J/ApJ/868/43 Adaptative optic images of WISE YSO candidates (Silverberg+, 2018)
Follow-up imaging of disk candidates from the Disk Detective citizen science
project: new discoveries and false positives in WISE circumstellar disk surveys.
Silverberg S.M., Kuchner M.J., Wisniewski J.P., Bans A.S., Debes J.H.,
Kenyon S.J., Baranec C., Riddle R., Law N., Teske J.K., Burns-Kaurin E.,
Bosch M.K.D., Cernohous T., Doll K., Durantini Luca H.A., Hyogo M.,
Hamilton J., Finnemann J.J.S., Lau L. (The Disk Detective Collaboration)
<Astrophys. J., 868, 43 (2018)>
=2018ApJ...868...43S 2018ApJ...868...43S
ADC_Keywords: YSOs; Photometry, infrared; Optical; Effective temperatures;
Stars, distances
Keywords: catalogs ; infrared: planetary systems ; methods: data analysis ;
protoplanetary disks ; surveys
Abstract:
The Disk Detective citizen science project aims to find new stars with
excess 22µm emission from circumstellar dust in the AllWISE data
release from the Wide-field Infrared Survey Explorer. We evaluated 261
Disk Detective objects of interest with imaging with the Robo-AO
adaptive optics instrument on the 1.5m telescope at Palomar
Observatory and with RetroCam on the 2.5m du Pont Telescope at Las
Campanas Observatory to search for background objects at 0.15"-12"
separations from each target. Our analysis of these data leads us to
reject 7% of targets. Combining this result with statistics from our
online image classification efforts implies that at most 7.9%±0.2%
of AllWISE-selected infrared excesses are good disk candidates.
Applying our false-positive rates to other surveys, we find that the
infrared excess searches of McDonald+ (2012, J/MNRAS/427/343 and 2017,
J/MNRAS/471/770) and Marton+ (2016, J/MNRAS/458/3479) all have
false-positive rates >70%. Moreover, we find that all 13 disk
candidates in Theissen & West (2014, J/ApJ/794/146) with W4
signal-to-noise ratio >3 are false positives. We present 244 disk
candidates that have survived vetting by follow-up imaging. Of these,
213 are newly identified disk systems. Twelve of these are candidate
members of comoving pairs based on Gaia astrometry, supporting the
hypothesis that warm dust is associated with binary systems. We also
note the discovery of 22µm excess around two known members of the
Scorpius-Centaurus association, and we identify known disk host
WISEAJ164540.79-310226.6 as a likely Sco-Cen member. Thirty of these
disk candidates are closer than ∼125pc (including 26 debris disks),
making them good targets for both direct-imaging exoplanet searches.
Description:
We have performed follow-up imaging of a subset of our Disk Detective
Object of Interest (DDOIs) using the Robo-AO on the 1.5m telescope at
Mount Palomar and the RetroCam instrument on the Irenee R. du Pont
Telescope at Las Campanas Observatory.
We observed 230 targets in the Sloan-i filter with adaptive optics
using Robo-AO between 2014 June 14 and and 2015 March 09.
We also collected high-resolution images of 166 targets (including 15
observed with Robo-AO) in the Yc (λc=1.035um) and Hc
(λc=1.621um) filters using RetroCam on the 100 inch (2.54m)
Irenee R. du Pont Telescope at Las Campanas Observatory in 2015 Jun 30,
Jul 01-02 and Oct 26-27-28.
Overall, 244 targets retain a significant infrared excess after the
contribution of background objects has been removed.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table4.dat 122 244 Disk candidates
table5.dat 76 111 Derived parameters of debris disk candidates
table6.dat 114 133 Derived parameters of YSO disk candidates
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See also:
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
II/332 : c2d Spitzer final data release (DR4) (Evans+, 2003)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
J/ApJS/101/117 : UBVRIJHKLMNQ photometry in Taurus-Auriga (Kenyon+ 1995)
J/MNRAS/313/43 : OB association members in ACT+TRC Cat. (Hoogerwerf, 2000)
J/AJ/119/3026 : Circumstellar disk candidates in Orion (Rebull+, 2000)
J/A+AS/144/469 : Delta Scuti stars (Rodriguez+, 2000)
J/AJ/126/2971 : UBVRI photometry of 131 Herbig Ae/Be (Vieira+, 2003)
J/MNRAS/363/1111 : Tycho-2 stars with IR excess (Clarke+, 2005)
J/AJ/129/856 : Herbig Ae/Be stars in nearby OB assoc. (Hernandez+, 2005)
J/ApJ/688/1142 : Star formation in W5: Spitzer observations (Koenig+, 2008)
J/ApJ/688/362 : Disks around BDs in σ Ori cluster (Luhman+, 2008)
J/ApJS/180/117 : MK classifications of spectroscopic binaries (Abt, 2009)
J/ApJS/181/321 : Properties of Spitzer c2d dark clouds (Evans+, 2009)
J/MNRAS/415/103 : IPHAS T Tauri candidates in IC 1396 (Barentsen+, 2011)
J/AJ/141/45 : Speckle observations of HIP stars (Horch+, 2011)
J/ApJ/733/L2 : YSOs from WISE in Western Circinus cloud (Liu+, 2011)
J/ApJS/196/4 : New young star candidates in Taurus-Auriga (Rebull+, 2011)
J/ApJ/756/133 : ScoCen debris disks around B- and A-type stars (Chen+, 2012)
J/MNRAS/426/91 : Kepler stars with infrared excess (Kennedy+, 2012)
J/MNRAS/427/343 : Infrared excesses of Hipparcos stars (McDonald+, 2012)
J/AJ/144/192 : Spitzer survey of Orion A & B. I. YSOs (Megeath+, 2012)
J/ApJ/752/58 : α Per cluster members (Zuckerman+, 2012)
J/ApJS/208/9 : Intrinsic colors & temperatures of PMS stars (Pecaut+, 2013)
J/ApJS/208/29 : HIP stars with 22µm excess (Wu+, 2013)
J/ApJS/211/25 : Spitzer/IRS debris disk catalog. I. (Chen+, 2014)
J/MNRAS/437/391 : IR excess in Sun-like stars with WISE (Cruz-Saenz+, 2014)
J/ApJ/784/126 : IR photometry of all known members in Taurus (Esplin+, 2014)
J/ApJS/212/10 : WISE IR excesses for stars within 75pc (Patel+, 2014)
J/ApJ/794/124 : NGC 2264 Spitzer sources (Rapson+, 2014)
J/A+A/572/A89 : YSO candidates toward Orion (Sanchez+, 2014)
J/ApJ/794/146 : M dwarfs with IR excess (Theissen+, 2014)
J/AJ/150/100 : WISE YSO cand. near σ and λ Ori (Koenig+, 2015)
J/ApJ/805/77 : Spitzer 3.6 and 4.5um monitoring of 5 stars (Meng+, 2015)
J/other/NewA/44.1 : IR photometric study of Herbig Ae/Be stars (Chen+, 2016)
J/ApJS/225/15 : IR excess stars from Tycho-2 and AllWISE (Cotten+, 2016)
J/MNRAS/458/3479 : SVM selection of WISE YSO Candidates (Marton+, 2016)
J/MNRAS/471/770 : Param. & IR excesses of Gaia DR1 stars (McDonald+, 2017)
J/AJ/153/257 : Comoving stars in Gaia DR1 (Oh+, 2017)
J/AJ/153/165 : Collisions of terrestrial worlds (Theissen+, 2017)
J/ApJ/856/23 : BANYAN. XI. The BANYAN Σ algorithm (Gagne+, 2018)
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Zoo Zooniverse identifier
12- 17 I6 --- HD ? HD number
19- 37 A19 --- WISEA WISE identifier (JHHMMSS.ss+DDMMSS.s)
39- 48 A10 --- SpT Spectral type (1)
50- 57 F8.2 pc Dist [63/11564]? Distance (2)
59- 65 F7.2 pc e_Dist [0.1/3467]? Uncertainty in Dist
67- 72 F6.3 mag Vmag [6.3/16.1]? Apparent Simbad V band magnitude
74- 78 F5.3 mag e_Vmag [0.009/0.9]? Uncertainty in Vmag
80- 85 F6.3 mag Jmag [6.1/15.2] Apparent J band magnitude
87- 91 F5.3 mag e_Jmag [0.01/0.07] Uncertainty in Jmag
93- 98 F6.3 mag W1mag [6/13.6] WISE 3.4 micron band apparent magnitude
100-104 F5.3 mag e_W1mag [0.02/0.06] Uncertainty in W1mag
106-110 F5.3 mag W4mag [0.6/7.8] WISE 22 micron band apparent magnitude
112-116 F5.3 mag e_W4mag [0.01/0.2] Uncertainty in W4mag
118-122 A5 --- Note Additional notes (3)
--------------------------------------------------------------------------------
Note (1): Spectral types are from SIMBAD, with the exception of sources that
appear in Paper I (Kuchner+ 2016ApJ...830...84K 2016ApJ...830...84K); see Note "a".
For those sources, we use the spectral types published in that paper.
Note (2): Distances are based on parallax measurements from Hipparcos or TGAS,
as listed on SIMBAD.
Note (3): Note as follows:
a = Appears in Paper I (Kuchner+ 2016ApJ...830...84K 2016ApJ...830...84K).
b = Listed as a comoving object in Oh et al. (2017, J/AJ/153/257);
c = Listed in the K2 Ecliptic Plane Input Catalog;
d = Listed in Chen et al. (2016, J/other/NewA/44.1);
e = Identified in Vieira et al. (2003, J/AJ/126/2971);
f = Identified in Corbally & Straizys (2009BaltA..18....1C 2009BaltA..18....1C)
g = Identified in Cotten & Song (2016, J/ApJS/225/15);
h = Identified in Esplin et al. (2014, J/ApJ/784/126);
i = Identified in Rebull et al. (2011, J/ApJS/196/4);
j = Identified in Wu et al. (2013, J/ApJS/208/29);
k = Identified in Guieu et al. (2010ApJ...720...46G 2010ApJ...720...46G);
l = Identified in Koenig et al. (2015, J/AJ/150/100);
m = Identified in Hernandez et al. (2005, J/AJ/129/856);
n = Identified in Alcala et al. (1996AAS...119....7A 1996AAS...119....7A);
o = Identified in Rojas et al. (2008MNRAS.387.1335R 2008MNRAS.387.1335R);
p = Identified in Sanchez et al. (2014, J/A+A/572/A89);
q = Identified in Rebull et al. (2000, J/AJ/119/3026);
r = Identified in Megeath et al. (2012, J/AJ/144/192).
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Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Zoo Zooniverse identifier
12- 30 A19 --- WISEA WISE identifier (JHHMMSS.ss+DDMMSS.s)
32- 36 I5 K Teff [3400/14853] Effective temperature
38- 40 I3 K e_Teff [31/180] Lower uncertainty in Teff
42- 44 I3 K E_Teff [32/179] Upper uncertainty in Teff
46- 49 A4 --- f_Tdisk Limit flag on Tdisk
50- 52 I3 K Tdisk [1/685] Disk temperature
54- 56 I3 K e_Tdisk [2/113]? Lower uncertainty in Tdisk
58- 60 I3 K E_Tdisk [5/125]? Upper uncertainty in Tdisk
62 A1 --- l_LIR/L* Limit flag on LIR/L*
64- 69 E6.1 --- LIR/L* [2.5e-05/9.9] IR to stellar luminosity ratio
71- 76 E6.1 --- e_LIR/L* [2e-06/1.5]? Uncertainty in LIR/L*
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Zoo Zooniverse identifier
12- 30 A19 --- WISEA WISE identifier (JHHMMSS.ss+DDMMSS.s)
32- 36 I5 K Teff [2500/12460] Effective temperature
38- 40 I3 K e_Teff [12/208] Lower uncertainty in Teff
42- 44 I3 K E_Teff [51/326] Upper uncertainty in Teff
46- 50 F5.2 --- alpha [-2.6/0.8]? Spectral index of disk
52- 55 F4.2 --- e_alpha [0.01/0.03]? Lower uncertainty in alpha
57- 60 F4.2 --- E_alpha [0.01/0.03]? Upper uncertainty in alpha
62- 68 F7.2 K Tdisk [127/1897] Disk temperature
71- 76 F6.2 K e_Tdisk [0.04/102] Lower uncertainty in Tdisk
79- 84 F6.2 K E_Tdisk [0.04/135] Upper uncertainty in Tdisk
86- 94 E9.3 --- LIR/L* [0.0002/2.2] IR to stellar luminosity ratio
96-104 E9.3 --- e_LIR/L* [1e-05/0.1] Lower uncertainty in LIR/L*
106-114 E9.3 --- E_LIR/L* [2e-05/0.3] Upper uncertainty in LIR/L*
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 22-Oct-2019