Events
IPAC organizes and hosts a number of meetings and conferences.
IPAC hosts seminars every Wednesday from 12-1pm in IPAC's Large Conference Room (102) except where noted. Directions can be found on the visitor information page. Pizza and soda are available for purchase at a modest fee. Some weeks, the Time Domain Forum talk (which is not a lunch talk) is held on Thursday afternoons at 2:30 pm.
To receive seminar notification emails, you may sign up here. If you are interested in presenting a talk or seminar, please contact Peter Capak (Extragalactic), or Stephen Kane (Galactic/Solar System/Exoplanets). To present at the Time Domain Forum, contact Luisa Rebull.
Here is a partial list of astronomy-related talks in Pasadena:
- Caltech Astronomy Tea Talk (Mondays, 4pm)
- Caltech DPS Division Seminar (Mondays, 4pm)
- IR/sub-mm/mm Sack lunch series (Tuesdays, 12:15pm)
- Carnegie Colloquia series (Tuesdays, 4pm)
- Caltech Astronomy Colloquia (Wednesdays, 4pm)
- Caltech Physics Research Conference (Thursdays, 4pm)
- Carnegie Lunch Talk Series (Fridays, 12:15pm)
Special Note: For more astronomy related talks around Pasadena, check the following list maintained by IPAC scientist Solange Ramirez.
Wednesday, June 27, 2012
I present and discuss very high angular resolution (~0.08") 2D measurements of gas flows in the nuclear environment of nearby AGN using AO-assisted integral field spectroscopy at Keck and the VLT. The spatially resolved kinematics of the ionized gas can be modeled as a combination of an outflow bicone and a rotating disk coincident with the galaxy disk. High-ionization emission is seen in both components, suggesting it is leaking out of a clumpy torus. The mass outflow rates are 2–3 orders of magnitude greater than the accretion rates, implying that the outflow is mass loaded by the surrounding interstellar medium (ISM). Inflows of molecular gas are found in approximately half of the sources, where they occur mostly in nuclear spiral structures or nuclear bars with mass inflow rates of ~1-10 M_sun yr-1. This is of the order of the outflow rates, suggesting that most mass which flows towards the nucleus to feed the supermassive black hole is expelled by the AGN. In half of the AGN measured so far, the kinetic energy of the outflows appears sufficient to provide the eagerly-sought ''AGN feedback'' invoked to explain fundamental galaxy properties such as the M–sigma relation.
