Search Publications
PDS 144: The First Confirmed Herbig Ae-Herbig Ae Wide Binary
Holtzman, J. A.; Hamaguchi, K.; Grogin, N. A. +13 more
PDS 144 is a pair of Herbig Ae stars that are separated by 5farcs35 on the sky. It has previously been shown to have an A2Ve Herbig Ae star viewed at 83° inclination as its northern member and an A5Ve Herbig Ae star as its southern member. Direct imagery revealed a disk occulting PDS 144 N—the first edge-on disk observed around a Herbig Ae star. T…
A cross-correlation method for measuring line formation heights in the solar photosphere
Faurobert, M.; Ricort, G.; Aime, C.
Context. Detailed 3D-simulations of magneto-convection in the solar photosphere are now available. They intend to capture the main physical mechanisms at play in this boundary layer, where complex physical phenomena, such as convective overshooting and small scale magnetic dynamo take place. But numerical limitations in spatial resolution and in b…
High angular resolution near-infrared integral field observations of young star cluster complexes in NGC 1365
Alloin, D.; Galliano, E.; Kissler-Patig, M. +1 more
This paper presents and examines new near-infrared integral field observations of the three so-called "embedded star clusters" located in the nuclear region of NGC 1365. Adaptive-optics-corrected K-band data cubes were obtained with the ESO/VLT instrument SINFONI. The continuum in the K-band and emission lines such as He I, Brγ, and several H…
Observations of Post-flare Plasma Dynamics during an M1.0 Flare in AR11093 by the Solar Dynamics Observatory/Atmospheric Imaging Assembly
Murawski, K.; Srivastava, Abhishek K.
We observe the motion of cool and hot plasma in a multi-stranded post-flare loop (PFL) system that evolved in the decay phase of a two-ribbon M1.0 class flare in AR 11093 on 2010 August 7 using the Solar Dynamics Observatory/Atmospheric Imaging Assembly 304 Å and 171 Å filters. The moving intensity feature and its reflected counterpart are observe…
Observations of the post-shock break-out emission of SN 2011dh with XMM-Newton
Ducci, L.; Sasaki, M.
Context. After the occurrence of the type cIIb SN 2011dh in the nearby spiral galaxy M 51 numerous observations were performed with different telescopes in various bands ranging from radio to γ-rays.
Aims: We analysed the XMM-Newton and Swift observations taken 3 to 30 days after the SN explosion to study the X-ray spectrum of SN 2011dh.
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XMM-Newton EPIC and OM observation of Nova Centauri 1986 (V842 Cen)
Luna, G. J. M.; Brickhouse, N. S.; Diaz, M. P. +1 more
We report the results from the temporal and spectral analysis of an XMM-Newton observation of Nova Centauri 1986 (V842 Cen). We detect a period at 3.51 ± 0.4 h in the EPIC data and at 4.0 ± 0.8 h in the Optical Monitor (OM) data. The X-ray spectrum is consistent with the emission from an absorbed thin thermal plasma with a temperature distribution…
Chandra grating spectroscopy of three hot white dwarfs
Rauch, T.; Werner, K.; Kruk, J. W. +3 more
Context. High-resolution soft X-ray spectroscopic observations of single hot white dwarfs are scarce. With the Chandra Low-Energy Transmission Grating, we have observed two white dwarfs, one is of spectral type DA (
Observation of DCl and upper limit to NH3 on Venus
Krasnopolsky, Vladimir
To search for DCl in the Venus atmosphere, a spectrum near the D35Cl (1-0) R4 line at 2141.54 cm-1 was observed using the CSHELL spectrograph at NASA IRTF. Least square fitting to the spectrum by a synthetic spectrum results in a DCl mixing ratio of 17.8 ± 6.8 ppb. Comparing to the HCl abundance of 400 ± 30 ppb (Krasnopolsky …
Spatial dependence of banded chorus intensity near the magnetic equator
Pickett, J. S.; Inan, U. S.; Bell, T. F. +1 more
Data from 12 different Cluster orbits containing banded chorus emissions, with observations from 22 different events spread across the four Cluster spacecraft, are used to show the spatial dependence of banded chorus intensity near the magnetic equator under conditions of moderate magnetic disturbance (Kp ≤ 5). The intensities for upper…
Interaction and eruption of two filaments observed by Hinode, SOHO, and STEREO
Li, Ying; Ding, Ming-De
We investigate the interaction between two filaments and the subsequent filament eruption event observed from different viewing angles by Hinode, the Solar and Heliospheric Observatory, and the Solar Terrestrial Relations Observatory. In the event, the two filaments rose high, interacted with each other, and finally were ejected along two differen…