A spectroscopic survey of Herbig Ae/Be stars with X-Shooter II: Accretion diagnostic lines

Abstract

The Herbig Ae/Be stars (HAeBes) allow an exploration of the properties of Pre-Main Sequence(PMS) stars above the low-mass range ($<2{\mathrm{M}}_{\odot }$) and those bordering the high-mass range ($>8{\mathrm{M}}_{\odot }$). This paper is the second in a series exploring accretion in 91 HAeBes with Very Large Telescope/X-shooter spectra. Equivalent width measurements are carried out on 32 different lines, spanning the UV to NIR, in order to obtain their line luminosities. The line luminosities were compared to accretion luminosities, which were determined directly from measurements of an UV-excess. When detected, emission lines always demonstrate a correlation with the accretion luminosity, regardless of detection frequency. The average relationship between accretion luminosity and line luminosity is found to be $L_{\mathrm{acc}}\propto {L_{\mathrm{line}}}^{1.16\pm 0.15}$. This is in agreement with the findings 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 accretion 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.

arXiv comment16 pages, 4 figures

References in corpus (23)

• X-shooter, the new wide band intermediate resolution spectrograph at the ESO Very Large Telescope
• Molecfit: A general tool for telluric absorption correction. I. Method and application to ESO instruments
• ISO spectroscopy of circumstellar dust in 14 Herbig Ae/Be systems: towards an understanding of dust processing
• New Grids of ATLAS9 Model Atmospheres
• Molecfit: A general tool for telluric absorption correction II. Quantitative evaluation on ESO-VLT X-Shooter spectra
• X-Shooter spectroscopy of young stellar objects: IV -- Accretion in low-mass stars and sub-stellar objects in Lupus
• UV excess measures of accretion onto young very low-mass stars and brown dwarfs
• An extensive library of 2500-10500 Ang synthetic spectra
• Accretion Rates for T Tauri Stars Using Nearly Simultaneous Ultraviolet and Optical Spectra
• A spectroscopic survey of Herbig Ae/Be stars with X-Shooter I: Stellar parameters and accretion rates
• Magnetospheres and Disk Accretion in Herbig Ae/Be Stars
• The Structure and Emission of the Accretion Shock in T Tauri Stars II: the Ultraviolet Continuum Emission
• X-shooter spectroscopy of young stellar objects: I - Mass accretion rates of low-mass T Tauri stars in σOrionis
• [O I] 6300A emission in Herbig Ae/Be systems: signature of Keplerian rotation
• Probing the circumstellar structure of Herbig Ae/Be stars
• Accretion rates and accretion tracers of Herbig Ae/Be stars
• The RMS Survey: The Bolometric Fluxes and Luminosity Distributions of Young Massive Stars
• Probing the circumstellar structures of T Tauri stars and their relationship to those of Herbig stars
• Investigating the inner discs of Herbig Ae/Be stars with CO bandhead and Br Gamma emission
• Diagnosing Mass Flows Around Herbig Ae/Be Stars Using the He I 10830 Line
• Accretion variability of Herbig Ae/Be stars observed by X-Shooter. HD 31648 and HD 163296
• On the origin of the correlations between the accretion luminosity and emission line luminosities in pre-main sequence stars
• Optical Mass Flow Diagnostics in Herbig Ae/Be Stars

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