scholarly journals The Five College Radio Astronomy Observatory CO Mapping Survey of the Taurus Molecular Cloud

2008 ◽  
Vol 177 (1) ◽  
pp. 341-361 ◽  
Author(s):  
Gopal Narayanan ◽  
Mark H. Heyer ◽  
Christopher Brunt ◽  
Paul F. Goldsmith ◽  
Ronald Snell ◽  
...  
Keyword(s):  
Radio Astronomy ◽  
Molecular Cloud ◽  
Astronomy Observatory ◽  
Radio Astronomy Observatory ◽  
College Radio ◽  
Taurus Molecular Cloud

The Five College Radio Astronomy Observatory CO Survey of the Outer Galaxy

1998 ◽  
Vol 115 (2) ◽  
pp. 241-258 ◽  
Author(s):  
Mark H. Heyer ◽  
Christopher Brunt ◽  
Ronald L. Snell ◽  
John E. Howe ◽  
F. Peter Schloerb ◽  
...  
Keyword(s):  
Radio Astronomy ◽  
Astronomy Observatory ◽  
Radio Astronomy Observatory ◽  
College Radio

scholarly journals VLBI Structure of NGC 1275 at 3 Millimeters

1988 ◽  
Vol 129 ◽  
pp. 93-94
Author(s):  
Melvyn Wright
Keyword(s):  
Radio Astronomy ◽  
Model Fitting ◽  
Position Angle ◽  
Emission Region ◽  
Astronomy Observatory ◽  
Owens Valley ◽  
Halo Structure ◽  
Radio Astronomy Observatory ◽  
College Radio ◽  
Ngc 1275

We have made λ 3mm VLBI observations of 3C84 at 6 epochs between 1981 and 1987, using 6m antennas at the Hat Creek Radio Astronomy Observatory (HCRK), 10m antennas at the Owens Valley Radio Observatory (OVRO), the 12m Kitt Peak telescope (KTPK), and the 14m telescope at the Five College Radio Astronomy Observatory (QBBN). Model fitting suggests a core-halo structure, which we associate with the active nucleus of NGC 1275. The unresolved core, which is smaller than 0.1 pc (0.2 mas; z=0.018; H =50 km s−1 Mpc−1) shows a slow decay corresponding to the decrease in total flux density since the flare in 1980. In 1985 we resolved the core component on a transcontinental baseline (109λ) into a compact nucleus, < 0.1 mas, and a “jet” extended at a position angle 205° and unresolved in width, < 0.1 mas. There is also evidence for a compact emission region located 10 mas from the nucleus at a position angle 170°. This structure corresponds closely with that observed at the same epoch in VLBI maps at 22 GHz.

The Boston University–Five College Radio Astronomy Observatory Galactic Ring Survey

2006 ◽  
Vol 163 (1) ◽  
pp. 145-159 ◽  
Author(s):  
J. M. Jackson ◽  
J. M. Rathborne ◽  
R. Y. Shah ◽  
R. Simon ◽  
T. M. Bania ◽  
...  
Keyword(s):  
Radio Astronomy ◽  
Astronomy Observatory ◽  
Radio Astronomy Observatory ◽  
Boston University ◽  
College Radio

scholarly journals Spectra of nearby galaxies measured with a new very broadband receiver

2008 ◽  
Vol 4 (S251) ◽  
pp. 251-256
Author(s):  
Gopal Narayanan ◽  
Ronald L. Snell ◽  
Neal R. Erickson ◽  
Aeree Chung ◽  
Mark H. Heyer ◽  
...  
Keyword(s):  
Radio Astronomy ◽  
Astronomy Observatory ◽  
Radio Astronomy Observatory ◽  
Millimeter Wavelength ◽  
College Radio ◽  
Nearby Galaxies

AbstractThree-millimeter-wavelength spectra of a number of nearby galaxies have been obtained at the Five College Radio Astronomy Observatory (FCRAO) using a new, very broadband receiver. This instrument, which we call the Redshift Search Receiver, has an instantaneous bandwidth of 36 GHz and operates from 74 to 110.5 GHz. The receiver has been built at UMass/FCRAO to be part of the initial instrumentation for the Large Millimeter Telescope (LMT) and is intended primarily for determination of the redshift of distant, dust-obscured galaxies. It is being tested on the FCRAO 14 m by measuring the 3 mm spectra of a number of nearby galaxies. There are interesting differences in the chemistry of these galaxies.

scholarly journals Design, environmental and sustainability constraints of new African observatories: The example of the Mozambique Radio Astronomy Observatory

2013 Africon ◽  
2013 ◽  
Author(s):  
Domingos Barbosa ◽  
Miguel Bergano ◽  
Valerio A. R. M. Ribeiro ◽  
Anita Loots ◽  
Venkatasubramani L. Thondikulam ◽  
...  
Keyword(s):  
Radio Astronomy ◽  
Astronomy Observatory ◽  
Radio Astronomy Observatory

scholarly journals On the peculiarities in the spin-down of isolated radio pulsars

2012 ◽  
Vol 8 (S291) ◽  
pp. 208-208
Author(s):  
Augustine Chukwude
Keyword(s):  
Radio Astronomy ◽  
Time Resolution ◽  
Local Phase ◽  
Astronomy Observatory ◽  
Radio Pulsars ◽  
Short Term ◽  
Radio Astronomy Observatory ◽  
Long Term Changes ◽  
Timing Data

AbstractWe investigate the spin-down behaviour of a sample of 25 radio pulsars on decadal timescales (~ 18 years) using a continuous timing data obtained over a period of at Hartebeesthoek Radio Astronomy Observatory (HartRAO). Particular attention is placed on achieving a better time resolution of both the short-term and long-term changes in pulsar spin-down using local phase-coherent measurements of the spin-down rates (). We demonstrate that the spin-down of radio pulsars is generally complicated by a superposition of processes that may or may not be related. Specifically, our results show that (i) for 7 pulsars, the observed spin-down variation is largely stochastic, characterized by random and sustained jumps in of varying amplitudes, (ii) for 9 objects, the spin-down evolution shows dominant monotonic variations in superimposed on short-term stochastic jumps in the parameter, and (iii) for the remaining 9 pulsars, the long-term spin-down evolution is non-monotonic, dominated by some systematic excursion in the measured spin-down rates.

A Wideband Superconducting Filter Using Strong Coupling Resonators for Radio Astronomy Observatory

2009 ◽  
Vol 57 (7) ◽  
pp. 1783-1789 ◽  
Author(s):  
Tao Yu ◽  
Chunguang Li ◽  
Fei Li ◽  
Qiang Zhang ◽  
Liang Sun ◽  
...  
Keyword(s):  
Strong Coupling ◽  
Radio Astronomy ◽  
Astronomy Observatory ◽  
Radio Astronomy Observatory
Sign in / Sign up

Export Citation Format

Share Document