Searching for Magnetospheres around Herbig Ae/Be Stars
We describe four different approaches for the detection of magnetospheric accretion among Herbig Ae/Be stars with accretion disks. Studies of several unique objects have been carried out. One of the objects is the Herbig Ae star HD 101412 with a comparatively strong magnetic field. The second is the...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-12-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/7/12/489 |
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| author | Mikhail Pogodin Natalia Drake Nina Beskrovnaya Sergei Pavlovskiy Swetlana Hubrig Markus Schöller Silva Järvinen Olesya Kozlova Ilya Alekseev |
| author_facet | Mikhail Pogodin Natalia Drake Nina Beskrovnaya Sergei Pavlovskiy Swetlana Hubrig Markus Schöller Silva Järvinen Olesya Kozlova Ilya Alekseev |
| author_sort | Mikhail Pogodin |
| collection | DOAJ |
| description | We describe four different approaches for the detection of magnetospheric accretion among Herbig Ae/Be stars with accretion disks. Studies of several unique objects have been carried out. One of the objects is the Herbig Ae star HD 101412 with a comparatively strong magnetic field. The second is the early-type Herbig B6e star HD 259431. The existence of a magnetosphere in these objects was not recognized earlier. In both cases, a periodicity in the variation of some line parameters, originating near the region of the disk/star interaction, has been found. The third object is the young binary system HD 104237, hosting a Herbig Ae star and a T Tauri star. Based on the discovery of periodic variations of equivalent widths of atmospheric lines in the spectrum of the primary, we have concluded that the surface of the star is spotted. Comparing our result with an earlier one, we argue that these spots can be connected with the infall of material from the disk onto the stellar surface through a magnetosphere. The fourth example is the Herbig Ae/Be star HD 37806. Signatures of magnetospheric accretion in this object have been identified using a different method. They were inferred from the short-term variability of the He <span style="font-variant: small-caps;">i</span> <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>λ</mi></semantics></math></inline-formula>5876 line profile forming in the region of the disk/star interaction. |
| first_indexed | 2024-03-10T03:57:19Z |
| format | Article |
| id | doaj.art-af99d04c2a414119ba9eaaae9976e628 |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-03-10T03:57:19Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-af99d04c2a414119ba9eaaae9976e6282023-11-23T10:52:42ZengMDPI AGUniverse2218-19972021-12-0171248910.3390/universe7120489Searching for Magnetospheres around Herbig Ae/Be StarsMikhail Pogodin0Natalia Drake1Nina Beskrovnaya2Sergei Pavlovskiy3Swetlana Hubrig4Markus Schöller5Silva Järvinen6Olesya Kozlova7Ilya Alekseev8Central Astronomical Observatory at Pulkovo, 196140 Saint-Petersburg, RussiaLaboratory of Observational Astrophysics, Saint Petersburg State University, Universitetski pr. 28, 198504 Saint-Petersburg, RussiaCentral Astronomical Observatory at Pulkovo, 196140 Saint-Petersburg, RussiaCentral Astronomical Observatory at Pulkovo, 196140 Saint-Petersburg, RussiaLeibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482 Potsdam, GermanyEuropean Southern Observatory (ESO), Karl-Schwarzschild-Str. 2, 85748 Garching, GermanyLeibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482 Potsdam, GermanyCrimean Astrophysical Observatory, Russian Academy of Sciences, 298409 Nauchny, RussiaCrimean Astrophysical Observatory, Russian Academy of Sciences, 298409 Nauchny, RussiaWe describe four different approaches for the detection of magnetospheric accretion among Herbig Ae/Be stars with accretion disks. Studies of several unique objects have been carried out. One of the objects is the Herbig Ae star HD 101412 with a comparatively strong magnetic field. The second is the early-type Herbig B6e star HD 259431. The existence of a magnetosphere in these objects was not recognized earlier. In both cases, a periodicity in the variation of some line parameters, originating near the region of the disk/star interaction, has been found. The third object is the young binary system HD 104237, hosting a Herbig Ae star and a T Tauri star. Based on the discovery of periodic variations of equivalent widths of atmospheric lines in the spectrum of the primary, we have concluded that the surface of the star is spotted. Comparing our result with an earlier one, we argue that these spots can be connected with the infall of material from the disk onto the stellar surface through a magnetosphere. The fourth example is the Herbig Ae/Be star HD 37806. Signatures of magnetospheric accretion in this object have been identified using a different method. They were inferred from the short-term variability of the He <span style="font-variant: small-caps;">i</span> <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>λ</mi></semantics></math></inline-formula>5876 line profile forming in the region of the disk/star interaction.https://www.mdpi.com/2218-1997/7/12/489Herbig Ae/Be starsdisk accretionmagnetosphereindividual: HD 10141HD 259431HD 104237 |
| spellingShingle | Mikhail Pogodin Natalia Drake Nina Beskrovnaya Sergei Pavlovskiy Swetlana Hubrig Markus Schöller Silva Järvinen Olesya Kozlova Ilya Alekseev Searching for Magnetospheres around Herbig Ae/Be Stars Universe Herbig Ae/Be stars disk accretion magnetosphere individual: HD 10141 HD 259431 HD 104237 |
| title | Searching for Magnetospheres around Herbig Ae/Be Stars |
| title_full | Searching for Magnetospheres around Herbig Ae/Be Stars |
| title_fullStr | Searching for Magnetospheres around Herbig Ae/Be Stars |
| title_full_unstemmed | Searching for Magnetospheres around Herbig Ae/Be Stars |
| title_short | Searching for Magnetospheres around Herbig Ae/Be Stars |
| title_sort | searching for magnetospheres around herbig ae be stars |
| topic | Herbig Ae/Be stars disk accretion magnetosphere individual: HD 10141 HD 259431 HD 104237 |
| url | https://www.mdpi.com/2218-1997/7/12/489 |
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