Search Publications
A Submillimeter Perspective on the GOODS Fields (SUPER GOODS). IV. The Submillimeter Properties of X-Ray Sources in the CDF-S
Bauer, F. E.; Barger, A. J.; Cowie, L. L. +1 more
The Chandra Deep Field (CDF)-S is the deepest X-ray image available and will remain so for the near future. We provide a spectroscopic (64.5%; 64% with spectral classifications) and photometric redshift catalog for the full 7 Ms sample, but much of our analysis focuses on the central (off-axis angles <5.‧7) region, which contains a large, faint…
A common origin for dynamically associated near-Earth asteroid pairs
Wasserman, Lawrence H.; Hora, Joseph L.; Thirouin, Audrey +19 more
Though pairs of dynamically associated asteroids in the Main Belt have been identified and studied for over a decade, very few pair systems have been identified in the near-Earth asteroid population. We present data and analysis that supports the existence of two genetically related pairs in near-Earth space. The members of the individual systems,…
IC 4665 DANCe. I. Members, empirical isochrones, magnitude distributions, present-day system mass function, and spatial distribution
Tamura, M.; Bertin, E.; Miret-Roig, N. +12 more
Context. The study of star formation is extremely challenging, due to the lack of complete and clean samples of young nearby clusters and star-forming regions. The recent Gaia DR2 catalogue complemented with the deep ground-based COSMIC DANCe catalogue offers a new database of unprecedented accuracy to revisit the membership of clusters and star-f…
Forbush Decreases and <2 Day GCR Flux Non-recurrent Variations Studied with LISA Pathfinder
Mendes, L.; Russano, G.; Lloro, I. +82 more
Non-recurrent short-term variations of the galactic cosmic-ray (GCR) flux above 70 MeV n-1 were observed between 2016 February 18 and 2017 July 3 on board the European Space Agency LISA Pathfinder (LPF) mission orbiting around the Lagrange point L1 at 1.5 × 106 km from Earth. The energy dependence of three Forbush decreases i…
An Extended Study of the Precursory Signs of Forbush Decreases: New Findings over the Years 2008 - 2016
Mavromichalaki, H.; Belov, A.; Eroshenko, E. +3 more
In spite of the fact that the current Solar Cycle 24 is close to its end now, it is a less active Solar Cycle, during its time period (2008 - 2016) and a lot of Forbush decreases of cosmic ray intensity with rigidity 10 GV and amplitude greater than 2% were recorded by the ground-based neutron monitors. Among these events, the ones associated with…
Signatures of Cold Ions in a Kinetic Simulation of the Reconnecting Magnetopause
Lavraud, B.; Toledo-Redondo, S.; Aunai, N. +2 more
At the Earth's magnetopause, a low-energy ion population of ionospheric origin is commonly observed at the magnetospheric side. In this work we use a 2-D fully kinetic simulation to identify several original signatures related to the dynamics of cold ions involved in magnetic reconnection at the asymmetric dayside magnetopause. We identify several…
On the Origin of the Scatter in the Red Sequence: An Analysis of Four CLASH Clusters
Donahue, Megan; Kelson, Daniel D.; Moustakas, John +1 more
In clusters of galaxies, the red sequence is believed to be a consequence of a correlation between stellar mass and chemical abundances, with more massive galaxies being more metal-rich and, as a consequence, redder. However, there is a color scatter around the red sequence that holds even with precision photometry, implying that the galaxy popula…
Star-forming galaxies at low-redshift in the SHARDS survey
Mas-Hesse, J. M.; Hernán-Caballero, A.; Koekemoer, A. M. +13 more
Context. The physical processes driving the evolution of star formation (SF) in galaxies over cosmic time still present many open questions. Recent galaxy surveys allow now to study these processes in great detail at intermediate redshift (0 ≤ z ≤ 0.5).
Aims: We build a complete sample of star-forming galaxies and analyze their properties, re…
Equatorial Kelvin-like waves on slowly rotating and/or small-sized spheres: Application to Venus and Titan
Yamamoto, Masaru
Equatorial Kelvin waves, which have been observed in planetary fluids, produce superrotation and climatological variability. Although the meridional flow component is zero on Earth's beta-plane in the absence of background basic flow, it cannot be neglected on spheres in some planetary fluids when the Lamb parameter is small. For a vertically prop…
AXS: A Framework for Fast Astronomical Data Processing Based on Apache Spark
Bellm, Eric C.; Golkhou, V. Zach; Jurić, Mario +5 more
We introduce AXS (Astronomy eXtensions for Spark), a scalable open-source astronomical data analysis framework built on Apache Spark, a widely used industry-standard engine for big-data processing. Building on capabilities present in Spark, AXS aims to enable querying and analyzing almost arbitrarily large astronomical catalogs using familiar Pyth…