J/MNRAS/454/4054 High proper motion sources from WISE (Beamin+, 2015)
Spectrophotometric characterization of high proper motion sources from WISE.
Beamin J.C., Ivanov V.D., Minniti D., Smart R.L., Muzic K., Mendez R.A.,
Beletsky Y., Bayo A., Gromadzki M., Kurtev R.
<Mon. Not. R. Astron. Soc., 454, 4054-4065 (2015)>
=2015MNRAS.454.4054B 2015MNRAS.454.4054B (SIMBAD/NED BibCode)
ADC_Keywords: Stars, faint ; Proper motions ; Photometry
Keywords: techniques: spectroscopic - astrometry - parallaxes - brown dwarfs -
stars: low-mass
Abstract:
The census of the solar neighbourhood is almost complete for stars and
becoming more complete in the brown dwarf regime. Spectroscopic,
photometric and kinematic characterization of nearby objects helps us
to understand the local mass function, the binary fraction, and
provides new targets for sensitive planet searches. We aim to derive
spectral types and spectrophotometric distances of a sample of new
high proper motion sources found with the WISE (Wide-field Infrared
Survey Explorer) satellite, and obtain parallaxes for those objects
that fall within the area observed by the Vista Variables in the Via
Lactea survey (VVV). We used low-resolution spectroscopy and template
fitting to derive spectral types, multiwavelength photometry to
characterize the companion candidates and obtain photometric
distances. Multi-epoch imaging from the VVV survey was used to measure
the parallaxes and proper motions for three sources. We confirm a new
T2 brown dwarf within ∼15pc. We derived optical spectral types for 24
sources, mostly M dwarfs within 50pc. We addressed the wide binary
nature of 16 objects found by the WISE mission and previously known
high proper motion sources. Six of these are probably members of wide
binaries, two of those are new, and present evidence against the
physical binary nature of two candidate binary stars found in the
literature, and eight that we selected as possible binary systems. We
discuss a likely microlensing event produced by a nearby low-mass star
and a galaxy, that is to occur in the following five years.
Description:
The ESO Faint Object Spectrograph and Camera v.2 (EFOSC2) mounted at
the 3.6-m New Technology Telescope (NTT) at la Silla observatory, is a
versatile instrument for low-resolution spectroscopy, imaging and
polarimetry. We obtained low-resolution long-slit spectra for 24
sources (see Table 1) using the same configuration for all the
sources: 1 arcsec slit width, grism number one, covering a spectral
range of λ=3185-10940Å with a resolution ∼48Å. All the
sources were observed on 2014 April 17.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 55 25 Sample of WISE high PM objects selected for
spectroscopic follow-up with the EFOSC2 at the
NTT at La Silla observatory, and FIRE at Baade
at Las Campanas observatory
table3.dat 374 38 Archival photometry for sources selected for
EFOSC2 spectroscopy and candidate companions
table4.dat 108 25 Spectral classification and spectrophotometric
distances for the stars observed with EFOSC2@NTT
table5.dat 122 14 Binary/multiple system investigated in this paper
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See also:
B/denis : The DENIS database (DENIS Consortium, 2005)
I/284 : The USNO-B1.0 Catalog (Monet+ 2003)
I/305 : The Guide Star Catalog, Version 2.3.2 (GSC2.3) (STScI, 2006)
I/322 : UCAC4 Catalogue (Zacharias+, 2012)
I/327 : Carlsberg Meridian Catalog 15 (CMC15) (CMC, 2011)
II/337 : VISTA Variables in the Via Lactea Survey DR1 (Minniti+, 2014)
II/311 : WISE All-Sky Data Release (Cutri+ 2012)
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 24 A24 --- Name Name (2MASS or WISE)
26- 27 I2 h RAh Right ascension (J2000)
29- 30 I2 min RAm Right ascension (J2000)
32- 36 F5.2 s RAs Right ascension (J2000)
38 A1 --- DE- Declination sign (J2000)
39- 40 I2 deg DEd Declination (J2000)
42- 43 I2 arcmin DEm Declination (J2000)
45- 48 F4.1 arcsec DEs Declination (J2000)
50- 55 A6 --- ExpTime Exposure time (in seconds)
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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- 23 A23 --- Name Name from 2MASS point source catalogue
25- 27 A3 --- Spectra [yes/no ] Spectroscopy available for this object?
29- 34 F6.3 mag Bmag ?=- B magnitude from GSC2.3 or USNO-B1
36- 41 F6.3 mag Vmag ?=- V magnitude from GSC2.3 or USNO-B1
43- 48 F6.3 mag Rmag ?=- R magnitude from GSC2.3 or USNO-B1
49- 53 F5.2 mag Imag ?=- I magnitude from Super Cosmos IIVN
55- 60 F6.3 mag Rmag2 ?=- Old R magnitude from UCAC4
62- 67 F6.3 mag J2mag ?=- 2MASS J magnitude
69- 73 F5.3 mag e_J2mag ?=- Error in J2mag
75- 80 F6.3 mag H2mag ?=- 2MASS H magnitude
82- 86 F5.3 mag e_H2mag ?=- Error in H2mag
88- 93 F6.3 mag Ks2mag ?=- 2MASS KS magnitude
95- 99 F5.3 mag e_Ks2mag ?=- Error in KS2mag
101-106 F6.3 mag W1mag ?=- WISE W1 magnitude
108-112 F5.3 mag e_W1mag ?=- Error in W1mag
114-119 F6.3 mag W2mag ?=- WISE W2 magnitude
121-125 F5.3 mag e_W2mag ?=- Error in W2mag
127-132 F6.3 mag W3mag ?=- WISE W3 magnitude
134-138 F5.3 mag e_W3mag ?=- Error in W3mag
140-144 F5.3 mag W4mag ?=- WISE W4 magnitude
146-150 F5.3 mag e_W4mag ?=- Error in W4mag
152-157 F6.3 mag IDmag ?=- DENIS I magnitude
159-162 F4.2 mag e_IDmag ?=- Error in IDmag
164-169 F6.3 mag JDmag ?=- DENIS I magnitude
171-174 F4.2 mag e_JDmag ?=- Error in JDmag
176-181 F6.3 mag KsDmag ?=- DENIS I magnitude
183-186 F4.2 mag e_KsDmag ?=- Error in KSDmag
188-193 F6.3 mag umag ?=- SDSS DR9 u magnitude
195-199 F5.3 mag e_umag ?=- Error in umag
201-206 F6.3 mag gmag ?=- SDSS DR9 g magnitude
208-212 F5.3 mag e_gmag ?=- Error in gmag
214-219 F6.3 mag rmag ?=- SDSS DR9 r or new UCAC4 r or CMC15 r
magnitude (1)
221-225 F5.3 mag e_rmag ?=- Error in rmag
227-232 F6.3 mag imag ?=- SDSS DR9 i or new UCAC4 i magnitude (1)
234-238 F5.3 mag e_imag ?=- Error in imag
240-245 F6.3 mag zmag ?=- SDSS DR9 z magnitude
247-251 F5.3 mag e_zmag ?=- Error in zmag
253-258 F6.3 mag YUmag ?=- UKIDSS Y magnitude
260-264 F5.3 mag e_YUmag ?=- Error in YUmag
266-271 F6.3 mag JUmag ?=- UKIDSS J magnitude
273-277 F5.3 mag e_JUmag ?=- Error in JUmag
279-284 F6.3 mag HUmag ?=- UKIDSS H magnitude
286-290 F5.3 mag e_HUmag ?=- Error in HUmag
292-297 F6.3 mag KUmag ?=- UKIDSS K magnitude
300-304 F5.3 mag e_KUmag ?=- Error in KUmag
306-312 F7.4 mag ZVmag ?=- VVV DR3 Z magnitude
314-319 F6.4 mag e_ZVmag ?=- Error in ZVmag
321-327 F7.4 mag YVmag ?=- VVV DR3 Y magnitude
329-334 F6.4 mag e_YVmag ?=- Error in YVmag
335-341 F7.4 mag JVmag ?=- VVV DR3 J magnitude
342-347 F6.4 mag e_JVmag ?=- Error in JVmag
348-354 F7.4 mag HVmag ?=- VVV DR3 H magnitude
355-360 F6.4 mag e_HVmag ?=- Error in HVmag
361-367 F7.4 mag KsVmag ?=- VVV DR3 Ks magnitude
369-374 F6.4 mag e_KsVmag ?=- Error in KsVmag
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Note (1): for magnitudes from UCAC4 transformed to SDSS r and i filters,
we assume a fixed error of 0.3 mag.
for magnitudes from CMC15, the catalogue mentions they use an SDSS r filter,
we assumed 0.1 errors (see discussion of errors in the text).
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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- 23 A23 --- Name Name from 2MASS point source catalogue
25- 34 A10 --- SpType MK spectral type
38- 41 I4 K Teff SED effective temperature
43- 48 F6.3 mag Jmag 2MASS J magnitude
50- 55 F6.1 mas/yr pmRA Proper motion along RA, pmRA*cosDE
57- 59 F3.1 mas/yr e_pmRA ? rms uncertainty on pmRA
61- 66 F6.1 mas/yr pmDE Proper motion along DE
68- 70 F3.1 mas/yr e_pmDE ? rms uncertainty on pmDE
73- 77 F5.1 pc Dist1 ?=- First distance from litterature
78 A1 --- n_Dist1 [cbd] Note for Dist (1)
80- 81 I2 pc Dist2 ? Seconde distance from litterature
82 A1 --- n_Dist2 [b] Note for Dist2 (1)
84- 85 I2 pc Dist3 ? Third distance from litterature
86 A1 --- n_Dist3 [b] Note for Dist3 (1)
88- 92 F5.1 pc Dist Distance from this work (2)
94- 96 F3.1 pc E_Dist ? Error on Dist (upper value)
98-100 F3.1 pc e_Dist ? Error on Dist (lower value)
102-107 A6 --- Ref Reference for proper motion and litterature
distance (3)
108 A1 --- Note [a] Note (4)
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Note (1): Notes as follows:
b = Photometric distance (spectral type derived from Teff using the relations
in Pecaut & Mamajek (2013, Cat. J/ApJS/208/9) and online table maintained
by E. Mamajek,
http://www.pas.rochester.edu/~emamajek/EEM_dwarf_UBVIJHK_colors_Teff.txt)
c = Parallax distance
d = The paper cites the value for other object of the system (SIPS 1910-4133A)
and is from photographic plates, our measurement is for SIPS 1910-4133B.
Note (2): The photometric distance error from this work are ~<20 per cent.
Note (3): The values of PM and distances with quoted errors were fitted from
VVV data references as follows:
1 = Luhman (2014, Cat. J/ApJ/781/4)
2 = Winters et al. (2015, Cat. J/AJ/149/5)
3 = Salim & Gould (2003, Cat. J/ApJ/582/1011)
4 = Finch et al. (2007, Cat. J/AJ/133/2898)
5 = Luyten & Hughes (1980, Proper Motion Survey with the Forty-Eight Inch
Schmidt Telescope 1980 MN, USA Univ. Minnesota)
6 = Subasavage et al. (2005, Cat. J/AJ/129/413)
7 = Lepine & Shara (2005AJ....129.1483L 2005AJ....129.1483L, Cat. I/298)
8 = Ammons et al. (2006ApJ...638.1004A 2006ApJ...638.1004A, Cat. V/136)
9 = Fresneau, Vaughan & Argyle (2007, Cat. J/A+A/469/1221)
10 = Pickles & Depagne (2010PASP..122.1437P 2010PASP..122.1437P, Cat. VI/135)
TW = this work
Note (4): a = We recalculated the PM using 2MASS and the WISE ALL-SKY epoch
position with the highest S/N, as we find that the Salim & Gould (2003,
Cat. J/ApJ/582/1011) value for PM of LP 721-15 is inconsistent with the motion
of the sources in the images, this object could be an unresolved binary, and
then located furher away, see text for discussion.
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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- 23 A23 --- Name Star 2MASS ID
25- 28 A4 --- SpType Spectral type from this work and from
literature spectra
30 I1 --- r_SpType ? Reference for SpType (1)
33- 36 I4 K Teff ? Effective temperature based on photometric
spectral energy distribution
38 I1 --- r_Teff ? Reference for Teff (1)
41- 46 F6.3 mag J2mag ? 2MASS J magnitude
48- 53 F6.2 arcsec rho ? Angular separation
54- 58 A5 --- n_rho Note on rho
59 A1 --- l_Dist [~] Limit flag on Dist
60- 65 F6.2 pc Dist ? Photometric distance, except for the
labelled objects which have parallaxes
67- 69 F3.1 pc E_Dist ? Error on Dist (upper value)
71- 73 F3.1 pc e_Dist ? Error on Dist (lower value)
75 I1 --- r_Dist ? Reference for Dist (1)
77- 83 F7.2 mas/yr pmRA ? Proper motion along Ra (pmRA*cosDE)
85- 87 F3.1 mas/yr e_pmRA ? rms uncertainty on pmRA
89 I1 --- r_pmRA ? Reference for pmRA (1)
92- 97 F6.1 mas/yr pmDE ? Proper motion along DE
99-101 F3.1 mas/yr e_pmDE ? rms uncertainty on pmDE
103 I1 --- r_pmDE ? Reference for pmDE
106-122 A17 --- Rem Remarks (2)
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Note (1): References as follows:
1 = Hawley, Gizis & Reid (1996AJ....112.2799H 1996AJ....112.2799H, Cat. III/198)
2 = van Altena, Lee & Hoffleit (1995, Cat. I/238)
3 = Luhman (2014, Cat. J/ApJ/781/4)
4 = Kirkpatrick et al. (2014ApJ...783..122K 2014ApJ...783..122K)
5 = Deacon et al. (2005, Cat. J/A+A/435/363)
6 = Winters et al. (2015, Cat. J/AJ/149/5)
7 = Houdebine (2010, Cat. J/MNRAS/407/1657)
The values without reference were calculated or derived in this work, the
photometric distances have a ≲20 per cent error (spectral type and effective
temperature uncertainties are the main source of error).
Note (2): (1) = from Hawley, Gizis & Reid (1996AJ....112.2799H 1996AJ....112.2799H, Cat. III/198)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 22-Jul-2016