Search Publications
PAndromeda—First Results from the High-cadence Monitoring of M31 with Pan-STARRS 1
Price, P. A.; Saglia, R. P.; Chambers, K. C. +19 more
The Pan-STARRS 1 (PS1) survey of M31 (PAndromeda) is designed to identify gravitational microlensing events, caused by bulge and disk stars (self-lensing) and by compact matter in the halos of M31 and the Milky Way (halo lensing or lensing by massive compact halo objects). With the 7 deg2 field of view (FOV) of PS1, the entire disk of M…
Valleys, paleolakes and possible shorelines at the Libya Montes/Isidis boundary: Implications for the hydrologic evolution of Mars
Poulet, F.; Jaumann, R.; Hiesinger, H. +5 more
We describe the results of our morphologic, stratigraphic and mineralogic investigations of fluvial landforms, paleolakes and possible shoreline morphologies at the Libya Montes/Isidis Planitia boundary. The landforms are indicative of aqueous activity and standing bodies of water, including lakes, seas and oceans, that are attributed to a complex…
AKARI near-infrared spectroscopy of the aromatic and aliphatic hydrocarbon emission features in the galactic superwind of M 82
Onaka, T.; Kaneda, H.; Minh, Y. C. +4 more
Aims: We investigate the properties of hydrocarbon grains in the galactic superwind of M 82.
Methods: With AKARI, we performed near-infrared (2.5-4.5 µm) spectroscopic observations of 34 regions in M 82 including its northern and southern halos.
Results: Many of the spectra show strong emission at 3.3 µm caused by polycy…
I Zw 18 as morphological paradigm for rapidly assembling high-z galaxies
Östlin, G.; Papaderos, P.
Context.
"TNOs are Cool": A survey of the trans-Neptunian region. VII. Size and surface characteristics of (90377) Sedna and 2010 EK139
Hartogh, P.; Pál, A.; Lellouch, E. +14 more
We present estimates of the basic physical properties (size and albedo) of (90377) Sedna, a prominent member of the detached trans-Neptunian object population and the recently discovered scattered disk object 2010 EK139, based on the recent observations acquired with the Herschel Space Observatory, within the "TNOs are Cool!" key progra…
Computing uncertainties in ionosphere-airglow models: II. The Martian airglow
Simon Wedlund, Cyril; Witasse, Olivier; Gronoff, Guillaume +3 more
One of the objectives of spectrometers onboard space missions is to retrieve atmospheric parameters (notably density, composition and temperature). To fulfill this objective, comparisons between observations and model results are necessary. Knowledge of these model uncertainties is therefore necessary, although usually not considered, to estimate …
Multiwavelength campaign on Mrk 509. X. Lower limit on the distance of the absorber from HST COS and STIS spectroscopy
Kaastra, J. S.; Kriss, G. A.; Arav, N. +15 more
Aims: Active galactic nuclei (AGN) often show evidence of photoionized outflows. A major uncertainty in models for these outflows is the distance (R) to the gas from the central black hole. In this paper we use the HST/COS data from a massive multi-wavelength monitoring campaign on the bright Seyfert I galaxy Mrk 509, in combination with arch…
A Multi-wavelength Investigation of RCW175: An H II Region Harboring Spinning Dust Emission
Alves, M. I. R.; Davies, R. D.; Davis, R. J. +13 more
Using infrared, radio continuum, and spectral observations, we performed a detailed investigation of the H II region RCW175. We determined that RCW175, which actually consists of two separate H II regions, G29.1-0.7 and G29.0-0.6, is located at a distance of 3.2 ± 0.2 kpc. Based on the observations we infer that the more compact G29.0-0.6 is less …
Data-Oriented Diagnostics of Pileup Effects on the Suzaku XIS
Dotani, Tadayasu; Katsuda, Satoru; Enoto, Teruaki +11 more
We present the results of a systematic study of pileup phenomena seen in the X-ray Imaging Spectrometer, an X-ray CCD instrument, onboard the Suzaku observatory. Using a data set of observed sources in a wide range of brightness and spectral hardness, we characterized the pileup fraction, spectral hardening, and grade migration as a function of th…
A Broadband Study of the Emission from the Composite Supernova Remnant MSH 11-62
Gelfand, Joseph D.; Temim, Tea; Hughes, John P. +10 more
MSH 11-62 (G291.0-0.1) is a composite supernova remnant for which radio and X-ray observations have identified the remnant shell as well as its central pulsar wind nebula. The observations suggest a relatively young system expanding into a low-density region. Here, we present a study of MSH 11-62 using observations with the Chandra, XMM -Newton, a…