Science Archives Publication System

Swept Forward Magnetic Field Variability in High-Latitude Regions of Saturn's Magnetosphere

DOI: 10.1002/2017JA024419 Bibcode: 2017JGRA..12212328D

Coates, A. J.; Dougherty, M. K.; Masters, A. +3 more

Swept forward field is the term given to configurations of magnetic field wherein the field lines deviate from the meridional planes of a planet in the direction of its rotation. Evidence is presented for swept-forward field configurations on Cassini orbits around Saturn from the first half of 2008. These orbits were selected on the basis of high …

2017 • Journal of Geophysical Research (Space Physics)

Cassini 1

Radial Variations of Outward and Inward Alfvénic Fluctuations Based on Ulysses Observations

DOI: 10.3847/1538-4357/aa9615 Bibcode: 2017ApJ...850..177Y

Wu, D. J.; Yang, L.; Shi, J. K. +4 more

Ulysses magnetic and plasma data are used to study hourly scale Alfvénic fluctuations in the solar polar wind. The calculated energy ratio {R}_{v_A}²(cal) of inward to outward Alfvén waves is obtained from the observed Walén slope through an analytical expression, and the observed {R}_{v_A}^2<…

2017 • The Astrophysical Journal

Ulysses 1

Dust clouds and plasmoids in Saturn's magnetosphere as seen with four Cassini instruments

DOI: 10.1016/j.asr.2016.12.030 Bibcode: 2017AdSpR..59.1614K

Khalisi, Emil

We revisit the evidence for a ;dust cloud; observed by the Cassini spacecraft at Saturn in 2006. The data of four instruments are simultaneously compared to interpret the signatures of a coherent swarm of dust that would have remained near the equatorial plane for as long as six weeks. The conspicuous pattern, as seen in the dust counters of the C…

2017 • Advances in Space Research

Cassini 1

Down to earth: Popularisation of geo-information services in the Netherlands

DOI: 10.1016/j.spacepol.2017.04.001 Bibcode: 2017SpPol..41...12K

Kerstens, Nathalie; Giannopapa, Christina; Dolmans, Sharon +1 more

The popularisation of geo-information services contributes to achieving Europe's 2020 goals to become a "smart, sustainable and inclusive growth economy" [1]. From a utilitarian perspective, this implies making the benefits of geo-information available to the largest number of users possible. To this end earth observation data has been made public…

2017 • Space Policy

SMART-1 1

The AKARI FIS Catalogue of YSOs and Extragalactic Objects

DOI: 10.5303/PKAS.2017.32.1.049 Bibcode: 2017PKAS...32...49T

Marton, Gabor; Zahorecz, Sarolta; Toth, L. Viktor +2 more

The point sources in the Bright Source Catalogue of the AKARI Far-Infrared Surveyor (FIS) were classified based on their FIR and mid-IR fluxes and colours into young stellar object (YSO) and extragalactic source types using Quadratic Discriminant Analysis method (QDA) and Support Vector Machines (SVM). The reliability of the selection of YSO candi…

2017 • Publication of Korean Astronomical Society

AKARI 1

Models of Emission-Line Profiles and Spectral Energy Distributions to Characterize the Multi-Frequency Properties of Active Galactic Nuclei

DOI: 10.3390/atoms5040043 Bibcode: 2017Atoms...5...43L

La Mura, Giovanni; Berton, Marco; Chen, Sina +7 more

The spectra of active galactic nuclei (AGNs) are often characterized by a wealth of emission lines with different profiles and intensity ratios that lead to a complicated classification. Their electromagnetic radiation spans more than 10 orders of magnitude in frequency. In spite of the differences between various classes, the origin of their acti…

2017 • Atoms

INTEGRAL XMM-Newton 1

Akari All-Sky Bright Source Catalogue: Far-Infrared Luminous Quasars and the Optical Far-Infrared Correlation

DOI: 10.5303/PKAS.2017.32.1.305 Bibcode: 2017PKAS...32..305S

Pearson, Chris; Serjeant, Stephen; Sedgwick, Chris +8 more

2017 • Publication of Korean Astronomical Society

AKARI 1

Properties of Dust Obscured Galaxies in the Nep-Deep Field

DOI: 10.5303/PKAS.2017.32.1.245 Bibcode: 2017PKAS...32..245O

Burgarella, Denis; Pearson, Chris; Matsuhara, Hideo +5 more

We selected 47 DOGs at z∼1.5 using optical R (or r^{'}), AKARI 18 µm, and 24 µm color in the AKARI North Ecliptic Pole (NEP) Deep survey field. Using the colors among 3, 4, 7, and 9µm, we classified them into 3 groups; bump DOGs (23 sources), power-law DOGs (16 sources), and unknown DOGs (8 sources). We built spectral energy…

2017 • Publication of Korean Astronomical Society

AKARI Herschel 1

Comparison of some characteristics of comets 1P/Halley and 67P/Churyumov-Gerasimenko from the Vega and Rosetta mission data

DOI: 10.1134/S0038094617030054 Bibcode: 2017SoSyR..51..204K

Ksanfomality, L. V.

On March 6 and 9, 1986, for the first time in the history of science, the Russian spacecraft Vega-1 and -2 approached the nucleus of comet 1P/Halley and flew by at a small distance. A while later, on March 14, 1986, the Giotto spacecraft (European Space Agency (ESA)) followed them. Together with the Japanese spacecraft Suisei (Japan Aerospace Expl…

2017 • Solar System Research

Rosetta 1

A study on missing lines in the synthetic solar spectrum near the Ca triplet

DOI: 10.1051/0004-6361/201629817 Bibcode: 2017A&A...600A..58K

Coelho, Paula; Kitamura, Jessica R.; Martins, Lucimara P.

Synthetic stellar spectra are extensively used for many different applications in astronomy, from stellar studies (such as in the determination of atmospheric parameters of observed stellar spectra), to extragalactic studies (e.g. as one of the main ingredients of stellar population models). One of the main ingredients of synthetic spectral librar…

2017 • Astronomy and Astrophysics

Gaia 1