J/ApJ/657/884 Spectroscopy of TTau and Herbig Ae/Be candidates (Lee+, 2007)
Triggered star formation by massive stars.
Lee H.-T., Chen W.P.
<Astrophys. J., 657, 884-896 (2007)>
=2007ApJ...657..884L 2007ApJ...657..884L
ADC_Keywords: Associations, stellar ; Stars, pre-main sequence ; Spectroscopy
Keywords: ISM: clouds - ISM: molecules - stars: formation -
stars: pre-main sequence
Abstract:
We present our diagnosis of the role that massive stars play in the
formation of low- and intermediate-mass stars in OB associations (the
lambda Ori region, Ori OB1, and Lac OB1 associations).
Description:
The spectra of bright CTTS and HAeBe candidates were taken at the
Beijing Astronomical Observatory (BAO) and at the Kitt Peak National
Observatory (KPNO). At the BAO, low-dispersion spectra with a
dispersion of 200Å/mm, corresponding to 4.8Å/pix, were taken
with the 2.16m optical telescope from 2003 October 31 to November 3,
and on 2004 September 5-6.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 125 40 CTTS and CTTS Candidates
table4.dat 87 13 Herbig Ae/Be Stars
table5.dat 66 46 Non-PMS Stars
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- [LC2007] Sequential number (G1)
4- 20 A17 --- 2MASS 2MASS designation (JHHMMSSss+DDMMSSs)
22- 60 A39 --- EmLines Emission line(s) (G2)
62 A1 --- Li [ANL] Li lines presence (3)
64- 67 A4 --- Obs [K, B] Observation (K=KPNO, B=BAO)
69-125 A57 --- Rem Remarks
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Note (3): Presence of Lithium as follows:
A = absorption
N = no absorption
L = low spectral resolution in BAO
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- [LC2007] Sequential number (G1)
4- 20 A17 --- 2MASS 2MASS designation (JHHMMSSss+DDMMSSs)
22- 28 A7 --- EmLines Emission line(s) (G2)
30- 32 A3 --- SpT Spectral type
34- 37 A4 --- Obs [K, B] Observation (K=KPNO, B=BAO)
39- 87 A49 --- Rem Remarks
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- [LC2007] Sequential number
4- 20 A17 --- 2MASS 2MASS designation (JHHMMSSss+DDMMSSs)
22- 28 A7 --- SpT Spectral type
30- 33 A4 --- Obs [K, B] Observation (K=KPNO, B=BAO)
35- 66 A32 --- Rem Remarks
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Global notes:
Note (G1): Stars 1-31 and 41-48 are in the Orion region,
stars 32-40 and 49-53 are in the Lacerta region.
Note (G2): Line definition abbreviations:
H = Hα
Ca = CaII [K,H (3934,3968Å),
and/or IR triplet (8498,8542,8662Å)]
He = He (5876Å)
O = [OI] (6300Å)
S = [SII] (6717 Å)
Fe = FeII (4924 Å)
The number following H, O, S, are the equivalent widths of Hα,
[OI], and [SII], in angstrom units, respectively.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 29-May-2009