J/A+A/440/595 RW Aur spectra (Alencar+, 2005)
The extreme T Tauri star RW Aur: accretion and outflow variability.
Alencar S.H.P., Basri G., Hartmann L., Calvet N.
<Astron. Astrophys., 440, 595-608 (2005)>
=2005A&A...440..595A 2005A&A...440..595A
ADC_Keywords: Stars, pre-main sequence ; Spectroscopy
Keywords: line: profiles - stars: formation - stars: pre-main sequence -
stars: winds, outflows - stars: individual: RW Aur
Abstract:
We present an analysis of the classical T Tauri star RW Aur A, based
on 77 echelle spectra obtained at Lick Observatory over a decade of
observations. RW Aur, which has a higher than average mass accretion
rate among T Tauri stars, exhibits permitted (Halpha, Hbeta, Ca II,
He I, NaD) and forbidden ([OI]6300Å) emission lines with strong
variability. The permitted lines display multiple periodicities over
the years, often with variable accretion (redshifted) and outflow
(blueshifted) absorption components, implying that both processes are
active and changing in this system. The broad components of the
different emission lines exhibit correlated behavior, indicating a
common origin for all of them. We compute simple magnetospheric
accretion and disk-wind Halpha, Hbeta and NaD line profiles for
RW Aur. The observed Balmer emission lines do not have magnetospheric
accretion line profiles. Our modeling indicates that the wind
contribution to these line profiles is very important and must be
taken into account. Our results indicate that the Halpha, Hbeta
and NaD observed line profiles of RW Aur are better reproduced by
collimated disk-winds starting from a small region near the disk inner
radius.
Description:
The observations, obtained over a decade, were carried out at Lick
Observatory.
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* A major hard disk failure on the author's workstation containing *
* the FITS files of the spectra made the files actually unavailable *
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Objects:
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RA (2000) DE Designation(s)
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05 07 49.6 +30 24 05 RW Aur = HD 240764
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 31 77 Journal of observations
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- ObsNo Observation number
4- 13 A10 "YYYY/MM/DD" Obs.date UT date of observation
15- 19 A5 "h:m" Obs.time UT date of observation
21- 31 F11.3 d JD Julian date of observation
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 27-Jul-2006