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DD
Dr. Deep Anand
@styrofoamplates.bsky.social
Senior Staff Scientist working on Hubble. views are my own.
200 followers133 following52 posts
DDstyrofoamplates.bsky.social

the extended spatial coverage of NIRCam allows us to obtain imaging that is well suited for both TRGB and SBF measurements, in the same pointing.

F090W/F150W/F356W color image of the core and halo of Messier 89. The extended spatial coverage of NIRCam allows us to obtain imaging that covers a very large dynamic range of surface brightness, facilitating both SBF and TRGB measurements. A few pixels in the core of the galaxy were saturated and were manually fixed to create the color image.
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DDstyrofoamplates.bsky.social

JWST is an absolute powerhouse. our color-magnitude diagrams are some of the deepest ever for galaxies within Virgo. these CMDs allow us to measure very precise TRGB distances.

Figure 5. Color magnitude diagrams for each of the ten galaxies presented in this paper. The CMDs for each of the two chips are combined and displayed for each target, and the total number of stars is displayed in the top left. Only stars between 0.50 ≤ F090W − F150W ≤ 1.75 mag were used for the determination of the TRGB, due to the downward sloping of the TRGB at high metallicities, and hence colors (Anand et al. 2024a).
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DD
Dr. Deep Anand
@styrofoamplates.bsky.social
Senior Staff Scientist working on Hubble. views are my own.
200 followers133 following52 posts
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