Article
Astronomy & Astrophysics
David Jones, James Munday, Romano L. M. Corradi, Pablo Rodriguez-Gil, Henri M. J. Boffin, Jiri Zak, Paulina Sowicka, Steven G. Parsons, Vik S. Dhillon, S. P. Littlefair, T. R. Marsh, Nicole Reindl, Jorge Garcia-Rojas
Summary: We conducted a detailed study on the post-common envelope binary central star of the planetary nebula Ou 5, obtaining information about the companion star's spectral type, parameters of both stars, and orbital characteristics. The modelling results suggest that the companion star is of low mass with a larger radius, and the characteristics of the nebular progenitor are consistent with a post-red giant branch evolution. However, accurately determining the component masses remains challenging.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
I Gallardo Cava, V Bujarrabal, J. Alcolea, M. Gomez-Garrido, M. Santander-Garcia
Summary: We studied the molecular content of nebulae around binary post-AGB stars with Keplerian dynamics and found that the molecular content in these nebulae is relatively low with weaker molecular lines and abundances compared to AGB stars.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
M. Politano
Summary: This paper examines the impact of adding a dynamical constraint in population synthesis calculations to explain the observed shorter orbital periods of planetary nebulae with binary cores in close binary star systems.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
J. A. Toala, V Lora, B. Montoro-Molina, M. A. Guerrero, A. Esquivel
Summary: This study presents 3D radiation-hydrodynamic simulations on the formation and evolution of born-again planetary nebulae, focusing on the case of HuBi 1. The simulations suggest that the inner shell of HuBi 1 may have been formed by an explosive very late thermal pulse, affecting the velocity and pressure structure of the outer nebula and creating turbulent ionized structures. The results also show that the kinetic energy of the H-poor ejecta of HuBi 1 is significantly higher compared to other born-again PNe, indicating a truly unique VLTP event.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
I. Gallardo Cava, J. Alcolea, V. Bujarrabal, M. Gomez-Garrido, A. Castro-Carrizo
Summary: This study focuses on the hourglass-like structure surrounding the Keplerian disk around 89 Her. By merging maps from different observations, the entire detectable flux of the source is determined, and it is found that the extended outflow is larger and more massive than previously thought. This study confirms the existence of two subclasses of envelopes around binary post-AGB stars depending on the dominance of certain components.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
I. Gallardo Cava, M. Gomez-Garrido, V Bujarrabal, A. Castro-Carrizo, J. Alcolea, H. Van Winckel
Summary: A study was conducted on a class of binary post-AGB stars to investigate the presence of rotating disks, where the outflow appears to be the dominant component.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
M. Santander-Garcia, D. Jones, J. Alcolea, V Bujarrabal, R. Wesson
Summary: By investigating a sample of 21 post-common envelope planetary nebulae, researchers found that these nebulae generally lack molecular content and have higher mass, momentum, and kinetic energy compared to regular nebulae. Reconstruction of the common envelope for four objects suggests that single-degenerate nebulae only account for a small fraction of the envelope of their progenitor stars.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
M. A. Guerrero, R. Ortiz, L. Sabin, G. Ramos-Larios, E. J. Alfaro
Summary: Sab 19 is a planetary nebula consisting of an inner double-shell nebula with a small radius and an outer shell with a larger radius. Analysis of its sub-solar N/O ratio abundances, low ionized mass, peculiar radial velocity, and low-mass central star classifies it as a Type III planetary nebula, indicating that the main nebula evolved from crossing the Perseus Arm.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
M. Lorenzo, D. Teyssier, V. Bujarrabal, P. Garcia-Lario, J. Alcolea, E. Verdugo, A. Marston
Summary: High kinetic temperatures were found in the fast winds of pPNe, typically reaching between 75 K and 200 K. In contrast, the high-velocity gas in the sampled PNe is colder, with characteristic temperatures between 25 K and 75 K, and it is found in a lower excitation state. This correlation of the kinetic temperature and excitation state of fast outflows with the amount of time elapsed since their acceleration is interpreted as a consequence of the cooling that occurred during the pre-planetary nebula phase.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
V Lora, J. A. Toala, J. Gonzalez-Carbajal, M. A. Guerrero, A. Esquivel, G. Ramos-Larios
Summary: We present the first 3D radiation-hydrodynamic simulations of the formation of planetary nebulae (PNe) emerging from 3D spiral patterns. The orbital period of the binary producing the 3D spiral pattern has consequences on the formation and shaping of the PN itself. By adopting a phase of jet ejections between the AGB and post-AGB stages, we are able to recover the morphologies of proto-PNe and PNe that exhibit ring-like structures in their haloes.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Ivan Rapoport, Ealeal Bear, Noam Soker
Summary: In certain exoplanetary systems, planets will accelerate the rotation of their parent stars' envelopes, potentially leading to non-spherical mass-loss processes.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
A. Castellanos-Ramirez, A. Rodriguez-Gonzalez, Z. Meliani, P. R. Rivera-Ortiz, A. C. Raga, J. Canto
Summary: Analytical and numerical models of winds from red giant stars orbiting a binary companion show different structures such as double spirals, single spirals, and clumpy structures. These structures may indicate the presence of two strong winds from the stars in the central binary system.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Patrick A. Ondratschek, Friedrich K. Roepke, Fabian R. N. Schneider, Christian Fendt, Christian Sand, Sebastian T. Ohlmann, Rudiger Pakmor, Volker Springel
Summary: The asymmetric shapes and evidence of binary central stars in many bipolar planetary nebulae suggest a common-envelope origin. The faster expansion of the bipolar components compared to the rest of the nebulae indicates the slower expanding material is associated with the bulk of the ejected envelope during the common-envelope phase of a binary star system. Magnetohydrodynamic simulations show that magnetic fields are strongly amplified during two consecutive episodes, leading to the launch of a magnetically-driven, high-velocity outflow that reproduces the observed structures in young planetary nebulae. This magnetic driving mechanism is likely responsible for a significant fraction of observed planetary nebulae and may also play a role in the common-envelope phase of other binary stars.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
William J. Henney, J. A. Lopez, Ma T. Garcia-Diaz, M. G. Richer
Summary: In this study, a comprehensive kinematic and morphological analysis of the asymmetric planetary nebula NGC 6210 was conducted, revealing the presence of five distinct ejection axes. Significant changes in outflow directions were detected during different stages of the planetary nebula phase, challenging existing models of planetary nebula formation and shaping.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Howard E. Bond, Klaus Werner, Gregory R. Zeimann, Jonathan Talbot
Summary: This paper reports the discovery of a 14th-magnitude central star in the faint emission nebula G126.8-15.5. Spectrograms and model-atmosphere analysis were used to determine the spectral classification and physical parameters of the star. The location of the central star on the log g-T-eff plane suggests it is not in a post-asymptotic-giant-branch evolutionary status. The researchers propose that Fr 2-30 is a 'PN mimic', resulting from a chance encounter between a hot sdO star and an interstellar cloud.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Alex Debrecht, Jonathan Carroll-Nellenback, Adam Frank, Eric G. Blackman, Luca Fossati, Ruth Murray-Clay, John McCann
Summary: The role of charge exchange in shaping exoplanet photoevaporation is still debated. In this paper, we present results from three-dimensional hydrodynamic simulations that show electron exchange between stellar and planetary winds cannot explain the absorption observed at high Doppler velocities.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Atma Anand, Jonathan Carroll-Nellenback, Eric G. Blackman, John A. Tarduno
Summary: Magnetic fields are important for understanding the thermal, material, and structural history of planetary and sub-planetary bodies. This study explores how the stellar wind can amplify magnetic fields in initially unmagnetized bodies, finding a broadly applicable scaling relation and discussing the saturation of magnetic fields. The research highlights that denser and faster winds lead to stronger amplification of magnetic fields.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Joel H. Kastner, Paula Moraga Baez, Bruce Balick, Jesse Bublitz, Rodolfo Montez, Adam Frank, Eric Blackman
Summary: This study presents the results of an imaging study of the young planetary nebula NGC 6302, using the Hubble Space Telescope's Wide Field Camera 3. The study identifies various structures within the nebula, including a dusty toroidal equatorial structure, fine clumps and filaments within the lobes, and bright emission of [Fe ii]. The comparison with earlier imaging reveals that the previously identified central star is actually a foreground field star.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
G. Guidarelli, J. Nordhaus, J. Carroll-Nellenback, L. Chamanady, A. Frank, E. G. Blackman
Summary: Observations show that many isolated white dwarfs have magnetic fields exceeding a MegaGauss. These magnetic fields are likely formed in interacting binary systems, where the companion star is destroyed, leaving behind a highly magnetized white dwarf. Using hydrodynamical simulations, we studied the tidal disruption of planets and brown dwarfs inside an asymptotic giant branch star, leading to the formation of accretion discs.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Yangyuxin Zou, Luke Chamandy, Jonathan Carroll-Nellenback, Eric G. Blackman, Adam Frank
Summary: This study investigates the effects of jet feedback on the orbital evolution and envelope unbinding process during a common envelope (CE) event. The results show that jets can efficiently transfer energy to bound envelope material, leading to an increase in unbound mass.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Physics, Multidisciplinary
Damian Radoslaw Sowinski, Jonathan Carroll-Nellenback, Jeremy DeSilva, Adam Frank, Gourab Ghoshal, Marcelo Gleiser
Summary: Agents interacting with their environments make decisions based on their limited access to data and cognitive limitations, leading to different conclusions and actions. This has a significant impact on polities based on information sharing and can result in a consensus problem.
Article
Physics, Fluids & Plasmas
R. N. Markwick, A. Frank, J. Carroll-Nellenback, E. G. Blackman, P. M. Hartigan, S. V. Lebedev, D. R. Russell, J. W. D. Halliday, L. G. Suttle
Summary: By simulating and studying the bow shock formed by the collision of hypersonic flows, it is found that the motion of the interaction region is driven by imbalances in ram pressure between the two flows, and the conical structure of the bow shock is a result of deflected lateral outflows when the flows have differing cross sections.
PHYSICS OF PLASMAS
(2022)
Article
Physics, Multidisciplinary
Abraham Chien, Lan Gao, Shu Zhang, Hantao Ji, Eric G. Blackman, William Daughton, Adam Stanier, Ari Le, Fan Guo, Russ Follett, Hui Chen, Gennady Fiksel, Gabriel Bleotu, Robert C. Cauble, Sophia N. Chen, Alice Fazzini, Kirk Flippo, Omar French, Dustin H. Froula, Julien Fuchs, Shinsuke Fujioka, Kenneth Hill, Sallee Klein, Carolyn Kuranz, Philip Nilson, Alexander Rasmus, Ryunosuke Takizawa
Summary: Laboratory experiments confirm that electrons can be accelerated to high energies by the reconnection electric field in magnetically driven reconnection. This mechanism is important in various astrophysical environments. However, none of the proposed reconnection acceleration mechanisms have been experimentally confirmed due to measurement limitations.
Article
Astronomy & Astrophysics
Eric G. Blackman, Sergey V. Lebedev
Summary: The physics of astrophysical jets can be divided into three stages, and experiments are commonly used tools in studying them. However, due to the lack of specialized experimental tools for jet research, experiments have not yet solved astrophysical jet mysteries on their own.
NEW ASTRONOMY REVIEWS
(2022)
Article
Physics, Fluids & Plasmas
A. Lees, R. Betti, J. P. Knauer, V. Gopalaswamy, D. Patel, K. M. Woo, K. S. Anderson, E. M. Campbell, D. Cao, J. Carroll-Nellenback, R. Epstein, C. J. Forrest, V. N. Goncharov, D. R. Harding, S. X. Hu, I. V. Igumenshchev, R. T. Janezic, O. M. Mannion, P. B. Radha, S. P. Regan, A. Shvydky, R. C. Shah, W. T. Shmayda, C. Stoeckl, W. Theobald, C. A. Thomas
Summary: A physics-based statistical mapping approach was used to extract and quantify the major sources of degradation of fusion yield in direct-drive implosions on the OMEGA laser. The yield was found to be dependent on the age of the fill, implosion core asymmetry, laser beam-to-target size ratio, and hydrodynamic stability parameters. A new implosion design was created, guided by the mapping model, resulting in increased fusion yield in targets with larger diameters.
PHYSICS OF PLASMAS
(2023)
Article
Astronomy & Astrophysics
Orsola De Marco, Muhammad Akashi, Stavros Akras, Javier Alcolea, Isabel Aleman, Philippe Amram, Bruce Balick, Elvire De Beck, Eric G. Blackman, Henri M. J. Boffin, Panos Boumis, Jesse Bublitz, Beatrice Bucciarelli, Valentin Bujarrabal, Jan Cami, Nicholas Chornay, You-Hua Chu, Romano L. M. Corradi, Adam Frank, D. A. Garcia-Hernandez, Jorge Garcia-Rojas, Guillermo Garcia-Segura, Veronica Gomez-Llanos, Denise R. Goncalves, Martin A. Guerrero, David Jones, Amanda Karakas, Joel H. Kastner, Sun Kwok, Foteini Lykou, Arturo Manchado, Mikako Matsuura, Iain McDonald, Brent Miszalski, Shazrene S. Mohamed, Ana Monreal-Ibero, Hektor Monteiro, Rodolfo Montez, Paula Moraga Baez, Christophe Morisset, Jason Nordhaus, Claudia Mendes de Oliveira, Zara Osborn, Masaaki Otsuka, Quentin A. Parker, Els Peeters, Bruno C. Quint, Guillermo Quintana-Lacaci, Matt Redman, Ashley J. Ruiter, Laurence Sabin, Raghvendra Sahai, Carmen Sanchez Contreras, Miguel Santander-Garcia, Ivo Seitenzahl, Noam Soker, Angela K. Speck, Letizia Stanghellini, Wolfgang Steffen, Jesus A. Toala, Toshiya Ueta, Griet Van de Steene, Hans Van Winckel, Paolo Ventura, Eva Villaver, Wouter Vlemmings, Jeremy R. Walsh, Roger Wesson, Albert A. Zijlstra
Summary: Planetary nebulae offer insights into the final stages of most stars' lives. By analyzing images of the NGC 3132 planetary nebula taken by the JWST, researchers have discovered spiral structures and a dusty disk around the central star. These findings shed light on the complex processes involved in stellar outflows and provide a foundation for future observations of planetary nebulae.
Article
Physics, Multidisciplinary
Shu Zhang, Abraham Chien, Lan Gao, Hantao Ji, Eric G. Blackman, Russ Follett, Dustin H. Froula, Joseph Katz, Chikang Li, Andrew Birkel, Richard Petrasso, John Moody, Hui Chen
Summary: Magnetic reconnection converts magnetic energy into thermal and kinetic energy in plasma. Ion acoustic bursts followed by electron acoustic bursts are observed in a laboratory experiment, indicating the importance of ion and electron acoustic dynamics during reconnection.
Article
Physics, Fluids & Plasmas
H. Yin, J. K. Shang, E. G. Blackman, G. W. Collins, H. Aluie
Summary: This study demonstrates a methodology for diagnosing multiscale dynamics and energy transfer in complex HED flows, and applies it to compare kinetic energy transfer in 2D and 3D laser-driven plasma jet simulations. It reveals a spurious energy issue in 2D modeling that is absent in the 3D model.
PHYSICS OF PLASMAS
(2023)