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北京理工大学关于李群SU(p,q)的Hasish-Chandra模的Gelfand-Kirillov维数取得研究成果（图）
北京理工大学 李群 SU(p,q) Hasish-Chandra模 Gelfand-Kirillov 维数
2020/2/21
日前，北理工数学与统计学院谢迅副研究员在国际数学顶级学术期刊《International Mathematics Research Notices》上发表题为“Gelfand–Kirillov Dimensions of Highest Weight Harish-Chandra Modules for SU(p,q)”的研究论文。该论文给出了SU(p,q)的具有最高权的单模的Gelfand-Ki...
A Chandra Observation of GRO J1744–28: The Bursting Pulsar in Quiescence
GRO J1744–28 neutron
2014/12/26
We present a Chandra/Advanced CCD Imaging Spectrometer I-array observation of GRO J1744-28. We detected a source at a position of R.A. = 17h44m33.s09, decl. = -28°44'270 (J2000.0; with a 1 σ error of ...
Chandra Observations of the Bursting X-Ray Transient SAX J1747.0–2853 during Low-Level Accretion Activity
SAX J1747.0–2853 stars
2014/12/26
We present Chandra/ACIS observations of the bursting X-ray transient SAX J1747.0-2853 performed on 2001 July 18. We detected a bright source at the position of R.A. = 17h47m02.s60 and decl. = -28°52'5...
Title: Chandra Observations of the Galactic Center and Nearby Edge-on Galaxies
Galactic Center Nearby Edge-on Galaxies
2014/12/26
I review our recent Chandra surveys of the center region of the Milky Way and other nearby edge-on galaxies. Our Galactic center survey provides an unprecedented high-resolution, broad-band X-ray pano...
I highlight results from Chandr observations of nearby galaxies, including the Milky Way. These observations have offered insights into old mysteries and indications of new high energy astrophysical p...
Chandra Observation of Supernova Remnant G54.1+0.3: A Close Cousin of the Crab Nebula
G54.1+0.3 jets and outfl ows
2014/12/26
We present a Chandra Advanced CCD Imaging Spectrometer observation of supernova remnant G54.1+0.3. This supernova remnant is resolved into several distinct X-ray-emitting components: a central bright ...
Chandra Observation of the Edge-on Galaxy NGC 3556 (M108): Violent Galactic Disk-Halo Interaction Revealed
NGC 3556 spiral
2014/12/26
We present a 60 ks Chandra ACIS-S observation of the isolated edge-on spiral galaxy NGC 3556, together with a multiwavelength analysis of various discrete X-ray sources and diffuse X-ray features. Amo...
The Chandra Detection of Galactic Center X-Ray Features G359.89−0.08 and G359.54+0.18
neutron supernova remnants
2014/12/24
We report the detection of two elongated X-ray features, G359.89-0.08 and G359.54+0.18, in the Galactic center (GC) region using the Chandra X-Ray Observatory. G359.89-0.08 is an elongated X-ray featu...
We present a 60 ks Chandra ACIS-S observation of the thermal composite supernova remnant 3C 391. The southeast-northwest elongated morphology is similar to that previously found in radio and X-ray stu...
Probing the Local Group Medium toward Markarian 421 with Chandra and the Far Ultraviolet Spectroscopic Explorer
halo intergalactic medium
2014/12/24
We report the detection of highly ionized gas at z ~ 0 seen in resonant UV and X-ray absorption lines toward the z = 0.03 blazar Mrk 421. A total of 13 X-ray and three UV lines were measured (or upper...
We present an X-ray study of our nearest starburst galaxy IC 10, based on XMM–Newton and Chandra observations. A list of 73 XMM–Newton and 28 Chandra detections of point-like X-ray sources in the fiel...
Highly clumpy structure of the thermal composite supernova remnant 3C 391 unveiled by Chandra
3C 391 (G31.9+0.0) ISM
2014/12/24
The nature of the internal thermal X-ray emission seen in “thermal composite” supernova remnants is still uncertain. Chandra observation of the 3C391 shows a southeast–northwest elongated morphology a...
Exploring the Nature of Weak Chandra Sources near the Galactic Centre
Accretion binaries X-rays
2014/12/24
We present results from the first near-IR imaging of the weak X-ray sources discovered in the Chandra/ACIS-I survey (Wang et al. 2002) towards the Galactic Centre (GC). These ~800 discrete sources, wh...
An infrared imaging survey of the faint Chandra sources near the Galactic Centre
stars mass loss
2014/12/24
We present near-infrared imaging of a sample of the faint, hard X-ray sources discovered in the 2001 Chandra Advanced CCD Imaging Spectrometer (ACIS)-I survey towards the Galactic Centre (GC) by Wang ...
Chandra Detection of Fe XVII in Absorption: Iron Abundance in the Hot Gaseous Interstellar Medium
4U 1820–303 abundances
2014/12/24
The iron depletion level and the gas-phase iron abundance in the hot (~106 K) interstellar medium (ISM) are critical to our understanding of its energy balance as well as the thermal sputtering, cooli...