Three-color composite images showing the environment of sources YSO-1 and YSO-2 in the N 113 massive star formation region based on the Spitzer and Herschel observations. The left-hand image combines IRAC and MIPS, showing emission from MIPS 24 m, IRAC 8.0 m, and IRAC 4.5 m (red, green, and blue, respectively). The image at the right combines SPIRE 250 m (red), PACS 160 m (green), and MIPS 24 m (blue) images. All images are scaled logarithmically. The linear distance scale is shown for the LMC distance of 50 kpc (Schaefer 2008). Several categories of confirmed YSOs (see text for explanation and references) are marked as indicated in the legend. The OH and H₂O masers marked by a single cross () symbol coincide in position within the uncertainties. Sources YSO-1 and YSO-2 are discussed in Sects. 4 and 5. Maser positions are from Green et al. (2008) and Ellingsen et al. (2010). YSO-1 was identified as a YSO candidate by Gruendl & Chu (2009, 051317.69-692225.0) based on the Spitzer data and confirmed spectroscopically by Seale et al. (2009), although no ice features were detected. YSO-2 is a new Herschel YSO candidate.

Three-color composite images showing the environment of YSO-3 in the LMC N 105 massive star formation region based on the Spitzer and Herschel observations. Coloring and scaling are the same as in Fig. 3. YSO-3 was identified as a YSO candidate by Gruendl & Chu (2009, 050958.52-685435.5) based on the Spitzer data. This source is associated with 6.7 GHz and 12.2 GHz methanol masers (Ellingsen et al. 2010; Sinclair et al. 1992).

Three-color composite images showing the environment of YSO-4 based on the Spitzer and Herschel observations. Coloring and scaling are the same as in Fig. 3. YSO-4 is located at the edge of an evacuated supershell in the LMC bar, between N 105 and N 113. It does not appear as a resolved source in 2MASS imaging and is faint in IRAC bands, excluding it from Spitzer YSO lists requiring shorter wavelengths. The SED of this evident Herschel source is quite steep from 24 m to Herschel wavelengths (Fig. 6), a trend we note in 20% of the newly-identified Herschel YSO candidates.