Many black holes and neutron stars are thought to be hidden in the Milky Way. Since they don't emit visible light, or are covered by dust, only X-ray telescopes can find them.
China will soon launch its first X-ray space telescope, the Hard X-ray Modulation Telescope (HXMT), with the aim of surveying the Milky Way to observe celestial sources of X-rays.
"Our space telescope has unique capabilities to observe high-energy celestial bodies such as black holes and neutron stars. We hope to use it to resolve mysteries such as the evolution of black holes and the strong magnetic fields of neutron stars," says Zhang Shuangnan, lead scientist of HXMT and director of the Key Laboratory of Particle Astrophysics at the Chinese Academy of Sciences (CAS).
"We are looking forward to discovering new activities of black holes and studying the state of neutron stars under extreme gravity and density conditions, and the physical laws under extreme magnetic fields. These studies are expected to bring new breakthroughs in physics," says Zhang.
Compared with X-ray astronomical satellites of other countries, HXMT has larger detection area, broader energy range and wider field of view.
These give it advantages in observing black holes and neutron stars emitting bright X-rays, and it can more efficiently scan the galaxy, Zhang says.
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NY300 Asbestos Jointing Sheet for Oil-Resistance
NY300 Asbestos Jointing Sheet for Oil-Resistance
Description:NY300 Asbestos Jointing Sheet for Oil-Resistance is made by long asbestos fiber in high quality and oil resistant synthetic rubber as the main materials.
Usage:Suitable for the mediums of temperature under 300℃ and pressure under 3.0Mpa kerosene,mineral oil,plant oil,hot chemical solvent oil,etc transmitted in the joints of facilities and pipelines.
TEMP:300℃(max)
PRESS:3.0MPa(max)
Dimension:1540x1360mm(recommend)
4100×1500mm; 4500 x 1500mm;2000×1500mm;
1500×1500mm;1500×1000mm;1270×1300mm; 3810×1300mm
Thickness: 0.5~6.0mm
Technical data:
Lateral Tensile Strength MPa ≧12.7
Compressibility % 7~17
Recovery% ≧50
Density g/cm³ 1.6~2.0
Normal temperature softness No cracking
Oil Resistivity Test:
Immersion IRM903 Oil keeping 5h (149℃)
Lateral Tensile Strength(MPa) ≥ 9.0
Weigh gain rate(%) ≤30
Immersion ASTM Fuel Oil B keeping 5h(21-30℃)
thickening rate (%) 0~20
Oil sealing properties under normal Temperature
Medium:RH-75 Avgas
Pressure: 15Mpa No leaking keeping 30 minutes
Nitrogen Leakage Rate ML/(h•mm)≦300
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HEBEI HENGDA SEALING MATERIALS CO.,LTD. , https://www.hengdasealing.com