Past Events

Feb 05, 2016 12:30 pm - Renae Wall
Dec 04, 2015 12:30 pm - Tim Miller
Nov 20, 2015 12:30 pm - Paul Canton
Nov 13, 2015 12:30 pm - Saloni Bhatiani

Identifying the properties of red sequence galaxies through studies of their color magnitude relation

Nov 06, 2015 12:30 pm - Lisa Simpson, Mi Dai
Oct 30, 2015 12:30 pm - Eduardo Guerras

Microlensing in the Extragalactic Domain. A Single-epoch Approach

Oct 23, 2015 12:30 pm - Kyra Dame, Nate Kaib

 "A Disintegrating Minor Planet Transiting a White Dwarf" and "The Fragility of the Terrestrial Planets during a Giant Planet Instability".

Oct 16, 2015 12:30 pm - Ferah Munshi, Jamie Lomax

"V444 Cygni X-ray and polarimetric variability: Radiative and Coriolis forces shape the wind collision region" and "Ali Baba & The 40 Thieves: An extremely high resolution simulation of dwarf galaxies"

Oct 09, 2015 12:30 pm - OU football game
Oct 02, 2015 12:30 pm - Malia Jenks

The effect of a non degenerate companion on the observation of Type Ia supernova.

Sep 25, 2015 12:30 pm - Shaun Steele

Dark Matter Mass Fraction in Lens Galaxies: New Estimates from Microlensing

Sep 18, 2015 12:30 pm - Evan Rich

Radio Astronomy & Interferometry Tutorial

Sep 11, 2015 12:30 pm - Rhiannon Griffin

SDSS Confirmations of Galaxy Clusters in the Swift AGN & Cluster Survey:  Griffin et al. 2015 (submitted: http://arxiv.org/abs/1505.03861

Sep 04, 2015 12:30 pm - Bryan Enders (cancelled); John Wisniewski

Characterizing the Rigidly Rotating Magnetosphere Stars HD 345439 and HD 23478

Preprint

May 01, 2015 12:00 pm - Ferah Munshi
Apr 24, 2015 12:00 pm - Erin M Cooper
Apr 17, 2015 12:00 pm - Rhiannon Griffin

 First Signs of Self-interacting Dark Matter?

Galaxy cluster Abell 3827 hosts the stellar remnants of four almost equally bright

elliptical galaxies within a core of radius 10 kpc. Such corrugation of the stellar distribution is very rare, and suggests recent formation by several simultaneous mergers. We

map the distribution of associated dark matter, using new Hubble Space Telescope

imaging andVLT/MUSE integral field spectroscopy of a gravitational lens system

threaded through the cluster core. Analysis of ground-based imaging previously suggested that dark matter associated with one galaxy had become offset by up to 6 kpc

from its stars – perhaps lagging behind during its long infall because of a drag force

created by dark matter self-interactions. Exploiting our new, high-resolution data,

we find that each of the central galaxies retains an associated massive halo. At least

one of the galaxies is offset from its dark matter. The best-constrained position is

1.62+0.50 −0.47 kpc from the stars, where the 68% confidence limit includes both statistical

error and systematic biases in mass modelling. With such a small physical offset, it is

difficult to definitively rule out astrophysical effects operating (exclusively) in dense

cluster core environments – but if interpreted solely as evidence for self-interacting

dark matter, this offset implies a cross-section σDM/m ∼(1.7 ± 0.7)×10−4

cm2/g.

Apr 10, 2015 12:00 pm - Canceled
Apr 03, 2015 12:00 pm - Jenna Nugent

"Giant disc galaxies: where environment trumps mass in galaxy evolution"

http://arxiv.org/abs/1502.00292

Mar 27, 2015 12:00 pm - Kyra Dame, Mi Dai

Probing Cosmological Isotropy With Type IA Supernovae

http://arxiv.org/abs/1503.01413

The incidence of magnetic fields in cool DZ white dwarfs

http://arxiv.org/pdf/1503.03866.pdf

 

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Events

Upcoming...

Astronomy Journal Club

Sep 22, 2017 12:30 pm

Nielsen Hall 302 - Nickalas Reynolds and Malia Jenks

Faculty Research Seminar

Sep 27, 2017 6:00 pm

Nielsen Hall 303 - Profs. Baer, Kao, & Sinha

CMP Journal Club

Sep 28, 2017 1:30 pm

Nielsen Hall 103 - Tim Burt

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