IR photometry results and dust envelope model for symbiotic Mira star candidate V 335 Vul

2017 ◽  
Vol 72 (4) ◽  
pp. 447-451
Author(s):  
M. B. Bogdanov ◽  
O. G. Taranova ◽  
V. I. Shenavrin
Keyword(s):  
Dust Envelope ◽  
Envelope Model ◽  
Ir Photometry

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.

scholarly journals Spectroscopy and Optical/IR Photometry of the Cataclysmic Variable CPD-48° 1577

1984 ◽  
Vol 80 ◽  
pp. 145-151
Author(s):  
W. Wargau ◽  
A. Bruch ◽  
H. Drechsel ◽  
J. Rahe ◽  
R. Schoembs
Keyword(s):  
Emission Line ◽  
Cataclysmic Variable ◽  
Line Profiles ◽  
Photometric Variability ◽  
Ir Photometry

AbstractThe photometric variability of CPD-48°1577 in the optical and IR ranges is discussed. The structure and variation of prominent emission line profiles are investigated. An estimate of the distance is given.

scholarly journals Toward a Robust Estimate of the Merger Rate Evolution Using Near‐IR Photometry

2008 ◽  
Vol 681 (2) ◽  
pp. 1089-1098 ◽  
Author(s):  
A. Rawat ◽  
Francois Hammer ◽  
Ajit K. Kembhavi ◽  
Hector Flores
Keyword(s):  
Robust Estimate ◽  
Near Ir ◽  
Merger Rate ◽  
Ir Photometry

IR photometry and polarimetry of 2A0311–227

Nature ◽  
1980 ◽  
Vol 285 (5763) ◽  
pp. 306-308 ◽  
Author(s):  
J. Bailey ◽  
J. H. Hough ◽  
D. J. Axon
Keyword(s):  
Ir Photometry

From Coarse to Fine: An Augmented Reality Based Dynamic Inspection Method for Visualized Railway Routing of Freight Cars

2021 ◽  
Author(s):  
Bing Yi ◽  
Renkai Sun ◽  
Long Liu ◽  
Yongfeng Song ◽  
Yinggui Zhang
Keyword(s):  
Augmented Reality ◽  
High Efficiency ◽  
Low Cost ◽  
Digital Data ◽  
Route Selection ◽  
Inspection Method ◽  
Envelope Model ◽  
Freight Car ◽  
Cargo Transportation ◽  
Selection Of

Abstract It is a challenge for the dynamic inspection of railway route for freight car transporting cargo that out-of-gauge. One possible way is using the inspection frame installed in the inspection train to simulate the whole procedure for cargo transportation, which costs a lot of manpower and material resources as well as time. To overcome the above problem, this paper proposes an augmented reality (AR) based dynamic inspection method for visualized railway routing of freight car with out-of-gauge. First, the envelope model of the dynamic moving train with out-of-gauge cargo is generated by using the orbital spectrum of the railway, and the envelope model is matched with a piece of homemade calibration equipment located on the position of the railway that needs to be inspected. Then, the structure from motion (SFM) algorithm is used to reconstruct the environment where the virtual envelope model occludes the buildings or equipment along the railway. Finally, the distance function is adopted to calculate the distance between the obstacle and the envelope of the freight car with out-of-gauge, determining whether the freight car can pass a certain line. The experimental results show that the proposed method performs well for the route selection of out-of-gauge cargo transportation with low cost, high precision, and high efficiency. Moreover, the digital data of the environments along the railway and the envelope of the freight car can be reused, which will increase the digitalization and intelligence for route selection of out-of-gauge cargo transportation.

scholarly journals Simultaneous optical and near-IR photometry of 4U1957+115 - a missing secondary star

2014 ◽  
Vol 444 (4) ◽  
pp. 3802-3808 ◽  
Author(s):  
Pasi Hakala ◽  
Panu Muhli ◽  
Phil Charles
Keyword(s):  
Secondary Star ◽  
Near Ir ◽  
Ir Photometry

scholarly journals Study of the inner dust envelope and stellar photosphere of the AGB star R Doradus using SPHERE/ZIMPOL

2016 ◽  
Vol 591 ◽  
pp. A70 ◽  
Author(s):  
T. Khouri ◽  
M. Maercker ◽  
L. B. F. M. Waters ◽  
W. H. T. Vlemmings ◽  
P. Kervella ◽  
...  
Keyword(s):  
Dust Envelope ◽  
Stellar Photosphere

scholarly journals Preliminary prediction of the potential distribution and consequences of Haemaphysalis longicornis using a simple rule-based climate envelope model

2018 ◽  
Author(s):  
Krisztian Magori
Keyword(s):  
Atlantic Coast ◽  
The United States ◽  
Simple Rule ◽  
Potential Range ◽  
Haemaphysalis Longicornis ◽  
Rule Based ◽  
The Us ◽  
Climate Envelope ◽  
Envelope Model ◽  
The Many

AbstractHaemaphysalis longicornis, the Asian longhorned (or bush) tick has been detected on a sheep in August 2017 in Hunterdon County, New Jersey. By October 26, 2018, this tick has been detected in 44 counties in 9 states along the Atlantic coast of the United States, with the first detection backdated to 2010. Here, I use a simple rule-based climate envelope model, based on a prior analysis in New Zealand, to provide a preliminary analysis of the potential range of this introduced tick species in North America. After validating this model against the counties where the tick has been already detected, I highlight the counties where this tick might cause considerable economic harm. I discuss the many limitations of this simple approach, and potential remedies for these limitations, and more sophisticated approaches. Finally, I conclude that substantial areas of the US, especially along the Gulf and Atlantic coast, are suitable for the establishment of this tick, putting millions of heads of livestock potentially at risk.

A two-port envelope model for building heat transfer

1998 ◽  
Vol 34 (1) ◽  
pp. 19-30 ◽  
Author(s):  
C. Lombard ◽  
E.H. Mathews
Keyword(s):  
Heat Transfer ◽  
Envelope Model ◽  
Building Heat
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