Search Results - "van Hoof, Peter A M"

Real-Time Stellar Evolution of Sakurai's Object by Hajduk, Marcin, Zijlstra, Albert A, Herwig, Falk, van Hoof, Peter A. M, Kerber, Florian, Kimeswenger, Stefan, Pollacco, Don L, Evans, Aneurin, Lopéz, José A, Bryce, Myfanwy, Eyres, Stewart P. S, Matsuura, Mikako

“…After a hot white dwarf ceases its nuclear burning, its helium may briefly and explosively reignite. This causes the star to evolve back into a cool giant,…”
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JWST observations of the Ring Nebula (NGC 6720): I. Imaging of the rings, globules, and arcs by Wesson, R, Matsuura, Mikako, Zijlstra, Albert A, Volk, Kevin, Kavanagh, Patrick J, García-Segura, Guillermo, McDonald, I, Sahai, Raghvendra, Barlow, M J, Cox, Nick L J, Bernard-Salas, Jeronimo, Aleman, Isabel, Cami, Jan, Clark, Nicholas, Dinerstein, Harriet L, Justtanont, K, Kaplan, Kyle F, Manchado, A, Peeters, Els, Van de Steene, Griet C, van Hoof, Peter A M

“…ABSTRACT We present JWST images of the well-known planetary nebula NGC 6720 (the Ring Nebula), covering wavelengths from 1.6 to 25 $\, \mu$m. The bright shell…”
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Recent Development of the Atomic Line List by Van Hoof, Peter

“…The Atomic Line List is an online database of wavelengths and transition probabilities of atomic lines. It is primarily set up as a tool to help identify…”
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Implications of Infalling Fe II-Emitting Clouds in Active Galactic Nuclei: Anisotropic Properties by Ferland, Gary J, Hu, Chen, Wang, Jian-Min, Baldwin, Jack A, Porter, Ryan L, van Hoof, Peter A. M, Williams, R. J. R

“…We investigate consequences of the discovery that Fe II emission in quasars, one of the spectroscopic signatures of 'Eigenvector 1', may originate in infalling…”
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The Belgian Repository of Fundamental Atomic Data and Stellar Spectra (BRASS) Identifying Fruitful Methods for Producing Atomic Data by Laverick, Mike, Lobel, Alex, Royer, Pierre, Martayan, Christophe, Merle, Thibault, van Hoof, Peter, Van de Swaelmen, Mathieu, David, Marc, Hensberge, Herman, Thienpont, Emmanuel

“…The Belgian repository of fundamental atomic data and stellar spectra (BRASS) aims to provide the largest systematic and homogeneous quality assessment to-date…”
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The Real-Time Evolution of V4334 Sgr by van Hoof, Peter, Kimeswenger, Stefan, Van de Steene, Griet, Avison, Adam, Zijlstra, Albert, Guzman-Ramirez, Lizette, Herwig, Falk, Hajduk, Marcin

“…V4334 Sgr (Sakurai’s object) is an enigmatic evolved star that underwent a very late thermal pulse a few years before its discovery in 1996. It ejected a new…”
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The Belgian Repository of Fundamental Atomic Data and Stellar Spectra (BRASS) by Lobel, Alex, Royer, Pierre, Martayan, Christophe, Laverick, Michael, Merle, Thibault, Van der Swaelmen, Mathieu, van Hoof, Peter, David, Marc, Hensberge, Herman, Thienpont, Emmanuel

“…Background: BRASS (Belgian Repository of Fundamental Atomic Data and Stellar Spectra) is an international networking project for the development of a new…”
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Radio Continuum Spectra of Planetary Nebulae by Hajduk, Marcin, van Hoof, Peter, Sniadkowska, Karolina, Krankowski, Andrzej, Błaszkiewicz, Leszek, Dabrowski, Bartosz, Zijlstra, Albert

“…Radio continuum emission of planetary nebulae is a rich source of information about their structure and physical parameters. Although radio emission is well…”
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Recombination of Hot Ionized Nebulae: The Old Planetary Nebula around V4334 Sgr (Sakurai’s Star) by Reichel, Martin, Kimeswenger, Stefan, van Hoof, Peter A. M., Zijlstra, Albert A., Barría, Daniela, Hajduk, Marcin, Van de Steene, Griet C., Tafoya, Daniel

“…Abstract After becoming ionized, low-density astrophysical plasmas will begin a process of slow recombination. Models for this still have significant…”
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The cooling-down central star of the planetary nebula SwSt 1: a late thermal pulse in a massive post-AGB star? by Hajduk, Marcin, Todt, Helge, Hamann, Wolf-Rainer, Borek, Karolina, van Hoof, Peter A M, Zijlstra, Albert A

“…ABSTRACT SwSt 1 (PN G001.5-06.7) is a bright and compact planetary nebula containing a late [WC]-type central star. Previous studies suggested that the nebular…”
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Herschel Planetary Nebula Survey (HerPlaNS)★: hydrogen recombination laser lines in Mz 3 by Aleman, Isabel, Exter, Katrina, Ueta, Toshiya, Walton, Samuel, Tielens, A G G M, Zijlstra, Albert, Montez, Rodolfo, Abraham, Zulema, Otsuka, Masaaki, Beaklini, Pedro P B, van Hoof, Peter A M, Villaver, Eva, Leal-Ferreira, Marcelo L, Mendoza, Edgar, Lépine, Jacques D R

“…ABSTRACT The bipolar nebula Menzel 3 (Mz 3) was observed as part of the Herschel Planetary Nebula Survey (HerPlaNS), which used the PACS and SPIRE instruments…”
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First Images of the Molecular Gas around a Born-again Star Revealed by ALMA by Tafoya, Daniel, Toalá, Jesús A., Unnikrishnan, Ramlal, Vlemmings, Wouter H. T., Guerrero, Martín A., Kimeswenger, Stefan, van Hoof, Peter A. M., Zapata, Luis A., Treviño-Morales, Sandra P., Rodríguez-González, Janis B.

“…Abstract Born-again stars allow probing stellar evolution in human timescales and provide the most promising path for the formation of hydrogen-deficient…”
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Radiative cooling in collisionally ionized and photoionized plasmas by Lykins, M. L., Ferland, G. J., Porter, Ryan L., van Hoof, Peter A. M., Williams, R. J. R., Gnat, Orly

“…We discuss recent improvements in the calculation of the radiative cooling in both collisionally ionized and photoionized plasmas. We are extending the…”
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Ultraviolet emission lines of Si ii in cool star and solar spectra by Laha, Sibasish, Keenan, Francis P, Ferland, Gary J, Ramsbottom, Catherine A, Aggarwal, Kanti M, Ayres, Thomas R, Chatzikos, Marios, van Hoof, Peter AM, Williams, Robin J R

“…Recent atomic physics calculations for Si II are employed within the CLOUDY modelling code to analyse Hubble Space Telescope (HST) STIS ultraviolet spectra of…”
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Non-thermal radio emission in Sakurai's Object by Hajduk, Marcin, van Hoof, Peter A. M, Zijlstra, Albert A, Van de Steene, Griet, Kimeswenger, Stefan, Barría, Daniela, Tafoya, Daniel, Toalá, Jesús A

“…A&A 688, L21 (2024) The very late thermal pulse (VLTP) affects the evolution of $\sim$20\% of 1--8\,$\mathrm M_\odot$ stars, repeating the last phases of the…”
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Recombination of hot ionized nebulae: The old planetary nebula around V4334 Sgr (Sakurai's star) by Reichel, Martin, Kimeswenger, Stefan, van Hoof, Peter A. M, Zijlstra, Albert A, Barria, Daniela, Hajduk, Marcin, Van de Steene, Griet C, Tafoya, Daniel

“…After becoming ionized, low-density astrophysical plasmas will begin a process of slow recombination. Models for this still have significant uncertainties. The…”
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The cooling-down central star of the planetary nebula SwSt\,1: a late thermal pulse in a massive post-AGB star? by Hajduk, Marcin, Todt, Helge, Hamann, Wolf-Rainer, Borek, Karolina, van Hoof, Peter A. M, Zijlstra, Albert A

“…2020, Volume 498, pp. 1205-1220 SwSt 1 (PN G001.5-06.7) is a bright and compact planetary nebula containing a late [WC]-type central star. Previous studies…”
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First images of the molecular gas around a born-again star revealed by ALMA by Tafoya, Daniel, Toalá, Jesús A, Unnikrishnan, Ramlal, Vlemmings, Wouter H. T, Guerrero, Martín A, Kimeswenger, Stefan, van Hoof, Peter A. M, Zapata, Luis A, Treviño-Morales, Sandra P, Rodríguez-González, Janis B

“…Born-again stars allow probing stellar evolution in human timescales and provide the most promising path for the formation of hydrogen-deficient…”
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Properties of Dust Grains in Planetary Nebulae. I. The Ionized Region of NGC 6445 by van Hoof, Peter A. M, Van de Steene, Griet C, Beintema, Douwe A, Martin, P. G, Pottasch, Stuart R, Ferland, Gary J

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Radio observations of planetary nebulae: no evidence for strong radial density gradients by Hajduk, Marcin, van Hoof, Peter A. M, Śniadkowska, Karolina, Krankowski, Andrzej, Błaszkiewicz, Leszek, Dąbrowski, Bartosz, Zijlstra, Albert A

“…Radio continuum observations trace thermal emission of ionized plasma in planetary nebulae and bring useful information on nebular geometries. A model of…”
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