# Summary of K2 Program GO7039

Title: Asteroseismology of Solar-Type Stars with K2

PI: Davies, Guy Rhys (University of Birmingham)
CoIs: Chaplin, William J; Basu, Sarbani; Huber, Daniel; Latham, David W.

We propose a selection of bright solar-type stars, including cool main-
sequence dwarfs and sub-giants, for asteroseismic observations in K2 Fields 6 and 7. These stars are predicted to show detectable solar-like oscillations with periods of the order of minutes. Short cadence data are therefore a pre-requisite for detecting the oscillations. Our list comprises stars that will be prime targets for one of the main goals of K2, the detection of exoplanets around bright solar-type stars, for which precise RV follow-up will be possible. We seek to take advantage of the opportunity to have Kepler observe targets for asteroseismology that are typically brighter than those observed in the nominal Mission. Because the targets are brighter, much more accurate and detailed prior constraints (e.g., from parallaxes, detailed spectroscopy, interferometry, etc.) will be available on these stars than was usually the case for asteroseismic targets in the original field. It will therefore be possible to bring the full potential of asteroseismology to bear to test the physics of stellar interiors. It will also be possible to go beyond studying stellar structure, to put constraints on the evolution of the solar neighbourhood. These solar-type targets in Field 6 and 7, along with the targets from previous and future fields, will allow us to constrain the age-metallicity relation of nearby field stars in a manner that has not been possible before. Note that asteroseismic data can constrain stellar ages much better than any other method. By providing asteroseismic ages of stars with detectable surface rotation periods we will also provide additional calibrators for gyrochonology. And of course, asteroseismology will allow us to better characterize targets that have detected exoplanets, including any new detections made by K2 and also already-known hosts that are on our list.

# Targets requested by this program that have been observed (34)
EPIC ID, RA (J2000) [deg], Dec (J2000) [deg], magnitude, Investigation IDs
213279447, 287.6151428, -30.0071163, 6.463, GO7039_LC|GO7078_LC|GO7071_LC|GO7030_LC
213332010, 287.6742554, -29.8136673, 7.878, GO7039_LC|GO7087_LC|GO7030_LC|GO7039_SC
213387881, 290.414032, -29.6054649, 6.996, GO7039_LC|GO7087_LC|GO7030_LC
213410372, 290.5160828, -29.5230808, 6.989, GO7039_LC|GO7078_LC|GO7087_LC|GO7030_LC
213461346, 285.5818481, -29.3419209, 8.541, GO7039_LC|GO7030_LC|GO7039_SC
213554577, 289.8565369, -29.0210304, 8.1, GO7039_LC|GO7016_LC|GO7030_LC|GO7039_SC
213836600, 283.9950562, -28.1302299, 8.351, GO7039_LC|GO7078_LC|GO7030_LC
213841509, 284.2770996, -28.115839, 8.961, GO7039_LC|GO7087_LC|GO7030_LC|GO7039_SC
213873758, 293.1680603, -28.0198078, 6.99, GO7039_LC|GO7087_LC|GO7046_LC|GO7030_LC
214049657, 283.8886719, -27.5170612, 9.324, GO7086_LC|GO7039_LC|GO7087_LC|GO7030_LC|GO7039_SC
214073502, 293.7866821, -27.4518013, 9.123, GO7086_LC|GO7039_LC|GO7087_LC|GO7030_LC|GO7039_SC
214112021, 281.5677795, -27.3463554, 8.273, GO7039_LC|GO7078_LC|GO7087_LC|GO7030_LC
214155925, 287.2690125, -27.2271137, 9.068, GO7039_LC|GO7087_LC|GO7030_LC|GO7039_SC
214287331, 288.4848022, -26.8762569, 7.08, GO7039_LC|GO7030_LC
214378308, 286.436554, -26.6420746, 8.878, GO7039_LC|GO7078_LC|GO7087_LC|GO7030_LC|GO7039_SC
214722449, 281.1852112, -25.7976856, 8.267, GO7086_LC|GO7039_LC|GO7078_LC|GO7016_LC|GO7087_LC|GO7030_LC
214905993, 281.1723938, -25.3699093, 8.431, GO7086_LC|GO7039_LC|GO7016_LC|GO7087_LC|GO7030_LC|GO7039_SC
214974178, 281.8243713, -25.2162437, 9.031, GO7039_LC|GO7016_LC|GO7087_LC|GO7030_LC|GO7039_SC
215035735, 294.2583618, -25.080267, 8.285, GO7039_LC|GO7016_LC|GO7087_LC|GO7030_LC|GO7039_SC
215051461, 284.0017395, -25.0457458, 7.295, GO7039_LC|GO7078_LC|GO7087_LC|GO7030_LC
215225833, 286.2498474, -24.6669731, 8.406, GO7039_LC|GO7030_LC
216056514, 291.2757568, -23.0418282, 7.543, GO7039_LC|GO7078_LC|GO7030_LC
216228024, 295.0988159, -22.7284832, 8.873, GO7039_LC|GO7078_LC|GO7016_LC|GO7087_LC|GO7030_LC|GO7039_SC
216259393, 280.9279785, -22.6704502, 7.965, GO7039_LC|GO7078_LC|GO7087_LC|GO7030_LC
216769803, 289.2956848, -21.757021, 8.202, GO7039_LC|GO7016_LC|GO7087_LC|GO7030_LC
216896381, 286.0845337, -21.5314617, 7.995, GO7086_LC|GO7039_LC|GO7078_LC|GO7087_LC|GO7030_LC
216931153, 287.4134827, -21.4696732, 8.36, GO7039_LC|GO7087_LC|GO7030_LC
218197771, 288.1837158, -19.2355499, 8.085, GO7039_LC|GO7016_LC|GO7087_LC|GO7030_LC
218683659, 291.9170532, -18.3508396, 8.801, GO7039_LC|GO7078_LC|GO7030_LC|GO7039_SC
218837285, 288.6373596, -18.0597706, 8.259, GO7039_LC|GO7078_LC|GO7016_LC|GO7030_LC|GO7039_SC
218910907, 289.4041748, -17.9217567, 8.053, GO7039_LC|GO7016_LC|GO7030_LC|GO7039_SC
219119080, 285.1069946, -17.4843693, 7.69, GO7039_LC|GO7030_LC
219179379, 285.460022, -17.3516216, 8.203, GO7039_LC|GO7030_LC|GO7039_SC
219565258, 288.0404663, -16.4304886, 8.382, GO7039_LC|GO7087_LC|GO7030_LC|GO7039_SC