101 citations · 379 across the 20 of their papers we have counts for
20 papers
Coupled-Mode Equations with Arbitrary Mode Combinations for Kinetic-Inductance Superconducting Traveling-Wave Parametric Devices: Theory and Experimental Validation
F. Patricio Mena, Camilo Espinoza, Ryan O. Berriel +2
The coupled-mode equations (CMEs) have proven very successful in describing parametric processes in nonlinear optics. More recently, the same formulation has been used to model mic…
SiO Outflows in the Most Luminous and Massive Protostellar Sources of the Southern Sky
N. Guerra-Varas, M. Merello, L. Bronfman +4
(Abridged) High-mass star formation is far less understood than low-mass star formation. It entails molecular outflows, which disturb the protostellar clump. Studying these outflow…
The effect of complex dispersion and characteristic impedance on the gain of superconducting traveling-wave kinetic inductance parametric amplifiers
Javier Carrasco, Daniel Valenzuela, Claudio Falcón +2
Superconducting traveling-wave parametric amplifiers are a promising amplification technology suitable for applications in submillimeter astronomy. Their implementation relies on t…
A spectral survey of CH3CCH in the Hot Molecular Core G331.512-0.103
Julia C. Santos, Leonardo Bronfman, Edgar Mendoza +4
A spectral survey of methyl acetylene (CH3CCH) was conducted toward the hot molecular core/outflow G331.512-0.103. Our APEX observations allowed the detection of 41 uncontaminated…
The SEDIGISM survey: first data release and overview of the Galactic structure
F. Schuller, J. S. Urquhart, T. Csengeri +57
The SEDIGISM (Structure, Excitation and Dynamics of the Inner Galactic Interstellar Medium) survey used the APEX telescope to map 84 deg^2 of the Galactic plane between l = -60 deg…
The SEDIGISM survey: Molecular clouds in the inner Galaxy
A. Duarte-Cabral, D. Colombo, J. S. Urquhart +57
We use the 13CO(2-1) emission from the SEDIGISM high-resolution spectral-line survey of the inner Galaxy, to extract the molecular cloud population with a large dynamic range in sp…
APEX CO observations towards the photodissociation region of RCW120
Miguel Figueira, Annie Zavagno, Leonardo Bronfman +3
The edges of ionized (HII) regions are important sites for the formation of (high-mass) stars. Indeed, at least 30% of the galactic high mass star formation is observed there. The…
Revealing The CO X-factor In Dark Molecular Gas through Sensitive ALMA Absorption Observations
Gan Luo, Di Li, Ningyu Tang +11
Carbon-bearing molecules, particularly CO, have been widely used as tracers of molecular gas in the interstellar medium (ISM). In this work, we aim to study the properties of molec…
Cyanoacetylene in the outflow/hot molecular core G331.512-0.103
N. U. Duronea, L. Bronfman, E. Mendoza +10
Using APEX-1 and APEX-2 observations, we have detected and studied the rotational lines of the HCN molecule (cyanoacetylene) in the powerful outflow/hot molecular core G331.512…
ALMA observations of RCW 120 Fragmentation at 0.01pc scale
Miguel Figueira, Leonardo Bronfman, Annie Zavagno +4
Little is known about how high-mass stars form. Around 30\% of the young high-mass stars in the Galaxy are observed at the edges of ionized (HII) regions. Therefore these are place…
Digital compensation of the side-band-rejection ratio in a fully analog 2SB sub-millimeter receiver
R. Rodriguez, R. Finger, F. P. Mena +7
In observational radio astronomy, sideband-separating receivers are preferred, particularly under high atmospheric noise, which is usually the case in the sub-millimeter range. How…
A Calibrated Digital Sideband Separating Spectrometer for Radio Astronomy Applications
Ricardo Finger, Patricio Mena, Nicolas Reyes +2
Dual sideband (2SB) receivers are well suited for the spectral observation of complex astronomical signals over a wide frequency range. They are extensively used in radio astronomy…
A FPGA-based Fast Converging Digital Adaptive Filter for Real-time RFI Mitigation on Ground Based Radio Telescopes
R. Finger, F. Curotto, R. Fuentes +3
Radio Frequency Interference (RFI) is a growing concern in the radio astronomy community. Single-dish telescopes are particularly susceptible to RFI. Several methods have been deve…
G331.512-0.103: An Interstellar Laboratory for Molecular Synthesis I. The Ortho-to-para Ratios for CHOH and CHCN
E. Mendoza, L. Bronfman, N. U. Duronea +7
Spectral line surveys reveal rich molecular reservoirs in G331.512-0.103, a compact radio source in the center of an energetic molecular outflow. In this first work, we analyse the…
The diffuse molecular component in the nuclear bulge of the Milky Way
D. Riquelme, L. Bronfman, R. Mauersberger +4
Context: The bulk of the Molecular gas in the Central Molecular Zone (CMZ) of the Galactic center region shows warm kinetic temperatures, ranging from K in the coldest and de…
The Atacama Large Millimeter/submillimeter Array (ALMA) Band-1 Receiver
Yau De Huang, Oscar Morata, Patrick Michel Koch +29
The Atacama Large Millimeter/submillimeter Array(ALMA) Band 1 receiver covers the 35-50 GHz frequency band. Development of prototype receivers, including the key components and sub…
Large-scale CO (J=4-3) Mapping toward the Orion-A Giant Molecular Cloud
Shun Ishii, Masumichi Seta, Makoto Nagai +10
We have mapped the Orion-A Giant Molecular Cloud in the CO (J=4-3) line with the Tsukuba 30-cm submillimeter telescope.The map covered a 7.125 deg^2 area with a 9' resolution, incl…
Ultra-pure digital sideband separation at sub-millimeter wavelengths
R. Finger, F. P. Mena, A. Barishev +7
Deep spectral-line surveys in the mm and sub-mm range can detect thousands of lines per band uncovering the rich chemistry of molecular clouds, star forming regions and circumstell…
Microwave Loss Reduction in Cryogenically Cooled Conductors
R. Finger, A. R. Kerr
Measurements of microwave attenuation at room temperature and 4.2 K have been performed on some conductors commonly used in receiver input circuits. The reduction in loss on coolin…
The infrared K-band identification of the DSO/G2 source from VLT and Keck data
Andreas Eckart, M. Horrobin, S. Britzen +24
A fast moving infrared excess source (G2) which is widely interpreted as a core-less gas and dust cloud approaches Sagittarius A* (SgrA*) on a presumably elliptical orbit. VLT K_s-…