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We analyse 850um continuum observations of eight massive X-ray detected galaxy clusters at z~0.8-1.6 taken with SCUBA-2 on the James Clerk Maxwell Telescope. We find an average overdensity of 850um-selected sources of a factor of 4+/-2 per…

Astrophysics of Galaxies · Physics 2019-04-10 E. A. Cooke , Ian Smail , S. M. Stach , A. M. Swinbank , R. G. Bower , Chian-Chou Chen , Y. Koyama , A. P. Thomson

We present new multi-wavelength observations of the first submm-selected galaxy, SMM J02399-0136 at z=2.8. These observations include mapping of the CO J=1-0 emission using elements of the Expanded VLA, as well as high-resolution 1.4-GHz…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Rob Ivison , Ian Smail , Padeli P. Papadopoulos , Isak Wold , Johan Richard , A. M. Swinbank , Jean-Paul Kneib , Frazer N. Owen

We present here the continuum submillimeter maps of the molecular cloud around the M42 Nebula in the Orion region. These have been obtained in four wavelength bands (200, 260, 360 and 580 microns) with the ProNaOS two meter balloon-borne…

We present the first high angular resolution study of giant molecular clouds (GMCs) in the nearby spiral galaxy NGC 300, based on observations from the Submillimeter Array (SMA). We target eleven 500 pc-sized regions of active star…

Astrophysics of Galaxies · Physics 2016-04-28 Christopher Faesi , Charles Lada , Jan Forbrich

We have carried out survey observations toward the Galactic plane at l~38 deg in the 12CO and 13CO J=1-0 lines using the Nobeyama Radio Observatory 45-m telescope. A wide area (0.8 x 0.8 deg) was mapped with high spatial resolution (17").…

Astrophysics of Galaxies · Physics 2012-06-06 Tsuyoshi Sawada , Tetsuo Hasegawa , Masahiro Sugimoto , Jin Koda , Toshihiro Handa

We present a full analysis of a broadband spectral line survey of Sagittarius B2 (Main), one of the most chemically rich regions in the Galaxy located within the giant molecular cloud complex Sgr B2 in the Central Molecular Zone. Our goal…

Astrophysics of Galaxies · Physics 2021-07-07 T. Möller , P. Schilke , A. Schmiedeke , E. A. Bergin , D. C. Lis , Á. Sánchez-Monge , A. Schwörer , C. Comito

In the centre of our galaxy lies a super-massive black hole, identified with the radio source Sagittarius A*. This black hole has an estimated mass of around 4 million solar masses. Although Sagittarius A* is quite dim in terms of total…

High Energy Astrophysical Phenomena · Physics 2016-09-02 Michael Walls , Maria Chernyakova , Regis Terrier , Andrea Goldwurm

The saturated n-propyl cyanide was recently detected in Sagittarius B2(N). The next larger unbranched alkyl cyanide is n-butyl cyanide. We provide accurate rest frequency predictions beyond the millimeter wave range to search for this…

Astrophysics of Galaxies · Physics 2013-08-06 M. H. Ordu , H. S. P. Müller , A. Walters , M. Nuñez , F. Lewen , A. Belloche , K. M. Menten , S. Schlemmer

At centimeter wavelengths, single-dish observations have suggested that the Sagittarius (Sgr) B2 molecular cloud at the Galactic Center hosts weak maser emission from several organic molecules, including CH$_2$NH, HNCNH, and HCOOCH$_3$.…

Astrophysics of Galaxies · Physics 2024-04-22 Ci Xue , Anthony Remijan , Alexandre Faure , Emmanuel Momjian , Todd R. Hunter , Ryan A. Loomis , Eric Herbst , Brett McGuire

The discovery of amino acids in meteorites and the detection of glycine in samples returned from a comet to Earth suggest that the interstellar chemistry is capable of producing such complex organic molecules. Our goal is to investigate the…

Astrophysics of Galaxies · Physics 2014-08-25 Arnaud Belloche , Holger S. P. Müller , Karl M. Menten , Peter Schilke , Claudia Comito

We identify multi-wavelength counterparts to 1,147 submillimeter sources from the S2COSMOS SCUBA-2 survey of the COSMOS field by employing a recently developed radio$+$machine-learning method trained on a large sample of ALMA-identified…

Submillimetre galaxies (SMGs) are among the most luminous dusty galaxies in the Universe, but their true nature remains unclear; are SMGs the progenitors of the massive elliptical galaxies we see in the local Universe, or are they just a…

We report sub-arcsecond resolution IRAM PdBI millimeter CO interferometry of four z~2 submillimeter galaxies (SMGs), and sensitive CO (3-2) flux limits toward three z~2 UV-/optically selected star forming galaxies. The new data reveal for…

We present so far the highest resolution ($\sim$0.04") ALMA 1.3 mm continuum observations of three massive star-forming clumps in the Central Molecular Zone, namely 20 km s$^{-1}$ C1, 20 km $^{-1}$ C4, and Sgr C C4, which reveal prevalent…

We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of the submillimeter dust continuum and H2D+ 1_{10}-1_{11} emission toward two evolved, potentially protostellar cores within the Ophiuchus molecular cloud, Oph A…

Solar and Stellar Astrophysics · Physics 2015-06-23 R. K. Friesen , J. Di Francesco , T. L. Bourke , P. Caselli , J. K. Jørgensen , J. E. Pineda , M. Wong

We present a measurement of the spatial clustering of submillimetre galaxies (SMGs) at z = 1-3. Using data from the 870 micron LESS survey, we employ a novel technique to measure the cross-correlation between SMGs and galaxies, accounting…

We report subarcsecond images of the high-mass star forming region Onsala 1 (ON 1) made with the Submillimeter Array (SMA) at 0.85 mm and the Very Large Array at 1.3 cm and 3.6 cm. ON~1 is one of the smallest ultracompact HII regions in the…

Astrophysics of Galaxies · Physics 2011-02-11 Yu-Nung Su , Sheng-Yuan Liu , Jeremy Lim

Massive stars (M $\gsim 10$ \msun) form from collapse of parsec-scale molecular clumps. How molecular clumps fragment to give rise to massive stars in a cluster with a distribution of masses is unclear. We search for cold cores that may…

Astrophysics of Galaxies · Physics 2015-05-27 Qizhou Zhang , Ke Wang

We present first and preliminary submillimeter continuum images of the Galactic Center region obtained with the new Caltech Submillimeter Observatory facility camera SHARC II. The instrument allows 350 micron observations with unprecedented…

Astrophysics · Physics 2017-01-18 Johannes Staguhn , Dominic Benford , Mark Morris , Keven Uchida

The origin, structure and evolution of the small gas cloud, G2, is investigated, that is on an orbit almost straight into the Galactic central supermassive black hole (SMBH). G2 is a sensitive probe of the hot accretion zone of Sgr A*,…