SMA Community Day


Monday, July 11, 2011

9:00 - 9:20 Coffee

9:20 - 10:30 SMA Science
10:30 - 11:00 Coffee

11:00 - 12:30 SMA Science

12:30 - 12:45 Set-up for Lunch

12:45 - 1:20 During Lunch

1:20 - 1:35 Break

1:35 - 2:30 SMA Operations


Josep Girart (CfA)

Title: Magnetic Field Mapping

Presentation in pdf format available here.

Lisa H. Wei (CfA)

Title: Probing Nearby Starburst Galaxies with the SMA

Abstract: The process of star formation and feedback is intricately tied to the
evolution of galaxies at high as well as low redshifts, and is directly related to
the presence/absence of gas in these galaxies. As observations of high-redshift
starbursts become more and more common, detailed studies of local starburst
galaxies is essential for the understanding and interpretation of these observations.
I will discuss recent high-resolution SMA observations of three nearby starburst
galaxies: NGC 253, the Antennae, and NGC 3256 and what they teach us about the
density, temperature, as well as kinematics of molecular gas in starburst environments.

Presentation in pdf format available here.

Shane Bussmann (CfA)

Title: High Resolution SMA Imaging of Gravitationally Lensed ULIRGs at z>2 Discovered by Herschel

Abstract: In the past year, wide-field surveys conducted by the Herschel Space Observatory have
discovered an exciting population of ultra-luminous infrared galaxies (ULIRGs) at z>2 that are
gravitationally lensed by an intervening galaxy or group of galaxies along the line of sight. A
large program with the SMA is underway to obtain high spatial resolution imaging of a sample
of ~20 of these objects. The SMA data are critical to constraining both the mass of the lensing
system as well as the magnification factor of the background source. I will describe the progress
made so far in measuring both these quantities and highlight some interesting paths of study of
these systems for the near future.

Presentation in pdf format available here.

Ken Young (CfA)

Title: Galactic Dust Bunnies: SMA Observations of Evolved Stars

Abstract: The recent doubling of the SMA correlator's single receiver mode
bandwidth allows line surveys of evolved stars in the 345 GHz atmospheric
window to be completed in nine tracks. Three such surveys have been
completed in the last few years, and now followup studies are being done to
investigate interesting features found in these surveys. In addition, the
kinematics of the inner regions of several AGB stars and young planetary
nebulae have been studied.

Presentation in pdf format available here.

Arielle Moullet (CfA)

Title: Mapping planetary atmospheres : spatial distribution, temperature and winds

Abstract: Thanks to its high spatial resolution at submm frequencies, the SMA
can be used to map rotational lines of molecules present in the atmospheres
of the Solar System bodies (CO, HCN, SO2, ...). Several observations were
performed on sources as different as giant gaseous planets (Jupiter, Neptune),
terrestrial planets (Venus, Mars), and moons (Io and Titan). The analysis of these
datasets allows to characterize the spatial distribution of the different species at
stratospheric or mesospheric altitudes, the atmospheric temperature and the wind
field. These results bring new clues towards the understanding of the chemical
and dynamic processes in planetary atmospheres.

Presentation in pdf format available here.

Ashley Zauderer (CfA)

Title: SMA Observations of Gamma-Ray Bursts

Abstract: Gamma-ray bursts (GRBs) are among the most energetic phenomena
in the universe, emitting equivalent energy within seconds to the energy production
of hundreds of sun-like stars over the course of a billion years. Studying the afterglow
emission of GRBs in the radio and sub-millimeter allows determination of associated
physical properties of the produced relativistic jet, including its geometry, energy and
properties of the surrounding medium. Our team is targeting gamma-ray burst triggers
from the Swift satellite within days of the initial burst. In this talk, we will discuss the
information that can only be gleaned from the millimeter and sub-mm and conclude
with the surprising discovery of a gamma-ray trigger that was caused by the tidal
disruption of a star near a million solar mass black hole and the SMA's unique
contribution to this event.

Presentation in pdf format available here.

Eric Keto (CfA)

Title: One Possible Future for the SMA

Abstract: The new ALMA observatory covers the same wavelengths as our SMA, but has
a much larger collecting area. The difference in sensitivity between the SMA and ALMA
will make it difficult for the SMA to collaborate and contribute. If we can improve the
sensitivity of the SMA by expanding the bandwidth with new electronics and increase the
field of view with focal-plane arrays, the new SMA will be as fast as ALMA in wide bandwidth,
wide-area mapping. Taking advantage of this new capability will require developing new
scientific capabilities in interpreting molecular lines in a spectrum covering 72 GHz.

Presentation in pdf format available here.

Eric Keto (CfA)

Title: The SMA Data Archive

Abstract: Many interesting astronomical sources have been observed by the SMA, and
the data is publicly available after a proprietary period of 15 months. In the past, a
significant challenge to widespread use of data from a radio interferometer such as the
SMA has been the difficulty of converting the raw data into scientifically useful images.
This process requires specialized software and the ability to run it. The SMA is the first
radio interferometer to make its data archive available as images that can be read by
standard imaging and analysis software such as DS-9. These images can be used
directly in scientific research or simply to provide a quick assessment of the quality and
character of an observation. SMA data is available in 3 formats: raw, calibrated, and
imaged, all available from our website.

Presentation in pdf format available here.

Mark Gurwell (CfA)

Title: Using the SMA

Presentation in pdf format available here.