Search Publications
Low Ionization State Plasma in Coronal Mass Ejections
Raymond, John C.; Lee, Jin-Yi
The Ultraviolet Coronagraph Spectrometer (UVCS) on board the Solar and Heliospheric Observatory often observes low ionization state coronal mass ejection (CME) plasma at ultraviolet wavelengths. The CME plasmas are often detected in O VI (3 × 105 K), C III (8 × 104 K), Lyα, and Lyβ, with the low ionization plasma confined to …
Infrared observations of the recurrent nova T Pyxidis: ancient dust basks in the warm glow of the 2011 outburst★
Ness, J. -U.; Gehrz, R. D.; Eyres, S. P. S. +15 more
We present Spitzer Space Telescope and Herschel Space Observatory infrared observations of the recurrent nova T Pyx during its 2011 eruption, complemented by ground-base optical-infrared photometry. We find that the eruption has heated dust in the pre-existing nebulosity associated with T Pyx. This is most likely interstellar dust swept up by T Py…
Mid-infrared spectra of differentiated meteorites (achondrites): Comparison with astronomical observations of dust in protoplanetary and debris disks
Koike, Chiyoe; Mason, Andrew; Morlok, Andreas +4 more
Mid-infrared (5-25 µm) transmission/absorption spectra of differentiated meteorites (achondrites) were measured to permit comparison with astronomical observations of dust in different stages of evolution of young stellar objects. In contrast to primitive chondrites, achondrites underwent heavy metamorphism and/or extensive melting and repre…
Evidence of an interaction from resolved stellar populations: the curious case of NGC 1313
Larsen, S. S.; Silva-Villa, E.
The galaxy NGC 1313 has attracted the attention of various studies due to the peculiar morphology observed in optical bands, although it is classified as a barred, late-type galaxy with no apparent close-by companions. However, the velocity field suggests an interaction with a satellite companion. Using resolved stellar populations, we study diffe…
Spectral analysis and geological mapping of the Daedalia Planum lava field (Mars) using OMEGA data
Massironi, M.; Giacomini, L.; Carli, C. +1 more
The great variety of morphologies observed in the Daedalia Planum lava flows (Mars) encouraged a detailed study of their spectral characteristics, in order to obtain information about lava composition and detect possible differences in the spectra of the flows. The OMEGA spectral data collected from the lava field appear rather similar, with absor…
Multiwavelength campaign on Mrk 509. IX. The Galactic foreground
Kaastra, J. S.; Kriss, G. A.; Costantini, E. +5 more
Context. The diffuse gas in and nearby the Milky Way plays an important role in the evolution of the entire Galaxy. It has a complex structure characterized by neutral, weakly and highly ionized gas.
Aims: We probe this gas through the observation of its absorption lines in the high-energy spectra of background sources.
Methods: We used …
Magnetic Flux Density Measured in Fast and Slow Solar Wind Streams
Balogh, A.; Erdős, G.
The radial component of the heliospheric magnetic field vector is used to estimate the open magnetic flux density of the Sun. This parameter has been calculated using observations from the Ulysses mission that covered heliolatitudes from 80°S to 80°N, from 1990 to 2009 and distances from 1 to 5.4 AU, the Advanced Composition Explorer mission at 1 …
Characterizing the limitations to the coupling between Saturn's ionosphere and middle magnetosphere
Ray, L. C.; Galand, M.; Fleshman, B. L. +1 more
Observations of Saturn's ultraviolet and infrared aurora show structures that, when traced along the planetary magnetic field, map to the inner, middle, and outer magnetosphere. From low to high latitudes the structures seen in the UV are the Enceladus footprint, which maps to an equatorial radius of 4 RS (Saturn radii); a diffuse emiss…
On the Edgeworth-Kuiper Belt dust flux to Saturn
Horányi, Mihály; Poppe, Andrew R.
Dust grains originating from the Edgeworth-Kuiper Belt (EKB) are believed to be the dominant species of dust in the outer solar system. These grains, evolving inward from the EKB under the influence of a variety of forces, will encounter the giant planets or their ring and moon systems. At Saturn, this influx drives several physical processes incl…
Herschel observations of a z∼ 2 stellar mass selected galaxy sample drawn from the GOODS NICMOS Survey
Berta, S.; Magnelli, B.; Nordon, R. +28 more
We present a study of the far-infrared (IR) properties of a stellar mass selected sample of 1.5 < z < 3 galaxies with log (M*/M⊙) > 9.5 drawn from the Great Observatories Origins Deep Survey (GOODS) Near Infrared Camera and Multi-Object Spectrometer (NICMOS) Survey (GNS), the deepest H-band Hubble Space Telescope sur…