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VLT/FORS2 observations of the optical counterpart of the isolated neutron star RBS 1774
Haberl, F.; Motch, C.; Treves, A. +5 more
Context. The X-ray observations performed with the Röntgen Satellite (ROSAT) have led to the discovery of a group (seven to date) of X-ray dim and radio-silent, middle-aged isolated neutron stars (a.k.a. XDINSs), which are characterised by pure blackbody spectra (kT ≈ 40-100 eV) and long X-ray pulsations (P = 3-12 s), and appear to be endowed with…
An Overview of Saturn Narrowband Radio Emissions Observed by Cassini RPWS
Gurnett, D. A.; Kurth, W. S.; Wang, Z. +3 more
Saturn narrowband (NB) radio emissions are detected between 3 and 70 kHz, with occurrence probability and wave intensity peaking around 5 kHz and 20 kHz. The emissions usually occur periodically for several days after intensification of Saturn kilometric radiation (SKR). Originally detected by the Voyagers, the extended duration of the Cassini mis…
The emission line near 1319 Å in solar and stellar spectra
Jordan, C.
An emission line at ≃1319Å is one of the strongest unidentified lines in the ultraviolet spectra of cool dwarf stars. In most lists of solar and stellar lines it is identified as a transition in N I, although its intensity would then be anomalous and the wavelength does not precisely fit that expected for N I. The line is also observed in giant st…
A New Candidate of an X-Ray Luminous Cluster of Galaxies behind the Galactic Plane
Koyama, Katsuji; Bamba, Aya; Yamauchi, Shigeo
We present Suzaku results of an X-ray source, AX J185905
Mapping and analysis of a chain of channeled basins in the eastern rim region of Hellas basin, Mars
Korteniemi, J.; Kostama, V. -P.; Raitala, J. +2 more
The study is a detailed look on one of the several fluvial systems located on the eastern rim region of the Hellas basin on Mars. We analyzed the morphologic and morphometric characteristics of an extensive channel system, which extends for over 650 km from 35.8°S, 106.4°E in Hesperia Planum to Reull Vallis at 39.5°S, 98.1°E, and has a drainage ar…
HST-COS observations of the transiting extrasolar planetary system HD 209458b
France, Kevin; Stocke, John T.; Yang, Hao +2 more
We summarize results from deep spectroscopic observations of the HD 209458 planetary system, carried out with the Hubble SpaceTelescope—Cosmic Origins Spectrograph. Orbitally resolved observations are used to show that hot gas emission lines, arising only in the stellar atmosphere, are not variable, while lower ionizations species found in the upp…
Characteristics of Solar Meridional Flows
Basu, Sarbani; Antia, H. M.
We have done a ring-diagram analysis of MDI full-disc data to determine the properties of solar meridional flow in the outer 2% of the Sun over the solar cycle 23. The meridional flows show a migrating pattern with higher-velocity flows migrating toward the equator as activity increases. Additionally, we find that the migrating pattern of the meri…
Assessing spectral evidence of aqueous activity in two putative martian paleolakes
Roush, Ted L.; Gross, Christoph; Marzo, Giuseppe A. +4 more
We evaluate the evidence for the presence of mineral spectral signatures indicative of the past presence of water at two putative paleolakes on Mars using observations by the Mars Reconnaissance Orbiter (MRO) Compact Reconnaissance Image Spectrometer for Mars (CRISM). CRISM spectra of both sites are consistent with laboratory spectra of Mg-rich ph…
The effect of environment on star forming galaxies at redshift 1 First insight from PACS (Corrigendum)
Berta, S.; Magnelli, B.; Nordon, R. +33 more
Multiple Absorption-line Spectroscopy of the Intergalactic Medium. I. Model
Shull, J. Michael; Danforth, Charles W.; Stocke, John T. +2 more
We present a physically based absorption-line model for the spectroscopic study of the intergalactic medium (IGM). This model adopts results from Cloudy simulations and theoretical calculations by Gnat & Sternberg to examine the resulting observational signatures of the absorbing gas with the following ionization scenarios: collisional ionizat…