2017ApJ...836..167D

Query : 2017ApJ...836..167D

2017ApJ...836..167D - Astrophys. J., 836, 167-167 (2017/February-3)

Characterizing K2 candidate planetary systems orbiting low-mass stars. I. Classifying low-mass host stars observed during Campaigns 1-7.

DRESSING C.D., NEWTON E.R., SCHLIEDER J.E., CHARBONNEAU D., KNUTSON H.A., VANDERBURG A. and SINUKOFF E.

Abstract (from CDS):

We present near-infrared spectra for 144 candidate planetary systems identified during Campaigns 1-7 of the NASA K2 Mission. The goal of the survey was to characterize planets orbiting low-mass stars, but our Infrared Telescope Facility/SpeX and Palomar/TripleSpec spectroscopic observations revealed that 49% of our targets were actually giant stars or hotter dwarfs reddened by interstellar extinction. For the 72 stars with spectra consistent with classification as cool dwarfs (spectral types K3-M4), we refined their stellar properties by applying empirical relations based on stars with interferometric radius measurements. Although our revised temperatures are generally consistent with those reported in the Ecliptic Plane Input Catalog (EPIC), our revised stellar radii are typically 0.13 R☉ (39%) larger than the EPIC values, which were based on model isochrones that have been shown to underestimate the radii of cool dwarfs. Our improved stellar characterizations will enable more efficient prioritization of K2 targets for follow-up studies.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): planetary systems - planets and satellites: fundamental parameters - stars: fundamental parameters - stars: late-type - stars: low-mass - techniques: spectroscopic - techniques: spectroscopic

VizieR on-line data: <Available at CDS (J/ApJ/836/167): table3.dat table4.dat table5.dat table6.dat table7.dat>

Simbad objects: 144

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Number of rows : 144
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 K2-88 LM* 03 39 00.3768572904 +19 07 12.623692476   17.00 15.48 15.09   M1V 13 0
2 HAT 307-02346 * 03 42 52.0413370296 +17 06 05.431121388   14.15 12.99 12.62   K2V 15 0
3 K2-84 * 03 43 14.2224316704 +16 38 04.372746576   14.43 13.44 13.19   K2V 12 0
4 K2-89 LM* 03 48 16.0102157808 +20 27 34.683025716           M1V 21 0
5 V* V359 Tau Er* 03 49 27.6363599256 +24 31 54.206428620   17.522 15.991   13.541 K0III 44 0
6 K2-81 LM* 03 49 56.5181777712 +14 30 07.957017432   15.56 14.36 14.09   K3V 14 0
7 UCAC4 553-007895 RG* 03 51 09.3645154416 +20 32 06.284266656   14.62 13.28 12.84   K3III 11 0
8 ATO J058.1790+15.2284 LM* 03 52 43.0088311800 +15 13 42.807730980   16.13 14.68 14.51   M1V 9 0
9 UCAC4 549-008009 * 03 55 16.0407418224 +19 46 18.786354960   15.310 14.279 13.762   K3V 3 0
10 UCAC4 554-007904 * 03 55 25.5522971352 +20 39 36.774497340   14.472 13.521 13.281   K0V 6 0
11 UCAC4 574-009201 RG* 03 56 18.9804288672 +24 39 39.154174632   14.26 13.38 13.17   G5III 11 0
12 Wolf 1313 PM* 03 56 31.8604224528 +23 54 42.411629376   14.42 13.46 13.35   K2V 3 0
13 K2-90 LM* 03 56 36.5759314920 +22 28 21.529008984   15.18 13.86 13.37   K5V 20 0
14 K2-85 LM* 03 57 51.4566233496 +18 27 54.887027148   13.80 12.83 12.14   K5V 22 0
15 K2-83 LM* 03 59 36.3741354168 +15 33 31.969342512           M1V 26 0
16 UCAC4 521-007173 Em* 04 01 29.3630354880 +14 00 00.596235384   14.14 13.08 12.73   K3V 10 0
17 UCAC4 576-010017 * 04 01 43.9544821416 +25 07 23.794229136   14.187 13.111 12.848   K2V 7 0
18 UCAC4 533-007720 LM* 04 01 51.1933633056 +16 26 00.070517004   17.230 15.585     M2V 9 0
19 K2-174 LM* 04 03 10.2793012032 +16 20 50.761850964           K7V 26 0
20 TYC 1259-817-1 * 04 10 07.9027218552 +19 24 40.224466620   13.14 11.40     K2III 16 0
21 K2-91 LM* 04 12 52.3275335616 +24 12 18.387456228   17.08 15.57 15.27   M3V 22 0
22 UCAC4 520-007695 EB* 04 17 18.0613764682 +13 48 17.509574123   14.183 13.058     G2V 12 0
23 UCAC4 546-009241 EB* 04 18 34.7828701104 +19 10 44.584146768   14.510   13.333   G5V 11 0
24 K2-87 * 04 24 56.6990104824 +18 49 38.714232324   15.31 14.13 13.96   K1V 23 0
25 K2-338 PM* 08 17 26.6595110352 +17 01 27.712844652   14.50 13.45 13.08   K3V 9 0
26 UCAC4 522-045574 * 08 20 51.4934392848 +14 15 31.215584628   15.31 14.29 13.98   K3V 9 0
27 UCAC4 564-043555 PM* 08 23 56.8978660008 +22 39 46.937552760   13.05 12.03 11.71   K3V 11 0
28 UCAC2 39843981 * 08 24 05.6560392624 +22 46 59.801187396   14.11 13.21 12.95   K3V 16 0
29 2MASS J08243303+1745431 LM* 08 24 33.0306405192 +17 45 43.146988632           M0V 7 0
30 K2-122 LM* 08 25 54.3166744584 +20 21 34.445418480           M0V 35 0
31 K2-121 LM* 08 27 44.8140027552 +17 34 45.801763968   14.39 13.32 12.98   K5V 31 0
32 LP 425-186 PM* 08 27 53.5061216732 +17 33 35.737527299   17.9   15.8   ~ 16 0
33 UCAC4 539-045762 LM* 08 30 36.31344 +17 41 49.8624       16.07   M4V 5 0
34 K2-97 RG* 08 31 03.0821917608 +10 50 51.309573576           K2III 40 0
35 2MASS J08325907+1718235 LM* 08 32 59.0669645712 +17 18 23.443541640           M3V 38 0
36 UCAC4 537-046888 * 08 33 14.6584785408 +17 15 41.625095760   15.39 14.34 13.88   K3V 8 0
37 UCAC4 511-046372 LM* 08 35 25.81344 +12 04 33.3228   15.68 14.09 13.65   M2V 15 0
38 2MASS J08354235+1647214 LM* 08 35 42.3551463096 +16 47 21.443428284           K7V 9 0
39 UCAC4 525-048681 ** 08 36 15.592464 +14 48 46.01520   14.932 13.721 13.292   K3V 2 0
40 TYC 805-1346-1 SB* 08 37 12.5349963624 +11 54 56.739419028   12.18 12.15     G5V 15 0
41 K2-104 LM* 08 38 32.8359046503 +19 46 25.591543965   18.46 16.26     M1V 72 0
42 K2-146 LM* 08 40 06.4242250368 +19 05 34.430759088   17.87 16.25 15.97   M3.0V 49 0
43 K2-102 Ro* 08 40 13.4534275080 +19 46 43.709186244   14.318 13.200     K3V 80 0
44 UCAC4 536-048169 * 08 40 34.9958292336 +17 04 40.731176676   15.56 14.60 14.14   K5V 5 0
45 K2-101 Ro* 08 41 22.5783027954 +18 56 01.947224876   13.970 12.957     K3V 89 0
46 K2-103 LM* 08 41 38.4893118114 +17 38 24.084971669           K7V 64 0
47 UCAC4 540-047604 LM* 08 42 51.8399183016 +17 52 44.296822956   17.59 16.45 15.78   M4V 3 0
48 2MASS J08425550+1716582 * 08 42 55.5060543288 +17 16 58.243158804           K5V 13 0
49 K2-270 * 08 45 03.9866483880 +13 32 59.388717048   14.82 13.78 13.63   K4V 20 0
50 K2-119 LM* 08 48 02.3358945336 +16 54 06.705457380           K5V 21 0
51 K2-118 LM* 08 48 30.4546935960 +15 39 21.530490516           K3V 11 0
52 K2-120 ** 08 48 34.317048 +17 11 26.46924   15.15 14.04 14.07   M0V 16 0
53 K2-275 * 08 48 40.7766005448 +20 27 18.299250288   13.02 12.06 11.82   K3V 22 0
54 LINEAR 5230123 LM* 08 50 21.546576 +15 50 17.07108   16.94 15.43 15.19   M3V 12 0
55 UCAC4 500-052539 Em* 08 52 29.3614798008 +09 57 45.836513892   16.17   14.21   M1V 11 0
56 2MASS J08525582+1056409 LM* 08 52 55.8284432976 +10 56 40.990413912           M1V 19 0
57 UCAC4 503-050821 LM* 08 53 41.6689094712 +10 33 52.155473544   16.60 15.23 14.80   M0V 8 0
58 K2-124 LM* 08 54 33.8861794008 +23 07 58.430659224           M3V 19 0
59 K2-117 LM* 08 55 25.3640756544 +10 28 08.903554284           M1.0V 24 0
60 K2-123 LM* 08 57 46.6064421192 +21 27 12.701726388           M0V 21 0
61 K2-419 LM* 09 00 04.7541565584 +13 16 25.760912160   17.82 16.58     M0V 13 0
62 2MASS J09042104+1946489 LM* 09 04 21.0559264248 +19 46 48.862161228           M4V 5 0
63 UCAC4 551-045960 LM* 09 04 21.2042750952 +20 03 55.658450088   15.95 14.66 14.35   K7V 7 0
64 UCAC4 549-046418 LM* 09 04 37.7311436832 +19 42 52.561707552   15.97   14.32   M0V 10 0
65 K2-43 LM* 11 16 28.1168245368 -03 58 31.556187876   17.25 15.60 15.51   K7V 23 0
66 K2-22 LM* 11 17 55.8772962552 +02 37 08.603363784   17.04 15.60 15.38   K7V 50 0
67 K2-45 LM* 11 18 31.8901493736 -01 46 26.945994720   17.05 15.78 15.66   M0V 15 0
68 K2-35 LM* 11 20 24.7400991768 +01 17 09.424414932   15.56 14.37 13.95   K4V 26 0
69 2MASS J11351872+0356028 LM* 11 35 18.7183141224 +03 56 02.897689416           M2V 8 0
70 K2-4 LM* 11 38 58.9542003048 -03 54 20.046522024   16.23 14.91 14.57   K7V 23 0
71 K2-16 V* 11 40 23.3403230208 +04 33 26.417120508   15.65 14.65 14.44   K3V 23 0
72 K2-14 LM* 11 52 13.6906095960 +02 35 39.237621828   17.74 16.31     M0V 17 0
73 K2-17 LM* 11 53 19.1470266312 +06 24 44.105440536   14.82 13.52 13.10   K5V 25 0
74 UCAC4 462-048516 LM* 11 57 57.9987730560 +02 19 17.302806732   16.34 14.86 14.41   M1V 15 0
75 UCAC4 403-056690 * 13 12 14.3987810904 -09 34 17.418545076   14.654 13.734 13.761   K1III 1 0
76 UCAC4 365-063681 EB* 13 19 54.3926377704 -17 10 52.148740620   15.69 14.79 14.81   M1III 5 0
77 UCAC2 28380251 ** 13 21 09.733776 -09 56 57.00516   14.88 13.76 13.66   K7V 13 0
78 UCAC4 413-058171 * 13 22 20.0305140096 -07 29 47.019084972   14.480 13.449 13.119   K3V 5 0
79 PM J13269-0845 ** 13 26 56.925048 -08 45 46.84716   14.52 12.99 12.58   M3V 15 0
80 HD 117012 EB* 13 27 40.8110220792 -13 18 37.080990180   10.51 9.30     K0III 12 0
81 UCAC4 421-058607 * 13 29 31.3143280344 -05 56 27.939292944   15.632 14.668 14.571   G5III 1 0
82 UCAC4 401-055597 LM* 13 29 33.7568638056 -09 48 36.655354944       16.15   M3V 7 0
83 UCAC4 407-056645 LM* 13 29 56.5560302712 -08 44 58.741967256       15.29   M0V 7 0
84 2MASS J13302656-1120294 LM* 13 30 26.5588828968 -11 20 29.388659172           M1V 5 0
85 K2-377 PM* 13 31 35.5956326448 -12 05 42.366374484   15.31 14.05 13.78   K5V 9 0
86 2MASS J13322094-1703403 * 13 32 20.9449910592 -17 03 40.219530696           K3V 8 0
87 UCAC4 408-058423 LM* 13 33 15.4424484144 -08 29 04.327761192       15.70   M2V 6 0
88 2MASS J13332238-1600238 LM* 13 33 22.3774626384 -16 00 23.854010328           M3V 3 0
89 K2-126 LM* 13 34 11.1701163360 -13 34 36.969050316   14.15 12.92 12.49   K7V 24 0
90 K2-125 LM* 13 36 34.1064610896 -14 56 51.376011360   17.55 16.12 15.77   M2V 7 0
91 K2-310 PM* 13 36 53.2096541736 -07 19 05.350809756   15.963 14.836 14.58 13.626 K3V 11 0
92 K2-128 LM* 13 37 45.0384385488 -08 35 49.442005968   13.75 12.63 12.34   K4V 15 0
93 UCAC4 395-056089 PM* 13 37 45.6201492960 -11 11 33.271067040   14.14 13.18 13.20   K2V 11 0
94 UCAC4 395-056090 LM* 13 37 46.0285315128 -11 11 32.058830220       15.00   K7V 6 0
95 UCAC4 381-065305 LM* 13 40 02.1601260024 -13 55 55.250997168   17.48 16.03 15.82   M3V 6 0
96 UCAC4 390-059466 PM* 13 42 54.0968466096 -12 02 18.938992848   15.553 14.477 14.406   K3V 1 0
97 UCAC4 384-063577 * 13 43 16.9113773184 -13 21 25.681055184   14.510 13.408 13.211   K5V 1 0
98 UCAC2 28026818 PM* 13 43 25.9567824648 -10 53 48.869644560   13.116 12.019 11.84 10.94 K1III 20 0
99 UCAC4 389-058721 * 13 43 38.5787983416 -12 12 04.684619016   15.341 14.100 13.962   K4V 2 0
100 UCAC4 417-057099 * 13 44 31.8219333720 -06 47 03.424436484       14.61   K1V 3 0
101 K2-127 LM* 13 48 18.8144763000 -11 35 20.354028612   16.00 15.04 14.88   K3V 12 0
102 K2-110 PM* 13 49 23.8898803200 -12 17 04.123044132   12.83 11.91 11.79 10.92 K2V 37 0
103 UCAC4 419-057572 LM* 13 49 31.6905237816 -06 19 26.884881984           M3V 7 0
104 TYC 4973-277-1 LM* 13 49 32.3996133792 -06 19 21.920847204   12.82 11.73     M0V 15 0
105 Qatar 2 PM* 13 50 37.4100326640 -06 48 14.421574044   14.0   13.45   K5V 72 1
106 K2-199 PM* 13 55 36.4096345752 -06 08 10.136734728           K5V 27 0
107 UCAC2 26896935 * 13 57 38.1635075640 -13 56 33.598674492   14.57 13.49 13.22 12.291 K0III 13 0
108 UCAC4 307-086388 * 16 16 16.0578443400 -28 38 56.881255920   14.76 13.03 12.59   K4III 17 0
109 K2-53 * 16 16 34.0355562768 -20 24 01.861488648           K2V 19 0
110 CRTS J161641.3-255849 SB* 16 16 41.2907177928 -25 58 49.881752076     11.94     F2III 10 0
111 K2-52 * 16 26 26.7312267096 -24 58 11.817792012           F8III 11 0
112 K2-289 * 16 26 34.3300013328 -15 47 32.564608008           K1V 9 0
113 UCAC4 353-080513 * 16 33 35.8205724552 -19 28 45.271479180           K0V 9 0
114 UCAC4 355-079464 EB* 16 33 47.6800888416 -19 10 40.005588108   15.691 14.289 14.129   G5V 10 0
115 UCAC4 353-082225 RG* 16 47 33.2219437320 -19 34 45.553575540   14.702 13.379 13.204   K0III 17 0
116 UCAC4 326-175747 * 18 43 21.0876113448 -24 57 36.144765000     12.313 12.013   K0III 3 0
117 UCAC4 336-174262 * 18 45 22.5057471936 -22 56 24.325687680   14.405 13.504 13.356   G8V 5 0
118 UCAC4 320-201794 LP? 18 45 23.2774224192 -26 01 23.616790860       13.511   M3III 4 0
119 UCAC4 325-189256 Pe* 18 47 03.7867356600 -25 05 29.031969552   15.901 13.955 13.672   M0III 2 0
120 TYC 6863-304-1 * 18 49 00.7861526520 -24 46 37.473924828   12.739 10.917     K7III 7 0
121 UCAC4 328-177684 * 18 49 48.4047068544 -24 24 43.852875840   14.115 12.330 11.952   K4III 5 0
122 UCAC4 322-195089 * 18 51 19.7212287864 -25 36 57.232958364   14.755 13.296 13.061   K4III 4 0
123 K2-379 * 18 52 07.6262534304 -27 10 49.955575980     13.213 13.072   K3V 9 0
124 ASAS J185602-1934.6 LP? 18 56 02.3094837864 -19 34 35.869723644           M2III 4 0
125 UCAC4 316-222664 LM* 19 01 54.1784730528 -26 57 45.988863552   13.59 12.35 11.97   K7V 7 0
126 UCAC4 363-174709 * 19 05 14.7939025728 -17 29 36.417760620   14.954 13.725 13.368   K2V 4 0
127 UCAC4 312-239522 LM* 19 07 24.3756660744 -27 47 31.960024656       15.76   M3V 6 0
128 K2-381 * 19 12 06.4612275240 -21 00 27.507150540   14.06 13.01 12.68   K2V 15 0
129 UCAC4 319-212955 LM* 19 14 00.5695244904 -26 17 04.123140720   15.99 14.46 14.15   M1V 5 0
130 LP 868-19 LM* 19 16 35.5932786007 -25 38 41.926683491     13.630 13.387   M3V 29 0
131 K2-130 LM* 19 21 04.8632098464 -19 41 26.909494944   13.96 12.76 12.41   K5V 12 0
132 LP 869-4 LM* 19 26 41.5683692664 -21 32 20.680675944     13.499 13.200   M2V 16 0
133 BD-11 5779 PM* 22 12 50.8212760972 -10 55 31.349021617   11.634 10.689 10.477   K2V 38 0
134 HD 210803 SB* 22 13 10.74742 -11 10 38.4888   10.33 9.54 9.73 8.501 K2IV 34 0
135 K2-55 LM* 22 15 00.4644231816 -17 15 02.537027892   14.75 13.55 13.24 12.09 K7V 30 0
136 K2-62 PM* 22 17 27.4023572280 -12 11 15.010119528   13.51 12.40 12.20 11.19 K3V 24 0
137 UCAC4 383-163835 PM* 22 18 06.3663302520 -13 26 14.416040688       13.385   M2III 9 0
138 LP 759-72 LM* 22 18 29.2548547872 -09 36 44.381088036     15.04     M2V 42 0
139 UCAC4 384-156546 * 22 20 42.9364244544 -13 15 08.262695556   14.868 13.651 13.247   K4V 3 0
140 LP 700-6 LM* 22 22 29.8611412421 -07 57 19.853459655     15.81     M4V 26 0
141 BD-12 6259 LM* 22 24 36.3826762824 -11 34 43.288505076   12.20 10.758 10.480   K7V 30 0
142 UCAC4 410-142887 LM* 22 28 20.4070178520 -08 02 29.472360972   16.826   14.775   M1V 5 0
143 K2-367 * 22 31 26.1378590304 -13 15 52.674214680   14.939 13.803 13.515   K3V 16 0
144 K2-21 LM* 22 41 12.8862475392 -14 29 20.349161520   14.14 12.85     M0V 33 0

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