Facebook Twitter Instagram YouTube

The Laniakea Supercluster of Galaxies

Event Details

Event Dates: 

Monday, April 6, 2015 - 4:00pm

Seminar Location: 

  • JILA Auditorium

Speaker Name(s): 

Brent Tully

Speaker Affiliation(s): 

University of Hawaii
Seminar Type/Subject

Scientific Seminar Type: 

  • Astrophysical & Planetary Sciences Colloquia

Event Details & Abstract: 

Cosmicflows-2 provides distances for over 8000 galaxies giving the most extensive all-sky sample of peculiar velocities available. A detailed description of local structure is developed from a Wiener Filter reconstruction of velocities and densities. We are embedded in a basin of attraction at rest with respect to the CMB that extends beyond our data zone of 200 Mpc. This talk focuses on only a part of this as yet poorly defined entity. We live in a local basin of attraction with characteristic dimensions of 80 Mpc. In this region, flows converge toward a location in the zone of obscuration near the Norma Cluster. This entire region is displacing toward the Shapley Concentration. The local basin of attraction, though not a true potential minimum, is of interest as the largest inward gathering of flows bounded by current peculiar velocity measurements. We call this local basin of attraction the Laniakea Supercluster.

JILA follows the six University nodes' policies for ensuring harassment-free environments. For more detailed information regarding the University of Colorado policies, please read the Discrimination and Harassment Policy and Procedures.