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We have detected the v=1-0 S(1) (2.1218 um) and v=2-1 S(1) (2.2477 um) lines of H_2 in the Galactic centre, in a 90 x 27 arcsec region between the northeastern boundary of the non-thermal source, Sgr A East, and the giant molecular cloud…

The center of M83, a barred starburst galaxy with a double nucleus, has been observed in the CO(J=2-1) and CO(J=3-2) lines with the Submillimeter Array. The molecular gas shows a distribution and kinematics typical for barred galaxies at…

The central molecular zone (CMZ) hosts some of the most massive and dense molecular clouds and star clusters in the Galaxy, offering an important window into star formation under extreme conditions. Star formation in this extreme…

Astrophysics of Galaxies · Physics 2017-02-22 J. D. Henshaw

We carried out deep searches for CO line emission in the outer disk of M33, at R>7 kpc, and examined the dynamical conditions that can explain variations in the mass distribution of the molecular cloud throughout the disk of M33. We used…

Astrophysics of Galaxies · Physics 2019-02-20 Edvige Corbelli , Jonathan Braine , Carlo Giovanardi

With the aim of investigating the presence of molecular and dust clumps linked to two star forming regions identified in the expanding molecular envelope of the stellar wind bubble RCW78, we analyzed the distribution of the molecular gas…

Astrophysics of Galaxies · Physics 2015-06-17 C. E. Cappa , M. Rubio , G. A. Romero , N. U. Duronea , V. Firpo

The Multi-Scale Continuum and Line Exploration of W49 (MUSCLE W49) is a comprehensive gas and dust survey of the giant molecular cloud (GMC) of W49A, the most luminous star-formation region in the Milky Way. It covers the entire GMC at…

The diffuse gamma-ray sky revealed 'Bubbles' of emission above and below the Galactic Plane symmetric around the centre of the Milky Way with a height of 10 kpc in both directions. At present there is no convincing explanation for the…

High Energy Astrophysical Phenomena · Physics 2015-06-22 Wim de Boer , Markus Weber

The Milky Way's Central Molecular Zone (CMZ) is the largest concentration of dense molecular gas in the Galaxy, the structure of which is shaped by the complex interplay between Galactic-scale dynamics and extreme physical conditions.…

By mapping the molecular fraction of the Galactic Center (GC), we quantitatively address the question of how much molecular and central the CMZ (Central Molecular Zone) is. For this purpose we analyze the CO and HI-line archival data, and…

Astrophysics of Galaxies · Physics 2022-09-14 Yoshiaki Sofue

We study the gas inflows towards the Galactic Central Molecular Zone (CMZ) based on the gas morphological and kinematic features from the MWISP in the region of l=1.2 deg--19.0 deg and |b|<3.0 deg. We find that the near dust lane extends to…

Astrophysics of Galaxies · Physics 2024-08-06 Yang Su , Shiyu Zhang , Yan Sun , Ji Yang , Qing-Zeng Yan , Shaobo Zhang , Zhiwei Chen , Xuepeng Chen , Xin Zhou , Lixia Yuan

We report 350 and 230 GHz observations of molecular gas and dust in the starburst nucleus of NGC 253 at 20-40 pc (1"-2") resolution. The data contain CO(3-2), HCN(4-3), CO(2-1), 13CO(2-1), C18O(2-1), and continuum at 0.87 mm and 1.3 mm…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-27 Kazushi Sakamoto , Rui-Qing Mao , Satoki Matsushita , Alison B. Peck , Tsuyoshi Sawada , Martina C. Wiedner

Using observed GALEX far-ultraviolet (FUV) fluxes and VLA images of the 21-cm HI column densities, along with estimates of the local dust abundances, we measure the volume densities of a sample of actively star-forming giant molecular…

Astrophysics · Physics 2009-11-13 Jonathan S. Heiner , Ronald J. Allen , O. Ivy Wong , Pieter C. van der Kruit

We performed a multi-wavelength study toward the filamentary cloud G47.06+0.26 to investigate the gas kinematics and star formation. We present the 12CO (J=1-0), 13CO (J=1-0) and C18O (J=1-0) observations of G47.06+0.26 obtained with the…

Astrophysics of Galaxies · Physics 2018-01-10 Jin-Long Xu , Ye Xu , Chuan-Peng Zhang , Xiao-Lan Liu , Naiping Yu , Chang-Chun Ning , Bing-Gang Ju

HI 21 cm observations with the NRAO 140 Foot telescope have revealed a giant HI cloud (G28.17+0.05) in the Galactic plane that has unusual properties. The cloud is 150 pc in diameter, is at a distance of 5 kpc, and contains as much as…

Astrophysics · Physics 2007-05-23 Anthony Minter , Felix J. Lockman

Fine structure of the density distribution in giant molecular clouds (GMC) around W43 (G31+00+90 km/s at $\sim 5.5$ kpc) was analyzed using the FUGIN$^*$ CO-line survey at high-angular ($20''\sim 0.5$ pc) and velocity (1.3 km/s) resolutions…

Astrophysics of Galaxies · Physics 2021-02-02 Yoshiaki Sofue

The Galactic Centre contains a supermassive black hole with a mass of 4 million suns within an environment that differs markedly from that of the Galactic disk. While the black hole is essentially quiescent in the broader context of active…

Astrophysics of Galaxies · Physics 2019-09-13 I. Heywood , F. Camilo , W. D. Cotton , F. Yusef-Zadeh , T. D. Abbott , R. M. Adam , M. A. Aldera , E. F. Bauermeister , R. S. Booth , A. G. Botha , D. H. Botha , L. R. S. Brederode , Z. B. Brits , S. J. Buchner , J. P. Burger , J. M. Chalmers , T. Cheetham , D. de Villiers , M. A. Dikgale-Mahlakoana , L. J. du Toit , S. W. P. Esterhuyse , B. L. Fanaroff , A. R. Foley , D. J. Fourie , R. R. G. Gamatham , S. Goedhart , S. Gounden , M. J. Hlakola , C. J. Hoek , A. Hokwana , D. M. Horn , J. M. G. Horrell , B. Hugo , A. R. Isaacson , J. L. Jonas , J. D. B. L. Jordaan , A. F. Joubert , G. I. G. Józsa , R. P. M. Julie , F. B. Kapp , J. S. Kenyon , P. P. A. Kotzé , H. Kriel , T. W. Kusel , R. Lehmensiek , D. Liebenberg , A. Loots , R. T. Lord , B. M. Lunsky , P. S. Macfarlane , L. G. Magnus , C. M. Magozore , O. Mahgoub , J. P. L. Main , J. A. Malan , R. D. Malgas , J. R. Manley , M. D. J. Maree , B. Merry , R. Millenaar , N. Mnyandu , I. P. T. Moeng , T. E. Monama , M. C. Mphego , W. S. New , B. Ngcebetsha , N. Oozeer , A. J. Otto , S. S. Passmoor , A. A. Pate , A. Peens-Hough , S. J. Perkins , S. M. Ratcliffe , R. Renil , A. Rust , S. Salie , L. C. Schwardt , M. Serylak , R. Siebrits , S. K. Sirothia , O. M. Smirnov , L. Sofeya , P. S. Swart , C. Tasse , D. T. Taylor , I. P. Theron , K. Thorat , A. J. Tiplad , S. Tshongweni , T. J. van Balla , A. van der Byl , C. van der Merwe , C. L. van Dyk , R. Van Rooyen , V. Van Tonder , R. Van Wyk , B. H. Wallace , M. G. Welz , L. P. Williams

We have observed the central region of the IR-dark cloud filament associated with IRAS 18507+0121 at millimeter wavelengths in CO(1-0), 13CO(1-0), and C18O(1-0) line emission and with the Spitzer Space Telescope at mid-IR wavelengths. Five…

Dense, star-forming gas is believed to form at the stagnation points of large-scale ISM flows, but observational examples of this process in action are rare. We here present a giant molecular cloud (GMC) sandwiched between two colliding…

Astrophysics of Galaxies · Physics 2015-06-23 J. R. Dawson , E. Ntormousi , Y. Fukui , T. Hayakawa , K. Fierlinger

The effect of a newly born star cluster inside a giant molecular cloud (GMC) is to produce a hot bubble and a thin, dense shell of interstellar gas and dust swept up by the H II expansion, strong stellar winds, and repeated supernova…

Astrophysics · Physics 2009-11-13 Lihong Yao , T. A. Bell , S. Viti , J. A. Yates , E. R. Seaquist

We have surveyed a ~0.9-square-degree area of the W3 giant molecular cloud and star-forming region in the 850-micron continuum, using the SCUBA bolometer array on the James Clerk Maxwell Telescope. A complete sample of 316 dense clumps was…

Astrophysics · Physics 2009-06-23 T J T Moore , D E Bretherton , T Fujiyoshi , N A Ridge , J Allsopp , M G Hoare , S L Lumsden , J S Richer
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