CED 111 Chameleon I Cloud Complex (Alex Woronow)

CED 111 Chameleon I Cloud Complex

CED 111 Chameleon I Cloud Complex

OTA: TAO 150 (f/7.3)

Camera: FLI - ML16200 (1.13 arcseconds/pixel)

Observatory: Deep Sky West, Chile

EXPOSURES:

Red: 16 x 600 sec.

Blue: 17 x 600

Green: 17 x 600

L: 20 x 600

Total exposure ~11.3 hours

Image Width: ~1 deg

Processed by Alex Woronow (2020) using PixInsight, Skylum, Topaz, SWT

CED 111, Chameleon I Cloud, lies at -77 deg declination, a distance of only 500 ly, and far enough above the galactic plane such that foreground stars are scarce. This positions it well for identifying and characterizing faint young stars-and young stars abound. The overlay locates abundant YSOs (Young Stellar Objects), HH (Herbig-Haro Objects), TTau (T-Tauri ) pre-main sequence stars, IR stars, and proto-stars. Infrared observations detect most of the latter three objects, which range from accreting and compressionally heated gas/dust balls still embedded in their parent cloud to very recently ignited stars. At the tip of the red-orange streak at about (11h 9m , -77d 44m) are two T-Tauri stars, and a reasonable interpretation is that the streak itself is a flare of heated gases driven by the recent ignition.

Unlike many other star nurseries (e.g., M 78, IC 2944, NGC 1769, NGC 6334,....), which boast giant O and B stars in their stellar nurseries, CED 111’s new stars, predominantly, are low mass . Not unreasonably, different star-formational processes could account for this difference. The new stars forming in CED 111 largely arise from gravitation, cold accretion from a relatively low-density cloud, as opposed to the violence-driven accretion in the OB nurseries where shock-waves from mechanisms like cloud-cloud collisions, and the ignition of the giant stars themselves, create high-density knots in the nebula that perpetuate star-burst activity.

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Objects of the South - negative declination only
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Status	Advanced success
Started	...
Astrometry.net job	3563344
PixInsight job	DV8PXND6NQAOB3C4TA41BW1SBBBR37VX
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	11h05m32s.98
RA (top/left)	11h14m56s.96
RA (top/right)	10h57m53s.97
RA (bottom/right)	10h55m29s.34
RA (bottom/left)	11h13m51s.37

Dec (center)	-77°34′59″.3
Dec (top/left)	-77°08′38″.2
Dec (top/right)	-77°03′12″.9
Dec (bottom/right)	-78°00′04″.2
Dec (bottom/left)	-78°05′54″.2

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CED 111 Chameleon I Cloud Complex

CED 111 Chameleon I Cloud Complex

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CED 111 Chameleon I Cloud Complex

CED 111 Chameleon I Cloud Complex

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