搜索结果: 1-11 共查到“天体物理学 planetary nebulae”相关记录11条 . 查询时间(0.142 秒)
A view of the solar neighbourhood: the local population of planetary nebulae and their mimics
the solar neighbourhood the local population
2011/1/10
We have, for the first time, compiled a nearly complete census of planetary nebulae (PNe) centred on the Sun. Our goal is the generation of an unbiased volume-limited sample, in order to answer some l...
Central Stars of Planetary Nebulae: New spectral classifications and catalogue
Central Stars Planetary Nebulae spectral classifications
2011/1/11
Context. There are more than 3000 true and probable known Galactic Planetary Nebulae (PNe), but only for 13% of them there is central star spectroscopic information available. Aims. To contribute to t...
From pre- to young Planetary Nebulae: radio continuum variability
stars AGB and post-AGB circumstellar matter – radio continuum
2010/11/10
Searching for variability, we have observed a sample of hot post-AGB stars and young Planetary Nebulae candidates with the Very Large Array at 4.8, 8.4, and 22.4 GHz.The sources had been previously de...
Radio-continuum detections of Galactic Planetary Nebulae I. MASH PNe detected in large-scale radio surveys
Radio-continuum Galactic Planetary Nebulae I
2011/1/10
We present an updated and newly compiled radio-continuum data-base for MASH PNe detected in the extant large scale "blind" radio-continuum surveys (NVSS, SUMSS/MGPS-2 and PMN) and, for a small number ...
A Spitzer/IRS spectral study of a sample of galactic carbon-rich proto-planetary nebulae
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/27
Recent infrared spectroscopic observations have shown that proto-planetary nebulae (PPNs) are sites of active synthesis of organic compounds in the late stages of stellar evolution. This paper present...
Wolf-Rayet Central Stars of Planetary Nebulae: Their Evolution and Properties
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/24
Over the past decade, the number of planetary nebula central stars (CSPN) known to exhibit the Wolf-Rayet (WR) phenomenon has grown substantially. Many of these discoveries have resulted from the Macq...
The Physical Characteristics of Binary Central Stars of Planetary Nebulae
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/24
A number of efforts are underway to detect close binary stars in planetary nebulae. The primary goal of these studies is to determine the binary fraction of central stars.
New candidate Planetary Nebulae in the IPHAS survey: the case of PNe with ISM interaction
Planetary nebulae ISM interaction survey
2010/3/8
We present the results of the search for candidate Planetary Nebulae interacting with the interstellar medium (PN-ISM) in the framework of the INT Photometric H$\alpha$ Survey (IPHAS) and located in t...
Study of electron density in planetary nebulae。
Third-dredge-up oxygen in planetary nebulae?
Jets and jet-like structures of low-ionization in planetary nebulae
low-ionization planetary nebulae jet-like structures
2009/6/5
Jets and jet-like structures of low-ionization in planetary nebulae。