# Summary of K2 Program GO4015

Title: Using K2 to probe variability in young stellar objects

PI: Akeson, Rachel L (Caltech)
CoIs: Ciardi, David R; Turner, Neal; Carpenter, John M; Hartmann, Lee; Beichman, Charles A.; Stauffer, John R.; Rebull, Luisa; hillenbrand, lynne a; Cody, Ann Marie

We propose to observe 17 objects in or near the Taurus star formation region.  Seven of these objects are known young stars in Taurus, five are likely to be younger than a few hundred Myr and five show some signatures of youth but need validation as young stellar objects. Our specific goals are to 1) Obtain the best possible light curve for T Tau, the original, defining member of the class of young stellar objects, as well as other young stellar objects, in order to quantitatively characterize the variability and to examine the physical origin of this variability, 2) determine the variability types, levels, and time scales for all objects, 3) correlate the measured variations with known properties of the objects such as infrared excess level, and 4) compare the variations of the Taurus objects to those previously observed for young stars in other star formation regions.

This proposal addresses the NASA astrophysics strategic goal to explore the origin and evolution of stars.  New data with K2 is required to address these science goals as the original Kepler field did not contain any objects at this early evolutionary state in the formation of stars and planets.

# Targets requested by this program that have been observed (14)
EPIC ID, RA (J2000) [deg], Dec (J2000) [deg], magnitude, Investigation IDs
210612142, 65.586623, 17.136604, 17.89, GO4090_LC|GO4092_LC|GO4015_LC
210716088, 66.746593, 18.596865, 19.403, GO4090_LC|GO4092_LC|GO4015_LC
210780789, 65.555513, 19.577566, 14.2, GO4076_LC|GO4090_LC|GO4092_LC|GO4015_LC
210865655, 62.618105, 20.8641, 17.439, GO4015_LC
210929228, 61.378688, 21.852944, 14.089, GO4057_LC|GO4076_LC|GO4097_LC|GO4090_LC|GO4092_LC|GO4015_LC
210936710, 61.16405, 21.971816, 14.26, GO4020_LC|GO4057_LC|GO4023_LC|GO4076_LC|GO4097_LC|GO4090_LC|GO4092_LC|GO4015_LC
210936757, 61.166032, 21.972631, 13.125, GO4020_LC|GO4057_LC|GO4060_LC|GO4097_LC|GO4090_LC|GO4092_LC|GO4015_LC
210955775, 62.773785, 22.275365, 14.093, GO4020_LC|GO4097_LC|GO4011_LC|GO4015_LC
211038410, 58.82962, 23.583818, 17.703, GO4090_LC|GO4092_LC|GO4015_LC
211067472, 61.819718, 24.04937, 17.828, GO4090_LC|GO4092_LC|GO4015_LC
211104793, 63.16959, 24.637709, 13.798, GO4020_LC|GO4090_LC|GO4015_LC
211137540, 60.518384, 25.202835, 18.301, GO4090_LC|GO4092_LC|GO4015_LC
211159819, 58.649871, 25.618936, 12.146, GO4020_LC|GO4090_LC|GO4092_LC|GO4015_LC
211159865, 58.648171, 25.619768, 13.524, GO4020_LC|GO4076_LC|GO4090_LC|GO4092_LC|GO4015_LC