Search Publications
Herschel/HIFI observations of spectrally resolved methylidyne signatures toward the high-mass star-forming core NGC 6334I
Falgarone, E.; Maret, S.; Henning, T. +65 more
Context. In contrast to the more extensively studied dense star-forming cores, little is known about diffuse gas surrounding star-forming regions.
Aims: We study the molecular gas in the Galactic high-mass star-forming region NGC 6334I, which contains diffuse, quiescent components that are inconspicuous in widely used molecular tracers such a…
Searching for Compact Objects in SNRs G27.8+0.6 and G28.8+1.5
Pavlov, George G.; Kargaltsev, Oleg; Misanovic, Zdenka
We analyzed XMM-Newton observations of two center-filled supernova remnants (SNRs), G27.8+0.6 and G28.8+1.5, to search for pulsars/pulsar wind nebulae (PWNe) and other types of neutron stars (NSs) associated with these remnants. We discovered a PWN candidate within the extent of the centrally peaked radio emission of G27.8+0.6. The X-ray morpholog…
Particle Acceleration in the Expanding Blast Wave of η Carina's Great Eruption of 1843
Hinton, J. A.; Domainko, W.; Ohm, S.
Non-thermal hard X-ray and high-energy (HE; 1 MeV <= E <= 100 GeV) γ-ray emission in the direction of η Carina has been recently detected using the INTEGRAL, AGILE, and Fermi satellites. So far this emission has been interpreted in the framework of particle acceleration in the colliding wind region between the two massive stars. However, the…
UCAC3 Proper Motion Survey. I. Discovery of New Proper Motion Stars in UCAC3 with 0farcs40 yr-1 > µ >= 0farcs18 yr-1 Between Declinations -90° and -47°
Henry, Todd J.; Finch, Charlie T.; Zacharias, Norbert
This paper presents 442 new proper motion stellar systems in the southern sky between declinations -90° and -47° with 0farcs40 yr-1 > µ >= 0farcs18 yr-1. These systems constitute a 25.3% increase in new systems for the same region of the sky covered by previous SuperCOSMOS RECONS (SCR) searches that used Schmidt p…
The low-redshift Lyα forest towards 3C 273
Tripp, Todd M.; Jenkins, Edward B.; Sembach, Kenneth R. +6 more
We present an analysis of the Lyα forest towards 3C 273 from the Space Telescope Imaging Spectrograph at ~7kms-1 resolution, along with reprocessed data from the Far Ultraviolet Spectroscopic Explorer. The high ultraviolet flux of 3C 273 allows us to probe the weak, low-z absorbers. The main sample consists of 21 HI absorbers that we co…
Magnetic Non-potentiality of Solar Active Regions and Peak X-ray Flux of the Associated Flares
Gosain, Sanjay; Tiwari, Sanjiv Kumar; Venkatakrishnan, P.
Predicting the severity of solar eruptive phenomena such as flares and coronal mass ejections remains a great challenge despite concerted efforts to do so over the past several decades. However, the advent of high-quality vector magnetograms obtained from Hinode (SOT/SP) has increased the possibility of meeting this challenge. In particular, the s…
Oxygen energization by localized perpendicular electric fields at the cusp boundary
Waara, M.; Nilsson, H.; André, M. +3 more
We report Cluster observations of oxygen energization by several keV at the boundary between the high latitude cusp and lobe. A localized electric field at the cusp/lobe boundary is responsible for a significant part of the observed energization. Such electric fields can be related to the separatrix region of reconnection at the magnetopause. Ions…
Ultraviolet and visible photometry of asteroid (21) Lutetia using the Hubble Space Telescope
Stern, S. A.; Feldman, P. D.; A'Hearn, M. F. +10 more
Context. The asteroid (21) Lutetia is the target of a planned close encounter by the Rosetta spacecraft in July 2010. To prepare for that flyby, Lutetia has been extensively observed by a variety of astronomical facilities.
Aims: We used the Hubble Space Telescope (HST) to determine the albedo of Lutetia over a wide wavelength range, extendin…
Herschel-SPIRE spectroscopy of G29.96-0.02: Fitting the full SED
Miville-Deschênes, M. -A.; Boulanger, F.; Abergel, A. +42 more
We use the SPIRE Fourier-transform spectrometer (FTS) on-board the ESA Herschel Space Observatory to analyse the submillimetre spectrum of the Ultra-compact HII region G29.96-0.02. Spectral lines from species including 13CO, CO, [CI], and [NII] are detected. A sparse map of the [NII] emission shows at least one other HII region neighbou…
Propagation of a sausage soliton in the solar lower atmosphere observed by Hinode/SOT
Khodachenko, M. L.; Zaqarashvili, T. V.; Kukhianidze, V.
Acoustic waves and pulses propagating from the solar photosphere upwards may quickly develop into shocks due to the rapid decrease of atmospheric density. However, if they propagate along a magnetic flux tube, then the non-linear steepening may be balanced by tube dispersion effects. This may result in the formation of a sausage soliton. The aim o…