Search Publications
Circumnuclear Multiphase Gas in the Circinus Galaxy. II. The Molecular and Atomic Obscuring Structures Revealed with ALMA
Kohno, Kotaro; Wada, Keiichi; Izumi, Takuma +2 more
We used the Atacama Large Millimeter/Submillimeter Array (ALMA) to map the CO(3-2) and [C I](1-0) lines, as well as their underlying continuum emission, from the central ∼200 pc region of the Circinus galaxy that hosts the nearest type 2 Seyfert-class active galactic nucleus (AGN), with a spatial resolution of ∼6-15 pc. The lines and continuum-emi…
Demographics of Star-forming Galaxies since z ∼ 2.5. I. The UVJ Diagram in CANDELS
Finkelstein, Steven L.; Barro, Guillermo; Pérez-González, Pablo G. +41 more
This is the first in a series of papers examining the demographics of star-forming (SF) galaxies at 0.2 < z < 2.5 in CANDELS. We study 9100 galaxies from GOODS-S and UDS, having published values of redshifts, masses, star formation rates (SFRs), and dust attenuation (A V ) derived from UV-optical spectral energy distribution fitt…
An Enigmatic Population of Luminous Globular Clusters in a Galaxy Lacking Dark Matter
Mowla, Lamiya; van Dokkum, Pieter; Romanowsky, Aaron J. +10 more
We recently found an ultra diffuse galaxy (UDG) with a half-light radius of R e = 2.2 kpc and little or no dark matter. The total mass of NGC1052-DF2 was measured from the radial velocities of bright compact objects that are associated with the galaxy. Here, we analyze these objects using a combination of Hubble Space Telescope (HST) …
ASASSN-18ey: The Rise of a New Black Hole X-Ray Binary
Kochanek, C. S.; Rest, A.; Stalder, B. +24 more
We present the discovery of ASASSN-18ey (MAXI J1820+070), a new black hole low-mass X-ray binary (LMXB) discovered by the All-Sky Automated Survey for SuperNovae (ASAS-SN). A week after ASAS-SN discovered ASASSN-18ey as an optical transient, it was detected as an X-ray transient by MAXI/GCS. Here, we analyze ASAS-SN and Asteroid Terrestrial-impact…
Genesis and Impulsive Evolution of the 2017 September 10 Coronal Mass Ejection
Veronig, Astrid M.; Temmer, Manuela; Dissauer, Karin +7 more
The X8.2 event of 2017 September 10 provides unique observations to study the genesis, magnetic morphology, and impulsive dynamics of a very fast coronal mass ejection (CME). Combining GOES-16/SUVI and SDO/AIA EUV imagery, we identify a hot (T ≈ 10-15 MK) bright rim around a quickly expanding cavity, embedded inside a much larger CME shell (T ≈ 1-…
Forming Super Star Clusters in the Central Starburst of NGC 253
Meier, David S.; Ott, Jürgen; Bolatto, Alberto D. +12 more
NGC 253 hosts the nearest nuclear starburst. Previous observations show a region rich in molecular gas, with dense clouds associated with recent star formation. We used the Atacama Large Submillimeter/Millimeter Array (ALMA) to image the 350 GHz dust continuum and molecular line emission from this region at 2 pc resolution. Our observations reveal…
The Diversity of Kilonova Emission in Short Gamma-Ray Bursts
Covino, S.; Lyman, J. D.; Fruchter, A. S. +10 more
The historic first joint detection of both gravitational-wave and electromagnetic emission from a binary neutron star merger cemented the association between short gamma-ray bursts (SGRBs) and compact object mergers, as well as providing a well-sampled multi-wavelength light curve of a radioactive kilonova (KN) for the first time. Here, we compare…
Fast and Slow Paths to Quiescence: Ages and Sizes of 400 Quiescent Galaxies from the LEGA-C Survey
Bell, Eric F.; Franx, Marijn; Muzzin, Adam +11 more
We analyze the stellar age indicators (D n 4000 and EW(Hδ)) and sizes of 467 quiescent galaxies with M * ≥ 1010 M ⊙ at z ∼ 0.7 drawn from DR2 of the LEGA-C survey. Interpreting index variations in terms of equivalent single stellar population age, we find that the median stellar population is younger for…
On the Gas Content and Efficiency of AGN Feedback in Low-redshift Quasars
Ho, Luis C.; Shangguan, Jinyi; Xie, Yanxia
The interstellar medium is crucial to understanding the physics of active galaxies and the coevolution between supermassive black holes and their host galaxies. However, direct gas measurements are limited by sensitivity and other uncertainties. Dust provides an efficient indirect probe of the total gas. We apply this technique to a large sample o…
Homogeneous Analysis of the Dust Morphology of Transition Disks Observed with ALMA: Investigating Dust Trapping and the Origin of the Cavities
van der Plas, G.; Pascucci, I.; Garufi, A. +11 more
We analyze the dust morphology of 29 transition disks (TDs) observed with Atacama Large (sub-)Millimeter Array (ALMA) at (sub-)millimeter emission. We perform the analysis in the visibility plane to characterize the total flux, cavity size, and shape of the ring-like structure. First, we found that the M dust-M ⋆ relation is …