Results 21 to 30 of about 3,198,190 (296)

Luminous Blue Variables

Galaxies, 2020
Luminous Blue Variables are massive evolved stars, here we introduce this outstanding class of objects. Described are the specific characteristics, the evolutionary state and what they are connected to other phases and types of massive stars. Our current
Kerstin Weis, Dominik J. Bomans
doaj   +1 more source

Mass loss rates of a sample of irregular and semiregular M-type AGB-variables [PDF]

, 2002
We have determined mass loss rates and gas expansion velocities for a sample of 69 M-type irregular (IRV; 22 objects) and semiregular (SRV; 47 objects) AGB-variables using a radiative transfer code to model their circumstellar CO radio line emission.
Arndt, Barthès, Bergman, Bernes, Chandra, Crosas, D. González Delgado, Doty, Elitzur, F. Kerschbaum, F. L. Schöier, Flower, Flower, Glassgold, Groenewegen, Groenewegen, Groenewegen, H. Olofsson, Habing, Habing, Hale, Huggins, Huggins, Höfner, Jura, Kahane, Kahane, Kahane, Kastner, Kerschbaum, Kerschbaum, Kerschbaum, Kerschbaum, Kerschbaum, Knapp, Knapp, Kwan, Kwok, Lindqvist, Lindqvist, Mamon, Marengo, Mauron, Netzer, Neufeld, Olofsson, Olofsson, Olofsson, Olofsson, Ryde, Ryde, Schinke, Schöier, Schöier, van Langevelde, Winters, Young   +56 more
core   +3 more sources

SN 2009ip: CONSTRAINTS ON THE PROGENITOR MASS-LOSS RATE [PDF]

The Astrophysical Journal, 2013
8 pages, accepted to ...
Ofek, E. O., Lin, Lin, Kouveliotou, C., Younes, G., Göğüş, Ersin, Kasliwal, M. M., Cao, Y.   +6 more
openaire   +3 more sources

MASS-LOSS RATES OF OH/IR STARS [PDF]

Journal of The Korean Astronomical Society, 2013
We compare mass-loss rates of OH/IR stars obtained from radio observations with those derived from the dust radiative transfer models and IR observations. We collect radio observational data of OH maser and CO line emission sources for a sample of 1533 OH/IR stars listed in Suh & Kwon (2011).
Kyung-Won Suh, Young-Joo Kwon
openaire   +1 more source

Constraints on decreases in Eta Carinae's mass loss from 3D hydrodynamic simulations of its binary colliding winds [PDF]

, 2013
Recent work suggests that the mass-loss rate of the primary star (Eta A) in the massive colliding wind binary Eta Carinae dropped by a factor of 2-3 between 1999 and 2010. We present results from large- (r=1545au) and small- (r=155au) domain, 3D smoothed
Corcoran, Michael F., Groh, Jose H., Gull, Theodore R., Hamaguchi, Kenji, Madura, Thomas I., Okazaki, Atsuo T., Owocki, Stanley P., Russell, Christopher M. P., Teodoro, Mairan   +8 more
core   +3 more sources

The Effects of Wetting-drying Cycles on Degradation of Sands and Gravels Used for Soil Mulching in Ningxia Province

Guan'gai paishui xuebao, 2022
【Objective】 Sand and gravel mulching is a technology widely used for crop production in the arid regions in northwestern China. Continuous weathering could result in their degradation; the purpose of this paper is to study the effects of wetting-drying ...
AN Wenju, LI Wangcheng, ZHAO Guangxin, JIA Zhenjiang, LIU Qiaoling, WANG Jie, MU Min, LI Yangyang   +7 more
doaj   +1 more source

The mass loss rate of γ Velorum [PDF]

Symposium - International Astronomical Union, 1979
The CIII λ 1909 absorption feature (deepest at V=−1600 Km s−1) in this star, observed by Burton et al (1975) and Johnson (1978), was predicted by Castor and Nussbaumer (1972). It implies a copious flow of CIII ions, because the oscillator strength is only fik = 1.6× 10−7.
openaire   +1 more source

Study of the Mass-loss Rate from the Sun

The Astrophysical Journal, 2022
Abstract We investigate the temporal evolution of the yearly total mass-loss rate (YTMLR) from the Sun through coronal mass ejections (CMEs) over solar cycles 23 and 24. The mass determination of CMEs can be subject to significant uncertainty. To minimize this problem, we have used extensive statistical analysis.
Grzegorz Michalek, Nat Gopalswamy, Seiji Yashiro   +2 more
openaire   +2 more sources

Probing the mass-loss history of AGB and red supergiant stars from CO rotational line profiles - II. CO line survey of evolved stars: derivation of mass-loss rate formulae [PDF]

, 2010
We aim to (1) set up simple and general analytical expressions to estimate mass-loss rates of evolved stars, and (2) from those calculate estimates for the mass-loss rates of asymptotic giant branch (AGB), red supergiant (RSG), and yellow hypergiant ...
A. de Koter, Anders, Barthès, Bergeat, Bergeat, Bessell, Bessell, Bieging, Blackwell, Bujarrabal, Castro-Carrizo, Dambis, de Jager, Decin, Decin, Decin, Decin, Delfosse, di Benedetto, Dinh, E. De Beck, F. Kemper, Faure, Faúndez, Feast, Feast, Feast, García-Hernández, Green, Groenewegen, Groenewegen, Groenewegen, Haniff, He, Huggins, Humphreys, Iben, Josselin, Justtanont, Justtanont, K. Justtanont, K. M. Menten, Kahane, Kemper, Kerschbaum, Knapp, Knapp, Knapp, Knapp, Kwan, Kwok, L. Decin, Lasdon, Lebzelter, Levesque, Levesque, Likkel, Loup, Margulis, Marigo, Marigo, Massey, Massey, Matsuura, Mauron, Mauron, Milam, Neri, Neufeld, Nyman, Ohnaka, Olivier, Olofsson, Olofsson, Oudmaijer, Ramstedt, Ramstedt, Sahai, Schlegel, Schöier, Schöier, Schöier, Schöier, Schönberg, Skinner, Sloan, Slootmaker, Sopka, Speck, Stanek, Suárez, T. Verhoelst, Teyssier, van Langevelde, van Zadelhoff, Vassiliadis, Verhoelst, Wang, Wannier, Whitelock, Whitelock, Whitelock, Whitelock, Winters, Winters, Wood, Yeşilyaprak, Ziurys, Zuckerman   +108 more
core   +2 more sources

An in-situ method for assessing soil aggregate stability in burned landscapes

Zhongguo dizhi zaihai yu fangzhi xuebao, 2023
Due to soil repellency in burned areas, slope runoff and soil erodibility escalates following forest fires, increasing the vulnerability to post-fire debris flows.
Yonghao ZHOU, Xiewen HU, Tao JIN, Wenchao DUAN, Xueqiang GONG, Chuanjie XI, Xichao CAO   +6 more
doaj   +1 more source