HST/NICMOS Observations of Variability in the Scattered Light from Young Stellar Objects

We have obtained a second epoch of Hubble Space Telescope NICMOS observations of seven Young Stellar Objects: HH 30, L1551 IRS5, IRAS 04016+2610, IRAS 04302+2247, Haro 6-5B, CoKu Tau/1 and DG Tau B. The first epoch observations were taken in 1997 as part of two different programs, while the second epoch were obtained in 2004 as part program to measure polarization in these objects. Data obtained during the first epoch utilized a variety of NICMOS filters, the results of which have been previously presented in the literature, with the exception of L1551 IRS5. Therefore, the multi-filter data obtained during the first epoch for L1551 IRS5 is also presented here. Data obtained as part of the second epoch included the polarization filters and the broad band F160W filter. All of the objects show significant variability in the scattered