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Galaxies SIG Seminar

Galaxies Science Interest Group

DATE

Nov 07, 2023

TIME

1:00pm

COMMUNITY

Galaxies SIG

TYPE

Seminar

Near, far, wherever you are: Connecting local and high-z dwarf galaxy populations with HWO

Mia de los Reyes (Amherst College)

Although we are entering a new era of high-redshift science, we still don’t fully understand the systematic effects that impact our observations of high-redshift galaxies. At the same time, although we have begun mapping our own galaxy and its closest satellites in unprecedented detail, this level of detail has largely been limited to our Milky Way’s immediate surroundings. The Habitable Worlds Observatory (HWO) provides an incredible opportunity to connect these two disparate regimes using low-mass dwarf galaxies. Not only will HWO be able to identify some of the least massive galaxies in the early universe (including the progenitors of today’s Milky Way galaxies), it will also be able to observe dwarf galaxies as resolved stellar systems out to previously inaccessible distances, allowing us to bridge the gap between the different techniques used to measure galaxy properties. In this talk, I will discuss ongoing work towards this goal, and what this could mean for HWO.

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An illustration of Sun-like star HD 181327 and its surrounding debris disk. The star is at top right. It is surrounded by a far larger debris disk that forms an incomplete ellpitical path and is cut off at right. There’s a huge cavity between the star and the disk. The debris disk is shown in shades of light gray. Toward the top and left, there are finer, more discrete points in a range of sizes. The disk appears hazier and smokier at the bottom. The star is bright white at center, with a hazy blue region around it. The background of space is black. The label Artist's Concept appears at lower left.