M33 Star Formation Regions (Jerry Yesavage)

M33 Star Formation Regions

Inspired by a recent image to use GHS to highlight these star formation regions.

From Wikipedia:

In the central region of this galaxy, atomic gas is being efficiently converted to molecular gas, resulting in a strong spectral emission of CO. This effect occurs as giant molecular clouds condense out of the surrounding interstellar medium. A similar process is taking place outside the central 4?, but at a less efficient pace. About 10% of the gas content in this galaxy is in the molecular form.

Star formation is taking place at a rate that is strongly correlated with local gas density, and the rate per unit area is higher than in the neighboring Andromeda Galaxy. (The rate of star formation is about 3.4 Gyr?1 pc?2 in the Triangulum Galaxy, compared to 0.74 in Andromeda.) The total integrated rate of star formation in the Triangulum Galaxy is about 0.45 ± 0.1 solar masses per year. It is uncertain whether this net rate is currently decreasing or remaining constant.

Based on analysis of the chemical composition of this galaxy, it appears to be divided into two distinct components with differing histories. The inner disk within a radius of 30×103 ly (9 kpc) has a typical composition gradient that decreases linearly from the core. Beyond this radius, out to about 82×103 ly (25 kpc), the gradient is much flatter. This suggests a different star formation history between the inner disk and the outer disk and halo, and may be explained by a scenario of "inside-out" galaxy formation. This occurs when gas is accumulated at large radii later in a galaxy's life space, while the gas at the core becomes exhausted. The result is a decrease in the average age of stars with increasing radius from the galaxy core.

Final
Original
B

B

Title: H-Alpha and O-III regions

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	6597189
PixInsight job	6ZWRFF0USNN8JK63CGXCB8SILM68CXM8
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	01h33m55s.923
RA (top/left)	01h29m02s.966
RA (top/right)	01h38m45s.829
RA (bottom/right)	01h38m52s.976
RA (bottom/left)	01h29m02s.694

Dec (center)	+30°38′50″.88
Dec (top/left)	+29°58′00″.51
Dec (top/right)	+29°56′54″.91
Dec (bottom/right)	+31°18′56″.91
Dec (bottom/left)	+31°20′15″.27

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