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We present recent ALMA observations of the CO(1-0) and CO(3-2) emission lines in the brightest cluster galaxy of RXCJ1504.1$-$0248, which is one of the most extreme cool core clusters known. The central galaxy contains $1.9\times…

Astrophysics of Galaxies · Physics 2018-08-29 A. N. Vantyghem , B. R. McNamara , H. R. Russell , A. C. Edge , P. E. J. Nulsen , F. Combes , A. C. Fabian , M. McDonald , P. Salome

The filamentary nebula encompassing the central galaxy of the Perseus Cluster, NGC 1275, is a complex structure extending dozens of kiloparsecs from NGC 1275. Decades of previous works have focused on establishing the primary formation and…

The characterization of our Galaxy's longest filamentary gas features has been the subject of several studies in recent years, producing not only a sizeable sample of large-scale filaments, but also confusion as to whether all these…

Astrophysics of Galaxies · Physics 2018-09-19 Catherine Zucker , Cara Battersby , Alyssa Goodman

(Abridged) Aims. We derive the physical properties of a filament discovered in the dark cometary-shaped cloud L1251. Methods. Mapping observations in the NH3(1,1) and (2,2) inversion lines, encompassing 300 positions toward L1251, were…

Astrophysics of Galaxies · Physics 2016-02-10 S. A. Levshakov , D. Reimers , C. Henkel

Cold molecular gas is found in several clusters of galaxies (Edge, 2001, Salome' & Combes, 2003): single dish telescope observations in CO(1-0) and CO(2-1) emission lines have revealed the existence of large amounts of cold gas (up to…

Astrophysics · Physics 2009-11-10 P. Salome , F. Combes

We present observations in CO(3-2) that, combined with previous observations in CO(2-1), constrain the physical properties of the filamentary molecular gas in the central $\sim$6.5 kpc of NGC 1275, the central giant elliptical galaxy of the…

Astrophysics of Galaxies · Physics 2017-11-29 Jeremy Lim , Dinh-V-Trung , Jan Vrtilek , Laurence P. David , William Forman

The central arcminute of the Perseus cooling flow galaxy, NGC 1275, has been mapped with the JCMT in 12CO(2-1) at 21 arcsec resolution, with detections out to at least 36 arcsec (12 kpc). Within the limits of the resolution and coverage,…

Astrophysics · Physics 2015-06-24 Terry Bridges , Judith Irwin

We have studied the structure and kinematics of the dense molecular gas in the Orion Molecular Cloud 1 (OMC1) region with the N2H+ 3-2 line. The 6'x9' (~0.7x1.1 pc) region surrounding the Orion KL core has been mapped with the Submillimeter…

Astrophysics of Galaxies · Physics 2020-04-22 Yu-Hsuan Teng , Naomi Hirano

We present new high-spectral resolution observations (R = $\lambda/\Delta\lambda$ = 7000) of the filamentary nebula surrounding NGC 1275, the central galaxy of the Perseus cluster. These observations have been obtained with SITELLE, an…

We have detected four Giant Molecular cloud Associations (GMAs) (sizes < 6.6'' ~ 430 pc) in the western and eastern region of the polar ring in NGC2685 (the Helix galaxy) using the Owens Valley Radio Observatory (OVRO) millimeter…

Astrophysics · Physics 2009-11-07 E. Schinnerer , N. Z. Scoville

Dense molecular filaments are central to the star formation process, but the detailed manner in which they fragment into prestellar cores is not yet well understood. Here, we investigate the fragmentation properties and dynamical state of…

Solar and Stellar Astrophysics · Physics 2020-10-07 Guo Yin Zhang , Ph. Andre , A. Menshchikov , Ke Wang

We present new CO (13CO(1-0) and C18O(1-0)) and CS(2-1) line observations of an elongated filamentary structure (length ~30 pc) in the star-forming site S242, which were taken with the OSO-20m telescope. One filament's end hosts the S242…

Astrophysics of Galaxies · Physics 2019-05-29 Lokesh K. Dewangan , Lev E. Pirogov , Olga L. Ryabukhina , Devendra K. Ojha , Igor I. Zinchenko

Optical emission is detected from filaments around the central galaxies of clusters of galaxies. These filaments have lengths of tens of kiloparsecs. The emission is possibly due to heating caused by the dissipation of mechanical energy and…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 E. Bayet , T. W. Hartquist , S. Viti , D. A. Williams , T. A. Bell

Extended nebular filaments are seen at optical wavelengths in NGC 1275, the central galaxy in the Perseus cluster. The agents responsible for the excitation of these filaments remain poorly understood. In this paper we investigate possible…

Astrophysics · Physics 2009-10-31 B. M. Sabra , J. C. Shields , A. V. Filippenko

NGC 5128 (Centaurus A) is one of the best targets to study AGN-feedback in the local Universe. Optical filaments located at 16 kpc from the galaxy along the radio jet direction show recent star formation, likely triggered by the interaction…

Astrophysics of Galaxies · Physics 2019-06-27 Quentin Salomé , Philippe Salomé , Antoine Gusdorf , Françoise Combes

We present Herschel observations of the core of the Perseus cluster of galaxies. The brightest cluster galaxy, NGC 1275, is surrounded by a network of filaments previously imaged extensively in H{\alpha} and CO. In this work, we report…

We report the results of high spatial and spectral resolution integral-field spectroscopy of the central ~3 x 3 arcsec^2 of the active galaxy NGC 1275 (Perseus A), based on observations with the Near-infrared Integral Field Spectrograph…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 J. Scharwaechter , P. J. McGregor , M. A. Dopita , T. L. Beck

We present ALMA observations of the CO(1-0) and CO(3-2) line emission tracing filaments of cold molecular gas in the central galaxy of the cluster PKS0745-191. The total molecular gas mass of 4.6 +/- 0.3 x 10^9 solar masses, assuming a…

Studies of the kinematics of gaseous halos in some spiral galaxies have shown that the rotational velocity of the gas decreases with height above the midplane (z). This vertical velocity gradient has been observed in both the neutral and…

Astrophysics · Physics 2007-05-23 G. H. Heald , R. J. Rand , R. A. Benjamin , J. A. Collins , J. Bland-Hawthorn

We present high resolution images of the 12CO(2-1) emission in the central 1' (1 kpc) of NGC 5128 (Centaurus A), observed using the SMA. We elucidate for the first time the distribution and kinematics of the molecular gas in this region…

Astrophysics of Galaxies · Physics 2011-02-11 D. Espada , S. Matsushita , A. Peck , C. Henkel , D. Iono , F. P. Israel , S. Muller , G. Petitpas , Y. Pihlstroem , G. B. Taylor , Dinh-V-Trung