Star
Formation in the Isolated Molecular Cloud NGC 1788 (LDN
1616/1615)
Supplementary Figures and
Information
Figure 5:
Orion Molecular Cloud Complex
NGC1788/L1616 is isolated cloud
number 13 at about (5h6m, -3°30′), marked
with the red arrow. The caption reads: "Schematic diagram of
the molecular clouds: the lowest contour from Fig. 2. Dots with
numbers corresponding to those in Table 1, indicate locations of CO
emission peaks. Some NGC numbers indicate the optical prominent
objects coincident with CO peaks. The extent of UV emission from
Banard's loop is indicated by the shaded arc (from O'Dell, York, and
Henize 1967; Isobe 1973). The dashed line roughly indicates the extent
of the lamda Ori ring of clouds." (Maddalena, Ronald J., Morris,
Mark, Moscowitz, J., and Thaddeus, P. "The Large System of Molecular
Clouds in Orion and Monoceros." ApJ 303:375-391. 1996 Apr. 1. p379)
Figure 6: Orion Cometary Cloud Complex
NGC1788/L1616 is cloud number 3 at about (5h5m,
-3°30′), again marked with a red arrow. The image shows how most
nebulae seem to be being blown away from Alpha Orionis. Ramesh
believes Epsilon Orionis is the star inducing the star formation.
The caption for this image reads: "Surface distribution of
objects in Table 1. Ticks indicate the directions of their tails" [3].
This is focus of the
most plausible T-Tauri Stars out of the previous spectra. The vertical
red line approximates the Li λ6708 absorption line. Lithium
only appears in young stellar objects because as the star develops,
the lithium gets convected into the star and burnt up so it is no
longer visible.
