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宝瓶座CY星和麒麟座BE星的光电观测

天文学报 1960年第1期 50-59页

作者：德特列张钰哲布达佩斯天文台紫金山天文台

用紫金山天文台的60厘米反光望远镜和1P21光电倍增管所构成的光电光度计,我们在1959年底和1960年初,对 CY Aqr 及 BE Mon 进行了测光观测.得到 CY Aqr 的五条完整的光变曲线.我们采用了从1934年到现在的29个观测所得的极大历元来和公式... 详细信息

用紫金山天文台的60厘米反光望远镜和1P21光电倍增管所构成的光电光度计,我们在1959年底和1960年初,对 CY Aqr 及 BE Mon 进行了测光观测.得到 CY Aqr 的五条完整的光变曲线.我们采用了从1934年到现在的29个观测所得的极大历元来和公式计算的相比较.若不承认历元有跃迁的可能,那末任何线性公式,都难以满足这些观测数据的要求.我们按周期随时缩短的假设,得出下列比较满意的公式:Max⊙=I.D.2427658.4079十0d.061038576E—(0d.742×10-12)E2.用前后将近两个月观测 BE Mon 所获得的数据,我们得到了这颗造父变星的光变曲线.变星总表引用所定0d.421的周期是不正确的.根据我们观测所得到的周期是2d.704.按这周期来整理于1935年所完成的目视观测,我们也得出了一个很象样的光变曲线.

关键词：麒麟座光电观测 CY 宝瓶座光变曲线紫金山天文台 BE

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人造卫星的轨道问题

天文学报 1957年第2期 196-221页

作者：张钰哲张家祥中国科学院紫金山天文台

绪言在国际地球物理年期间(1957Ⅶ—1958Ⅻ)苏联和美国都决定要放出一些人造卫星,来扩大由于放射火箭所已获得的高空探测的成果.有的人造卫星,将携带着无线电发报的设备,自动的把在高空探测所得的数据,随时播送到地面来.但仅仅从人造卫... 详细信息

绪言在国际地球物理年期间(1957Ⅶ—1958Ⅻ)苏联和美国都决定要放出一些人造卫星,来扩大由于放射火箭所已获得的高空探测的成果.有的人造卫星,将携带着无线电发报的设备,自动的把在高空探测所得的数据,随时播送到地面来.但仅仅从人造卫星的运动和位置的观测,我们也能够对于高空大气的密度和地球形状及其质量的分布,作出些结论来.因此我们有需要从已有的地球形状和大气密度的初步知识,来进行人

关键词：衡星张家祥偏心率日数势函数位函数扁球形密度公式

The investigation of the Neupert effect in two solar flares

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Science China(Physics,Mechanics & Astronomy) 2009年第11期52卷 1686-1690页

作者： NING ZongJun purple mountain observatory, Nanjing 210008, China purple mountain observatory Nanjing 210008 China

The Neupert effect suggests a flare model in which the nonthermal emissions are produced by energetic electrons which heat lower corona and chromosphere to produce the thermal emissions. Based on this concept, we investigate the Neupert effect to test the correlation between the hard X-ray spectral index and the time rate of the UV flare area at 1600 or 171 . Using the T RACE and RHESSI observations, we explore these quantities for two solar flares, one on March 14, 2002 and the other on November 1, 2003. The negative dependence between the spectral index and the time rate of the UV flare area is found, especially during the hard X-ray sub-peaks. This finding indicates that the electron-beam-driven heating plays a prominent role in the UV emission of these two flares.

关键词： solar flares UV radiation X-rays

The simulation of GCRs at near earth interplanetary locations for radioprotection

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Science China(Physics,Mechanics & Astronomy) 2010年第9期53卷 1739-1745页

作者： BAO Gang purple mountain observatory,Chinese Academy of Sciences,Nanjing 210008,China 1. purple mountain observatory Chinese Academy of Sciences Nanjing 210008 China

The interplanetary radiation environment is detrimental to space missions,giving rise to cumulative damage to both astronauts and payloads and enhanced background levels in ***,there is a pressing need for a reliable simulation of these harmful effects for risk assessment and shielding optimization in manned space *** have modeled the interaction processes of the two most abundant galactic cosmic ray particle fluxes(protons and helium nuclei) using the Geant4 toolkit for a given space vehicle *** total energy deposited due to protons and helium nuclei is calculated in this work,and the energy deposited due to the secondary particles generated by this radiation is also estimated.

关键词： radioprotection simulation Geant4 cosmic rays

Near-Infrared Observations of the Massive Star Forming Region IRAS 23151+5912

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Chinese Journal of Astronomy and Astrophysics 2004年第3期4卷 284-298页

作者： Xue-Peng Chen Yong-Qiang Yao purple mountain observatory Chinese Academy of Sciences, Nanjing 210008 purple mountain observatory Chinese Academy of Sciences Nanjing 210008

Near-infrared images and K-band spectroscopy of the massive star-formingregion IRAS 23151+5912 are presented. The JHK′ images reveal an embedded infrared clusterassociated with infrared nebula, and the H_2 (2.12 μm) narrowband image provides for the first timeevidence of outflow activity associated with the cluster. That the cluster is young can be shown bythe high percentage of infrared excess sources and the outflow activity. We suggest an age of thecluster of ～ 10~6 yr. Eight young stars are found in the bright nebular core around IRAS23151+5912. By the color-magnitude diagrams of the cluster, we found five high-mass YSOs and fourintermediate-mass YSOs in the cluster. Eight H_2 emission features are discovered in the region witha scattered and non-axisymmetric distribution, indicating the existence of multiple outflows drivenby the cluster. Diffuse H_2 emission detected to the north and to the west of the cluster mayresult from UV leakage of the cluster. Brγ, H_2, and CIV emission lines are found in the K-bandspectrum of the brightest source, NIRS 19, indicating the presence of envelope, stellar wind, andshock in the circumstellar environment. We have estimated an O7-O9 spectral type for the centralmassive YSO (20 ～ 30 solar mass), with an age of less than 1 x 10~6 yr.

关键词： infrared radiation stars: formation ISM: individual: IRAS 23151 + 5912 ISM: jets and outflows

Diagnostics of magnetic field strength for gyrosynchrotron radiation regions of the lower harmonics

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Chinese Science Bulletin 1998年第14期43卷 1183-1187页

作者： ZHOU Aihua purple mountain observatory, Chinese Academy of Sciences, Nanjing 210008, China purple mountain observatory Chinese Academy of Sciences Nanjing China

A diagnostic formula of magnetic field strength of gyrosynchrotron radiation regions of the lower harmonics (5 ≤S≤10 ) is presented based on their emissivity η νBN , absorptivity κ νBN , and the turnover frequency of radio spectra ν P. Their diagnostic error is estimated. And an accurate relation between electron energy spectral index δ and brightness temperature spectral index β is also given.

关键词： lower harmonic radio emission magnetic field.

THEORETICA　LCALCULATION　OF　ATOMIC　AND　MOLECULAR　DATA

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原子与分子物理学报 1997年第2期 35-37页

作者： Pei Chunchuan purple mountain observatory Academia Sinica Nanjing 210008

ＴＨＥＯＲＥＴＩＣＡＬＣＡＬＣＵＬＡＴＩＯＮＯＦＡＴＯＭＩＣＡＮＤＭＯＬＥＣＵＬＡＲＤＡＴＡＰｅｉＣｈｕｎｃｈｕａｎＰｕｒｐｌｅＭｏｕｎｔａｉｎＯｂｓｅｒｖａｔｏｒｙＡｃａｄｅｍｉａＳｉｎｉｃａＮａｎｊｉｎｇ２１０... 详细信息

ＴＨＥＯＲＥＴＩＣＡＬＣＡＬＣＵＬＡＴＩＯＮＯＦＡＴＯＭＩＣＡＮＤＭＯＬＥＣＵＬＡＲＤＡＴＡＰｅｉＣｈｕｎｃｈｕａｎＰｕｒｐｌｅＭｏｕｎｔａｉｎＯｂｓｅｒｖａｔｏｒｙＡｃａｄｅｍｉａＳｉｎｉｃａＮａｎｊｉｎｇ２１０００８ＡＢＳＴＲＡＣＴＢｙｕｓｉｎ...

关键词： Atomic and molecular data Interstellar molecules Equation of state Molecular lines observation

Multiwavelength study of low-luminosity 6.7-GHz methanol masers

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Research in Astronomy and Astrophysics 2011年第2期11卷 137-155页

作者： Yuan-Wei Wu,Ye Xu and Ji Yang purple mountain observatory,Chinese Academy of Sciences,Nanjing 210008,China purple mountain observatory Chinese Academy of Sciences Nanjing 210008 China

We present results of 13CO（1-0）,C18O（1-0）,and HCO＋（1-0） map observations and N2H＋（1-0） single point observations directed towards a sample of nine low-luminosity 6.7-GHz masers.N2H ＋ line emission has been detected from six out of nine sources,C18O line emission has been detected from eight out of nine sources,and HCO ＋ and 13CO emission has been detected in all *** particular,a ＂blue profile＂ of the HCO ＋ spectrum,a signature of inflow,is found towards one *** integrated intensity emission maps,we identified 17 cores in the *** them,nine cores are closely associated with low-luminosity methanol *** these cores,we derive the column densities,core sizes,masses and molecular *** of our results with similar molecular line surveys towards the southern sky methanol masers indicates that linewidths of our sample,including only the low-luminosity masers,are smaller than the sample that includes both lowand high-luminosity *** the maser associated cores,their gas masses have the same order of magnitude as their virial masses,indicating that these cores are gravitationally bound *** addition,we have found from our observations that the low-luminosity methanol masers tend to coexist with H2O masers and outflows rather than with OH masers.

关键词： masers -- ISM: abundances -- ISM: molecules -- stars: formation

Projection Effects on Physical Parameters Obtained from Solar Vector Magnetograms

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Chinese Journal of Astronomy and Astrophysics 2002年第2期2卷 174-182页

作者： Hui Li purple mountain observatory, Chinese Academy of Sciences, Nanjing 210008 National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 purple mountain observatory Chinese Academy of Sciences Nanjing 210008 []National Astronomical Observatories Chinese Academy of Sciences Beijing 100012

Projection effects in Huairou solar vector magnetograms are corrected by transferring or mapping the observed vector magnetogram in the image plane to the heliographic plane (planar correction) and to the heliospheric coordinate system (spherical correction). The magnetograms after the correction are considerably dif- ferent. The planar correction and the spherical correction lead to slightly different magnetic configurations, especially when the active region involved is far from the disk center. We also discuss the effects of the corrections on magnetic activity pa- rameters, such as magnetic shear, current helicity, etc. It is shown that the neutral line is obviously distorted after the mapping. The mapping generally decreases the average shear angle on the neutral line by several degrees when the active region is in the eastern hemisphere, and increases it when in the western hemisphere. In most of the cases studied, the correction reduces the current helicity imbalance, and sometimes even changes its sign. It is found that the current helicity imbalance may change its sign in its evolution when there are apparent fluxes emerging from the lower photosphere. The corrections increase the noise level of Bz greatly, and decrease the noise level of B~ slightly. The accuracy of the magnetic field measure- ment at Huairou is estimated to be better than 20 G and 150 G for the longitudinal and the transverse component, respectively.

关键词： Sun: magnetic fields ─Sun: activity ─Sun: photosphere