The importance of soft X-rays for the excitation of H2 emission in planetary nebulae

被引：8

作者：

Phillips, JP ^{[1
]}

机构：

[1] Inst Astron & Meteorol, Guadalajara 44130, Jalisco, Mexico

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2006年 / 368卷 / 02期

关键词：

planetary nebulae : general; infrared : ISM;

D O I：

10.1111/j.1365-2966.2006.10134.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We note that H-2 emitting planetary nebulae tend to have Zanstra temperatures T-Z(He II) > 90 kK. This is shown to be consistent with a large evolutionary lifetime, and the kinematic ages of the envelopes. Non-local thermodynamic equilibrium stellar atmospheric modelling also shows that levels of soft X-ray emission increase more rapidly than has previously been assumed, and are preferentially large in H-2 emitting sources. It is suggested that this may hold the key to explaining the strengths of the H-2 transitions.

引用

页码：819 / 824

页数：6

共 50 条

[1] Planetary nebulae with H2 emission
Rosado, M
Arias, L
EIGHTH MEXICO-TEXAS CONFERENCE ON ASTROPHYSICS: ENERGETICS OF COSMIC PLASMAS, 2003, 18 : 106 - 112
[2] X-rays from planetary nebulae
Chu, YH
Guerrero, MA
Gruendl, RA
ASYMMETRICAL PLANETARY NEBULAE II: FROM ORIGINS TO MICROSTRUCTURES, 2000, 199 : 419 - 422
[3] The emission of secondary electrons and the excitation of soft X-rays
Richardson, OW
PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-CONTAINING PAPERS OF A MATHEMATICAL AND PHYSICAL CHARACTER, 1930, 128 (807) : 63 - 74
[4] The excitation mechanism of H2 in bipolar planetary nebulae
Marquez-Lugo, R. A.
Guerrero, M. A.
Ramos-Larios, G.
Miranda, L. F.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2015, 453 (02) : 1888 - 1897
[5] The emission of secondary electrons and the excitation of soft X-rays
Richardson, OW
PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-CONTAINING PAPERS OF A MATHEMATICAL AND PHYSICAL CHARACTER, 1928, 119 (783) : 531 - 542
[6] The excitation of soft X-rays
Richardson, W
Chalklin, FC
PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-CONTAINING PAPERS OF A MATHEMATICAL AND PHYSICAL CHARACTER, 1926, 110 (754) : 247 - 282
[7] X-rays as the dominant excitation mechanism of [Fe II] and H2 emission lines in active galaxies
Dors, Oli L., Jr.
Riffel, Rogemar A.
Cardaci, Monica V.
Haegele, Guillermo F.
Krabbe, Angela C.
Perez-Montero, Enrique
Rodrigues, Irapuan
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2012, 422 (01) : 252 - 260
[8] Extended Structures of Planetary Nebulae Detected in H2 Emission
Fang, Xuan
Zhang, Yong
Kwok, Sun
Hsia, Chih-Hao
Chau, Wayne
Ramos-Larios, Gerardo
Guerrero, Martin A.
ASTROPHYSICAL JOURNAL, 2018, 859 (02):
[9] Nature of the H2 emission around planetary nebulae precursors
García-Hernández, DA
Manchado, A
García-Lario, P
Domínguez-Tagle, C
Conway, GM
Prada, F
PLANETARY NEBULAE: THEIR EVOLUTION AND ROLE IN THE UNIVERSE, 2003, (209): : 135 - 135
[10] The excitation of soft characteristic X-rays
Richardson, OW
Bazzoni, CB
PHILOSOPHICAL MAGAZINE, 1921, 42 (252): : 1015 - 1019

← 1 2 3 4 5 →