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The large-scale mass distributions of galaxy-scale strong lenses have long been assumed to be well-described by a singular ellipsoidal power-law density profile with external shear. However, the inflexibility of this model could lead to…

星系天体物理 · 物理学 2024-08-14 H. R. Stacey , D. M. Powell , S. Vegetti , J. P. McKean , C. D. Fassnacht , D. Wen , C. M. O'Riordan

The Atacama Large Millimeter/submillimeter (ALMA) Array Front End (FE) system is the first element in a complex chain of signal receiving, conversion, processing and recording. 70 Front Ends will be required for the project. The Front End…

天体物理仪器与方法 · 物理学 2010-09-02 Geoffrey A. Ediss , Joshua Crabtree , Kirk Crady , Erik Gaines , Morgan McLeod , Greg Morris , Rick Williams , Antonio Perfetto , John Webber

We report on the first observations of neutron star low-mass X-ray binaries with the Atacama Large Millimeter/submillimeter Array (ALMA) at $\sim$300 GHz. Quasi-simultaneous observations of 4U 1728-34 and 4U 1820-30 were performed at radio…

高能天体物理现象 · 物理学 2017-03-22 M. Diaz Trigo , S. Migliari , J. C. A. Miller-Jones , F. Rahoui , D. M. Russell , V. Tudor

Temporal variation of millimeter lines is a new direction of research for evolved stars. It has the potential to probe the dynamical wind launching processes from time dimension. We report here the first ALMA (Atacama Large Millimeter…

太阳与恒星天体物理 · 物理学 2019-10-09 J. H. He , T. Kamiński , R. E. Mennickent , V. I. Shenavrin , Diego Mardones , Wei Wang , Baitian Tang , M. R. Schmidt , R. Szczerba , Jixing. Ge

The success of an astronomical facility is measured by its scientific impact. A principal metric for this impact is the ensemble of peer-reviewed publications based on the observational data obtained by the facility. We present a…

Since the IAU (maser-)Symposium 287 in Stellenbosch/South Africa (Jan. 2012), great progress has been achieved in studying extragalactic maser sources. Sensitivity has reached a level allowing for dedicated maser surveys of extragalactic…

星系天体物理 · 物理学 2018-08-22 C. Henkel , J. -E. Greene , F. Kamali

We targeted the massive star forming region W33A using the Atacama Large Sub/Millimeter Array (ALMA) in band 6 (230 GHz) and 7 (345 GHz) to search for a sub-1000au disc around the central O-type massive young stellar object (MYSO) W33A…

太阳与恒星天体物理 · 物理学 2017-04-19 L. T. Maud , M. G. Hoare , R. Galván-Madrid , Q. Zhang , E. Keto , K. G. Johnston , J. E. Pineda

Aims. Studying protostellar objects in their earliest stages, particularly during the Class 0 phase, provides key insight into the beginnings of planet formation and dust evolution. Disentangling the various components, however, is…

The thermal emission of transneptunian objects (TNO) and Centaurs has been observed at mid- and far-infrared wavelengths - with the biggest contributions coming from the Spitzer and Herschel space observatories-, and the brightest ones also…

地球与行星天体物理 · 物理学 2020-01-22 Thomas Müller , Emmanuel Lellouch , Sonia Fornasier

We investigate the potential use of nebular emission lines in the rest-frame far-infrared (FIR) for determining spectroscopic redshift of z>8 galaxies with the Atacama Large Millimeter/sub-millimeter Array (ALMA). After making a line…

星系天体物理 · 物理学 2014-06-19 Akio K. Inoue , Ikkoh Shimizu , Yoichi Tamura , Hiroshi Matsuo , Takashi Okamoto , Naoki Yoshida

Interferometric observations of the Sun with ALMA provide valuable diagnostic tools for studying the small-scale dynamics of the solar atmosphere. Estimations of the observability of the small-scale dynamics as a function of spatial…

太阳与恒星天体物理 · 物理学 2021-12-08 Henrik Eklund , Sven Wedemeyer , Mikołaj Szydlarski , Shahin Jafarzadeh

Recent three-dimensional radiation hydrodynamic simulations by Wedemeyer et al. (2004) suggest that the solar chromosphere is highly structured in space and time on scales of only 1000 km and 20-25 sec, resp.. The resulting pattern consists…

天体物理学 · 物理学 2007-05-23 S. Wedemeyer-Boehm , H. -G. Ludwig , M. Steffen , B. Freytag , H. Holweger

In recent years, ALMA has been able to observe large-scale substructures within protoplanetary disks. Comparison with the predictions from models of planet-disk interaction has indicated that most of these disk substructures can be…

地球与行星天体物理 · 物理学 2022-04-06 Benjamin Burrill , Luca Ricci , Sarah Harter , Shangjia Zhang , Zhaohuan Zhu

We present the survey design, data reduction, construction of images, and source catalog of the Atacama Large Millimeter/submillimeter Array (ALMA) twenty-six arcmin^2 survey of GOODS-S at one-millimeter (ASAGAO). ASAGAO is a deep (1sigma ~…

We present the first observation of a solar prominence at $84-116$ GHz using the high resolution interferometric imaging of ALMA. Simultaneous observations in H$\alpha$ from Bia{\l}kaw Observatory and with SDO/AIA reveal similar prominence…

The Ha line, one of the most studied chromospheric diagnostics, is a tracer for magnetic field structures, while its line core intensity provides an estimate of the mass density. The brightness temperatures from Atacama Large…

太阳与恒星天体物理 · 物理学 2024-04-29 Sneha Pandit , Sven Wedemeyer , Mats Carlsson , Mikołaj Szydlarski

The ALMA Central Molecular Zone Exploration Survey, ACES, has mapped $\gtrsim1000$ square arcminutes at 3 mm toward the center of our Galaxy. ACES provides the first large-scale, high-resolution ($\sim2.5$") view of the central $\sim200$…

The formation of stars is usually accompanied by the launching of protostellar outflows. Observations with the Atacama Large Millimetre/sub-millimetre Array (ALMA) will soon revolutionalise our understanding of the morphologies and…

太阳与恒星天体物理 · 物理学 2014-01-07 Thomas Peters , Pamela D. Klaassen , Daniel Seifried , Robi Banerjee , Ralf S. Klessen

The Packed Ultra-wideband Mapping Array (PUMA) is a proposed low-resolution transit interferometric radio telescope operating over the frequency range 200 - 1100MHz. Its rich science portfolio will include measuring structure in the…

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