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Using MUSE on the ESO-VLT, we obtained a 4 hour exposure of the z=3.12 radio galaxy MRC0316-257. We detect features down to ~10^-19 erg/s/cm^2/arcsec^2 with the highest surface brightness regions reaching more than a factor of 100 higher.…

We have carried out the first comprehensive investigation of enhanced line emission from molecular hydrogen, H$_{2}$ at 1333.79 {\AA}, observed at flare ribbons in SOL2014-04-18T13:03. The cool H$_{2}$ emission is known to be fluorescently…

Solar and Stellar Astrophysics · Physics 2021-02-24 Sargam M. Mulay , Lyndsay Fletcher

We characterize two candidate cool galactic outflows in two relatively low mass, highly inclined Virgo cluster galaxies: NGC4424 and NGC4694. Previous analyses of observations using the Atacama Large Millimeter Array (ALMA) carbon monoxide…

We present ALMA Cycle 4 observations of CO(1-0), CO(3-2), and $^{13}$CO(3-2) line emission in the brightest cluster galaxy of RXJ0821+0752. This is one of the first detections of $^{13}$CO line emission in a galaxy cluster. Half of the…

We present recent {\it Chandra} X-ray observations of the RXJ0821.0+0752 galaxy cluster in addition to ALMA observations of the CO(1-0) and CO(3-2) line emission tracing the molecular gas in its central galaxy. All of the CO line emission,…

Astrophysics of Galaxies · Physics 2019-01-16 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 study of ionized gas kinematics in high-z active galaxies plays a key part in our understanding of galactic evolution, in an age where nuclear activity was widespread and star formation close to its peak. We present a study of TXS…

Context. A statistically significant sampling of H2 rotational excitation in the diffuse interstellar medium (ISM) is essential to identifying its excitation mechanisms and assessing the importance of H2 in the cooling of the gas and the…

Astrophysics of Galaxies · Physics 2026-04-10 E. Nigou , B. Godard , P. Guillard , G. Pineau Des Forêts , M A Miville-Deschênes , P. Lesaffre

Cooling flows are observed in X-ray studies of the centres of cool core clusters, galaxy groups and individual elliptical galaxies. They are partly hidden from direct view by embedded cold gas so have been called Hidden Cooling Flows. X-ray…

Astrophysics of Galaxies · Physics 2025-08-21 A. C. Fabian , J. S. Sanders , G. J. Ferland , H. R. Russell , B. R. McNamara , C. Pinto , S. A. Walker

We present the results of near-infrared spectroscopic observations for a sample of 12 star-forming galaxies at 1.0<z<1.5, drawn from the DEEP2 Galaxy Redshift Survey. H-beta, [OIII], H-alpha, and [NII] emission-line fluxes are measured for…

Astrophysics · Physics 2009-11-13 Alice E. Shapley , Alison Coil , Chung-Pei Ma , Kevin Bundy

Aims: We searched for the molecular outflows from fifteen molecular clouds associated with ultra-compact and compact HII (UCHII/HII) regions and discussed possible gas heating mechanism. Methods: Mapping observations of CO $J=3-2$ and…

Astrophysics · Physics 2009-11-13 Sheng-Li Qin , Jun-Jie Wang , Gang Zhao , Martin Miller , Jun-Hui Zhao

We report the cumulative results of an on-going near-infrared search for redshifted H-alpha emission from normal galaxies at z>2. An infrared search reduces the bias due to reddening. Using narrow-band imaging with the Near Infrared Camera…

Astrophysics · Physics 2009-10-30 H. Teplitz , M. Malkan , I. S. McLean

The Ultra Luminous InfraRed Galaxy Mrk 231 reveals up to seven rotational lines of water (H2O) in emission, including a very high-lying (E_{upper}=640 K) line detected at a 4sigma level, within the Herschel/SPIRE wavelength range, whereas…

The radiative cooling time of hot gas in the cool cores of many galaxy clusters and massive elliptical galaxies drops in the centre to below 100 million years. The mass cooling rates inferred from simple modelling of X-ray observations of…

Astrophysics of Galaxies · Physics 2024-11-07 L. R. Ivey , A. C. Fabian , J. S. Sanders , C. Pinto , G. J. Ferland , S. Walker , J. Jiang

We combine observations of spiral galaxies in the [CII] line at 158 micron, made with the Long Wavelength Spectrometer aboard ISO, with previous data from the Kuiper Airborne Observatory to study the origin of this line, which is the main…

Astrophysics · Physics 2009-11-06 D. Pierini , J. Lequeux , A. Boselli , K. J. Leech , H. J. Voelk

We present new SINFONI VLT observations of molecular hydrogen (H2) in the central regions (< 2.5 kpc) of the youngest and closest radio source PKS B1718-649. We study the distribution of the H2 traced by the 1-0 S(1) ro-vibrational line,…

Astrophysics of Galaxies · Physics 2016-03-16 F. M. Maccagni , F. Santoro , R. Morganti , T. A. Oosterloo , J. B. R. Oonk , B. H. C. Emonts

Recent hydrodynamic simulations of galaxy formation reveal streams of cold (T ~ 1e4 K) gas flowing into the centers of dark matter halos as massive as 1e12-1e13.5 M_sun at redshifts z~1-3. In this paper we show that if > 20% of the…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 Mark Dijkstra , Abraham Loeb

Aims. We aim to understand the unexpected presence of mm-wave molecular absorption at -200 \kms $< {\rm v} < -140$ \kms\ in a direction that is well away from regions of the Galactic bulge where CO emission at such velocities is prominent.…

Astrophysics of Galaxies · Physics 2017-03-29 M. Gerin , H. Liszt

We use observations from the Giant Metrewave Radio Telescope (GMRT) to measure the atomic hydrogen gas content of star-forming galaxies at z = 0.24 (i.e. a look-backtime of ~3 Gyr). The sample of galaxies studied were selected from…

We summarise the results of a deep search for Lyman alpha emission from star-forming regions associated with damped Lyman alpha absorption systems and conclude that the Lyman alpha luminosity of high redshift galaxies is generally less than…

Astrophysics · Physics 2016-08-30 Max Pettini , Richard W. Hunstead , David L. King , Linda J. Smith

In the last two decades high resolution (< 5 arcsec) CO observations for ~ 150 galaxies have provided a wealth of information about the molecular gas morphologies in the circumnuclear regions. While in samples of 'normal' galaxies the…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 D. Espada , S. Martin , P. -Y. Hsieh , P. T. P. Ho , S. Matsushita , L. Verdes-Montenegro , J. Sabater , S. Verley , M. Krips , V. Espigares