Follow-Up of Extended Shells around B[e] Stars
B[e] stars are massive B type emission line stars in different evolutionary stages ranging from pre-main sequence to post-main sequence. Due to their mass loss and ejection events these objects deposit huge amounts of mass and energy into their environment and enrich it with chemically processed mat...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-03-01
|
| Series: | Galaxies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4434/10/2/41 |
| _version_ | 1797434678274162688 |
|---|---|
| author | Tiina Liimets Michaela Kraus Alexei Moiseev Nicolas Duronea Lydia Sonia Cidale Cecilia Fariña |
| author_facet | Tiina Liimets Michaela Kraus Alexei Moiseev Nicolas Duronea Lydia Sonia Cidale Cecilia Fariña |
| author_sort | Tiina Liimets |
| collection | DOAJ |
| description | B[e] stars are massive B type emission line stars in different evolutionary stages ranging from pre-main sequence to post-main sequence. Due to their mass loss and ejection events these objects deposit huge amounts of mass and energy into their environment and enrich it with chemically processed material, contributing significantly to the chemical and dynamical evolution of their host galaxies. However, the large-scale environments of these enigmatic objects have not attracted much attention. The first and so far only catalog reporting the detection of extended shells around a sample of B[e] stars was an H<i>α</i> imaging survey carried out in the year 2001, and was limited to bright targets in the northern hemisphere. We have recently started a follow-up of those targets to detect possible evolution of their nebulae in the plane of the sky over a baseline of two decades. Furthermore, we extend our survey to southern targets and fainter northern ones to complement and complete our knowledge on large-scale ejecta surrounding B[e] stars. Besides imaging in H<i>α</i> and selected nebular lines, we utilize long-slit and 3D spectral observations across the nebulae to derive their physical properties. We discovered pronounced nebula structures around 15 more objects, resulting in a total of 27 B[e] stars with a large-scale nebula. Here we present our (preliminary) results for three selected objects: the two massive supergiants MWC137 and MWC 314, and the unclassified B[e] star MWC 819. |
| first_indexed | 2024-03-09T10:35:56Z |
| format | Article |
| id | doaj.art-2b6994eab118496b806588f56407a9ce |
| institution | Directory Open Access Journal |
| issn | 2075-4434 |
| language | English |
| last_indexed | 2024-03-09T10:35:56Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Galaxies |
| spelling | doaj.art-2b6994eab118496b806588f56407a9ce2023-12-01T20:55:34ZengMDPI AGGalaxies2075-44342022-03-011024110.3390/galaxies10020041Follow-Up of Extended Shells around B[e] StarsTiina Liimets0Michaela Kraus1Alexei Moiseev2Nicolas Duronea3Lydia Sonia Cidale4Cecilia Fariña5Astronomical Institute, Czech Academy of Sciences, Fričova 298, 25165 Ondrejov, Czech RepublicAstronomical Institute, Czech Academy of Sciences, Fričova 298, 25165 Ondrejov, Czech RepublicSpecial Astrophysical Observatory, Russian Academy of Sciences, 369167 Nizhnii Arkhyz, RussiaInstituto de Astrofísica de La Plata (CCT La Plata—CONICET, UNLP), Paseo del Bosque S/N, La Plata B1900FWA, Buenos Aires, ArgentinaInstituto de Astrofísica de La Plata (CCT La Plata—CONICET, UNLP), Paseo del Bosque S/N, La Plata B1900FWA, Buenos Aires, ArgentinaIsaac Newton Group, Apartado de Correos 321, 38700 Santa Cruz de La Palma, Canary Islands, SpainB[e] stars are massive B type emission line stars in different evolutionary stages ranging from pre-main sequence to post-main sequence. Due to their mass loss and ejection events these objects deposit huge amounts of mass and energy into their environment and enrich it with chemically processed material, contributing significantly to the chemical and dynamical evolution of their host galaxies. However, the large-scale environments of these enigmatic objects have not attracted much attention. The first and so far only catalog reporting the detection of extended shells around a sample of B[e] stars was an H<i>α</i> imaging survey carried out in the year 2001, and was limited to bright targets in the northern hemisphere. We have recently started a follow-up of those targets to detect possible evolution of their nebulae in the plane of the sky over a baseline of two decades. Furthermore, we extend our survey to southern targets and fainter northern ones to complement and complete our knowledge on large-scale ejecta surrounding B[e] stars. Besides imaging in H<i>α</i> and selected nebular lines, we utilize long-slit and 3D spectral observations across the nebulae to derive their physical properties. We discovered pronounced nebula structures around 15 more objects, resulting in a total of 27 B[e] stars with a large-scale nebula. Here we present our (preliminary) results for three selected objects: the two massive supergiants MWC137 and MWC 314, and the unclassified B[e] star MWC 819.https://www.mdpi.com/2075-4434/10/2/41circumstellar matterstars: individual (MWC 137, MWC 314, MWC 819)stars: massive—supergiants |
| spellingShingle | Tiina Liimets Michaela Kraus Alexei Moiseev Nicolas Duronea Lydia Sonia Cidale Cecilia Fariña Follow-Up of Extended Shells around B[e] Stars Galaxies circumstellar matter stars: individual (MWC 137, MWC 314, MWC 819) stars: massive—supergiants |
| title | Follow-Up of Extended Shells around B[e] Stars |
| title_full | Follow-Up of Extended Shells around B[e] Stars |
| title_fullStr | Follow-Up of Extended Shells around B[e] Stars |
| title_full_unstemmed | Follow-Up of Extended Shells around B[e] Stars |
| title_short | Follow-Up of Extended Shells around B[e] Stars |
| title_sort | follow up of extended shells around b e stars |
| topic | circumstellar matter stars: individual (MWC 137, MWC 314, MWC 819) stars: massive—supergiants |
| url | https://www.mdpi.com/2075-4434/10/2/41 |
| work_keys_str_mv | AT tiinaliimets followupofextendedshellsaroundbestars AT michaelakraus followupofextendedshellsaroundbestars AT alexeimoiseev followupofextendedshellsaroundbestars AT nicolasduronea followupofextendedshellsaroundbestars AT lydiasoniacidale followupofextendedshellsaroundbestars AT ceciliafarina followupofextendedshellsaroundbestars |