Search Publications
Cyclical Behavior of Coronal Mass Ejections
Li, K. J.; Gao, P. X.; Li, Q. X. +2 more
With the use of coronal mass ejections (CMEs) observed by the Large Angle and Spectrometric Coronagraph (LASCO) onboard the Solar and Heliospheric Observatory (SOHO) from January 1996 through December 2005, it is found that, for the cyclical activity of CMEs, there is surprisingly no equatorward drift at low latitudes (thus, no "butterfly diagram"…
Suzaku Observations across the Cygnus Loop from the Northeastern to the Southwestern Rim
Katsuda, Satoru; Uchida, Hiroyuki; Tsunemi, Hiroshi +1 more
We have observed the Cygnus Loop from the northeast (NE) rim to the southwest (SW) rim using Suzaku in 10 pointings just north of previous XMM-Newton observations. The observation data obtained were divided into 45 rectangular regions where the width was configured so that each region would hold 8000-12000photons. The spectrum acquired from each r…
AKARI Near- and Mid-Infrared Spectroscopy of APM 08279+5255 at z = 3.91
Kawara, K.; Ohyama, Y.; Oyabu, S. +4 more
We present rest-frame optical/near-infrared spectra of the gravitationally lensed quasar APM 08279+5255 at z = 3.91 that has been taken using the Infrared Camera (IRC) onboard the AKARI infrared satellite. The observed continuum consists of two components; a power-law component dominating optical wavelengths which is the direct light from the cent…
Gemini 3D spectroscopy of BAL+IR+FeII QSOs - II. IRAS 04505-2958, an explosive QSO with hypershells and a new scenario for galaxy formation and galaxy end phase
Taniguchi, Y.; Zheng, W.; Terlevich, R. +8 more
From a study of broad absorption line (BAL) + infrared (IR) + FeII quasi-stellar objects (QSOs) [using deep Gemini Multi-Object Spectrograph Integral Field Unit (GMOS-IFU) spectroscopy], new results are presented for IRAS 04505-2958. Specifically, we have studied in detail the outflow (OF) process at two large galactic scales: (i) two blobs/shells…
Deep 15µm AKARI Observations in the CDFS: Estimating Dust Luminosities for a MIR-Selected Sample and for Lyman Break Galaxies and the Evolution of Ldust/LUV with the Redshift
Buat, Véronique; Burgarella, Denis; Pearson, Chris +2 more
Deep observations of the Chandra Deep Field South have been secured at 15µm with AKARI/IRC infrared space telescope. From these observations, we define a sample of mid infrared-selected galaxies at 15µm and we also obtain 15µm flux densities for a sample of Lyman Break Galaxies at z ∼ 1 already observed at 24µm with Spitzer…
On the identification of the Fermi/LAT source 0FGL J2001.0+4352 with a BL Lac
Masetti, N.; Ubertini, P.; Parisi, P. +3 more
We report on the identification of the gamma-ray source 0FGL J20001.0+4352 listed in the Fermi bright source catalogue. This object, which has an observed 1-100 GeV flux of (7.8 +/- 1.2) × 10-9phcm-2s-1 and is located close to the Galactic plane, is not associated with any previously known high-energy source. We us…
An HST/WFPC Survey of Bright Young Clusters in M31. II. Photometry of Less Luminous Clusters in the Fields
Barmby, P.; Bellazzini, M.; Perina, S. +5 more
We report on the properties of 89 low-mass star clusters located in the vicinity of luminous young clusters ("blue globulars") in the disk of M31. Eighty-two of the clusters are newly detected. We have determined their integrated magnitudes and colors, based on a series of Hubble Space Telescope (HST)/Wide Field Planetary Camera 2 exposures in blu…
HR 8257: A Three-Dimensional Orbit and Basic Properties
Torres, Guillermo; Fekel, Francis C.; Boden, Andrew F. +1 more
We have used interferometric and spectroscopic observations of HR 8257 to determine a three-dimensional orbit of the system. The orbit has a period of 12.21345 days and an eccentricity of 0.2895. The masses of the F0 and F2 dwarf components are 1.56 and 1.38 M sun, respectively, with fractional errors of 1.4%. Our orbital parallax of 13…
Kinematics of Tycho-2 red giant clump stars
Bobylev, V. V.; Bajkova, A. T.; Gontcharov, G. A. +1 more
Based on the Ogorodnikov-Milne model, we analyze the proper motions of 95,633 red giant clump (RGC) stars from the Tycho-2 Catalogue. The following Oort constants have been found: A = 15.9 ± 0.2 km s-1 kpc-1 and B = -12.0±0.2 km s-1 kpc-1. Using 3632 RGC stars with known proper motions, radial velocities, and photometric distances, we show that, a…
Metal-Enriched Outflows in the Ultraluminous Infrared Quasar Q1321+058
Yuan, Weimin; Zhou, Hongyan; Wang, Tinggui +3 more
Quasar outflows may play important role in the evolution of its host galaxy and central black hole, and are most often studied in absorption lines. In this paper, we present a detailed study of multiple outflows in the obscured ultraluminous infrared quasar Q1321+058. The outflows reveal themselves in the complex optical and ultraviolet (UV) emiss…