Search Publications
Nonparametric galaxy morphology from UV to submm wavelengths
Clark, Christopher J. R.; Mosenkov, Aleksandr V.; De Looze, Ilse +13 more
We present the first nonparametric morphological analysis of a set of spiral galaxies from UV to submillimeter (submm) wavelengths. Our study is based on high-quality multi-wavelength imaging for nine well-resolved spiral galaxies from the DustPedia database, combined with nonparametric morphology indicators calculated in a consistent way using th…
Molecular gas in CLASH brightest cluster galaxies at z ∼ 0.2 - 0.9
Jablonka, P.; Castignani, G.; Combes, F. +4 more
Brightest cluster galaxies (BCGs) are excellent laboratories for the study of galaxy evolution in dense Mpc-scale environments. We used the IRAM-30 m to observe, in CO(1→0), CO(2→1), CO(3→2), or CO(4→3), 18 BCGs at z ∼ 0.2 - 0.9 drawn from the Cluster Lensing And Supernova survey with Hubble (CLASH) survey. Our sample includes RX1532, which is our…
The dynamics of the γ Vel cluster and nearby Vela OB2 association
Wright, Nicholas J.; Jeffries, R. D.; Jackson, R. J. +1 more
The kinematics of low-mass stars in nearby OB associations can provide clues about their origins and evolution. Combining the precise positions, proper motions, and parallaxes given in the second Gaia Data Release with radial-velocity measurements obtained with the Hermes spectrograph at the Anglo-Australian Telescope, we have an opportunity to st…
SPInS, a pipeline for massive stellar parameter inference. A public Python tool to age-date, weigh, size up stars, and more
Reese, D. R.; Lebreton, Y.
Context. Stellar parameters are required in a variety of contexts, ranging from the characterisation of exoplanets to Galactic archaeology. Among them, the age of stars cannot be directly measured, while the mass and radius can be measured in some particular cases (e.g. binary systems, interferometry). More generally, stellar ages, masses, and rad…
Spacecraft and interplanetary contributions to the magnetic environment on-board LISA Pathfinder
Mendes, L.; Russano, G.; Nofrarias, M. +79 more
LISA Pathfinder (LPF) has been a space-based mission designed to test new technologies that will be required for a gravitational wave observatory in space. Magnetically driven forces play a key role in the instrument sensitivity in the low-frequency regime (mHz and below), the measurement band of interest for a space-based observatory. The magneti…
Extreme variability in an active galactic nucleus: Gaia16aax
Hewett, P. C.; Kostrzewa-Rutkowska, Z.; Wevers, T. +12 more
We present the results of a multiwavelength follow-up campaign for the luminous nuclear transient Gaia16aax, which was first identified in 2016 January. The transient is spatially consistent with the nucleus of an active galaxy at z = 0.25, hosting a black hole of mass ∼ 6× 10^8 M_⊙. The nucleus brightened by more than 1 mag in the Gaia G band ove…
The Effect of Cosmic Rays on Cometary Nuclei. I. Dose Deposition
Gunell, H.; Rubin, M.; De Keyser, J. +9 more
Comets are small bodies thought to contain the most pristine material in the solar system. However, since their formation ≈4.5 Gy ago, they have been altered by different processes. While not exposed to much electromagnetic radiation, they experience intense particle radiation. Galactic cosmic rays and solar energetic particles have a broad spectr…
The Magellanic Edges Survey I: Description and first results
Da Costa, G. S.; Belokurov, V.; Koposov, S. E. +6 more
We present an overview of, and first science results from, the Magellanic Edges Survey (MagES), an ongoing spectroscopic survey mapping the kinematics of red clump and red giant branch stars in the highly substructured periphery of the Magellanic Clouds. In conjunction with Gaia astrometry, MagES yields a sample of ~7000 stars with individual 3D v…
Heating Rates for Protons and Electrons in Polar Coronal Holes: Empirical Constraints from the Ultraviolet Coronagraph Spectrometer
Cranmer, Steven R.
Ultraviolet spectroscopy of the extended solar corona is a powerful tool for measuring the properties of protons, electrons, and heavy ions in the accelerating solar wind. The large coronal holes that expand up from the north and south poles at solar minimum are low-density collisionless regions in which it is possible to detect departures from on…
Spectroscopic and photometric periods of six ultracompact accreting binaries
Dhillon, V. S.; Parsons, Steven G.; Littlefair, S. P. +19 more
Ultracompact accreting binary systems each consist of a stellar remnant accreting helium-enriched material from a compact donor star. Such binaries include two related sub-classes, AM CVn-type binaries and helium cataclysmic variables, in both of which the central star is a white dwarf. We present a spectroscopic and photometric study of six accre…