Results of infrared photometry and a model for the dust envelope of the protoplanetary nebula candidate V1027 Cyg

2009 ◽  
Vol 53 (9) ◽  
pp. 850-856 ◽  
Author(s):  
M. B. Bogdanov ◽  
O. G. Taranova
Keyword(s):  
Infrared Photometry ◽  
Dust Envelope ◽  
Protoplanetary Nebula

scholarly journals Infrared photometry of cool white dwarfs

1982 ◽  
Vol 198 (2) ◽  
pp. 473-482 ◽  
Author(s):  
D. T. Wickramasinghe ◽  
D. A. Allen ◽  
M. S. Bessell
Keyword(s):  
White Dwarfs ◽  
Infrared Photometry ◽  
Cool White Dwarfs

scholarly journals Molecular Envelopes of Planetary Nebulae and Proto-Planetary Nebulae

1994 ◽  
Vol 140 ◽  
pp. 152-153
Author(s):  
Sun Kwok
Keyword(s):  
Planetary Nebulae ◽  
Asymptotic Giant Branch ◽  
High Rate ◽  
Radiative Transfer Model ◽  
Spectral Energy ◽  
Transfer Model ◽  
Energy Distributions ◽  
Cool Component ◽  
Dust Envelope ◽  
Peak Energy

As stars evolve up the asymptotic giant branch (AGB), they begin to lose mass at a high rate, and in the process they create extended circumstellar molecular envelopes. Since the transition from AGB to planetary nebula stages is of the order of 1000 yr, the remnant of such molecular envelopes should still be observable in pro to-planetary nebulae (PPN) and planetary nebulae (PN). Recent ground-based survey of cool IRAS sources have discovered ~30 candidates of PPN (Kwok 1992). These sources show the characteristic “double-peak” energy distribution. The cool component is due to the remnant of the AGB dust envelope, and the hot component represents the reddened photosphere. The fact that the two components are clearly separated suggests that the dust envelope is well detached from the photosphere. Radiative transfer model fits to the spectral energy distributions of PPN suggest a typical separation of ~1 arc sec between the dust envelope and the photosphere, and such “hole-in-the-middle” structure can be mapped by millimeter interferometry in CO.

Near infrared photometry of stellar maser sources

1986 ◽  
Vol 10 (1) ◽  
pp. 62-66 ◽  
Author(s):  
Ke-ping Zhou ◽  
Yun-xiang Hao ◽  
Pei-sheng Chen ◽  
Yun Zhang ◽  
Heng Gao
Keyword(s):  
Near Infrared ◽  
Infrared Photometry ◽  
Maser Sources

scholarly journals Aperture Synthesis CO(J=1—0) Observations and Near-Infrared Photometry of the Non-Barred Seyfert Galaxy NGC 5033

2003 ◽  
Vol 55 (1) ◽  
pp. 103-119 ◽  
Author(s):  
Kotaro Kohno ◽  
Baltasar Vila-Vilaró ◽  
Seiichi Sakamoto ◽  
Ryohei Kawabe ◽  
Sumio Ishizuki ◽  
...  
Keyword(s):  
Near Infrared ◽  
Seyfert Galaxy ◽  
Aperture Synthesis ◽  
Infrared Photometry

scholarly journals Infrared photometry and spectrometry of Nova Aquilae 1982

1984 ◽  
Vol 207 (4) ◽  
pp. 897-907 ◽  
Author(s):  
M. F. Bode ◽  
A. Evans ◽  
D. C. B. Whittet ◽  
D. K. Aitken ◽  
P. F. Roche ◽  
...  
Keyword(s):  
Infrared Photometry
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