搜索结果: 1-15 共查到“理学 Transients”相关记录17条 . 查询时间(0.093 秒)
A new population of X-ray transients in the Galactic Centre
X-ray transients the Galactic
2014/12/24
A comparison of the XMM-Newton and Chandra Galactic Centre (GC) Surveys has revealed two faint X-ray transients with contrasting properties. The X-ray spectrum of XMM J174544-2913.0 shows a strong iro...
We report the discovery in the Galactic Centre region of two hard X-ray sources, designated as XMM J174457−2850.3 and XMM J174544−2913.0, which exhibit flux variations in the 2–10 keV band...
X-ray Observations of Radio Transients without Optical Hosts
X-ray Observations Radio Transients without Optical Hosts
2011/10/19
We present a 50 ks Chandra ACIS-I X-ray observation of the Bower et al. VLA archival field. The observations reach a limiting sensitivity of ~1E-4 counts/s, corresponding to a flux of a few times 1E-1...
The energy source of intermediate luminosity optical transients
energy source intermediate luminosity optical transients
2011/10/10
We argue that transient systems with luminosity between novae and supernovae (SNe) are powered by gravitational energy of mass accreted onto, or a companion merges with, a main-sequence star. These tr...
The Allen Telescope Array Pi GHz Sky Survey II. Daily and Monthly Monitoring for Transients and Variability in the Bootes Field
Monthly Monitoring Transients Variability Bootes Field
2011/9/29
We present results from daily radio continuum observations of the Bootes field as part of the Pi GHz Sky Survey (PiGSS). These results are part of a systematic and unbiased campaign to characterize va...
Radio Properties of Rotating Radio Transients I: searches for periodicities and randomness in pulse arrival times
stars:neutron – pulsars: general – Galaxy: stellar content
2011/9/28
We have analysed the long- and short-term time dependence of the pulse arrival times and the pulse detection rates for eight Rotating Radio Transient (RRAT) sources from the Parkes Multi-beam Pulsar S...
XMM-Newton observations of the supergiant fast X-ray transients XTEJ1739-302, IGRJ08408-4503 and IGRJ18410-0535
XMM-Newton supergiant X-ray transients XTEJ1739-302 IGRJ08408-4503 IGRJ18410-0535
2011/9/26
We report here on the XMM-Newton observations of the three supergiant fast X-ray transients (SFXT) XTE J1739-302, IGRJ08408-4503, and IGRJ18410-0535. For the latter source we only discuss some prelimi...
XMM-Newton observations of the supergiant fast X-ray transients XTEJ1739-302, IGRJ08408-4503 and IGRJ18410-0535
XMM-Newton X-ray supergiant fast
2011/8/24
We report here on the XMM-Newton observations of the three supergiant fast X-ray transients (SFXT) XTE J1739-302, IGRJ08408-4503, and IGRJ18410-0535. For the latter source we only discuss some prelimi...
The Wide Field X-ray Telescope (WFXT) is a proposed mission with a high survey speed, due to the combination of large field of view (FOV) and effective area, i.e. grasp, and sharp PSF across the whole...
Orbital parameters of supergiant fast X-ray transients
X-rays binaries – Stars neutron – Stars supergiants – Accretion accretion disks
2010/11/15
Context. Super giant fast X-ray transient (SFXT) is a new class of the high mass X-ray binary that shows short X-ray flares. The physical mechanism of SFXT short flares is still open for discussion. T...
Common Powering Mechanism of Intermediate Luminosity Optical Transients and Luminous Blue Variables
winds outflows— stars mass loss— stars vari-ables other — supernovae general
2010/11/11
We study recent Intermediate Luminosity Optical Transients (ILOTs) and major eruptions of Luminous Blue Variables (LBVs), and strengthen claims for a similar powering mechanism. We study new ILOTs and...
Luminous Blue Variable eruptions and related transients: Diversity of progenitors and outburst properties
Solar and Stellar Astrophysics (astro-ph.SR) Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2011/1/7
We present new light curves and spectra for a number of extragalactic optical transients or "SN impostors" related to giant eruptions of LBVs, and we provide a comparative discussion of LBV-like giant...
Helioseismic Effects of Energetic Transients
Helioseismic effects solar activity solar transients
2010/9/15
Photospheric and chromospheric signatures related to large,energetic transients such as flares and CMEs, have been extensively reported during the last several years. In addition, energetic solar tran...
Ionospheric transients observed at mid-latitudes prior to earthquake activity in Central Italy
Ionospheric transients observed mid-latitudes prior earthquake activity Central Italy
2010/10/20
Ionograms from Rome (41.8N, 12.5E) and Sofia (42.4N, 23.2E) ionospheric stations during earthquake (EQ) activity with magnitude (M) between 5 and 6 in Central Italy are analyzed. It is found that seve...
Measuring the mass ratios of x-ray transients from the Rotational broadening of the secondary star s spectrum
mass ratios secondary star s spectrum x-ray transients
2009/6/17
Measuring the mass ratios of x-ray transients from the Rotational broadening of the secondary star s spectrum。