J/AJ/148/119 UCAC4 nearby star survey (Finch+, 2014)
UCAC4 nearby star survey: a search for our stellar neighbors.
Finch C.T., Zacharias N., Subasavage J.P., Henry T.J., Riedel A.R.
<Astron. J., 148, 119 (2014)>
=2014AJ....148..119F 2014AJ....148..119F
ADC_Keywords: Stars, nearby ; Stars, distances ; Proper motions ; Surveys ;
Photometry, UBV ; Photometry, infrared ; Photometry, ugriz
Keywords: astrometry - solar neighborhood - stars: distances -
stars: statistics - surveys - techniques: photometric
Abstract:
We use data from the U.S. Naval Observatory fourth CCD Astrograph
Catalog (UCAC4) in combination with photometry from the AAVSO
Photometric All-Sky Survey and Two Micron All-Sky Survey to identify
stars within 25pc of the Sun. A sample of nearby stars with accurate
trigonometric parallaxes from the Research Consortium On Nearby Stars
is used to generate a set of 16 new photometric color-MK relations
that provide distance estimates with uncertainties of 15%. This work
expands the available suites of well-calibrated photometric distance
relations that can be used to identify nearby stellar systems. The
distance relations are used with quality cuts to extract an initial
sample of stars from the UCAC4 estimated to be within 25pc. Color,
proper motion, and existing literature sources are then used to obtain
a clean sample of red dwarfs, while limiting the amount of
contamination from background giants, resulting in a sample of 1761
candidate nearby stars within 25pc. Of these, 339 are new discoveries
with no previously known published parallax or distance estimate,
primarily with proper motions less than 0.2arcsec/yr. Five stars are
estimated to be within 10pc, with the nearest, TYC 3980 1081 1, with
V=10.50 estimated to be at 5.9pc. That several hundred new stars have
been revealed so close to the Sun illustrates once again that there is
considerable work yet to be done to map the solar neighborhood and
that additional nearby stars are likely still to be discovered.
Description:
Our survey takes advantage of the newly released astrometric results
from the UCAC4 (cat. I/322) along with merged optical photometry from
the American Association of Variable Star Observers (AAVSO)
Photometric All Sky Survey (APASS, http://www.aavso.org/apass) and
infrared photometry from the Two Micron All-Sky Survey (2MASS, cat.
II/246). The UCAC4 catalog (U.S. Naval Observatory fourth CCD
Astrograph Catalog; cat. I/322), released in 2012 August, is the
fourth and final version of the UCAC project. Included as a supplement
for completeness to the photometry we provide ALLWISE photometry in
the 3.4, 4.6, 12, and 22µm mid-infrared bandpasses (W1, W2, W3, and
W4).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 190 339 Photometric distance estimates for new candidate
nearby star systems
table6.dat 190 1422 Photometric distance estimates for systems
recovered in the nearby star search
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See also:
II/328 : AllWISE Data Release (Cutri+ 2013)
I/322 : UCAC4 Catalogue (Zacharias+, 2012)
I/298 : LSPM-North Catalog (Lepine+ 2005)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
III/198 : Palomar/MSU nearby star spectroscopic survey (Hawley+ 1997)
J/ApJ/745/118 : UCAC3 proper motion survey. II. -47<DEC<0° (Finch+, 2012)
J/AJ/142/138 : All-sky catalog of bright M dwarfs (Lepine+, 2011)
J/AJ/142/92 : New proper motion stars with pm≥0.18''/yr (Boyd+, 2011)
J/AJ/142/10 : New proper motion stars 0.40''/yr>pm≥0.18''/yr (Boyd+, 2011)
J/AJ/140/844 : UCAC3 proper motion survey (Finch+, 2010)
J/A+A/509/A93 : Carbon-enhanced metal-poor stars (Masseron+, 2010)
J/AJ/133/2898 : New proper-motion stars (-90<DE≤47) (Finch+, 2007)
J/AJ/132/161 : NStars project: The southern sample. I. (Gray+, 2006)
J/MNRAS/369/751 : Near-infrared photometry of carbon stars (Whitelock+, 2006)
J/AJ/130/1871 : Spectroscopic survey of M dwarfs (Bochanski+, 2005)
J/AJ/130/1680 : LSPM-North proper-motion catalog nearby stars (Lepine+, 2005)
J/AJ/130/1658 : New high proper motion stars (-47<δ≤00)
(Subasavage+, 2005)
J/AJ/130/1247 : High proper motion stars in the DSS. III (Lepine+, 2005)
J/A+A/435/363 : Southern Infrared Proper Motion Survey (Deacon+, 2005)
J/AJ/128/463 : Preliminary 20pc census from the NLTT catalogue (Reid+, 2004)
J/A+A/403/943 : Mass-loss rates of galactic AGB stars (Le Bertre+, 2003)
J/AJ/126/3007 : Spectroscopy of faint red NLTT dwarfs (Reid+, 2003)
J/AJ/126/2048 : NStars project: the Northern Sample. I. (Gray+, 2003)
J/A+A/390/967 : Carbon-rich giants in the HR diagram (Bergeat+, 2002)
J/AJ/123/3409 : SDSS M, L, and T dwarfs (Hawley+, 2002)
J/A+A/376/997 : Galactic mass-losing AGB stars (Le Bertre+, 2001)
J/A+A/375/366 : Carbon stars from the Hamburg/ESO survey (Christlieb+ 2001)
J/A+A/275/163 : Luminous Carbon stars in Galactic Plane (Kastner+ 1993)
http://www.aavso.org/apass : APASS
Byte-by-byte Description of file: table[56].dat
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Bytes Format Units Label Explanations
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1- 25 A25 --- Name Object name
27- 37 F11.7 deg RAdeg Right ascension in decimal degrees (J2000) (1)
39- 49 F11.7 deg DEdeg Declination in decimal degrees (J2000) (1)
51- 57 F7.1 mas/yr pmRA Proper motion in RA (1)
59- 64 F6.1 mas/yr e_pmRA Error in pmRA (1)
66- 72 F7.1 mas/yr pmDE Proper motion in Dec (1)
74- 77 F4.1 mas/yr e_pmDE Error in pmDE (1)
79- 84 F6.3 mag Bmag [9/19] Johnson B magnitude (1)
86- 91 F6.3 mag Vmag [8/17] Johnson V magnitude (1)
93- 98 F6.3 mag gmag [9/13] SDSS g-band magnitude (1)
100-105 F6.3 mag rmag [8/16] SDSS r-band magnitude (1)
107-112 F6.3 mag imag [7/15] SDSS i-band magnitude (1)
114-119 F6.3 mag Jmag [5/12] 2MASS J magnitude (1)
121-126 F6.3 mag Hmag [4/13] 2MASS H magnitude (1)
128-133 F6.3 mag Kmag [4/11] 2MASS Ks magnitude (1)
135-140 F6.3 mag W1mag [4/14]? WISE/W1 (3.4µm) magnitude
142-147 F6.3 mag W2mag [3/14]? WISE/W2 (4.6µm) magnitude
149-154 F6.3 mag W3mag [3/13]? WISE/W3 (12µm) magnitude
156-161 F6.3 mag W4mag [1/10]? WISE/W4 (22µm) magnitude
163-167 F5.2 pc D1 [2/25] Photometric distance estimate
169-172 F4.2 pc e_D1 [0.4/9.4] Error in D1
174-175 I2 --- Nr [7/16] Number of color relations used for the
estimates (typically all 16)
177-182 F6.2 pc D2 [1.8/142]? Published distance
184 A1 --- n_D2 [TP] Published distance type (T=trigonometric
parallax, P=photometric distance estimate)
186-190 A5 --- Note Additional note(s) (2)
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Note (1): Come directly from the UCAC4 catalog (cat. I/322) with some
APASS photometry updated to the recent DR7 release for those stars
with missing photometry (current release data can be found at
http://www.aavso.org/apass). If no photometry was found or the photometry
between 2MASS and APASS was not in agreement in the UCAC4 then the APASS
and 2MASS (cat. II/246) databases were searched manually using either
VizieR (http://vizier.u-strasbg.fr/viz-bin/VizieR) or the APASS
websites to check for consistency and to fill in gaps.
Note (2): Note defined as follows:
a = candidate selected from box1 using Figure3 (Vmag-Kmag vs. Jmag-Kmag
color-color plots) in the paper. Box1 contains the most likely M dwarf
candidates;
b = candidate selected from box2, using Figure 3. Box2 is more likely to
be contaminated by giants than box 1;
c = candidate within 30'' of an X-ray source;
d = candidate's motion could not be verified by eye;
e = candidate is a known giant;
f = distance estimate from this survey differs by more than 2σ from
published parallax or distance estimate.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 11-Dec-2014