Calendar

Nov
9
Thu
Public Talk: “Preparing to Explore the Universe with the James Webb Space Telescope” – Dr. Jane Rigby (NASA Goddard)
Nov 9 @ 7:00 pm – 8:00 pm
Public Talk: "Preparing to Explore the Universe with the James Webb Space Telescope" - Dr. Jane Rigby (NASA Goddard) @ Gerald Thomas Hall, Room 194

Preparing to Explore the Universe with the James Webb Space Telescope

Dr. Jane Rigby (NASA Goddard, Deputy Project Scientist for JWST)

Abstract: NASA’s James Webb Space Telescope (JWST), scheduled to be launched in 2019, will revolutionize our view of the Universe.  As the scientific successor to the Hubble Space Telescope, JWST will rewrite the textbooks and return gorgeous images and spectra of our universe.   In my talk, I will show how JWST will revolutionize our understanding of how galaxies and supermassive black holes formed in the first billion years after the Big Bang, and how they evolved over cosmic time.  I’ll describe how our international team is preparing for launch, how we decide what targets to observe, and how we are testing the telescope to be sure it will work in space.

More information about the telescope can be found at https://www.jwst.nasa.gov/.

 

 

Sep
6
Fri
Colloquium: Brian Svoboda (Host: Moire Prescott)
Sep 6 @ 3:15 pm – 4:15 pm
Colloquium: Brian Svoboda (Host: Moire Prescott) @ BX102

Starless clumps and the earliest phases of high-mass star formation in the Milky Way

Brian Svoboda, NRAO Jansky Fellow

High-mass stars are key to regulating the interstellar medium, star formation activity, and overall evolution of galaxies, but their formation remains an open problem in astrophysics. In order to understand the physical conditions during the earliest phases of high-mass star formation, I will present observational studies we have carried out on dense starless clump candidates (SCCs) that show no signatures of star formation activity. We identify 2223 SCCs from the 1.1 mm Bolocam Galactic Plane Survey, systematically analyse their physical properties, and show that the starless phase is not represented by a single timescale, but evolves more rapidly with increasing clump mass. To investigate the sub-structure in SCCs at high spatial resolution, we investigate the 12 most high-mass SCCs within 5 kpc using ALMA. We find previously undetected low-luminosity protostars in 11 out of 12 SCCs, fragmentation equal to the thermal Jeans length of the clump, and no starless cores exceeding 30 solar masses. While uncertainties remain concerning the star formation efficiency in this sample, these observational facts are consistent with models where high-mass stars form from initially low- to intermediate-mass protostars that accrete most of their mass from the surrounding clump. I will also present on-going research studying gas inflow signatures with GBT/Argus and ALMA, and the dense core mass function with the JVLA.

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Jan
24
Fri
Colloquium: RESERVED (Host: TBD)
Jan 24 @ 3:15 pm – 4:15 pm
Colloquium: RESERVED (Host: TBD) @ BX102

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Jan
31
Fri
Colloquium: RESERVED (Host: TBD)
Jan 31 @ 3:15 pm – 4:15 pm
Colloquium: RESERVED (Host: TBD) @ BX102

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Feb
7
Fri
Colloquium: RESERVED (Host: TBD)
Feb 7 @ 3:15 pm – 4:15 pm
Colloquium: RESERVED (Host: TBD) @ BX102

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Feb
14
Fri
Colloquium: RESERVED (Host: TBD)
Feb 14 @ 3:15 pm – 4:15 pm
Colloquium: RESERVED (Host: TBD) @ BX102

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Feb
21
Fri
Colloquium: RESERVED (Host: TBD)
Feb 21 @ 3:15 pm – 4:15 pm
Colloquium: RESERVED (Host: TBD) @ BX102

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Feb
28
Fri
Colloquium: RESERVED (Host: TBD)
Feb 28 @ 3:15 pm – 4:15 pm
Colloquium: RESERVED (Host: TBD) @ BX102

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Mar
6
Fri
Colloquium: RESERVED (Host: TBD)
Mar 6 @ 3:15 pm – 4:15 pm
Colloquium: RESERVED (Host: TBD) @ BX102

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Mar
13
Fri
Colloquium: Karen Masters (Host: Karen Kinemuchi)
Mar 13 @ 3:15 pm – 4:15 pm
Colloquium: Karen Masters (Host: Karen Kinemuchi) @ BX102

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Karen Masters, Haverford University

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