The inside-out planetary nebula around a born-again star
Planetary nebulae are ionized clouds of gas formed by the hydrogen-rich envelopes of low- and intermediate-mass stars ejected at late evolutionary stages. The strong UV flux from their central stars causes a highly stratified ionization structure, with species of higher ionization potential closer t...
| Autores principales: | , , , , , , , , , , |
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| Formato: | Articulo Preprint |
| Lenguaje: | Inglés |
| Publicado: |
2018
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/125363 |
| Aporte de: |
| id |
I19-R120-10915-125363 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Astronómicas Physics Brightness Star (graph theory) Stars Flux Ionization Shell (structure) Astrophysics Ejecta Planetary nebula Stellar evolution Interstellar medium |
| spellingShingle |
Ciencias Astronómicas Physics Brightness Star (graph theory) Stars Flux Ionization Shell (structure) Astrophysics Ejecta Planetary nebula Stellar evolution Interstellar medium Guerrero, Martín A. Fang, Xuan Miller Bertolami, Marcelo Miguel Ramos-Larios, Gerardo Todt, Helge Alarie, Alexandre Sabin, Laurence Miranda, Luis F. Morisset, Christophe Kehrig, C. Zavala, S. The inside-out planetary nebula around a born-again star |
| topic_facet |
Ciencias Astronómicas Physics Brightness Star (graph theory) Stars Flux Ionization Shell (structure) Astrophysics Ejecta Planetary nebula Stellar evolution Interstellar medium |
| description |
Planetary nebulae are ionized clouds of gas formed by the hydrogen-rich envelopes of low- and intermediate-mass stars ejected at late evolutionary stages. The strong UV flux from their central stars causes a highly stratified ionization structure, with species of higher ionization potential closer to the star. Here we report on the exceptional case of HuBi 1, a double-shell planetary nebula whose inner shell presents emission from low-ionization species close to the star and emission from high-ionization species farther away. Spectral analysis demonstrates that the inner shell of HuBi 1 is excited by shocks, whereas its outer shell is recombining. The anomalous excitation of these shells can be traced to its low-temperature [WC10] central star whose optical brightness has declined continuously by 10 magnitudes in a period of 46 years. Evolutionary models reveal that this star is the descendent of a low-mass star (≃1.1 M⊙) that has experienced a born-again event whose ejecta shock-excite the inner shell. HuBi 1 represents the missing link in the formation of metal-rich central stars of planetary nebulae from low-mass progenitors, offering unique insight regarding the future evolution of the born-again Sakurai's object. Coming from a solar-mass progenitor, HuBi 1 represents a potential end-state for our Sun. |
| format |
Articulo Preprint |
| author |
Guerrero, Martín A. Fang, Xuan Miller Bertolami, Marcelo Miguel Ramos-Larios, Gerardo Todt, Helge Alarie, Alexandre Sabin, Laurence Miranda, Luis F. Morisset, Christophe Kehrig, C. Zavala, S. |
| author_facet |
Guerrero, Martín A. Fang, Xuan Miller Bertolami, Marcelo Miguel Ramos-Larios, Gerardo Todt, Helge Alarie, Alexandre Sabin, Laurence Miranda, Luis F. Morisset, Christophe Kehrig, C. Zavala, S. |
| author_sort |
Guerrero, Martín A. |
| title |
The inside-out planetary nebula around a born-again star |
| title_short |
The inside-out planetary nebula around a born-again star |
| title_full |
The inside-out planetary nebula around a born-again star |
| title_fullStr |
The inside-out planetary nebula around a born-again star |
| title_full_unstemmed |
The inside-out planetary nebula around a born-again star |
| title_sort |
inside-out planetary nebula around a born-again star |
| publishDate |
2018 |
| url |
http://sedici.unlp.edu.ar/handle/10915/125363 |
| work_keys_str_mv |
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Repositorios |
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