Dissecting star formation in N159
We propose to investigate star formation as a function of time, space, and mass in the Large Magellanic Cloud star formation region N159. We will combine HST photometry in V, I, J, H, and Halpha equivalent filters with our already scheduled Atacama Large (sub) Millimeter Array (ALMA; PI Fukui) and our existing Australia Telescope Compact Array (ATCA; PI Seale and PI Chen) observations. These datasets will allow us for the first time to completely characterize protostars, HII regions, and molecular gas in this reduced-metallicity region. The region is a remarkable laboratory, containing at once a spontaneously cluster-forming giant molecular cloud (GMC), an arguably triggered star-forming GMC, and a more quiescent GMC.
We will use color-magnitude diagram (CMD) and spectral energy distribution (SED) modeling to separate redenning, circumstellar dust emission, and pre-main-sequence spectral type for each star, mapping not only current star formation activity but its history (over the last 50Myr using pre-main-sequence stars, and over a Hubble time using classical CMD fitting). We will use Halpha excess to further characterize the HII regions and all currently accreting protostars with ages up to 50 Myr. We will resolve many limitations of previous Spitzer-based star formation studies, and search for variations in the stellar initial mass function. We will test whether there is a gas density threshold for star formation, and investigate the extent to which environment and feedback also play a role in how galaxies evolve by turning gas into stars.
goals: same observing time on all 4 targets N159 E,W,S and OFF.
~1 full orbit of F656N, F814W, F555W,
~0.5 orbit of each of F160W, F125W.
organized with dithering and the shortest possible IR exposures to reduce persistence.
RESOLVED STAR FORMATION
Default
false
false
false
false
false
SUPPORTED
EXT-MEDIUM
MOLECULAR CLOUD
STAR FORMING REGION
J2000
J2000
EXT-MEDIUM
MOLECULAR CLOUD
STAR FORMING REGION
J2000
J2000
EXT-MEDIUM
MOLECULAR CLOUD
STAR FORMING REGION
J2000
J2000
EXT-CLUSTER
YOUNG ASSOCIATION
J2000
J2000
WFC3/UVIS
Imaging
No
No
F656N
WFC3/UVIS
Imaging
No
No
F656N
WFC3/UVIS
Imaging
No
No
F656N
WFC3/UVIS
Imaging
No
No
F656N
WFC3/IR
Imaging
No
No
F125W
WFC3/IR
Imaging
No
No
F160W
WFC3/IR
Imaging
No
No
F125W
WFC3/IR
Imaging
No
No
F160W
WFC3/IR
Imaging
No
No
F125W
WFC3/IR
Imaging
No
No
F160W
WFC3/IR
Imaging
No
No
F125W
WFC3/IR
Imaging
No
No
F160W
ACS/WFC
Imaging
No
No
F555W
ACS/WFC
Imaging
No
No
F555W
ACS/WFC
Imaging
No
No
F555W
ACS/WFC
Imaging
No
No
F555W
ACS/WFC
Imaging
No
No
F814W
ACS/WFC
Imaging
No
No
F814W
ACS/WFC
Imaging
No
No
F814W
ACS/WFC
Imaging
No
No
F814W
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