J/A+AS/145/187 uvby-β photometry of WTTS (Chavarria-K+, 2000)
Photometric observations of weak-line T Tauri stars.
II. WTTS in Taurus-Auriga, Orion and Scorpius OB2-2.
Chavarria-K C., Terranegra L., Moreno-Corral M.A., de Lara E.
<Astron. Astrophys. Suppl. Ser. 145, 187 (2000)>
=2000A&AS..145..187C 2000A&AS..145..187C
ADC_Keywords: Stars, pre-main sequence ; X-ray sources ; Photometry, uvby, beta
Keywords: stars: activity - stars: evolution - stars: pre-main sequence
Abstract:
We present uvby-β photometry of 116 X-ray flux-selected active
stars in the directions of the Orion (40), Taurus-Auriga (58) and
Scorpius OB2-2 (18) star forming regions. Additionally, we give near
IR JHK photometry of 20 active stars in the Taurus-Auriga direction.
The program stars were selected from the ROSAT All Sky Survey and
EINSTEIN X-ray surveys and are spectroscopically confirmed weak-line T
Tauri stars and weak-line T Tauri star candidates. The photometry
confirms the young nature of the program stars and also indicates that
a significant fraction of the sample could be foreground objects. The
data given here probably represent the largest homogeneous uvby-β
photometric sample of new WTTS and WTTS candidates. Many objects in
the sample are observed photometrically for the first time.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 33 20 JHK photometry of new WTTS in Taurus-Auriga
table2.dat 52 40 uvby-β photometry of the WTTS in Orion
table3.dat 53 58 uvby-β photometry of the WTTS in Taurus-Auriga
table4.dat 52 18 uvby-β photometry of WTTS in Scorpius OB2-2
and in Ophiuchus
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See also:
J/A+A/297/391 : T Tauri stars ROSAT survey (Neuhaeuser+, 1995)
J/A+A/312/439 : New T Tauri stars in Taurus-Auriga (Wichmann+, 1996)
J/A+AS/123/329 : New weak-line T Tauri stars in Lupus (Krautter+ 1997)
J/A+AS/132/173 : New weak-line T Tauri stars in Taurus-Auriga (Li+ 1998)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name RXJ designation
12- 14 A3 --- m_Name Multiplicity index on Name
15 A1 --- n_Name [1-4] Note on RXJ (1)
17- 21 F5.2 mag Jmag J magnitude
23- 27 F5.2 mag Hmag H magnitude
29- 33 F5.2 mag Kmag K magnitude
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Note (1): Other names:
1: RXJ 0425.3+2618 = J4872
2: RXJ 0433.9+2613 = IT Tau
3: RXJ 0444.9+2717 = HD 283782
4: RXJ 0456.6+3150 = HD 282598
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Byte-by-byte Description of file: table[234].dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Designation (RXJ or HD/BD)
12 A1 --- m_Name [ABab] Multiplicity index on Name
13 A1 --- n_Name [l+*w] Note on RXJ (1)
15- 18 A4 --- SpType Spectral type
20- 24 F5.2 mag Vmag V magnitude
26- 29 F4.2 mag b-y b-y colour index
31- 35 F5.2 mag m1 ? m1 colour index
37- 41 F5.2 mag c1 c1 colour index
42 A1 --- u_c1 Uncertainty flag on c1
44- 47 F4.2 mag beta ? β index
49- 52 F4.2 mag AV Absorption in V band
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Note (1): l: After A96, the presence of LiI 6707Å dubious because of the low
S/N ratio of the spectrogram.
+: Classified as WTTS by Wichmann (1994, Ph.D. Dissertation,
Heidelberg, Germany)
*: 04253+2618, SpType = M0, W(Hα)=-2.26, = J4872
w: CTTS, after Walter, 1986ApJ...306..573W 1986ApJ...306..573W
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History: From A&A electronic version
References:
Alcala et al., Paper I 1996A&AS..119....7A 1996A&AS..119....7A
(End) Patricia Bauer [CDS] 26-Jul-2000