Examining magnetospheric accretion in Herbig Ae/Be stars through near-infrared spectroscopic signatures

M. Schoeller, S. Hubrig, M. Pogodin, S.P. Jarvinen, Наталия Алексеевна Драке, J.A. Cahuasqui

Research outputpeer-review

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Abstract

Models of magnetically driven accretion and outflows reproduce many observational properties of T Tauri stars. For the more massive Herbig Ae/Be stars, the corresponding picture is not well established. Nonetheless, it is expected that accretion flows in pre-main-sequence stars are guided from the circumstellar disk to stellar regions of high latitude along the magnetic field lines inside a magnetosphere. Using near-infrared multi-epoch spectroscopic data obtained with ISAAC, CRIRES, and X-shooter on the VLT, we examined magnetospheric accretion in the two Herbig Ae stars HD101412 and HD104237. Spectroscopic signatures in He I 10830 and Pa_gamma, two near-infrared lines that are formed in a Herbig star's accretion region, show temporal modulation in both objects. For HD101412, this modulation is governed by its rotation period, which we could recover from the data. We could show that our spectroscopic observations can be explained within the magnetic geometry that we established earlier from magnetic field measurements. For HD104237, we struggled to clearly identify a rotation period. We intend to apply this method to a larger sample of Herbig Ae/Be stars to learn more about their rotation properties and the accretion mechanisms at work.
Original languageEnglish
Title of host publicationExamining magnetospheric accretion in Herbig Ae/Be stars through near-infrared spectroscopic signatures
Number of pages6
Publication statusPublished - 13 Jan 2019
EventRadiative signatures from the Cosmos: A meeting in honor of Ivan Hubeny", 2018 October 23-26, Paris, France - Auditorium of the Sorbonne University 4 Place Jussieu, 75005 Paris, Париж
Duration: 23 Oct 201826 Oct 2018
https://radcosmos.sciencesconf.org/

Publication series

NameAstronomical Society of the Pacific Conference Series (ASPCS)

Conference

ConferenceRadiative signatures from the Cosmos: A meeting in honor of Ivan Hubeny", 2018 October 23-26, Paris, France
CountryFrance
CityПариж
Period23/10/1826/10/18
Internet address

Scopus subject areas

  • Astronomy and Astrophysics

Cite this

Schoeller, M., Hubrig, S., Pogodin, M., Jarvinen, S. P., Драке, Н. А., & Cahuasqui, J. A. (2019). Examining magnetospheric accretion in Herbig Ae/Be stars through near-infrared spectroscopic signatures. In Examining magnetospheric accretion in Herbig Ae/Be stars through near-infrared spectroscopic signatures (Astronomical Society of the Pacific Conference Series (ASPCS)).
Schoeller, M. ; Hubrig, S. ; Pogodin, M. ; Jarvinen, S.P. ; Драке, Наталия Алексеевна ; Cahuasqui, J.A. . / Examining magnetospheric accretion in Herbig Ae/Be stars through near-infrared spectroscopic signatures. Examining magnetospheric accretion in Herbig Ae/Be stars through near-infrared spectroscopic signatures. 2019. (Astronomical Society of the Pacific Conference Series (ASPCS)).
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keywords = "звезды до главной последовательности, магнитные поля звезд, звезды Ае/Ве Хербига, магнитосферная аккреция",
author = "M. Schoeller and S. Hubrig and M. Pogodin and S.P. Jarvinen and Драке, {Наталия Алексеевна} and J.A. Cahuasqui",
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Schoeller, M, Hubrig, S, Pogodin, M, Jarvinen, SP, Драке, НА & Cahuasqui, JA 2019, Examining magnetospheric accretion in Herbig Ae/Be stars through near-infrared spectroscopic signatures. in Examining magnetospheric accretion in Herbig Ae/Be stars through near-infrared spectroscopic signatures. Astronomical Society of the Pacific Conference Series (ASPCS), Париж, 23/10/18.

Examining magnetospheric accretion in Herbig Ae/Be stars through near-infrared spectroscopic signatures. / Schoeller, M.; Hubrig, S.; Pogodin, M.; Jarvinen, S.P.; Драке, Наталия Алексеевна; Cahuasqui, J.A. .

Examining magnetospheric accretion in Herbig Ae/Be stars through near-infrared spectroscopic signatures. 2019. (Astronomical Society of the Pacific Conference Series (ASPCS)).

Research outputpeer-review

TY - CHAP

T1 - Examining magnetospheric accretion in Herbig Ae/Be stars through near-infrared spectroscopic signatures

AU - Schoeller, M.

AU - Hubrig, S.

AU - Pogodin, M.

AU - Jarvinen, S.P.

AU - Драке, Наталия Алексеевна

AU - Cahuasqui, J.A.

PY - 2019/1/13

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N2 - Models of magnetically driven accretion and outflows reproduce many observational properties of T Tauri stars. For the more massive Herbig Ae/Be stars, the corresponding picture is not well established. Nonetheless, it is expected that accretion flows in pre-main-sequence stars are guided from the circumstellar disk to stellar regions of high latitude along the magnetic field lines inside a magnetosphere. Using near-infrared multi-epoch spectroscopic data obtained with ISAAC, CRIRES, and X-shooter on the VLT, we examined magnetospheric accretion in the two Herbig Ae stars HD101412 and HD104237. Spectroscopic signatures in He I 10830 and Pa_gamma, two near-infrared lines that are formed in a Herbig star's accretion region, show temporal modulation in both objects. For HD101412, this modulation is governed by its rotation period, which we could recover from the data. We could show that our spectroscopic observations can be explained within the magnetic geometry that we established earlier from magnetic field measurements. For HD104237, we struggled to clearly identify a rotation period. We intend to apply this method to a larger sample of Herbig Ae/Be stars to learn more about their rotation properties and the accretion mechanisms at work.

AB - Models of magnetically driven accretion and outflows reproduce many observational properties of T Tauri stars. For the more massive Herbig Ae/Be stars, the corresponding picture is not well established. Nonetheless, it is expected that accretion flows in pre-main-sequence stars are guided from the circumstellar disk to stellar regions of high latitude along the magnetic field lines inside a magnetosphere. Using near-infrared multi-epoch spectroscopic data obtained with ISAAC, CRIRES, and X-shooter on the VLT, we examined magnetospheric accretion in the two Herbig Ae stars HD101412 and HD104237. Spectroscopic signatures in He I 10830 and Pa_gamma, two near-infrared lines that are formed in a Herbig star's accretion region, show temporal modulation in both objects. For HD101412, this modulation is governed by its rotation period, which we could recover from the data. We could show that our spectroscopic observations can be explained within the magnetic geometry that we established earlier from magnetic field measurements. For HD104237, we struggled to clearly identify a rotation period. We intend to apply this method to a larger sample of Herbig Ae/Be stars to learn more about their rotation properties and the accretion mechanisms at work.

KW - звезды до главной последовательности

KW - магнитные поля звезд

KW - звезды Ае/Ве Хербига

KW - магнитосферная аккреция

UR - http://adsabs.harvard.edu/abs/2019arXiv190103978S

M3 - Article in an anthology

T3 - Astronomical Society of the Pacific Conference Series (ASPCS)

BT - Examining magnetospheric accretion in Herbig Ae/Be stars through near-infrared spectroscopic signatures

ER -

Schoeller M, Hubrig S, Pogodin M, Jarvinen SP, Драке НА, Cahuasqui JA. Examining magnetospheric accretion in Herbig Ae/Be stars through near-infrared spectroscopic signatures. In Examining magnetospheric accretion in Herbig Ae/Be stars through near-infrared spectroscopic signatures. 2019. (Astronomical Society of the Pacific Conference Series (ASPCS)).