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We observed the high-mass star-forming region G335.579-0.292 with the Atacama Large Millimeter/submillimeter Array (ALMA) at 226 GHz with an angular resolution of 0.3'' ($\sim 1000$ au resolution at the source distance). G335.579-0.292…

We determine an optimal width and shape of the narrow-band filter centered around the He\,{\sc i} D$_{3}$ line for prominence and coronal mass ejection (CME) observations with the ASPIICS ({\it Association of Spacecraft for Polarimetric and…

太阳与恒星天体物理 · 物理学 2018-07-03 S. Jejčič , P. Heinzel , N. Labrosse , A. N. Zhukov , A. Bemporad , S. Fineschi , S. Gunár

Strong gravitational lensing acts as a cosmic telescope, enabling the study of the high-redshift universe. Astronomical interferometers, such as the Atacama Large Millimeter/submillimeter Array (ALMA), have provided high-resolution images…

Recently published ALMA observations suggest the presence of 20 ppb PH$_3$ in the upper clouds of Venus. This is an unexpected result, as PH$_3$ does not have a readily apparent source and should be rapidly photochemically destroyed…

地球与行星天体物理 · 物理学 2021-03-17 Alex B. Akins , Andrew P. Lincowski , Victoria S. Meadows , Paul G. Steffes

We present the polarization observations toward the circumstellar disk around HD 142527 by using Atacama Large Millimeter/submillimeter Array (ALMA) at the frequency of 343 GHz. The beam size is $0.51 " \times 0.44 "$, which corresponds to…

Planets are supposed to form in circumstellar disks. The gravitational potential of a planet perturbs the disk and leads to characteristic structures, i.e. spiral waves and gaps, in the disk's density profile. We perform a large-scale…

太阳与恒星天体物理 · 物理学 2012-12-12 Jan Philipp Ruge , Sebastian Wolf , Ana L. Uribe , Hubert H. Klahr

We analyzed AIA/SDO high-cadence images in all bands, HMI/SDO data, soft X-ray images from SXI/GOES-15, and Halpha images from the GONG network. We detected umbral brightenings that were visible in all AIA bands as well as in Halpha.…

太阳与恒星天体物理 · 物理学 2015-06-16 C. E. Alissandrakis , S. Patsourakos

We present the results of ALMA band-5 (~170 GHz) observations of the merging ultraluminous infrared galaxy, the "Superantennae" (IRAS 19254-7245) at z=0.0617, which has been diagnosed as containing a luminous obscured active galactic…

星系天体物理 · 物理学 2021-02-03 Masatoshi Imanishi , Yoshiaki Hagiwara , Shinji Horiuchi , Takuma Izumi , Kouichiro Nakanishi

ALMA has been operating since 2011, but has not yet been populated with the full suite of intended frequency bands. In particular, ALMA Band 2 (67-90 GHz) is the final band in the original ALMA band definition to be approved for production.…

The dynamics of prominence fine structures is a challenge to understand the formation of cool plasma prominence embedded in the hot corona. Recent observations from the high resolution Hinode/SOT telescope allow us to compute velocities…

太阳与恒星天体物理 · 物理学 2015-05-14 B. Schmieder , R. Chandra , A. Berlicki , P. Mein

We report ALMA observations of molecular gas and continuum emission in the 90 and 350 GHz bands toward a nearby Seyfert galaxy NGC 613. Radio continuum emissions were detected at 95 and 350 GHz from both the circum-nuclear disk (CND)…

星系天体物理 · 物理学 2018-02-05 Yusuke Miyamoto , Naomasa Nakai , Masumichi Seta , Dragan Salak , Makoto Nagai , Hiroyuki Kaneko

The Atacama Large Millimeter/sub-millimeter Array (ALMA) is already revolutionising our understanding of the Universe. However, ALMA is not yet equipped with all of its originally planned receiver bands, which will allow it to observe over…

We study the abundance of substructure in the matter density near galaxies using ALMA Science Verification observations of the strong lensing system SDP.81. We present a method to measure the abundance of subhalos around galaxies using…

The most complete catalogue of nearby stars (Gliese and Jarheiss, 1991) has been used to search for the stars whose photospheric thermal emission can be detected by the future millimeter array ALMA. We found that 446 nearby stars with…

天体物理学 · 物理学 2007-05-23 Jean-Francois Lestrade

We report on the first detection of pulsed radio emission from a radio pulsar with the ALMA telescope. The detection was made in the Band-3 frequency range (85-101 GHz) using ALMA in the phased-array mode developed for VLBI observations. A…

We present a flexible, annulus-by-annulus method to constrain the 2-D thermal structure of a protoplanetary disk from optically thick spectral line emission. Using synthetic disk models with a known temperature and density structure, we…

地球与行星天体物理 · 物理学 2025-09-19 Anna J. Fehr , Sean M. Andrews

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 launch of Hinode satellite led to the discovery of rising plumes, dark in chromospheric lines, in quiescent prominences that propagate from large (~10 Mm) bubbles that form at the base of the prominences. These plumes present a very…

太阳与恒星天体物理 · 物理学 2015-06-12 Andrew Hillier , Richard Hillier , Durgesh Tripathi

We present observations and analysis of the massive molecular outflow G331.512-0.103, obtained with ALMA band 7, continuing the work from Merello et al. (2013). Several lines were identified in the observed bandwidth, consisting of two…

During the initial data reduction of the Wisconsin H-Alpha Mapper (WHAM) H-Alpha Sky Survey, we have discovered several very long (~30--80 deg) filaments superimposed on the diffuse H-Alpha background. These features have no clear…

天体物理学 · 物理学 2009-10-30 L. M. Haffner , R. J. Reynolds , S. L. Tufte
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