An Aggregate of Young Stellar Disks in Lynds 1228 South

September 2004 • 2004ApJS..154..433P

Authors • Padgett, Deborah L. • Rebull, L. M. • Noriega-Crespo, A. • Carey, Sean J. • Stapelfeldt, Karl R. • Stauffer, John R. • Burgdorf, Martin J. • Cole, D. M. • Fajardo-Acosta, S. B. • Frayer, D. T. • Helou, G. • Hoard, D. W. • Karr, J. • Latter, W. B. • Lowrance, P. J. • O'Linger, J. • Masci, F. • Ramirez, S. • Reach, W. T. • Rho, Jeonghee • Stolovy, S. R. • Wachter, S.

Abstract • Using the Multiband Imaging Photometer for Spitzer (MIPS) and Infrared Array Camera (IRAC) instruments on the Spitzer Space Telescope, we have investigated an aggregate of at least nine candidate bright young stellar objects in the southern region of the Lynds 1228 cloud in Cepheus. The spectral energy distributions (SEDs) encompass both infrared Class II and Class III types, and at least one object has no excess at wavelengths shorter than 24 μm. There are five known IRAS sources in the region. We find that the fluxes of these sources are generally overestimated by IRAS because of confusion, and one appears in both the IRAS Point Source and Faint Source Catalogs. This small group of young stellar objects provides a good example of the power of Spitzer to resolve star-forming regions confused in the IRAS catalogs. The SEDs of these sources illustrate that there can be a diversity of disk evolutionary states within a coeval stellar aggregate.


IPAC Authors

Sean Carey

Senior Scientist

George Helou

IPAC Executive Director


Patrick Lowrance

Senior Scientist


Luisa Rebull

Senior Research Scientist