Publications (16)
NGC7538 IRS1 - an ionized jet powered by accretion
G. Sandell, W. M. Goss, M. Wright +1
Analysis of high spatial resolution VLA images shows that the free-free emission from NGC7538 IRS1 is dominated by a collimated ionized wind. We have re-analyzed high angular resol…
A gap in the planetesimal disc around HD 107146 and asymmetric warm dust emission revealed by ALMA
S. Marino, J. Carpenter, M. C. Wyatt +9
While detecting low mass exoplanets at tens of au is beyond current instrumentation, debris discs provide a unique opportunity to study the outer regions of planetary systems. Here…
Unveiling the gas and dust disk structure in HD 163296 using ALMA observations
I. de Gregorio-Monsalvo, F. Ménard, W. Dent +20
Aims: The aim of this work is to study the structure of the protoplanetary disk surrounding the Herbig Ae star HD 163296. Methods: We have used high-resolution and high-sensitivity…
uvbyCa H beta CCD Photometry of Clusters. VII. The Intermediate-Age Anticenter Cluster Melotte 71
B. A. Twarog, S. Corder, B. J. Anthony-Twarog
CCD photometry on the intermediate-band uvbyCa H beta system is presented for the anticenter, intermediate-age open cluster, Melotte 71. Restricting the data to probable single mem…
The Circumstellar Disk and Asymmetric outflow of the EX Lup Outburst System
A. S. Hales, S. Peréz, M. Saito +8
We present Atacama Large Millimeter/submillimeter Array (ALMA) observations at 0.3 arcsec-resolution of EX Lup, the prototype of the EXor class of outbursting pre-main sequence sta…
Molecular Gas Clumps from the Destruction of Icy Bodies in the Pictoris Debris Disk
W. R. F. Dent, M. C. Wyatt, A. Roberge +11
Many stars are surrounded by disks of dusty debris formed in the collisions of asteroids, comets and dwarf planets. But is gas also released in such events? Observations at submm w…
Long-wavelength observations of debris discs around sun-like stars
V. Roccatagliata, Th. Henning, S. Wolf +5
[Abridged] We present two deep surveys of circumstellar discs around solar-type stars at different ages carried out at 350 micron with the CSO and at 1.2 mm with the IRAM 30-m tele…
Dust properties across the CO snowline in the HD 163296 disk from ALMA and VLA observations
G. Guidi, M. Tazzari, L. Testi +22
To characterize the mechanisms of planet formation it is crucial to investigate the properties and evolution of protoplanetary disks around young stars, where the initial condition…
1.3 mm ALMA Observations of the Fomalhaut Debris System
J. A. White, A. C. Boley, W. R. F. Dent +2
We present ALMA Band 6 observations (1.3 mm/233 GHz) of Fomalhaut and its debris disc. The observations achieve a sensitivity of 17 Jy and a resolution of 0.28 arcsec (2.1 au a…
First Results from High Angular Resolution ALMA Observations Toward the HL Tau Region
ALMA Partnership, C. L. Brogan, L. M. Perez +82
We present Atacama Large Millimeter/submillimeter Array (ALMA) observations from the 2014 Long Baseline Campaign in dust continuum and spectral line emission from the HL Tau region…
Disk and Envelope Structure in Class 0 Protostars: II. High Resolution Millimeter Mapping of the Serpens Sample
M. L. Enoch, S. Corder, G. Duchene +13
We present high-resolution CARMA 230 GHz continuum imaging of nine deeply embedded protostars in the Serpens Molecular Cloud, including six of the nine known Class 0 protostars in…
How ALMA is calibrated: I Antenna-based pointing, focus and amplitude calibration
T. van Kempen, S. Corder, R. Lucas +1
Here we will discuss which calibrations are needed, how to perform them and how the calibration affect ALMA observations. This first part concentrates on aspects related to a singl…
An Overview of the 2014 ALMA Long Baseline Campaign
ALMA Partnership, E. B. Fomalont, C. Vlahakis +246
A major goal of the Atacama Large Millimeter/submillimeter Array (ALMA) is to make accurate images with resolutions of tens of milliarcseconds, which at submillimeter (submm) wavel…
ALMA Observations of HD141569's Circumstellar Disk
J. A. White, A. C. Boley, A. M. Hughes +5
We present ALMA band 7 (345 GHz) continuum and CO(J = 3-2) observations of the circumstellar disk surrounding HD141569. At an age of about 5 Myr, the disk has a complex morp…
ALMA observations of the debris disk around the young Solar Analog HD 107146
L. Ricci, J. M. Carpenter, B. Fu +3
We present ALMA continuum observations at a wavelength of 1.25 mm of the debris disk surrounding the 100 Myr old solar analog HD 107146. The continuum emission extends from…
NGC7538 IRS1 -- an O star driving an ionized jet and giant N-S outflow
G. Sandell, M. Wright, R. Güsten +4
NGC 7538 IRS 1 is a very young embedded O star driving an ionized jet and accreting mass with an accretion rate > 10^-4 Msun/year, which is quenching the hypercompact HII region. W…