Search Results - "Nowotny, W"

Synthetic photometry for M and K giants and stellar evolution: hydrostatic dust-free model atmospheres and chemical abundances by Aringer, B., Girardi, L., Nowotny, W., Marigo, P., Bressan, A.

“…Based on a grid of hydrostatic spherical comarcs models for cool stars, we have calculated observable properties of these objects, which will be mainly used in…”
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Carbon stars with increased oxygen and nitrogen abundances: hydrostatic dust-free model atmospheres by Aringer, B, Marigo, P, Nowotny, W, Girardi, L, Mečina, M, Nanni, A

“…We have computed a grid of hydrostatic spherical COMARCS models for C stars covering metallicities from [Z/H] = 0 to -2 and values of the carbon excess [C-O]…”
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IS THERE A METALLICITY CEILING TO FORM CARBON STARS?—A NOVEL TECHNIQUE REVEALS A SCARCITY OF C STARS IN THE INNER M31 DISK by Boyer, M L, Girardi, L, Marigo, P, Williams, B F, Aringer, B, Nowotny, W, Rosenfield, P, Dorman, C E, Guhathakurta, P, Dalcanton, J J, Melbourne, J L, Olsen, K A G, Weisz, D R

“…We use medium-band near-infrared (NIR) Hubble Space Telescope WFC3 photometry with model NIR spectra of asymptotic giant branch (AGB) stars to develop a new…”
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STEREO observations of long period variables by Wraight, K. T., Bewsher, D., White, Glenn J., Nowotny, W., Norton, A. J., Paladini, C.

“…Abstract Observations from the Heliospheric Imagers (HI-1) on both the STEREO spacecrafts have been analysed to search for very long period large amplitude…”
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STEREO observations of long period variables: STEREO observations of LPVs by Wraight, K. T., Bewsher, D., White, Glenn J., Nowotny, W., Norton, A. J., Paladini, C.

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Pulsation-induced atmospheric dynamics in M-type AGB stars. Effects on wind properties, photometric variations and near-IR CO line profiles by Liljegren, S, Höfner, S, Eriksson, K, Nowotny, W

“…A&A 606, A6 (2017) Wind-driving in asymptotic giant branch (AGB) stars is commonly attributed to a two-step process. First, matter in the stellar atmosphere is…”
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Extended view on the dust shells around two carbon stars by Mečina, M, Aringer, B, Nowotny, W, Groenewegen, M. A. T, Kerschbaum, F, Brunner, M, Gail, H. -P

“…A&A 644, A66 (2020) Stars on the asymptotic giant branch (AGB) lose considerable amounts of matter through their dust-driven stellar winds. A number of such…”
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Dust-driven winds of AGB stars: The critical interplay of atmospheric shocks and luminosity variations by Liljegren, S, Höfner, S, Nowotny, W, Eriksson, K

“…A&A 589, A130 (2016) Winds of AGB stars are thought to be driven by a combination of pulsation-induced shock waves and radiation pressure on dust. In dynamic…”
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(Re)Solving the dynamic atmospheres of carbon-rich giants by Hron, J., Verhoelst, Tijl, Nowotny, W., Hoefner, S., Galsteter, W.

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Synthetic radii and visibilities for pulsating red giants by Hron, Josef, Nowotny, Walter, Gautschy-Loidl, Rita, Hoefner, Susanne

“…We present synthetic radii and visibilities in the IR, based on hydrostatic and dynamic model atmospheres of carbon stars. The differences between these two…”
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Synthetic photometry for carbon-rich giants. III. Tracing the sequence of mass-losing galactic C-type Miras by Nowotny, W, Aringer, B, Hoefner, S, Eriksson, K

“…With the help of model calculations we aim at reproducing the observational photometric findings for a large sample of well-characterised galactic C-type Mira…”
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Modelling the atmosphere of the carbon-rich Mira RU Vir by Rau, G, Paladini, C, Hron, J, Aringer, B, Groenewegen, M. A. T, Nowotny, W

“…A&A 583, A106 (2015) Context. We study the atmosphere of the carbon-rich Mira RU Vir using the mid-infrared high spatial resolution interferometric…”
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Line formation in AGB atmospheres including velocity effects. Molecular line profile variations of long period variables by Nowotny, W, Hoefner, S, Aringer, B

“…The atmospheres of evolved red giants are considerably influenced by pulsations of the stellar interiors and developing stellar winds. The resulting complex…”
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Carbon stars in the X-Shooter Spectral Library: II. Comparison with models by Gonneau, A, Lançon, A, Trager, S. C, Aringer, B, Nowotny, W, Peletier, R. F, Prugniel, P, Chen, Y. -P, Lyubenova, M

“…A&A 601, A141 (2017) In a previous paper, we assembled a collection of medium-resolution spectra of 35 carbon stars, covering optical and near-infrared…”
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Aperture synthesis imaging of the carbon AGB star R Sculptoris: Detection of a complex structure and a dominating spot on the stellar disk by Wittkowski, M, Hofmann, K. -H, Höfner, S, Bouquin, J. B. Le, Nowotny, W, Paladini, C, Young, J, Berger, J. -P, Brunner, M, de Gregorio-Monsalvo, I, Eriksson, K, Hron, J, Humphreys, E. M. L, Lindqvist, M, Maercker, M, Mohamed, S, Olofsson, H, Ramstedt, S, Weigelt, G

“…A&A 601, A3 (2017) We present near-infrared interferometry of the carbon-rich asymptotic giant branch (AGB) star R Sculptoris. The visibility data indicate a…”
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Detection of an asymmetry in the envelope of the carbon Mira R Fornacis using VLTI/MIDI by Paladini, C, Sacuto, S, Klotz, D, Ohnaka, K, Wittkowski, M, Nowotny, W, Jorissen, A, Hron, J

“…Aims. We present a study of the envelope morphology of the carbon Mira R For with VLTI/MIDI. This object is one of the few asymptotic giant branch (AGB) stars…”
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Carbon stars in the X-shooter Spectral Library by Gonneau, A, Lançon, A, Trager, S. C, Aringer, B, Lyubenova, M, Nowotny, W, Peletier, R. F, Prugniel, P, Chen, Y. -P, Dries, M, Choudhury, O. S, Falcón-Barroso, J, Koleva, M, Meneses-Goytia, S, Sánchez-Blázquez, P, Vazdekis, A

“…A&A 589, A36 (2016) We provide a new collection of spectra of 35 carbon stars obtained with the ESO/VLT X-shooter instrument as part of the X-shooter Spectral…”
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Long-period variables in NGC147 and NGC185 by Lorenz, D, Lebzelter, T, Nowotny, W, Telting, J, Kerschbaum, F, Olofsson, H, Schwarz, H. E

“…Previous studies on the stellar content of the two nearby dwarf galaxies NGC147 and NGC185 reveal a rich population of late-type giants in both systems,…”
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STEREO observations of long period variables by Wraight, K. T, Bewsher, D, White, Glenn J, Nowotny, W, Norton, A. J, Paladini, C

“…Observations from the Heliospheric Imagers (HI-1) on both the STEREO spacecraft have been analysed to search for very long period large amplitude stellar…”
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Synthetic photometry for carbon rich giants, I. Hydrostatic dust-free models by Aringer, B, Girardi, L, Nowotny, W, Marigo, P, Lederer, M. T

“…We study the spectroscopic and photometric properties of carbon stars. In the first paper of this series we focus on objects that can be described by…”
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