J/other/ARA+A/42.685 Young stars near the Sun (Zuckerman+, 2004)
Young stars near the Sun.
Zuckerman B., Song I.
<Annual Rev. Astron. Astrophys., 42, 685-721 (2004)>
=2004ARA&A..42..685Z 2004ARA&A..42..685Z
ADC_Keywords: Stars, nearby ; YSOs ; Associations, stellar
Abstract:
Until the late 1990s the rich Hyades and the sparse UMa clusters were
the only coeval, comoving concentrations of stars known within 60 pc
of Earth. Both are hundreds of millions of years old. Then beginning
in the late 1990s the TW Hydrae Association, the Tucana/Horologium
Association, the beta Pictoris Moving Group, and the AB Doradus Moving
Group were identified within ∼60pc of Earth, and the eta Chamaeleontis
cluster was found at 97pc. These young groups (ages 8-50Myr), along
with other nearby, young stars, will enable imaging and spectroscopic
studies of the origin and early evolution of planetary systems.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 77 24 *Proposed TWA members
table2.dat 72 34 Proposed beta Pic members
table3.dat 77 49 *Proposed Tucana/Horologium association members
table4.dat 72 18 *Proposed eta Cha members
table5.dat 77 36 Proposed AB Dor members
table6.dat 74 17 *Proposed members of the "Cha-Near" region
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Note on table1.dat: TWA 20 in Reid (2003MNRAS.342..837R 2003MNRAS.342..837R) is likely a
nonmember (Song et al. 2003ApJ...599..342S 2003ApJ...599..342S).
Note on table3.dat: HD 10144, 10269, 10472, & 20888 (not included in the
table) are members suggested by Zuckerman et al. (2001ApJ...559..388Z 2001ApJ...559..388Z)
whose membership status is uncertain. HIP 93815, 99803, 107649, and
PPM 366328 are previously proposed members that are likely nonmembers.
Note on table4.dat: Distance from Earth to the cluster is 97pc.
Note on table6.dat: Distance from Earth to the cluster is 90pc.
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Byte-by-byte Description of file: table?.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- TWA ? TWA number (in table1 only)
4- 18 A15 --- Name Star name (4)
20- 21 I2 h RAh Right ascension (J2000)
23- 24 I2 min RAm Right ascension (J2000)
26- 29 F4.1 s RAs Right ascension (J2000)
31 A1 --- DE- Declination sign (J2000)
32- 33 I2 deg DEd Declination (J2000)
35- 36 I2 arcmin DEm Declination (J2000)
38- 39 I2 arcsec DEs Declination (J2000)
41- 48 A8 --- SpType MK spectral type (1)
50- 53 F4.1 mag Vmag ? V magnitude
54 A1 --- n_Vmag [a] Note on Vmag (2)
56- 60 F5.1 pc Dist ? Heliocentric distance
61 A1 --- f_Dist [)] ) for distances derived photometrically
using Figure 2, otherwise from Hipparcos
62 A1 --- n_Dist [a] Note on Dist (2)
64 A1 --- M? [?] ? for questionable membership
66- 75 A10 --- Note Note on multiplicity or membership
77 A1 --- Rem [*+abcde] Individual notes (3)
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Note (1): Spectral types in brackets are based on V-K color. Reasons for
choosing V-K in preference to SIMBAD listed spectral types may be
found in the references of table5.
Note (2): Spectrum in Zuckerman et al. (2001ApJ...549L.233Z 2001ApJ...549L.233Z) and apparent
magnitudes in 2MASS (Cat. II/246/), DENIS (Cat. B/denis), and
Weinberger et al. (2004AJ....127.2246W 2004AJ....127.2246W) appear inconsistent.
Note (3): Notes as follows:
* = Based on their large photometric distance, TWA 15 and 17 are
probably members of the background LCC (Lower Cen-Cru)
+ = HIP 3556 may be a member (see Song et al. 2003ApJ...599..342S 2003ApJ...599..342S)
a = Large Hipparcos parallax error
b = With EW(Li)=320mÅ, GSC 8056-0482 is probably too young to be
a Tuc/Hor member (see Song et al. 2004ApJ...614L.125S 2004ApJ...614L.125S)
c = Questionable member (see Figures 3 and 4)
d = Listed distance is a weighted mean of HIP 12635 and 12638 distances
e = Listed distance is a weighted mean of HIP 14807 and 14809 distances
Note (4): References for all data:
* table1:
Kastner et al. (1997Sci...277...67K 1997Sci...277...67K);
Webb et al. (1999ApJ...512L..63W 1999ApJ...512L..63W);
Sterzik et al. (1999);
Webb (2000, PhS Thesis, Univ. Calif., Los Angeles);
Zuckerman et al. (2001ApJ...549L.233Z 2001ApJ...549L.233Z);
Song et al. (2002A&A...385..862S 2002A&A...385..862S, 2003ApJ...599..342S 2003ApJ...599..342S);
Torres et al. (2003AJ....125..825T 2003AJ....125..825T);
Neuhauser et al. (2003AN....324..535N 2003AN....324..535N);
Reid (2003MNRAS.342..837R 2003MNRAS.342..837R);
Weinberger et al. (2004AJ....127.2246W 2004AJ....127.2246W)
* table2:
Barrado y Navascues et al. (1999ApJ...520L.123B 1999ApJ...520L.123B);
Zuckerman et al. (2001ApJ...562L..87Z 2001ApJ...562L..87Z);
Song et al. (2002ApJ...581L..43S 2002ApJ...581L..43S, 2003ApJ...599..342S 2003ApJ...599..342S);
Ortega et al. (2002ApJ...575L..75O 2002ApJ...575L..75O, 2004ApJ...609..243O 2004ApJ...609..243O);
Neuhauser et al. (2003AN....324..535N 2003AN....324..535N);
Kaisler et al. (2004A&A...414..175K 2004A&A...414..175K)
* table3:
Zuckerman & Webb (2000ApJ...535..959Z 2000ApJ...535..959Z);
Torres et al. (2000AJ....120.1410T 2000AJ....120.1410T);
Song et al. (2003ApJ...599..342S 2003ApJ...599..342S);
Neuhauser et al. (2003AN....324..535N 2003AN....324..535N);
Chauvin et al. (2003A&A...404..157C 2003A&A...404..157C);
Mamajek et al. (2004ApJ...612..496M 2004ApJ...612..496M)
* table4:
Mamajek et al. (1999ApJ...516L..77M 1999ApJ...516L..77M);
Lawson et al. (2002MNRAS.329L..29L 2002MNRAS.329L..29L);
Kohler & Petr-Gotzens (2002AJ....124.2899K 2002AJ....124.2899K);
Lyo et al. (2003MNRAS.338..616L 2003MNRAS.338..616L);
Song et al. (2004ApJ...600.1016S 2004ApJ...600.1016S)
* table5:
Zuckerman et al. (2004ApJ...613L..65Z 2004ApJ...613L..65Z);
Song et al. (2003ApJ...599..342S 2003ApJ...599..342S)
* table6:
Alcala et al. (1995A&AS..114..109A 1995A&AS..114..109A);
Covino et al. (1997A&A...328..187C 1997A&A...328..187C);
Terranegra et al. (1999A&A...341L..79T 1999A&A...341L..79T);
Teixeira et al. (2000A&A...361.1143T 2000A&A...361.1143T);
Mamajek et al. (2000ApJ...544..356M 2000ApJ...544..356M);
Kohler (2001AJ....122.3325K 2001AJ....122.3325K);
Zuckerman et al. (2006ApJ...649L.115Z 2006ApJ...649L.115Z)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 07-Feb-2011