Calendar

Aug
30
Fri
Colloquium: Lisa Young (Host: Rene Walterbos)
Aug 30 @ 3:15 pm – 4:15 pm
Colloquium: Lisa Young (Host: Rene Walterbos) @ BX102

Cold Gas and the Evolution of Early-type Galaxies

Lisa Young, New Mexico Tech

A major theme of galaxy evolution is understanding how today’s Hubble sequence was
established — what makes some galaxies red spheroidals and others blue disks, and what
drives their relative numbers and their spatial distributions. One way of addressing these
questions is that galaxies themselves hold clues to their formation in their internal
structures. Recent observations of early-type galaxies in particular (ellipticals and
lenticulars) have shown that their seemingly placid, nearly featureless optical images can
be deceptive. Kinematic data show that the early-type galaxies have a wide variety of
internal kinematic structures that are the relics of dramatic merging and accretion
events. A surprising number of the early-type galaxies also contain cold atomic and
molecular gas, which is significant because their transitions to the red sequence must
involve removing most of their cold gas (the raw material for star formation). We can now
also read clues to the evolution of early-type galaxies in the kinematics and the
metallicity of their gas, and possibly also in the rare isotope abundance patterns in the
cold gas. Numerical simulations are beginning to work on reproducing these cold gas
properties, so that we can place the early-type galaxies into their broader context.

(incomplete video)

Jan
30
Thu
Solar-Stellar Group meeting
Jan 30 @ 3:00 pm – 4:00 pm
Feb
6
Thu
Solar-Stellar Group meeting
Feb 6 @ 3:00 pm – 4:00 pm
Feb
13
Thu
Solar-Stellar Group meeting
Feb 13 @ 3:00 pm – 4:00 pm
Feb
20
Thu
Solar-Stellar Group meeting
Feb 20 @ 3:00 pm – 4:00 pm
Feb
27
Thu
Solar-Stellar Group meeting
Feb 27 @ 3:00 pm – 4:00 pm
Mar
5
Thu
Solar-Stellar Group meeting
Mar 5 @ 3:00 pm – 4:00 pm
Mar
12
Thu
Solar-Stellar Group meeting
Mar 12 @ 3:00 pm – 4:00 pm
Mar
19
Thu
Solar-Stellar Group meeting
Mar 19 @ 3:00 pm – 4:00 pm
Mar
26
Thu
Solar-Stellar Group meeting
Mar 26 @ 3:00 pm – 4:00 pm