Search Publications
Spectral Energy Distribution Mapping of Two Elliptical Galaxies on Sub-kpc Scales
Gaspari, M.; Amblard, A.; Temi, P. +1 more
We use high-resolution Herschel-PACS data of two nearby elliptical galaxies, IC 1459 and NGC 2768, to characterize their dust and stellar content. IC 1459 and NGC 2768 have an unusually large amount of dust for elliptical galaxies ((1-3) × 105 {M}⊙ ); this dust is also not distributed along the stellar content. Using data fro…
Magnetic signatures of ion cyclotron waves during Cassini's high-inclination orbits of Saturn
Simon, Sven; Meeks, Zachary
Based on magnetic field data from Cassini's high-inclination orbits of Saturn (radius RS = 60 , 268 km), we analyze the latitudinal distribution of ion cyclotron waves in the giant planet's magnetosphere. Our survey takes into account magnetic field data from all high-inclination orbits between 2004 and 2015. We analyze the dependency o…
The role of the background in past and future X-ray missions
Molendi, Silvano
Background has played an important role in X-ray missions, limiting the exploitation of science data in several and sometimes unexpected ways. In this presentation I review past X-ray missions focusing on some important lessons we can learn from them. I then go on discussing prospects for overcoming background related limitations in future ones.
Dependence of the Peak Fluxes of Solar Energetic Particles on CME 3D Parameters from STEREO and SOHO
Moon, Y. -J.; Lee, Harim; Park, Jinhye
We investigate the relationships between the peak fluxes of 18 solar energetic particle (SEP) events and associated coronal mass ejection (CME) 3D parameters (speed, angular width, and separation angle) obtained from SOHO, and STEREO-A/B for the period from 2010 August to 2013 June. We apply the STEREO CME Analysis Tool (StereoCAT) to the SEP-asso…
Global geomagnetic responses to the IMF Bz fluctuations during the September/October 2003 high-speed stream intervals
Echer, Ezequiel; Korth, Axel; José Alves Bolzan, Mauricio +1 more
In this paper, we follow the coupling from the solar wind to the Earth's magnetotail, geosynchronous orbit, auroral zone and to the ground, during periods of Alfvénic fluctuations in high-speed solar wind streams (HSSs) and their corotating interaction regions (CIRs). We employ cross-wavelet analysis of magnetic field, particle flux and auroral el…
Open star clusters in the Milky Way. Comparison of photometric and trigonometric distance scales based on Gaia TGAS data
Reffert, Sabine; Scholz, Ralf-Dieter; Kovaleva, Dana A. +5 more
Context. The global survey of star clusters in the Milky Way (MWSC) is a comprehensive list of 3061 objects that provides, among other parameters, distances to clusters based on isochrone fitting. The Tycho-Gaia Astrometric Solution (TGAS) catalogue, which is a part of Gaia data release 1 (Gaia DR1), delivers accurate trigonometric parallax measur…
The Galaxy's veil of excited hydrogen
Zaritsky, Dennis; Zhang, Huanian
Many of the baryons in our Galaxy probably lie outside the well-known disk and bulge components. Despite a wealth of evidence for the presence of some gas in galactic halos—including absorption line systems in the spectra of quasars, high-velocity neutral hydrogen clouds in our Galaxy halo, line-emitting ionized hydrogen originating from galactic …
Erratum: “Dust and Gas in the Magellanic Clouds from the HERITAGE Herschel Key Project. I. Dust Properties and Insights into the Origin of the Submm Excess Emission” (2014, ApJ, 797, 85)
Okumura, K.; Gordon, Karl D.; Bot, Caroline +33 more
Gaia Data Release 1. The archive visualisation service
Mora, A.; Jordan, S.; Luri, X. +31 more
Context. The first Gaia data release (DR1) delivered a catalogue of astrometry and photometry for over a billion astronomical sources. Within the panoplyof methods used for data exploration, visualisation is often the starting point and even the guiding reference for scientific thought. However, this is a volume of data that cannot be efficiently …
First hard X-ray detection and broad-band X-ray study of the unidentified transient AX J1949.8+2534
Masetti, N.; Sidoli, L.; Bird, A. J. +3 more
We present the results from INTEGRAL and Swift/XRT observations of the hitherto poorly studied unidentified X-ray transient AX J1949.8+2534, and on archival multiwavelength observations of field objects. Bright hard X-ray outbursts have been discovered above 20 keV for the first time, the measured duty cycle and dynamic range are of the order of ∼…