kordopatis, Georges +12 more
Context. Metal-poor stars hold key information on the early Milky Way. Through the identification and characterisation of substructures, one can understand internal mechanisms (including merger and accretion events), which are indispensable to reconstruct the formation history of the Galaxy. Aims. To allow an investigation of a population of very …
Swarming in stellar streams: Unveiling the structure of the Jhelum stream with ant colony-inspired computation
Smith, R.; Balbinot, E.; Peletier, R. +8 more
The halo of the Milky Way galaxy hosts multiple dynamically coherent substructures known as stellar streams that are remnants of tidally disrupted orbiting systems such as globular clusters (GCs) and dwarf galaxies (DGs). A particular case is that of the Jhelum stream, which is known for its unusual and complex morphology. Using the available data…