The Accelerating Universe: Lambda, W, and Beyond
Event Date:
2019-10-31T14:00:00
2019-10-31T15:00:00
Event Location:
TRIUMF Auditorium
Speaker:
Levon Pogosian (SFU)
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Event Information:
While cosmic acceleration is well-established, the nature of Dark Energy causing it remains unknown. A flat universe dominated by a cosmological constant (Lambda) and cold dark matter (CDM) has been cosmologists' working model of choice for nearly two decades. However, the value of Lambda poses a serious theoretical challenge, exposing a gap in our understanding of the vacuum energy and the way it gravitates. Intriguingly, there appear to be tensions between different datasets within the LCDM framework that would be relieved if Dark Energy density was non-constant. I will discuss the evidence for this, as well as some of the alternatives to Lambda and ways of testing them with future data.
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2019-10-31T14:00:00
2019-10-31T15:00:00
The Accelerating Universe: Lambda, W, and Beyond
Event Information:
While cosmic acceleration is well-established, the nature of Dark Energy causing it remains unknown. A flat universe dominated by a cosmological constant (Lambda) and cold dark matter (CDM) has been cosmologists' working model of choice for nearly two decades. However, the value of Lambda poses a serious theoretical challenge, exposing a gap in our understanding of the vacuum energy and the way it gravitates. Intriguingly, there appear to be tensions between different datasets within the LCDM framework that would be relieved if Dark Energy density was non-constant. I will discuss the evidence for this, as well as some of the alternatives to Lambda and ways of testing them with future data.
Event Location:
TRIUMF Auditorium