Search Publications
On the detectability of CO molecules in the interstellar medium via X-ray spectroscopy
García, Javier A.; Kallman, Timothy R.; Gatuzz, Efraín +1 more
We present a study of the detectability of CO molecules in the Galactic interstellar medium using high-resolution X-ray spectra obtained with the XMM-Newton Reflection Grating Spectrometer. We analysed 10 bright low mass X-ray binaries (LMXBs) to study the CO contribution in their line of sights. A total of 25 observations were fitted with the <…
The morphology of the topside ionosphere of Mars under different solar wind conditions: Results of a multi-instrument observing campaign by Mars Express in 2010
Fränz, M.; Pätzold, M.; Wild, J. A. +17 more
Since the internally-generated magnetic field of Mars is weak, strong coupling is expected between the solar wind, planetary magnetosphere, and planetary ionosphere. However, few previous observational studies of this coupling incorporated data that extended from the solar wind to deep into the ionosphere. Here we use solar wind, magnetosphere, an…
The mass-loss rates of red supergiants at low metallicity: detection of rotational CO emission from two red supergiants in the Large Magellanic Cloud
Matsuura, Mikako; Barlow, M. J.; Meixner, Margaret +9 more
Using the PACS and SPIRE spectrometers on-board the Herschel Space Observatory, we obtained spectra of two red supergiants (RSGs) in the Large Magellanic Cloud (LMC). Multiple rotational CO emission lines (J = 6-5 to 15-14) and 15 H2O lines were detected from IRAS 05280-6910, and one CO line was detected from WOH G64. This is the first …
Modeling the magnetospheric X-ray emission from solar wind charge exchange with verification from XMM-Newton observations
Palmroth, Minna; Milan, Steve E.; Carter, Jennifer A. +3 more
An MHD-based model of terrestrial solar wind charge exchange (SWCX) is created and compared to 19 case study observations in the 0.5-0.7 keV emission band taken from the European Photon Imaging Cameras on board XMM-Newton. This model incorporates the Global Unified Magnetosphere-Ionosphere Coupling Simulation-4 MHD code and produces an X-ray emiss…
Cassini plasma observations of Saturn's magnetospheric cusp
Coates, Andrew J.; Krupp, Norbert; Arridge, Christopher S. +6 more
The magnetospheric cusp is a funnel-shaped region where shocked solar wind plasma is able to enter the high-latitude magnetosphere via the process of magnetic reconnection. The plasma observations include various cusp signatures such as ion energy dispersions and diamagnetic effects. We present an overview analysis of cusp plasma observations at t…
Suzaku study on the ejecta of the supernova remnant G272.2-3.2
Katsuda, Satoru; Koyama, Katsuji; Uchida, Hiroyuki +5 more
We report reanalyses of the Suzaku observations of the Galactic supernova remnant (SNR) G272.2-3.2, for which previous studies were limited below 3 keV. With careful data reduction and background subtraction, we discover the K-shell lines of Ar, Ca, and Fe above 3 keV. The X-ray spectrum of G272.2-3.2 consists of two components, a low-temperature …
Detection of H I in Emission in the LYα Emitting Galaxy Haro 11
Cannon, John M.; Hayes, Matthew; Östlin, Göran +2 more
We present the first robust detection of H I 21 cm emission in the blue compact galaxy Haro 11 using the 100 m Robert C. Byrd Green Bank Telescope (GBT). Haro 11 is a luminous blue compact galaxy with emission in both Lyα and the Lyman continuum. We detect (5.1 ± 0.7 × 108) M ⊙ of H I gas at an assumed distance of 88 Mpc, mak…
Chandrayaan-2 dual-frequency SAR: Further investigation into lunar water and regolith
Das, Anup; Putrevu, Deepak; Vachhani, J. G. +2 more
The Space Applications Centre (SAC), one of the major centers of the Indian Space Research Organization (ISRO), is developing a high resolution, dual-frequency Synthetic Aperture Radar as a science payload on Chandrayaan-2, ISRO's second moon mission. With this instrument, ISRO aims to further the ongoing studies of the data from S-band MiniSAR on…
Herschel/HIFI observations of the circumstellar ammonia lines in IRC+10216
Menten, K. M.; Olofsson, H.; Marston, A. P. +14 more
Context. A discrepancy exists between the abundance of ammonia (NH3) derived previously for the circumstellar envelope (CSE) of
Aims: To address the discrepancy described above…
A Search for O2 in CO-depleted Molecular Cloud Cores with Herschel
Ceccarelli, Cecilia; Charnley, Steven B.; Cordiner, Martin A. +1 more
The general lack of molecular oxygen in molecular clouds is an outstanding problem in astrochemistry. Extensive searches with the Submillimeter Astronomical Satellite, Odin, and Herschel have only produced two detections; upper limits to the O2 abundance in the remaining sources observed are about 1000 times lower than predicted by chem…