We used Spitzer infrared observations to find the young stars of two HII regions in the Large Magellanic Cloud, N63 and N180. The young stellar object (YSO) candidates were identified in each nebula by means of color-color, color-magnitude diagrams, and the shapes of their spectral energy distributions (SEDs). The most luminous YSOs are found near the ionization fronts within strong 8um emission clumps. Most YSOs, less luminous, are seen in projection inside the HII regions. HST images show several Class I stars that have emerged along the borders of the HII regions; other YSOs are embedded in cometary clouds. The most luminous YSO of N63 is connected to a string of pointlike sources. Its SED can be modeled by a central source of stellar mass M_ between 7 and 11M{sun}, with a circumstellar disk of outer radius R_d of ~55AU, and an envelope of moderate accretion rate, M_env_ of ~2x10^-5^M_{sun}/yr. N180 is experiencing a phase of star formation more intense than N63, attested by the properties of its most luminous YSO: M of 25M{sun}, R_d of ~200AU, and M_env_ of ~1.5x10^-3^M_{sun}_/yr. The modes of triggered star formation in N63 and N180 appear similar to those seen in Galactic HII regions.
Cone search capability for table J/ApJ/678/200/table3 (Galaxies and AGB stars)
Cone search capability for table J/ApJ/678/200/YSOs (YSOs properties)
