Search Publications

The morphology of the Anomalous Microwave Emission in the Planck 2015 data release

Liu, Hao; von Hausegger, Sebastian

We calculate weighted mosaic correlations between the recently published Planck 2015 foreground maps- both anomalous microwave emission (AME) maps, free-free emission, synchrotron radiation and thermal dust emission. The weighting coefficients are constructed taking account of the signal-to-error ratio given by the data product. Positive correlati…

A coronal wave and an asymmetric eruptive filament in SUMER, CDS, EIT, and TRACE co-observations

Doyle, J. G.; Madjarska, M. S.; Shetye, J.

Context. The investigation covers the complex subject of coronal waves and the phenomena contributing to and/or causing their formation.
Aims: The objectives of the present study is to provide a better physical understanding of the complex inter-relation and evolution of several solar coronal features comprising a double-peak flare, a coronal…

Erratum: “The Herschel Inventory of the Agents of Galaxy Evolution (Heritage) in the Magellanic Clouds, a Herschel Open Time Key Program” (2013, AJ, 146, 62)

Poglitsch, A.; van Loon, J. Th.; Bernard, J. -P. +52 more

Solar extreme ultraviolet variability of the quiet Sun

Solanki, S. K.; Teriaca, L.; Shakeri, F.

The last solar minimum has been unusually quiet compared to the previous minima (since space-based radiometric measurements are available). The Sun's magnetic flux was substantially lower during this minimum. Some studies also show that the total solar irradiance during the minimum after cycle 23 may have dropped below the values known from the tw…

XMM-Newton RGS observations of the Cat's Eye Nebula

Gruendl, R. A.; Chu, Y. -H.; Guerrero, M. A. +1 more

We present an analysis of XMM-Newton Reflection Grating Spectrometer (RGS) observations of the planetary nebula (PN) NGC 6543. These observations render it the second PN with high-resolution X-ray spectroscopic observations after BD +30°3639. The observations consist of 26 pointings, 14 of which included RGS observations for a total integration ti…

Physics of outflows near solar active regions

Price, D. J.; Taroyan, Y.

Hinode/EIS observations have revealed outflows near active regions which remain unexplained. An outflow region observed by the EUV Imaging Spectrometer (EIS) that appears slightly redshifted at low temperatures and blueshifted at higher temperatures is presented. We conduct simulations and use those to create synthetic line profiles in order to re…

Mab's orbital motion explained

Showalter, M. R.; de Pater, I.; Kumar, K.

We explored the hypothesis that Mab's anomalous orbital motion, as deduced from Hubble Space Telescope (HST) data (Showalter, M.R., Lissauer, J.J. [2006]. Science (New York, NY) 311, 973-977), is the result of gravitational interactions with a putative suite of large bodies in the µ-ring. We conducted simulations to compute the gravitational…

Environmental dependence of polycyclic aromatic hydrocarbon emission at z ~ 0.8. Investigation by observing RX J0152.7-1357 with AKARI

Koyama, Yusei; Kodama, Tadayuki; Matsuhara, Hideo +2 more

We study the environmental dependence of the strength of polycyclic aromatic hydrocarbon (PAH) emission using AKARI observations of RX J0152.7-1357, a galaxy cluster at z = 0.84. PAH emission reflects the physical conditions of galaxies and dominates 8 µm luminosity (L8), which can be directly measured with the L15 band of AKARI. The ratio o…

Determining the nature of faint X-ray sources from the ASCA Galactic center survey

Bikmaev, I. F.; Tsygankov, S. S.; Lutovinov, A. A. +6 more

We present the results of the the identification of six objects from the ASCA Galactic center and Galactic plane surveys: AX J173548-3207, AX J173628-3141, AX J1739.5-2910, AX J1740.4-2856, AX J1740.5-2937, and AX J1743.9-2846. Chandra, XMM-Newton, and XRT/Swift X-ray data have been used to improve the positions of the optical counterparts to thes…

Gamma rays from a supernova of type Ia: SN2014J

Diehl, R.

SN2014J is the closest supernova of type Ia that occurred in the last 40 years. This provides an opportunity for unprecedented observational detail and coverage in many astronomical bands, which will help to better understand the still unknown astrophysics of these supernovae. For the first time, such an event occurs sufficiently nearby so that al…