2011AJ....142...60V


Query : 2011AJ....142...60V

2011AJ....142...60V - Astron. J., 142, 60 (2011/August-0)

The Palomar Transient Factory Orion project: eclipsing binaries and young stellar objects.

VAN EYKEN J.C., CIARDI D.R., REBULL L.M., STAUFFER J.R., AKESON R.L., BEICHMAN C.A., BODEN A.F., VON BRAUN K., GELINO D.M., HOARD D.W., HOWELL S.B., KANE S.R., PLAVCHAN P., RAMIREZ S.V., BLOOM J.S., CENKO S.B., KASLIWAL M.M., KULKARNI S.R., LAW N.M., NUGENT P.E., OFEK E.O., POZNANSKI D., QUIMBY R.M., GRILLMAIR C.J., LAHER R., LEVITAN D., MATTINGLY S. and SURACE J.A.

Abstract (from CDS):

The Palomar Transient Factory (PTF) Orion project is one of the experiments within the broader PTF survey, a systematic automated exploration of the sky for optical transients. Taking advantage of the wide (3°.5x2°.3) field of view available using the PTF camera installed at the Palomar 48 inch telescope, 40 nights were dedicated in 2009 December to 2010 January to perform continuous high-cadence differential photometry on a single field containing the young (7-10 Myr) 25 Ori association. Little is known empirically about the formation of planets at these young ages, and the primary motivation for the project is to search for planets around young stars in this region. The unique data set also provides for much ancillary science. In this first paper, we describe the survey and the data reduction pipeline, and present some initial results from an inspection of the most clearly varying stars relating to two of the ancillary science objectives: detection of eclipsing binaries and young stellar objects. We find 82 new eclipsing binary systems, 9 of which are good candidate 25 Ori or Orion OB1a association members. Of these, two are potential young W UMa type systems. We report on the possible low-mass (M-dwarf primary) eclipsing systems in the sample, which include six of the candidate young systems. Forty-five of the binary systems are close (mainly contact) systems, and one of these shows an orbital period among the shortest known for W UMa binaries, at 0.2156509±0.0000071 days, with flat-bottomed primary eclipses, and a derived distance that appears consistent with membership in the general Orion association. One of the candidate young systems presents an unusual light curve, perhaps representing a semi-detached binary system with an inflated low-mass primary or a star with a warped disk, and may represent an additional young Orion member. Finally, we identify 14 probable new classical T-Tauri stars in our data, along with one previously known (CVSO 35) and one previously reported as a candidate weak-line T-Tauri star (SDSS J052700.12+010136.8).

Abstract Copyright:

Journal keyword(s): binaries: close - binaries: eclipsing - open clusters and associations: individual: 25 Ori - planets and satellites: detection - stars: pre-main sequence - techniques: photometric

VizieR on-line data: <Available at CDS (J/AJ/142/60): table1.dat table3.dat>

Nomenclature: Tables 1, 3: [VCR2011] NN-NNNN N=82+16.

Simbad objects: 111

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Number of rows : 111
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* AA Tau Or* 04 34 55.4222683130 +24 28 53.038273587 13.14 13.34 12.20     K5Ve 666 0
2 2MASS J05194592+0201361 EB* 05 19 45.9260485005 +02 01 36.279479833       15.56   ~ 1 0
3 2MASS J05195397+0047438 EB* 05 19 53.9837012548 +00 47 43.861287809       17.37   ~ 1 0
4 2MASS J05195505+0058522 EB* 05 19 55.0565751496 +00 58 52.208788369       12.80   ~ 2 0
5 2MASS J05200049+0215159 EB* 05 20 00.4932303987 +02 15 15.949789413       15.62   ~ 1 0
6 2MASS J05200487+0046426 EB* 05 20 04.8868312412 +00 46 42.596061877       16.48   ~ 1 0
7 CRTS J052008.8+024545 EB* 05 20 08.8154672977 +02 45 46.055277008     18.44 18.09   ~ 3 0
8 2MASS J05201536+0230104 EB* 05 20 15.3608159106 +02 30 10.607422319     16.13 15.93   ~ 3 0
9 2MASS J05204154+0221186 EB* 05 20 41.5494868678 +02 21 18.828227031       16.07   ~ 1 0
10 2MASS J05210397+0240275 EB* 05 21 03.9642460305 +02 40 27.455582069       14.58   ~ 1 0
11 2MASS J05210774+0246397 EB* 05 21 07.7665251287 +02 46 39.757746481       17.11   ~ 2 0
12 UCAC2 32149298 Em* 05 21 10.3241717029 +01 22 20.322093791     15.2 14.55   ~ 2 0
13 2MASS J05211040+0138003 EB* 05 21 10.3973220837 +01 38 00.261317739     14.63 14.50   ~ 3 0
14 2MASS J05211191+0256189 EB* 05 21 11.9182699167 +02 56 19.050562040     16.43 16.23   ~ 2 0
15 2MASS J05213285+0110085 EB* 05 21 32.8641661149 +01 10 08.390656005     15.61 15.40   ~ 4 0
16 2MASS J05214195+0257109 EB* 05 21 41.9327389095 +02 57 10.873854539       17.12   ~ 1 0
17 2MASS J05214859+0226480 EB* 05 21 48.6010966487 +02 26 48.096800958     16.98 17.24   ~ 2 0
18 2MASS J05215079+0220205 EB* 05 21 50.7872012254 +02 20 20.510727805       13.90   ~ 1 0
19 2MASS J05215210+0121224 EB* 05 21 52.0999213935 +01 21 22.412860026     16.03 15.97   ~ 3 0
20 2MASS J05220211+0149141 EB* 05 22 02.1140594303 +01 49 14.116002031     15.97 15.73   ~ 3 0
21 2MASS J05220252+0114330 EB* 05 22 02.5782886378 +01 14 32.719049087       17.13   ~ 2 0
22 2MASS J05220972+0239392 EB* 05 22 09.7249623590 +02 39 39.250262448       14.24   ~ 2 0
23 2MASS J05224038+0225541 EB* 05 22 40.3836946589 +02 25 54.119606090       15.44   ~ 1 0
24 2MASS J05225353+0052179 EB* 05 22 53.5311657348 +00 52 17.938457911       17.03   ~ 1 0
25 2MASS J05230561+0044515 EB* 05 23 05.6114506343 +00 44 51.508117870       15.84   ~ 1 0
26 CVSO 590 TT* 05 23 05.9624549063 +01 38 51.135748730       16.18   M4e 7 0
27 CVSO 596 TT* 05 23 12.4068269935 +01 21 15.133666145       13.95   K6e 6 0
28 2MASS J05231240+0211079 EB* 05 23 12.4130003241 +02 11 07.907476628       16.67   ~ 1 0
29 2MASS J05234174+0111454 EB* 05 23 41.7412024875 +01 11 45.512838618       16.67   ~ 1 0
30 2MASS J05234296+0052244 EB* 05 23 42.9642815023 +00 52 24.455155189     14.18 13.98   ~ 4 0
31 2MASS J05234700+0200225 EB* 05 23 47.0122951150 +02 00 22.555901861     16.17 15.91   ~ 3 0
32 2MASS J05234877+0048078 EB* 05 23 48.7735234276 +00 48 07.820179471     15.29 15.04   ~ 3 0
33 2MASS J05235410+0108128 TT? 05 23 54.1053676081 +01 08 12.821545094     16.7 16.03   M1.9e 3 0
34 2MASS J05241461+0143004 EB* 05 24 14.6179637343 +01 43 00.523544803       13.16   ~ 1 0
35 2MASS J05241824+0217200 TT? 05 24 18.2431220450 +02 17 19.971111357       17.33   M3.5e 3 0
36 2MASS J05241975+0218507 EB* 05 24 19.7560158750 +02 18 50.581776262       16.63   ~ 1 0
37 2MASS J05244268+0131514 EB* 05 24 42.7007847379 +01 31 51.245480770     18.02 17.66   ~ 3 0
38 NAME 25 Ori Group OpC 05 24 48 +01 39.3           ~ 116 1
39 2MASS J05245720+0218173 EB* 05 24 57.2179639992 +02 18 17.800696017       16.93   ~ 1 0
40 Kiso A-0903 117 Y*O 05 25 04.6876968225 +01 20 50.977462285     16.9 15.95   M2.4e 6 0
41 2MASS J05254119+0249059 TT? 05 25 41.1995700759 +02 49 05.902446946       16.33   M1.5e 2 0
42 CVSO 35 TT* 05 25 45.914400 +01 45 50.11020   14.48 13.36 13.85 12.81 K7 16 0
43 CVSO 807 TT* 05 25 48.3941904071 +01 58 27.698373935     17.60 16.53 14.69 M4.25Ve 4 0
44 2MASS J05255688+0204050 EB* 05 25 56.8890589970 +02 04 05.008884854     16.68 16.47   ~ 3 0
45 2MASS J05255953+0157593 EB* 05 25 59.5365938500 +01 57 59.326375443       17.06   ~ 4 0
46 CRTS J052617.9+014924 EB* 05 26 17.8899648533 +01 49 25.735705005     17.63 17.65   ~ 3 0
47 2MASS J05262316+0156196 EB* 05 26 23.1686074560 +01 56 19.554983310     17.01 16.82   ~ 3 0
48 2MASS J05264107+0050147 EB* 05 26 41.0799356837 +00 50 14.630180917       14.19   ~ 2 0
49 Kiso A-0903 134 Y*O 05 26 55.3747636860 +01 40 22.400011853   16.40 15.56 15.99 14.82 ~ 13 0
50 2MASS J05270012+0101368 TT? 05 27 00.1276822145 +01 01 36.903801463       16.46   M3.2e 3 0
51 2MASS J05271446+0106585 EB* 05 27 14.4501858336 +01 06 58.433830110       14.28   ~ 2 0
52 2MASS J05272748+0058506 EB* 05 27 27.4769120186 +00 58 50.784777423       14.87   ~ 1 0
53 2MASS J05272875+0108267 EB* 05 27 28.7470799841 +01 08 26.729758162     17.25 17.00   ~ 4 0
54 2MASS J05275232+0101345 EB* 05 27 52.3182084074 +01 01 34.575240824     16.26 16.11   ~ 4 0
55 2MASS J05280235+0148015 EB* 05 28 02.3699688156 +01 48 01.603391583     16.89 16.75   ~ 3 0
56 2MASS J05282024+0121159 TT* 05 28 20.2479675606 +01 21 15.959453356       15.07   M0e 6 0
57 ASAS J052821+0338.5 Pe* 05 28 20.8305520540 +03 38 32.608040911           ~ 24 0
58 2MASS J05283707+0103024 EB* 05 28 37.0677433611 +01 03 02.551115895       15.80   ~ 1 0
59 2MASS J05284514+0120089 EB* 05 28 45.1535032763 +01 20 08.916242093       15.40   ~ 1 0
60 2MASS J05284629+0051248 EB* 05 28 46.2871949924 +00 51 24.858508883       15.71   ~ 2 0
61 2MASS J05285732+0059431 TT? 05 28 57.3171585343 +00 59 43.100097236       18.70   ~ 1 0
62 V* V1642 Ori A Y*? 05 29 20.6218092175 +00 41 27.941912748           K1V 15 0
63 2MASS J05292516+0255538 EB* 05 29 25.1577335535 +02 55 53.909261489       17.64   ~ 1 0
64 2MASS J05293750+0221251 EB* 05 29 37.5095660069 +02 21 25.114610220       17.75   ~ 2 0
65 2MASS J05293913+0149156 TT* 05 29 39.1418613085 +01 49 15.595777801       16.86   M4.3e 5 0
66 2MASS J05295140+0046337 EB* 05 29 51.4207570316 +00 46 33.797504771     17.47 17.48   ~ 4 0
67 2MASS J05295852+0102022 EB* 05 29 58.5280444478 +01 02 02.223340387       13.99   ~ 1 0
68 2MASS J05300573+0047249 EB* 05 30 05.7367908220 +00 47 24.980340740       17.11   ~ 1 0
69 UCAC4 460-010828 EB* 05 30 08.323416 +01 48 48.91032   14.88 13.70 13.31   ~ 5 0
70 CVSO 1241 TT* 05 30 12.4045850065 +01 48 21.399906659     17.5 16.47   M2e 4 0
71 2MASS J05301832+0118484 EB* 05 30 18.3258301089 +01 18 48.427462395       15.17   ~ 2 0
72 2MASS J05301942+0240378 EB* 05 30 19.4132744096 +02 40 37.410832565     17.21 17.04   ~ 3 0
73 Kiso A-0903 195 TT* 05 30 31.6525713918 +02 03 05.155028333   16.86 15.51 15.17   K7e 10 0
74 2MASS J05304150+0233503 EB* 05 30 41.4983046787 +02 33 50.260349979       16.31   ~ 2 0
75 2MASS J05305236+0133253 EB* 05 30 52.3486402044 +01 33 25.518172804     14.74 14.64   ~ 3 0
76 2MASS J05305436+0155497 EB* 05 30 54.3633413254 +01 55 49.656044650     13.22 13.65   ~ 3 0
77 2MASS J05305452+0056286 TT? 05 30 54.5179115100 +00 56 28.558946431       17.10   ~ 1 0
78 2MASS J05310413+0244486 EB* 05 31 04.133 +02 44 48.65       17.22   ~ 2 0
79 2MASS J05310883+0058008 EB* 05 31 08.840 +00 58 00.83     15.02 14.77   ~ 4 0
80 2MASS J05311632+0120299 EB* 05 31 16.3274792163 +01 20 29.976652791     14.96 14.64   ~ 3 0
81 2MASS J05312959+0241183 Y*O 05 31 29.6077317781 +02 41 18.350169065       15.88   ~ 2 0
82 2MASS J05313088+0130004 EB* 05 31 30.8738234178 +01 30 00.330539092       16.09   ~ 2 0
83 2MASS J05313758+0226397 SB* 05 31 37.5898017031 +02 26 39.610772166       12.67   ~ 3 0
84 2MASS J05313843+0157027 EB* 05 31 38.4356360088 +01 57 02.554779457     13.93 13.87   ~ 4 0
85 2MASS J05314668+0049260 EB* 05 31 46.6930944527 +00 49 26.139337872     16.85 16.68   ~ 4 0
86 2MASS J05315396+0242310 TT? 05 31 53.9612361550 +02 42 31.180764071       17.55   ~ 1 0
87 CVSO 1327 TT* 05 31 58.2023269189 +01 39 38.183026138       17.75   M3e 4 0
88 2MASS J05320774+0104117 EB* 05 32 07.7440203383 +01 04 11.689637763     15.62 15.33   ~ 4 0
89 2MASS J05320820+0132287 EB* 05 32 08.2019915657 +01 32 28.632899253       13.38   ~ 1 0
90 CRTS J053212.1+021546 EB* 05 32 12.1687101006 +02 15 46.205268958     18.20 17.88   ~ 2 0
91 CRTS J053214.6+010739 EB* 05 32 14.6326925020 +01 07 39.339316199     18.72 18.40   ~ 3 0
92 2MASS J05322562+0236214 EB* 05 32 25.6256768680 +02 36 21.515844501       16.50   ~ 1 0
93 2MASS J05322632+0223097 EB* 05 32 26.3203597801 +02 23 09.951989462       16.73   ~ 1 0
94 2MASS J05324332+0118566 EB* 05 32 43.3253850544 +01 18 56.423561325       15.79   ~ 1 0
95 2MASS J05325252+0222357 EB* 05 32 52.525 +02 22 35.71       13.61   ~ 2 0
96 2MASS J05330249+0238437 EB* 05 33 02.5049182074 +02 38 43.814199047       15.56   ~ 2 0
97 2MASS J05331720+0140498 EB* 05 33 17.2061717628 +01 40 49.791716822     14.88 14.83   ~ 7 0
98 2MASS J05332181+0153105 EB* 05 33 21.8167228032 +01 53 10.682809372     16.21 16.20   ~ 4 0
99 2MASS J05332318+0258281 EB* 05 33 23.1934671553 +02 58 28.130332014     13.59 13.46   ~ 6 0
100 2MASS J05332334+0257401 EB* 05 33 23.3475665014 +02 57 40.224087638     14.00 13.79   ~ 4 0
101 2MASS J05333535+0241314 EB* 05 33 35.3574846130 +02 41 31.360166543     16.01 15.94   ~ 3 0
102 2MASS J05334253+0149276 EB* 05 33 42.5381177272 +01 49 27.622096045       14.95   ~ 2 0
103 V* V1174 Ori Or* 05 34 27.8535605060 -05 41 37.876152541 16.506 15.070 14.305   12.367 M0 51 0
104 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2092 1
105 V* V2212 Ori Y*O 05 35 11.1412127665 -05 36 51.210193000 18.461 16.619 15.379   12.444 M2 54 0
106 2MASS J05351214-0531388 Y*O 05 35 12.1463732749 -05 31 38.821108760 19.716 18.292 17.169 15.68 13.554 M5 56 0
107 NAME Ori Region reg 05 35 17.30 -05 23 28.0           ~ 524 0
108 V* V2384 Ori EB* 05 35 21.8463185314 -05 46 08.560286991       19.21 17.28 M7 93 1
109 NAME Ori I As* 05 38 -02.8           ~ 574 0
110 CD-35 9931 TT* 14 58 37.6885363563 -35 40 30.390196098   11.92 10.75   9.85 K2.5IV 31 0
111 Ass Ori OB 1a As* ~ ~           ~ 210 0

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2021.12.06-18:54:28

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