Fairlamb, JR, Oudmaijer, RD, Mendigutia, I et al. (2 more authors) (2017) A spectroscopic survey of Herbig Ae/Be stars with X-Shooter II: Accretion diagnostic lines. Monthly Notices of the Royal Astronomical Society, 464 (4). pp. 4721-4735. ISSN 0035-8711
Abstract
The Herbig Ae/Be stars (HAeBes) allow an exploration of the properties of Pre- Main Sequence(PMS) stars above the low-mass range (< 2M ) and those bordering the high-mass range (> 8M ). This paper is the second in a series exploring accretion in 91 HAeBes with Very Large Telescope/X-shooter spectra. Equivalent width mea- surements are carried out on 32 di erent lines, spanning the UV to NIR, in order to obtain their line luminosities. The line luminosities were compared to accretion lumi- nosities, which were determined directly from measurements of an UV-excess. When detected, emission lines always demonstrate a correlation with the accretion lumi- nosity, regardless of detection frequency. The average relationship between accretion luminosity and line luminosity is found to be Lacc/Lline 1:16 0:15. This is in agree- ment with the ndings in Classical T Tauri stars, although the HAeBe relationship is generally steeper, particularly towards the Herbig Be mass range. Since all observed lines display a correlation with the accretion luminosity, all of them can be used as ac- cretion tracers. This has increased the number of accretion diagnostic lines in HAeBes tenfold. However, questions still remain on the physical origin of each line, which may not be due to accretion.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Editors: |
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Copyright, Publisher and Additional Information: | © 2016, The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | accretion; accretion discs; techniques: spectroscopic; stars: early-type; stars: formation; stars: pre-main sequence; stars: variables: T Tauri; Herbig Ae/Be |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Astrophysics (Leeds) |
Funding Information: | Funder Grant number Science & Technology Facilities Council (STFC) ST/M002160/1 Science & Technology Facilities Council (STFC) ST/I001557/1 Science & Technology Facilities Council (STFC) ST/L000628/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 21 Nov 2016 14:59 |
Last Modified: | 31 Oct 2017 21:26 |
Status: | Published |
Publisher: | Oxford University Press |
Identification Number: | 10.1093/mnras/stw2643 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:104734 |