97 citations · 307 across the 18 of their papers we have counts for
18 papers
Scatter, bias, and chaos of satellite orbits in triaxial dark matter haloes
Barry T. Chiang, Frank C. van den Bosch, Michael A. Keim
The pericentric distances of satellite galaxies govern their tidal stripping, quenching, and survival, yet their orbits are almost universally computed in spherical host haloes, wh…
A Third Galaxy Missing Dark Matter along a Trail of Galaxies in the NGC 1052 Field
Michael A. Keim, Pieter van Dokkum, Zili Shen +2
While most dwarf galaxies are strongly dark matter dominated, two remarkable objects in the NGC 1052 field, DF2 and DF4, appear to lack dark matter. DF2 and DF4 were recently found…
The Infinity Galaxy: a Candidate Direct-Collapse Supermassive Black Hole Between Two Massive, Ringed Nuclei
Pieter van Dokkum, Gabriel Brammer, Josephine F. W. Baggen +3
We report the discovery of an unusual z=1.14 object, dubbed the galaxy, in JWST imaging of the COSMOS field. Its rest-frame near-IR light is dominated by two compact nucle…
Kinematic Confirmation of a Remarkable Linear Trail of Galaxies in the NGC 1052 Field, Consistent with Formation in a High-Speed Bullet Dwarf Collision
Michael A. Keim, Pieter van Dokkum, Zili Shen +6
A unique linear trail of diffuse galaxies was recently identified in the NGC 1052 field. This trail includes the remarkable, ultra-diffuse galaxies DF2 and DF4 which lack dark matt…
The Bullseye: HST, Keck/KCWI, and Dragonfly Characterization of a Giant Nine-Ringed Galaxy
Imad Pasha, Pieter G. van Dokkum, Qing Liu +5
We report the discovery and multiwavelength followup of LEDA 1313424 ("Bullseye"), a collisional ring galaxy (CRG) with nine readily-identified rings -- the most so far reported fo…
Fuzzy Galaxies or Cirrus? Decomposition of Galactic Cirrus in Deep Wide-Field Images
Qing Liu, Roberto Abraham, Peter G. Martin +12
Diffuse Galactic cirrus, or Diffuse Galactic Light (DGL), can be a prominent component in the background of deep wide-field imaging surveys. The DGL provides unique insights into t…
Testing the Bullet Dwarf Collision Scenario in the NGC 1052 Group Through Morphologies and Stellar Populations
Yimeng Tang, Aaron J. Romanowsky, Pieter G. van Dokkum +8
NGC 1052-DF2 and -DF4 are two ultra-diffuse galaxies that have been reported as deficient in dark matter and associated with the same galaxy group. Recent findings suggest that DF2…
First Results from the Dragonfly Ultrawide Survey: the Largest Eleven Quenched Diffuse Dwarf Galaxies in 3100 deg with Spectroscopic Confirmation
Zili Shen, William P. Bowman, Pieter van Dokkum +7
The Dragonfly Telephoto Array employs a unique design to detect very large and diffuse galaxies, which might be missed with conventional telescopes. The Dragonfly Ultrawide Survey…
A Stochastic Gravitational Wave Background in LISA from Unresolved White Dwarf Binaries in the Large Magellanic Cloud
Steven Rieck, Alexander W. Criswell, Valeriya Korol +3
The Laser Interferometer Space Antenna (LISA) is expected to detect a wide variety of gravitational wave sources in the mHz band. Some of these signals will elude individual detect…
A Recipe for Unbiased Background Modeling in Deep Wide-Field Astronomical Images
Qing Liu, Roberto G. Abraham, Peter G. Martin +9
Unbiased sky background modeling is crucial for the analysis of deep wide-field images, but it remains a major challenge in low surface brightness astronomy. Traditional image proc…
A candidate runaway supermassive black hole identified by shocks and star formation in its wake
Pieter van Dokkum, Imad Pasha, Maria Luisa Buzzo +13
The interaction of a runaway supermassive black hole (SMBH) with the circumgalactic medium (CGM) can lead to the formation of a wake of shocked gas and young stars behind it. Here…
The Large Magellanic Cloud Revealed in Gravitational Waves with LISA
Michael A. Keim, Valeriya Korol, Elena M. Rossi
The Laser Interferometer Space Antenna (LISA) will unveil the non-transient gravitational wave sky full of inspiralling stellar-mass compact binaries within the Local Universe. The…
Monochromatic globular clusters as a critical test of formation models for the dark matter deficient galaxies NGC1052-DF2 and NGC1052-DF4
Pieter van Dokkum, Zili Shen, Aaron J. Romanowsky +8
It was recently proposed that the dark matter-deficient ultra-diffuse galaxies DF2 and DF4 in the NGC1052 group could be the products of a "bullet dwarf" collision between two gas-…
A trail of dark matter-free galaxies from a bullet dwarf collision
Pieter van Dokkum, Zili Shen, Michael A. Keim +8
The ultra-diffuse galaxies DF2 and DF4 in the NGC1052 group share several unusual properties: they both have large sizes, rich populations of overluminous and large globular cluste…
A Nascent Tidal Dwarf Galaxy Forming within the Northern HI Streamer of M82
Imad Pasha, Deborah Lokhorst, Pieter G. van Dokkum +12
We identify a 600 pc-wide region of active star formation located within a tidal streamer of M82 via emission ( erg s cm), us…
A Method To Characterize the Wide-Angle Point Spread Function of Astronomical Images
Qing Liu, Roberto Abraham, Colleen Gilhuly +14
Uncertainty in the wide-angle Point Spread Function (PSF) at large angles (tens of arcseconds and beyond) is one of the dominant sources of error in a number of important quantitie…
Tidal Distortions in NGC1052-DF2 and NGC1052-DF4: Independent Evidence for a Lack of Dark Matter
Michael A. Keim, Pieter van Dokkum, Shany Danieli +11
Two ultra diffuse galaxies in the same group, NGC1052-DF2 and NGC1052-DF4, have been found to have little or no dark matter and to host unusually luminous globular cluster populati…
Extragalactic megahertz-peaked spectrum radio sources at milliarcsecond scales
M. A. Keim, J. R. Callingham, H. J. A. Röttgering
Extragalactic peaked-spectrum radio sources are thought to be the progenitors of larger, radio-loud active galactic nuclei (AGN). Synchrotron self-absorption (SSA) has often been i…