Search Publications
Current Density and Wave Polarization Observed in Density Holes Upstream of Earth's Bow Shock
Dandouras, I.; Réme, H.; Lin, N. +5 more
Previous articles [1,2] have shown density holes are regions of density depletions below the solar wind level with scale length of an ion gyroradius. Density holes have steepened edges seen in both particles and fields. Here we present first observations of currents and wave polarizations associated with density holes. We show an example of curren…
Corrections to the Hipparcos Proper Motions in Declination for 807 Stars
Damljanovic, G.; Pejovic, N.
We used the data on latitude variations obtained from observations with 10 classical photographic zenith tubes (PZT) in order to improve the Hipparcos proper motions in declinations µ_{δ} for 807 stars. Part of observing programmes, carried out during the last century for the purpose of studying the Earth's rotation, were realized by using P…
Identification of the Exciting Source of CO Outflow in the Star-Formation Region GGD 12-15
Tamura, Motohide; Hashimoto, Jun; Kudo, Tomoyuki +10 more
We present results of near-infrared imaging polarimetry of the GGD 12-15 region with the IRSF 1.4m telescope and the SIRIUS camera/SIRPOL polarimeter and mid-infrared imaging with the AKARI telescope and the Infra-Red Camera (IRC). Two infrared sources, IRS9E and IRS9M near an H2O maser source situated on both sides around a VLA source …
Stellar subsystems of the galaxy NGC 2366
Tikhonov, N. A.; Galazutdinova, O. A.
Hubble Space Telescope archive data are used to perform photometry of stars in seven fields at the center and periphery of the galaxy NGC 2366. The variation of the number density of stars of various ages with galactocentric radius and along the minor axis of the galaxy are determined. The boundaries of the thin and thick disks of the galaxy are f…
Discovery and Interpretation of an X-Ray Period in the Galactic Center Source CXOGC J174536.1-285638
Muno, Michael P.; Eikenberry, Stephen S.; Bandyopadhyay, Reba M. +1 more
We present X-ray and infrared observations of the X-ray source CXOGC J174536.1-285638. Previous observations suggest that this source may be an accreting binary with a high-mass donor (HMXB) or a colliding wind binary (CWB). Based on the Chandra and XMM-Newton light curve, we have found an apparent 189 +/- 6 day periodicity with better than 99.997…
Discovery, photometry, and astrometry of 49 classical nova candidates in M 81 galaxy
Garnavich, P. M.; Thilker, D. A.; Hornoch, K. +2 more
Aims: This paper reports on a search for new classical nova candidates in the M 81 galaxy based on archival, as well as recent, new images.
Methods: We used images from 1999-2007 to search for optical transients in M 81. The positions of the identified classical nova candidates were used to study their spatial distribution. Kolmogorov-Smirnov …
IC 4406: A Radio-Infrared View
Hora, Joseph L.; Trigilio, Corrado; Cerrigone, Luciano +1 more
IC 4406 is a large (about 100'' × 30'') southern bipolar planetary nebula composed of two elongated lobes extending from a bright central region where there is evidence for the presence of a large torus of gas and dust. We show new observations of this source performed with IRAC (Spitzer Space Telescope) and the Australia Telescope Compact Array. …
SUBARU High-Dispersion Spectroscopy of Hα and [N II] 6583 Å Emission in the HH 46/47 Jet
Pyo, Tae-Soo; Takami, Michihiro; Hayashi, Masahiko +2 more
We present slit-scan observations of the Hα and [N II] 6583 Å emission lines toward the HH 46/47 jet with the Subaru Telescope. The spectral resolution of R = 3.6 × 104 allowed us to study the kinematics of individual features in unprecedented detail. The spectra show (1) the main jet component (VLSR ~ - 160 km s-1…
Reconnection in a slow Coronal Mass Ejection
Romoli, M.; Bemporad, A.; Landini, F. +1 more
This paper aims at studying reconnection occurring in the aftermath of the 28 May 2004, CME, first imaged by the LASCO (Large Angle and Spectrometric Coronagraph) C2 at 11:06 UT. The CME was observed in White Light and UV radiation: images acquired by the LASCO C2 and C3 coronagraphs and spectra acquired by UVCS (Ultraviolet Coronagraph Spectromet…
Heavy Element Analysis of X-Ray Faint Elliptical Galaxies
Fukazawa, Yasushi; Tozuka, Miyako
Past ASCA and ROSAT observations could not support the general view that elliptical galaxies are sources of metals in the intracluster medium, since observational results have shown that X-ray faint elliptical galaxies exhibit too low metal abundances of hot interstellar medium (ISM). We investigated the radial profiles of the temperature and abun…