J/ApJ/817/112 NEOWISE/AllWISE high proper motion objects (Schneider+, 2016)
A proper motion survey using the first sky pass of NEOWISE-reactivation data.
Schneider A.C., Greco J., Cushing M.C., Kirkpatrick J.D., Mainzer A.,
Gelino C.R., Fajardo-Acosta S.B., Bauer J.
<Astrophys. J., 817, 112 (2016)>
=2016ApJ...817..112S 2016ApJ...817..112S (SIMBAD/NED BibCode)
ADC_Keywords: Photometry, infrared ; Spectral types ; Stars, late-type ;
Proper motions
Keywords: brown dwarfs; stars: low-mass
Abstract:
The Wide-field Infrared Survey Explorer (WISE) was reactivated in 2013
December (NEOWISE) to search for potentially hazardous near-Earth
objects. We have conducted a survey using the first sky pass of
NEOWISE data and the AllWISE catalog to identify nearby stars and
brown dwarfs with large proper motions (µtotal≳250mas/yr). A
total of 20548 high proper motion objects were identified, 1006 of
which are new discoveries. This survey has uncovered a significantly
larger sample of fainter objects (W2≳13mag) than the previous WISE
motion surveys of Luhman (2014, J/ApJ/781/4) and Kirkpatrick et al.
(2014, J/ApJ/783/122). Many of these objects are predicted to be new L
and T dwarfs based on near- and mid-infrared colors. Using estimated
spectral types along with distance estimates, we have identified
several objects that likely belong to the nearby solar neighborhood
(d<25pc). We have followed up 19 of these new discoveries with
near-infrared or optical spectroscopy, focusing on potentially nearby
objects, objects with the latest predicted spectral types, and
potential late-type subdwarfs. This subset includes six M dwarfs, five
of which are likely subdwarfs, as well as eight L dwarfs and five T
dwarfs, many of which have blue near-infrared colors. As an additional
supplement, we provide 2MASS and AllWISE positions and photometry for
every object found in our search, as well as 2MASS/AllWISE calculated
proper motions.
Description:
The NEOWISE reactivation mission was carried out using the W1 (3.4um)
and W2 (4.6um) passbands of the WISE telescope.
Considering the ∼4 year time baseline between the first sky pass of
NEOWISE and the first WISE epochs, our 1" search radius gives us a
nominal minimum proper motion limit of ∼250mas/yr (see section 2).
Low-resolution (R=75-120) spectra were acquired for several sources
with the upgraded SpeX spectrograph at the 3m NASA Infrared Telescope
Facility (IRTF) on Mauna Kea. A summary of all IRTF/SpeX observations
is given in Table 11.
Three targets were observed with the Double Spectrograph on the Hale
5m telescope on the night of UT 2015 September 07.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 144 1001 New high proper motion objects
table2.dat 138 19489 Known high proper motion objects
table11.dat 86 19 IRTF/SpeX and Palomar/Double Spectrograph
observations
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See also:
III/272 : RAVE 4th data release (Kordopatis+, 2013)
J/ApJS/220/18 : BDKP IV. RVs of late-M & L dwarfs (Burgasser+, 2015)
J/AJ/147/34 : SpeX library of L-type dwarfs (Schneider+, 2014)
J/ApJ/783/122 : AllWISE motion survey (Kirkpatrick+, 2014)
J/ApJ/781/4 : Photometry of high PM objects from WISE (Luhman, 2014)
J/ApJS/201/19 : Hawaii Infrared Parallax Program. I. (Dupuy+, 2012)
J/ApJ/753/156 : T/Y brown dwarfs with WISE photometry (Kirkpatrick+, 2012)
J/ApJ/752/56 : BDKP. III. Parallaxes for ultracool dwarfs (Faherty+, 2012)
J/ApJS/197/19 : First brown dwarfs discovered by WISE (Kirkpatrick+, 2011)
J/AJ/142/92 : New proper motion stars with pm≥0.18"/yr (Boyd+, 2011)
J/AJ/142/77 : New T dwarfs identified in Pan-STARRS 1 (Deacon+, 2011)
J/ApJS/190/100 : NIR proper motion survey using 2MASS (Kirkpatrick+, 2010)
J/PASP/122/885 : Gliese star/2MASS cross identifications (Stauffer+, 2010)
J/AJ/139/1808 : Colors and kinematics of SDSS L dwarfs (Schmidt+, 2010)
J/MNRAS/394/857 : UKIDSS-2MASS proper motion survey (Deacon+, 2009)
J/AJ/137/1 : PMs and astrometry of late-type dwarfs (Faherty+, 2009)
J/ApJ/676/1281 : L and T dwarfs in 2MASS/SDSS (Metchev+, 2008)
J/AJ/134/1162 : 11 new T dwarfs in 2MASS (Looper+, 2007)
J/A+A/468/163 : Sample of low mass stars with mu>0.1"/yr (Deacon+, 2007)
J/ApJ/637/1067 : NIR spectral classification of T dwarfs (Burgasser+, 2006)
J/ApJS/161/444 : [Fe/H] & Teff for luminosity class IV-V stars (Taylor+, 2005)
J/A+A/421/763 : Liverpool-Edinburgh High PM Catalogue (Pokorny+, 2004)
J/AJ/127/2856 : Brown dwarfs in the 2MASS Survey (Burgasser+, 2004)
J/ApJ/476/311 : 2MASS M-dwarf discoveries (Kirkpatrick+ 1997)
Byte-by-byte Description of file: table[12].dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- WISEA AllWISE designation (Cat. II/328;
JHHMMSS.ss+DDMMSS.s)
21 A1 --- Flag Object Flag (1)
23 A1 --- l_W1mag Limit flag on W1mag
24- 29 F6.3 mag W1mag [-0.05/17.3]? ALLWISE W1 (3.35um) magnitude
31- 35 F5.3 mag e_W1mag [0.01/0.6]? Uncertainty in W1mag
37 A1 --- l_W2mag Limit flag on W2mag
38- 43 F6.3 mag W2mag [0.2/15] ALLWISE W2 (4.6um) magnitude
45- 49 F5.3 mag e_W2mag [0.007/0.6]? Uncertainty in W1mag
51- 66 A16 --- 2MASS 2MASS designation (Cat. II/246;
HHMMSSss+DDMMSSs, J2000)
68 A1 --- l_Jmag Limit flag on Jmag
69- 74 F6.3 mag Jmag [2.2/17.7] 2MASS J magnitude
76- 80 F5.3 mag e_Jmag [0.01/]? Uncertainty in Jmag
82 A1 --- l_Hmag Limit flag on Hmag
83- 88 F6.3 mag Hmag [2/17]? 2MASS H magnitude
90- 94 F5.3 mag e_Hmag [0.01/]? Uncertainty in Hmag
96 A1 --- l_Kmag Limit flag on Kmag
97-102 F6.3 mag Kmag [2/17.4]? 2MASS Ks magnitude
104-110 F7.3 mag e_Kmag [0.01/]? Uncertainty in Kmag
112-118 F7.1 mas/yr pmRA [-4441/6798] Proper motion in right ascension
120-125 F6.1 mas/yr e_pmRA [5/76] Uncertainty in pmRA
127-133 F7.1 mas/yr pmDE [-5824/10287] Proper motion in declination
135-138 F4.1 mas/yr e_pmDE [5/59] Uncertainty in pmDE
140 A1 --- l_SpT Limit flag on SpT
141-144 F4.1 --- SpT [5/26.2]? Numerical spectral type estimates
(e.g., 5=M5, 15=L5, 25=T5); only for table 1
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Note (1): Notes on object photometry as follows:
a = 2MASS photometry for this object is from the 2MASS Reject Catalog.
b = WISE photometry and positions for this object are from the
AllWISE Reject Catalog.
c = WISE photometry and positions for this object are from the
WISE All-Sky Catalog.
d = This object is a co-moving double that is resolved in 2MASS, but not
in AllWISE.
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Byte-by-byte Description of file: table11.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Inst Instrument (Pal/DSpec=Palomar/DoubleSpec)
11- 29 A19 --- WISEA Designation (JHHMMSS.ss+DDMMSS.s)
31- 43 A13 --- SpT MK spectral type
45- 48 F4.1 --- Type [5.3/18.9] Photometric type from table 1
50- 52 I3 pc D.min Lower range of distance
53 A1 --- --- [-]
54- 56 I3 pc D.max [26/151] Upper range of distance
58- 60 I3 km/s V.min Lower range of tangential velocity
61 A1 --- --- [-]
62- 64 I3 km/s V.max [38/252] Upper range of tangential velocity
66- 76 A11 --- Date UT date of the observation
78- 81 I4 s Exp Exposure time (blue side for DoubleSpec)
82 A1 --- --- [,]
83- 86 I4 s Exp2 ? Exposure time for the red side of the
DoubleSpec spectrograph
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 18-Apr-2016