J/AJ/139/1338 UV-selected stars in Tau and Upper Sco (Findeisen+, 2010)
Ultraviolet-selected field and pre-main-sequence stars toward Taurus and
upper Scorpius.
Findeisen K., Hillenbrand L.
<Astron. J., 139, 1338-1359 (2010)>
=2010AJ....139.1338F 2010AJ....139.1338F
ADC_Keywords: Associations, stellar ; Stars, pre-main sequence ;
Photometry, ultraviolet ; Photometry, infrared
Keywords: Galaxy: stellar content - stars: activity - stars: pre-main sequence -
ultraviolet: stars
Abstract:
We have carried out a Galaxy Evolution Explorer (GALEX) Cycle 1 guest
investigator program covering 56deg2 near the Taurus T association
and 12deg2 along the northern edge of the Upper Scorpius OB
association. We combined photometry in the GALEX far-ultraviolet and
near-ultraviolet bands with data from the Two Micron All Sky Survey to
identify candidate young (≲100Myr old) stars as those with an
ultraviolet excess relative to older main-sequence stars. Follow-up
spectroscopy of a partial sample of these candidates suggests five new
members of Taurus, with 8-20 expected from additional observations,
and five new members of Upper Scorpius, with three to six expected
from additional observations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table6.dat 188 567 Sources with a 3σ or greater UV excess
in at least one band
table8.dat 147 64 UV excess stars observed at Palomar
table11.dat 66 9 *Spectroscopic candidate members of Taurus and
Upper Scorpius
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Note on table11.dat: These are the emission-line stars with spectral type and
CMD location consistent with Taurus or Upper Scorpius membership. We also
present proper motions and errors calculated by A. Kraus (2009, private
communication) from published positions along with a qualitative indication
of whether the proper motion is consistent with membership in the Taurus or
Upper Scorpius association, respectively.
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- 2MASS 2MASS identification (HHMMSSss+DDMMSSs, J2000)
18- 27 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000)
29- 38 F10.6 deg DEdeg Declination in decimal degrees (J2000)
40- 57 A18 --- GALEX GALEX tile identification
59- 64 F6.3 mag FUV ? GALEX FUV band AB magnitude
66- 70 F5.3 mag e_FUV ? The 1σ uncertainty in FUV
72- 77 F6.3 mag NUV ? GALEX NUV band AB magnitude
79- 83 F5.3 mag e_NUV ? The 1σ uncertainty in NUV
85- 90 F6.3 mag Jmag 2MASS J band Vega magnitude
92- 96 F5.3 mag e_Jmag The 1σ uncertainty in Jmag
98-103 F6.3 mag Hmag 2MASS H band Vega magnitude
105-109 F5.3 mag e_Hmag The 1σ uncertainty in Hmag
111-116 F6.3 mag Ksmag 2MASS Ks band Vega magnitude
118-122 F5.3 mag e_Ksmag The 1σ uncertainty in Ksmag
124-126 A3 --- Qual JHK band photometry quality
128-131 F4.1 mag DFUV ? GALEX FUV band excess magnitude
133-135 F3.1 mag e_DFUV ? The 1σ uncertainty in DFUV
137-140 F4.1 --- RFUV ? FUV excess to σ ratio
142-145 F4.1 mag DNUV ? GALEX NUV band excess magnitude
147-149 F3.1 mag e_DNUV ? The 1σ uncertainty in DNUV
151-154 F4.1 --- RNUV ? NUV excess to σ ratio
156-184 A29 --- OName Other identifier (1)
186-188 A3 --- Mmb [Yes No] Previously known member? (1)
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Note (1): If we know of an association between the GALEX source and a known
object, and if the literature confirms or rules out membership in
Taurus or Upper Scorpius, we list the information in the last two
columns. Our list of associations is not complete.
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Zone [Tau USco] Tau for Taurus, USco for Upper Sco
6- 21 A16 --- 2MASS 2MASS identification (HHMMSSss+DDMMSSs, J2000)
23- 43 A21 --- OName Previous Literature designation (1)
45- 46 A2 --- Mmb Membership (M=member, nM=non-member)
from previous Literature (1)
48- 52 F5.2 mag FUV ? GALEX FUV band AB magnitude
54- 58 F5.2 mag NUV ? GALEX NUV band AB magnitude
60- 64 F5.2 mag Jmag 2MASS J band Vega magnitude
66- 70 F5.2 mag Ksmag 2MASS Ks band Vega magnitude
72- 75 F4.1 mag DFUV ? GALEX FUV band excess magnitude
77- 80 F4.1 --- DFUVs ? GALEX FUV band excess magnitude in σ unit
82- 85 F4.1 mag DNUV ? GALEX NUV band excess magnitude
87- 90 F4.1 --- DNUVs ? GALEX NUV band excess magnitude in σ unit
92-107 A16 --- SpType MK spectral type
108-114 F7.3 0.1nm WCaIIk ? CaII-K equivalent width
115 A1 ---- n_WCaIIk [a] Note for no-measurement (2)
116-122 F7.3 0.1nm WCaIIh ? CaII-H equivalent width
123 A1 ---- n_WCaIIh [abc] Note for no-measurement (2)
124-130 F7.4 0.1nm WHb ? Hβ equivalent width
131 A1 ---- n_WHb [abd] Note for no-measurement (2)
132-138 F7.4 0.1nm WHa ? Hα equivalent width
139 A1 ---- n_WHa [ab] Note for no-measurement (2)
141 A1 --- l_WLi Limit flag on WLi
142-147 F6.4 0.1nm WLi ? Lithium equivalent width
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Note (1): If we know of an association between the GALEX source and a known
object, and if the literature confirms or rules out membership in Taurus or
Upper Scorpius, we list the information.
Note (2): Notes give reason why we could not measure emission equivalent width
as follows :
a = Core emission line in an absorption line
b = Self-absorbed profile
c = Inverse P Cygni profile
d = Core emission line in an absorption line and self-absorbed profile
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Byte-by-byte Description of file: table11.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Zone [Tau USco] Tau for Taurus, USco for Upper Sco
6- 21 A16 --- 2MASS 2MASS name
23- 34 A12 --- SpType MK spectral type
37- 45 A9 --- Ind Youth indicators
48- 52 F5.1 mas/yr pmRA Proper motion along RA
54- 58 F5.1 mas/yr pmDE Proper motion along DE
60- 62 F3.1 mas/yr e_pm rms uncertainty on proper motions
64- 66 A3 --- Mmb [Yes No] Proper-motion member?
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 21-May-2012