Research output: Contribution to journal › Article › peer-review
X-ray emission from Ae/Be Herbig stars due to disc-stellar magnetosphere interaction. / Холтыгин, Александр Федорович; Рыспаева, Е.Б.; Maxim, Lyutikov.
In: Monthly Notices of the Royal Astronomical Society, Vol. 521, No. 2, 14.03.2023, p. 2427-2438.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - X-ray emission from Ae/Be Herbig stars due to disc-stellar magnetosphere interaction
AU - Холтыгин, Александр Федорович
AU - Рыспаева, Е.Б.
AU - Maxim, Lyutikov
PY - 2023/3/14
Y1 - 2023/3/14
N2 - We reanalyse archival X-ray data of 16 Ae/Be Herbig stars obtained by the XMM-Newton and Chandra satellites. Stellar X-ray spectra in the energy range 0.2-8 keV were fitted with the use of APEC and MEKAL hot plasma emission models, and with models with an additional power-law component. We find that for Herbig stars, the dependence of the unabsorbed X-ray luminosity on stellar mass and radius, LX ∝ RαMβ with α ≈ 3 and β ≈ 2, is similar to that for T Tauri stars. The independently determined accretion rates, rotation periods, and the surface magnetic fields follow a tight correlation predicted by the standard magnetospheric accretion theory. We suggest that X-ray emission from Herbig stars is powered by magnetic reconnection events in the tenuous corona at the disc-magnetosphere boundary.
AB - We reanalyse archival X-ray data of 16 Ae/Be Herbig stars obtained by the XMM-Newton and Chandra satellites. Stellar X-ray spectra in the energy range 0.2-8 keV were fitted with the use of APEC and MEKAL hot plasma emission models, and with models with an additional power-law component. We find that for Herbig stars, the dependence of the unabsorbed X-ray luminosity on stellar mass and radius, LX ∝ RαMβ with α ≈ 3 and β ≈ 2, is similar to that for T Tauri stars. The independently determined accretion rates, rotation periods, and the surface magnetic fields follow a tight correlation predicted by the standard magnetospheric accretion theory. We suggest that X-ray emission from Herbig stars is powered by magnetic reconnection events in the tenuous corona at the disc-magnetosphere boundary.
UR - https://ui.adsabs.harvard.edu/abs/2023MNRAS.521.2427R/abstract
UR - https://www.mendeley.com/catalogue/93129059-711a-3365-96c0-b5117bee1d28/
U2 - 10.1093/mnras/stad629
DO - 10.1093/mnras/stad629
M3 - Article
VL - 521
SP - 2427
EP - 2438
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 2
ER -
ID: 104089991