2018AJ....156..302D

Query : 2018AJ....156..302D

2018AJ....156..302D - Astron. J., 156, 302-302 (2018/December-0)

Discovery of a transiting adolescent sub-Neptune exoplanet with K2.

DAVID T.J., MAMAJEK E.E., VANDERBURG A., SCHLIEDER J.E., BRISTOW M., PETIGURA E.A., CIARDI D.R., CROSSFIELD I.J.M., ISAACSON H.T., CODY A.M., STAUFFER J.R., HILLENBRAND L.A., BIERYLA A., LATHAM D.W., FULTON B.J., REBULL L.M., BEICHMAN C., GONZALES E.J., HIRSCH L.A., HOWARD A.W., VASISHT G. and YGOUF M.

Abstract (from CDS):

The role of stellar age in the measured properties and occurrence rates of exoplanets is not well understood. This is in part due to a paucity of known young planets and the uncertainties in age-dating for most exoplanet host stars. Exoplanets with well-constrained ages, particularly those which are young, are useful as benchmarks for studies aiming to constrain the evolutionary timescales relevant for planets. Such timescales may concern orbital migration, gravitational contraction, or atmospheric photoevaporation, among other mechanisms. Here we report the discovery of an adolescent transiting sub-Neptune from K2 photometry of the low-mass star EPIC 247267267. From multiple age indicators, we estimate the age of the star to be 120 Myr, with a 68% confidence interval of 100-760 Myr. The size of EPIC 247267267 b (RP = 2.8 ± 0.1 R⊕) combined with its youth make it an intriguing case study for photoevaporation models, which predict enhanced atmospheric mass loss during early evolutionary stages.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): open clusters and associations: individual: Cas-Tau - planetary systems - planets and satellites: individual EPIC 247267267 b - planets and satellites: gaseous planets - planets and satellites: physical evolution - stars: low-mass

Simbad objects: 117

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Number of rows : 117
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 NAME THA MGr 00 00 -62.0           ~ 540 0
2 HD 1976 SB* 00 24 15.6540035976 +52 01 11.703208404 4.84 5.459 5.580     B5IV 151 0
3 HD 2626 ** 00 30 19.9344223392 +59 58 39.189476856 5.59 5.95 5.94     B7IV 63 0
4 * 13 Cas * 00 31 25.2291503064 +66 31 10.621018128   6.062 6.165     B6V 47 0
5 * lam Cas ** 00 31 46.3593467 +54 31 20.225689       6.25   B8Vn 143 0
6 HD 2974 * 00 33 34.5561778704 +60 32 55.143658176   7.89 7.89     B9 22 0
7 HD 3291 * 00 36 20.2407819600 +44 38 20.023981188   7.25 7.30     B8 20 0
8 * omi Cas Be* 00 44 43.5186007265 +48 17 03.731037403 3.91 4.44 4.50 4.45 4.50 B5IIIe 291 0
9 SK 17 s*b 00 47 38.9029190112 -73 22 53.855881572 11.563 12.324 12.236     B3Ia 39 0
10 HD 5409 * 00 56 45.6668260152 +60 01 59.376923076   7.91 7.8     A0 28 0
11 HD 6300 * 01 04 46.7991860016 +51 00 35.211986388   6.437 6.520     B3V 72 0
12 HD 6960 V* 01 11 25.5710702328 +64 12 09.640350540   5.488 5.548     B9.5V 58 0
13 HD 7349 * 01 14 35.7954256104 +49 25 46.706168676   7.33 7.34     B9 15 0
14 HD 8346 * 01 23 18.0926750520 +36 30 52.676555328   6.81 6.80     B8 17 0
15 HD 9709 Be* 01 36 03.0845452320 +47 06 52.096492044 6.590 7.020 7.070     B8V 44 0
16 HD 10404 V* 01 42 36.7523475384 +48 24 59.234701032   7.67 7.68     B8 22 0
17 * phi Per Be* 01 43 39.6379691568 +50 41 19.433124998 3.10 4.02 4.06 3.90 3.88 B1.5V:e-shell 594 0
18 HD 10577 SB* 01 44 13.7366965032 +48 12 40.740746868   7.030 7.002     B9 22 0
19 * 4 Ari PM* 01 48 10.9236879288 +16 57 19.857503880   5.809 5.841     B9.5V 85 0
20 HD 11104 * 01 50 18.4269809040 +48 30 56.493920916   8.27 8.28     B9 15 0
21 * 1 Per SB* 01 51 59.3200840608 +55 08 50.583693732 4.51 5.34 5.52     B1.5V 156 0
22 * eps Cas Be* 01 54 23.7340861680 +63 40 12.360238788 2.61 3.22 3.37 3.40 3.52 B3Vp_sh 207 0
23 HD 12518 * 02 04 13.1638265088 +51 58 04.042638624 6.32 6.612 6.661     B8 32 0
24 HD 12844 Em* 02 07 15.1333731576 +48 06 02.486472696   8.78 8.67     B9 19 0
25 HD 14372 * 02 20 41.5159199880 +47 18 38.885371596   6.065 6.154     B5V 58 0
26 * 63 And a2* 02 20 58.2015432888 +50 09 05.385224196   5.46 5.59     B9VpSi 118 0
27 BD+67 195 * 02 21 21.3956607312 +68 04 52.502732004   10.00 9.49     B2 16 0
28 HD 14795 * 02 25 26.6264885352 +60 00 19.285142256   7.66 7.65     B7V 32 0
29 HD 16219 SB* 02 37 20.8404309792 +39 53 45.957893172   6.409 6.522     B5V 56 0
30 HD 16485 * 02 40 20.9350415112 +49 33 36.929009988   6.67 6.59     B9V 18 0
31 HD 16449 * 02 40 36.9376303176 +56 50 38.048491356   9.14 9.01     B9V 19 0
32 BD+65 291 Pu* 02 47 09.4203315096 +65 43 18.705778680   9.39 9.09     B8 14 0
33 HD 17359 * 02 48 50.1775377216 +49 11 01.975725888   7.58 7.56     B9 21 0
34 * sig Ari * 02 51 29.5864456752 +15 04 55.443479016   5.411 5.516     B7V 102 0
35 HD 17443 * 02 51 32.7706770144 +67 48 54.157444632   9.04 8.75     B9V 44 2
36 HD 19736 * 03 12 09.5597906904 +42 22 33.276354960   6.031 6.139     B5V 49 0
37 HD 19981 SB* 03 14 08.4762789408 +40 07 08.525874324   6.99 7.04     B9 25 0
38 HD 20336 Be* 03 19 59.2693390128 +65 39 08.285606820 3.93 4.70 4.85 4.88 5.01 B2.5Vn(e) 226 0
39 HD 20510 * 03 20 06.2633961456 +50 58 07.540036500 8.786 7.11 7.06     B9V 48 0
40 * tau01 Ari EB* 03 21 13.6246249988 +21 08 49.438954890 4.68 5.260 5.355     B5IV 115 0
41 Cl Melotte 20 MGr 03 26 50.6 +48 51 48           ~ 928 0
42 Ass Per OB 3 As* 03 27 48.5 +49 54 02   15.36 13.93     ~ 40 0
43 * u Tau SB* 03 45 40.4433670200 +06 02 59.985349222   5.225 5.337     B3V 139 0
44 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
45 HD 23477 * 03 47 16.1226316656 +44 04 25.449043152   7.048 7.054   7.03 B9 28 0
46 HD 23383 * 03 47 32.1478965960 +55 55 19.051949424 7.763 6.063 6.082     B9Vnn 56 0
47 HD 23990 * 03 49 46.4941873182 +09 24 26.986474742 6.580 6.730 6.760     B9 27 0
48 V* V766 Tau a2* 03 51 15.8708072234 +13 02 45.875628119 5.88 6.32 6.38 6.36 6.39 B9pS 106 0
49 HD 23662 * 03 51 41.7756333480 +68 30 26.950213980   6.236 6.299     B9IVp 40 0
50 HD 24456 * 03 53 30.2287425010 +02 07 08.890777102   6.67 6.72     B9V 21 0
51 HD 26323 Em* 04 10 06.8498684726 +07 41 52.441120214   8.98 8.62     B9 22 0
52 K2-25b Pl 04 13 05.6131374072 +15 14 52.018080576           ~ 108 0
53 HD 26676 * 04 13 34.5706402104 +10 12 44.918270316   6.268 6.249     B8V 106 1
54 * mu. Tau * 04 15 32.0568707393 +08 53 32.491567629 3.74 4.205 4.279     B3IV 160 0
55 NAME CAS-TAU ASS MGr 04 16 +27.6           ~ 86 1
56 HD 27026 Pu* 04 18 08.1089490240 +42 08 28.194401724   6.132 6.205   6.27 B9V 52 0
57 * 53 Tau a2* 04 19 26.0975894496 +21 08 32.298968148   5.413 5.482     B9Vsp 283 0
58 HD 27528 * 04 20 09.0774915912 -16 26 14.170805628   6.759 6.790     B9V 35 0
59 * d Per bC* 04 21 33.1662438000 +46 29 55.964841936 4.31 4.757 4.812     B4IV 200 1
60 HD 27707 * 04 22 30.1299952488 +03 24 34.851782232 9.170 9.050 8.770     A4V 20 0
61 * 44 Eri * 04 28 32.1210545496 +01 22 50.971057824   5.429 5.532     B5III/IV 95 0
62 K2-136 PM* 04 29 38.9939167752 +22 52 57.793533924   12.48 11.20 10.90   K5.5V 92 0
63 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
64 HD 28715 * 04 31 50.4479922072 +05 45 52.024232736   6.66 6.67     B9V 20 0
65 HD 28796 * 04 32 24.4746716520 +00 58 48.466093188   7.20 7.25     B8V 18 0
66 NAME TAU-AUR T ASSOC Cl* 04 32 33 +26 04.6           ~ 48 0
67 HD 28843 Ro* 04 32 37.5537339576 -03 12 34.344832032 5.13 5.67 5.81     B9III 140 0
68 HD 29554 * 04 38 52.5209004312 -08 13 29.446664664   7.25 7.26     B9V 23 0
69 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
70 HD 286987 * 04 43 21.7154968488 +12 26 45.636639648   10.27 9.60     G0 16 0
71 HD 29866 Be* 04 44 13.0204976688 +40 47 11.217383880 5.86 6.14 6.08     B8V 110 0
72 * mu. Eri SB* 04 45 30.1514281206 -03 15 16.775320589 3.26 3.87 4.00     B5IV 170 0
73 HD 30122 * 04 45 42.4670020968 +23 37 40.775315448   6.386 6.329     B 71 0
74 HD 30409 * 04 49 26.5333496136 +44 14 22.657085232   8.38 8.33     B9V 28 0
75 HD 31799 * 04 58 36.8869657320 -04 33 33.349966452   8.18 8.08 8.2   A1V 25 0
76 HD 32884 * 05 06 13.0912787688 -03 29 05.818396308   7.66 7.64     B9.5V 34 0
77 * eta Aur PM* 05 06 30.8941413263 +41 14 04.112669983 2.33 3.00 3.18 3.23 3.40 B3V 391 0
78 K2-284b Pl 05 16 33.7635876744 +20 15 18.365704668           ~ 12 0
79 K2-284 PM* 05 16 33.7635876744 +20 15 18.365704668   14.713 13.322     M0V 20 0
80 2MASS J05163408+2015042 * 05 16 34.0857631680 +20 15 04.195348236           ~ 1 0
81 2MASS J05163432+2015228 * 05 16 34.3300804608 +20 15 22.280135508           ~ 1 0
82 * 17 Aur SB* 05 18 18.8960529504 +33 46 02.516925540   6.102 6.144     B9V+B9.5V 308 0
83 * 15 Cam EB* 05 19 27.8593918632 +58 07 02.515564308 5.62 6.088 6.125     B5V 72 0
84 HD 35034 * 05 23 00.1720806696 +29 43 44.390504784   8.03 8.03     B9 25 0
85 * 115 Tau ** 05 27 10.0947879432 +17 57 43.960547556   5.302 5.404     B5V 132 0
86 * 116 Tau * 05 27 45.6080941512 +15 52 26.581791360   5.522 5.515     B9.5Vn 52 0
87 HD 35785 * 05 27 47.8009323048 +15 03 56.768393304   8.67 8.60     B9 17 0
88 HD 35945 * 05 28 50.1010527216 +16 25 35.887164096   7.67 7.62     B9 24 0
89 * 118 Tau ** 05 29 16.50008 +25 09 00.7781 5.270 5.440 5.480     B9V 78 0
90 * 32 Ori ** 05 30 47.05091 +05 56 53.2925 3.51 4.07 4.20 4.26 4.40 B5IV+B7V 205 0
91 NAME 118 Tau group Cl* 05 32 +24.0           ~ 24 0
92 HD 36453 * 05 33 15.5363666496 +32 17 21.642244368   6.569 6.616     B9 25 0
93 * 125 Tau SB* 05 39 44.2007942808 +25 53 49.540025004 4.33 5.015 5.166     B3IV 119 0
94 HD 38670 ** 05 48 22.3626079104 +20 52 10.146772272   5.957 6.021     B9Vn 80 0
95 HD 39114 ** 05 52 13.8848110590 +38 33 36.302180990           B8 22 0
96 HD 39285 * 05 52 23.2996247184 +20 41 47.012662320   8.22 8.21     B9V 17 0
97 HD 39773A * 05 54 55.4516804393 +05 51 38.788267174   6.86 6.91     B9III 29 0
98 * nu. Ori SB* 06 07 34.3251233989 +14 46 06.510739548 3.6 4.240 4.397     B3IV 239 0
99 HD 44172 SB* 06 21 00.7780754688 +14 42 17.361751572   7.22 7.33     B6V 42 0
100 HD 46487 Pu* 06 33 37.9213970040 -01 13 12.553237092   4.934 5.079     B5IV/V 86 0
101 NAME AB Dor Moving Group MGr 06 38 53.4 -42 50 04           ~ 540 0
102 BD+14 1876 PM* 08 20 55.3290776448 +14 04 16.797469944 12.332 11.068 9.748 8.953 8.265 M0V 63 0
103 K2-95 * 08 37 27.0563032536 +18 58 36.021202824   19.86 17.27     M3V 77 0
104 K2-95b Pl 08 37 27.0563032536 +18 58 36.021202824           ~ 41 0
105 K2-100b Pl 08 38 24.3002838928 +20 06 21.828057218           ~ 83 0
106 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
107 IC 2391 OpC 08 41 17.5 -53 03 00           ~ 871 0
108 K2-264 * 08 45 26.0457995394 +19 41 54.446989270   18.33 16.41     M1.6 50 0
109 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
110 IC 2602 OpC 10 42 55.9 -64 25 22           ~ 735 0
111 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 894 0
112 V* GU Boo EB* 15 21 54.8243257728 +33 56 09.067285032     13.11     M0/M1.5 99 0
113 BD-19 4086 * 15 21 55.1983073496 -20 13 53.990924232   11.81 10.88     K3 38 0
114 K2-33b Pl 16 10 14.7377409264 -19 19 09.407629452           ~ 93 0
115 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
116 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1497 1
117 NGC 6811 OpC 19 37 21.8 +46 22 43   7.47 6.8     ~ 435 0

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