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Complex A is a high-velocity cloud that is traversing through the Galactic halo toward the Milky Way's disk. We combine both new and archival Green Bank Telescope observations to construct a spectroscopically resolved HI~21-cm map of this…

The 21-cm emission from atomic hydrogen (HI) is one of the most important tracers of the structure and dynamics of the interstellar medium. Thanks to Galactic rotation, the line is Doppler shifted and, assuming a model for the velocity…

星系天体物理 · 物理学 2023-05-26 Philipp Mertsch , Vo Hong Minh Phan

The nature of warm, ionized gas outside of galaxies may illuminate several key galaxy evolutionary processes. A serendipitous observation by the MaNGA survey has revealed a large, asymmetric H$\alpha$ complex with no optical counterpart…

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 present the size, shape and flux densities at millimeter continuum wavelengths, based on ALMA science verification observations in Band 3 (~94.6 GHz) and Band 6 (~228.7 GHz), from the binary Mira A (o Ceti) and Mira B. The Mira AB system…

太阳与恒星天体物理 · 物理学 2015-05-13 W. H. T. Vlemmings , S. Ramstedt , E. O'Gorman , E. M. L. Humphreys , M. Wittkowski , A. Baudry , M. Karovska

We present WSRT and VLA radio observations of the neutral hydrogen in the radio galaxy Coma A. We detect extended HI absorption against both radio lobes of Coma A, at distances of about 30 kpc from the centre. Coma A is the first radio…

天体物理学 · 物理学 2009-11-07 R. Morganti , T. A. Oosterloo , S. Tinti , C. N. Tadhunter , K. A. Wills , G. van Moorsel

Author offers and researched the new and revolutionary inflatable electrostatic AB space towers (mast, new space elevator) up to one hundred twenty thousands kilometers (or more) in height. The main innovation is filling the tower by…

综合物理 · 物理学 2007-05-23 Alexander Bolonkin

We report a trigonometric parallax measurement with the Very Long Baseline Array for the water maser in the distant high-mass star-forming region G75.30+1.32. This source has a heliocentric distance of 9.25+-0.45 kpc, which places it in the…

星系天体物理 · 物理学 2015-05-30 A. Sanna , M. J. Reid , T. M. Dame , K. M. Menten , A. Brunthaler , L. Moscadelli , X. W. Zheng , Y. Xu

Relativistic jets are among the most fascinating objects in the Universe, and recent high-resolution Very Long Baseline Interferometric (VLBI) observations, including the Global mm-VLBI Array and the Event Horizon Telescope (EHT), are able…

高能天体物理现象 · 物理学 2026-03-31 Felix Glaser , Christian M. Fromm , Luca Ricci , Yosuke Mizuno , Matthias Kadler , Karl Mannheim , Michael Janssen

The neutral atomic gas content of individual galaxies at large cosmological distances has until recently been difficult to measure due to the weakness of the hyperfine HI 21-cm transition. Here we estimate the HI gas mass of a sample of…

We present new, low-frequency images of the powerful FR I radio galaxy Hydra A (3C 218). Images were made with the Very Large Array (VLA) at frequencies of 1415, 330, and 74 MHz, with resolutions on the order of 20". The morphology of the…

天体物理学 · 物理学 2009-11-10 W. M. Lane , T. E. Clarke , G. B. Taylor , R. A. Perley , N. E. Kassim

We investigate the physical structure and conditions of photodissociation regions (PDRs) and molecular gas within the Pillars of Creation in the Eagle Nebula using SOFIA FEEDBACK observations of the [C II] 158 micron line. These…

We compare the detailed distributions of HI, H alpha, and 150 nm far-UV continuum emission in the spiral arms of M81 at a resolution of 9" (linear resolution 150 pc at 3.7 Mpc distance). The bright H alpha emission peaks are always…

天体物理学 · 物理学 2009-10-30 R. J. Allen , J. H. Knapen , R. Bohlin , T. Stecher

New deep VLA D array HI observations of the highly inclined nearby spiral galaxy NGC 2683 are presented. Archival C array data were processed and added to the new observations. To investigate the 3D structure of the atomic gas disk, we made…

星系天体物理 · 物理学 2016-02-17 B. Vollmer , F. Nehlig , R. Ibata

We report observations of ionized and warm molecular gas in the extended regions of the central galaxies in several cooling flow clusters. These show that both gas phases are present in these clusters to large radii. We trace both Pa alpha…

天体物理学 · 物理学 2009-11-11 W. Jaffe , M. N. Bremer , K. Baker

We present new high-resolution HI spectral line imaging of Coma P, the brightest HI source in the system HI 1232$+$20. This extremely low surface brightness galaxy was first identified in the ALFALFA survey as an "(Almost) Dark" object: a…

I review what is known and surmised about magnetic fields in space, from our Milky Way environment to the distant Universe beyond the GZK horizon. This includes our gradually improving specification of the CR propagation environment within…

高能天体物理现象 · 物理学 2015-03-17 Philipp P. Kronberg

We analyze high-resolution spectropolarimetric observations of a flux emerging region (FER) in order to understand its magnetic and kinematic structure. Our spectropolarimetric observations in the He I 1083.0 nm spectral region of a FER are…

We report on atomic gas (HI) and molecular gas (as traced by CO(2-1)) redshifted absorption features toward the nuclear regions of the closest powerful radio galaxy, Centaurus A (NGC 5128). Our HI observations using the Very Long Baseline…

宇宙学与河外天体物理 · 物理学 2015-05-19 D. Espada , A. B. Peck , S. Matsushita , K. Sakamoto , C. Henkel , D. Iono , F. P. Israel , S. Muller , G. Petitpas , Y. Pihlstroem , G. B. Taylor , D. V. Trung

The HR Del nova remnant was observed with the IFU-GMOS at Gemini North. The spatially resolved spectral data cube was used in the kinematic, morphological and abundance analysis of the ejecta. The line maps show a very clumpy shell with two…

太阳与恒星天体物理 · 物理学 2015-05-14 Manoel Moraes , Marcos Diaz