643 citations · 2.7k across the 47 of their papers we have counts for
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Globular Cluster Populations in Four Early-Type Poststarburst Galaxies
Aparna Maybhate, Paul Goudfrooij, Francois Schweizer +2
We present a study of the globular cluster systems of four early-type poststarburst galaxies using deep g and I-band images from the ACS camera aboard the Hubble Space Telescope (H…
A New Distance to The Antennae Galaxies (NGC 4038/39) Based on the Type Ia Supernova 2007sr
Francois Schweizer, Christopher R. Burns, Barry F. Madore +13
Traditionally, the distance to NGC 4038/39 has been derived from the systemic recession velocity, yielding about 20 Mpc for H_0 = 72 km/s/Mpc. Recently, this widely adopted distanc…
Fueling QSOs: The Relevance of Mergers
Nicola Bennert, Gabriela Canalizo, Bruno Jungwiert +4
To study the relevance of mergers for the fueling of QSOs, we are currently conducting an HST imaging campaign of a sample of QSO host galaxies classified as ellipticals in the lit…
Evidence for Merger Remnants in Early-Type Host Galaxies of Low-Redshift QSOs
Nicola Bennert, Gabriela Canalizo, Bruno Jungwiert +4
We present results from a pilot HST ACS deep imaging study in broad-band V of five low-redshift QSO host galaxies classified in the literature as ellipticals. The aim of our study…
Searching for Mergers in Early-Type QSO Host Galaxies and a Control Sample of Inactive Ellipticals
Nicola Bennert, Gabriela Canalizo, Bruno Jungwiert +4
We present very deep HST/ACS images of five QSO host galaxies, classified as undisturbed ellipticals in earlier studies. For four of the five objects, our images reveal strong sign…
Evidence for Three Subpopulations of Globular Clusters in the Early-Type Post-Starburst Shell Galaxy AM 0139-655
A. Maybhate, P. Goudfrooij, F. Schweizer +2
We present deep HST ACS images of the post-starburt shell galaxy AM 0139-655. We find evidence for the presence of three distinct globular cluster subpopulations associated with th…
Spectacular Shells in the Host Galaxy of the QSO MC2 1635+119
Gabriela Canalizo, Nicola Bennert, Bruno Jungwiert +4
We present deep HST/ACS images and Keck spectroscopy of MC2 1635+119, a QSO hosted by a galaxy previously classified as an undisturbed elliptical. Our new images reveal dramatic sh…
Gemini Spectroscopic Survey of Young Star Clusters in Merging/Interacting Galaxies. II. NGC 3256 Clusters
Gelys Trancho, Nate Bastian, Bryan W. Miller +1
We present Gemini optical spectroscopy of 23 young star clusters in NGC3256. We find that the cluster ages range are from few Myr to ~150 Myr. All these clusters are relatively mas…
Remnant of a "Wet" Merger: NGC 34 and Its Young Massive Clusters, Young Stellar Disk, and Strong Gaseous Outflow
Francois Schweizer, Patrick Seitzer
This paper presents new images and spectroscopy of NGC 34 (Mrk 938) obtained with the du Pont 2.5-m and Baade 6.5-m telescopes at Las Campanas, plus photometry of an HST archival V…
Dynamical Evolution of Globular Cluster Systems formed in Galaxy Mergers: Deep HST/ACS Imaging of Old and Intermediate-Age Globular Clusters in NGC 3610
Paul Goudfrooij, Francois Schweizer, Diane Gilmore +1
(ABRIDGED) The ACS camera on board the Hubble Space Telescope has been used to obtain deep images of the giant elliptical galaxy NGC 3610, a well-established dissipative galaxy mer…
Globular Cluster Formation in Mergers
Francois Schweizer
Mergers of gas-rich galaxies lead to gravitationally driven increases in gas pressure that can trigger intense bursts of star and cluster formation. Although star formation itself…
Dynamical Mass Estimates for Two Luminous Star Clusters in Galactic Merger Remnants
N. Bastian, R. P. Saglia, P. Goudfrooij +4
We present high-dispersion spectra of two extremely massive star clusters in galactic merger remnants. One cluster, W30, is located in the ~500 Myr old merger remnant NGC 7252 and…
Chemical enrichment of the complex hot ISM of the Antennae Galaxies: II. Physical properties of the hot gas and supernova feedback
A. Baldi, J. C. Raymond, G. Fabbiano +5
We investigate the physical properties of the interstellar medium (ISM) in the merging pair of galaxies known as The Antennae (NGC 4038/39), using the deep coadded ~411 ks Chandra…
Luminosity and mass limits for the progenitor of the type Ic supernova 2004gt in NGC 4038
Justyn R. Maund, Stephen Smartt, Francois Schweizer
We report our attempts to locate the progenitor of the type Ic SN 2004gt in NGC 4038. We use high resolution HST ACS images of SN 2004gt and have compared them with deep pre-explos…
STIS Spectroscopy of Young Star Clusters in "The Antennae" Galaxies (NGC 4038/4039)
Bradley C. Whitmore, Diane Gilmore, C. Leitherer +6
Long-slit spectra of several dozen young star clusters have been obtained at three positions in the Antennae galaxies with the Space Telescope Imaging Spectrograph (STIS) and its 5…
Merger-Induced Starbursts
Francois Schweizer
Extragalactic starbursts induced by gravitational interactions can now be studied from z = ~0 to ~2. The evidence that mergers of gas-rich galaxies tend to trigger galaxy-wide star…
Chemical enrichment of the complex hot ISM of the Antennae galaxies: I. Spatial and spectral analysis of the diffuse X-ray emission
A. Baldi, J. C. Raymond, G. Fabbiano +5
We present an analysis of the properties of the hot interstellar medium (ISM) in the merging pair of galaxies known as The Antennae (NGC 4038/39), performed using the deep, coadded…
Deep Luminosity Functions of Old and Intermediate-Age Globular Clusters in NGC 1316: Evidence for Dynamical Evolution of Second-Generation Globular Clusters
Paul Goudfrooij, Diane Gilmore, Bradley C. Whitmore +1
The Advanced Camera for Surveys on board the Hubble Space Telescope has been used to obtain deep high-resolution images of the giant early-type galaxy NGC 1316 which is an obvious…
Keck Spectroscopy of Two Young Globular Clusters in the Merger Remnant NGC 3921
Francois Schweizer, Patrick Seitzer, Jean P. Brodie
Low-resolution UV-to-visual spectra of two candidate globular clusters in the merger remnant NGC 3921 are presented. These two clusters of apparent magnitude V = 22.2 (Mv = -12.5)…
Luminosity Profiles of Resolved Young Massive Clusters
Francois Schweizer
Young massive clusters (YMCs) differ markedly from old globular clusters in featuring extended, rather than tidally truncated, envelopes. Their projected- luminosity profiles are w…
X-raying Chemical Evolution and Galaxy Formation in The Antennae
G. Fabbiano, A. Baldi, A. R. King +6
We present the integrated 411 ks {\it Chandra} ACIS-S exposure of the Antennae galaxies (NGC 4038/39). Besides a rich population of point-like sources, this spectacular image revea…
The dynamical mass of the young cluster W3 in NGC 7252: Heavy-Weight globular cluster or ultra compact dwarf galaxy ?
C. Maraston, N. Bastian, R. P. Saglia +3
We have determined the dynamical mass of the most luminous stellar cluster known to date, i.e. object W3 in the merger remnant galaxy NGC 7252. The dynamical mass is estimated from…
A Variable Ultraluminous Supersoft X-ray Source in "The Antennae": Stellar-Mass Black Hole or White Dwarf?
G. Fabbiano, A. R. King, A. Zezas +3
The chandra monitoring observations of The Antennae (NGC 4038/39) have led to the discovery of a variable, luminous, supersoft source (SSS). This source is only detected at energie…
The Time-Variable Ultra-Luminous X-ray Sources of "The Antennae"
G. Fabbiano, A. Zezas, A. R. King +3
We report the first results of the Chandra temporal monitoring of the ultra-luminous X-ray sources (ULXs) in the Antennae galaxies (NGC 4038/39). Observations at four different epo…