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Thermal structure of Venus' nightside mesosphere as observed by infrared heterodyne spectroscopy at 10 µm
Sonnabend, Guido; Sornig, Manuela; Stangier, Tobias +4 more
Ground-based heterodyne spectroscopy is used to observe the night side of Venus by probing single pressure broadened CO2 absorption lines. From the pressure induced line broadening, the predominant temperature at different altitude layers can be deduced. It is found, that heterodyne spectroscopy is sensitive to probe the mesosphere betw…
Herschel Far-IR Observations of the Giant H II Region NGC 3603
Paresce, Francesco; Correnti, Matteo; Di Cecco, Alessandra +2 more
We observed the giant H II region around the NGC 3603 YC with the five broad bands (70, 160, 250, 350, 500 µm) of the SPIRE and PACS instruments, on board the Herschel Space Observatory. Together with what is currently known of the stellar, atomic, molecular, and warm dust components, this additional and crucial information should allow us t…
Ultraviolet/X-ray Variability and the Extended X-ray Emission of the Radio-loud Broad Absorption Line Quasar PG 1004+130
Brandt, W. N.; Luo, B.; Gallagher, S. C. +2 more
We present the results of recent Chandra, XMM-Newton, and Hubble Space Telescope observations of the radio-loud (RL), broad absorption line (BAL) quasar PG 1004+130. We compare our new observations to archival X-ray and UV data, creating the most comprehensive, high signal-to-noise, multi-epoch, spectral monitoring campaign of a RL BAL quasar to d…
The Identification of Extreme Asymptotic Giant Branch Stars and Red Supergiants in M33 With 24 µm Variability
Clayton, Geoffrey C.; Engelbracht, Charles W.; Srinivasan, Sundar +2 more
We present the first detection of 24 µm variability in 24 sources in the Local Group galaxy M33. These results are based on 4 epochs of Multiband Imaging Photometer for Spitzer observations, which are irregularly spaced over ∼ 750 days. We find that these sources are constrained exclusively to the Holmberg radius of the galaxy, which increas…
Deep Chandra observations of the NGC 4472 globular cluster black hole XMMU 122939.7+075333: short-term variability from the first globular cluster black hole binary
Maccarone, T. J.; Sivakoff, G. R.; Kraft, R. P. +1 more
In this paper, we discuss the luminosity modulations and spectral analysis results of the recent deep observations of XMMU 122939.7+075333, the first black hole discovered in a globular cluster. The source has been detected many times, typically with LX > 1039 erg s-1, but in a 2010 observation had faded to L
Intermittency of magnetic field turbulence: Astrophysical applications of in-situ observations
Zelenyi, Lev M.; Artemyev, Anton V.; Bykov, Andrei M. +1 more
We briefly review some aspects of magnetic turbulence intermittency observed in space plasmas. Deviation of statistical characteristics of a system (e.g. its high statistical momenta) from the Gaussian can manifest itself as domination of rare large intensity peaks often associated with the intermittency in the system's dynamics. Thirty years ago,…
Extremely Bright Submillimeter Galaxies beyond the Lupus-I Star-forming Region
Yun, M. S.; Wilner, D. J.; Shimajiri, Y. +25 more
We report detections of two candidate distant submillimeter galaxies (SMGs), MM J154506.4-344318 and MM J154132.7-350320, which are discovered in the AzTEC/ASTE 1.1 mm survey toward the Lupus-I star-forming region. The two objects have 1.1 mm flux densities of 43.9 and 27.1 mJy, and have Herschel/SPIRE counterparts as well. The Submillimeter Array…
Comment on "Magnetic phase structure of Saturn's 10.7 h oscillations" by Yates et al.
Andrews, D. J.; Cowley, S. W. H.; Provan, G.
The extreme ultraviolet spectrum of the kinetically dominated quasar 3C 270.1
Punsly, Brian; Marziani, Paola
Only a handful of quasars have been identified as kinetically dominated, their long-term time-averaged jet power, overline{Q}, exceeds the bolometric thermal emission, Lbol, associated with the accretion flow. This Letter presents the first extreme ultraviolet (EUV) spectrum of a kinetically dominated quasar, 3C 270.1. The EUV continuum…
Planetary science: Sink holes and dust jets on comet 67P
Weissman, Paul
Analyses of images taken by the Rosetta spacecraft reveal the complex landscape of a comet in rich detail. Close-up views of the surface indicate that some dust jets are being emitted from active pits undergoing sublimation. See Letter p.63