Search Publications
Integral Field Spectroscopy of Fast Outflows in Dwarf Galaxies with AGNs
Veilleux, Sylvain; Liu, Weizhe; Bohn, Thomas +4 more
Feedback likely plays a vital role in the formation of dwarf galaxies. While stellar processes have long been considered the main source of feedback, recent studies have revealed tantalizing signs of active galactic nucleus (AGN) feedback in dwarf galaxies. In this paper, we report the results from an integral field spectroscopic study of a sample…
Distances and Statistics of Local Molecular Clouds in the First Galactic Quadrant
Su, Yang; Yan, Qing-Zeng; Sun, Yan +2 more
We present an analysis of local molecular clouds ( $-6\lt {V}_{\mathrm{LSR}}\lt 30$ km s-1, i.e., <1.5 kpc) in the first Galactic quadrant ( $25\buildrel{\circ}\over{.} 8\lt l\lt 49\buildrel{\circ}\over{.} 7$ and $| b| \lt 5^\circ $ ), a pilot region of the Milky Way Imaging Scroll Painting (MWISP) CO survey. Using the Spectral Clust…
Search for Optically Dark Infrared Galaxies without Counterparts of Subaru Hyper Suprime-Cam in the AKARI North Ecliptic Pole Wide Survey Field
Momose, Rieko; Hashimoto, Tetsuya; Goto, Tomotsugu +25 more
We present the physical properties of AKARI sources without optical counterparts in optical images from the Hyper Suprime-Cam (HSC) on the Subaru telescope. Using the AKARI infrared (IR) source catalog and HSC optical catalog, we select 583 objects that do not have HSC counterparts in the AKARI North Ecliptic Pole wide survey field (∼5 deg2
The Surprisingly Low Carbon Mass in the Debris Disk around HD 32297
Henning, Thomas; Hughes, A. Meredith; Redfield, Seth +18 more
Gas has been detected in a number of debris disks. It is likely secondary, I.e., produced by colliding solids. Here, we report ALMA Band 8 observations of neutral carbon in the CO-rich debris disk around the 15-30 Myr old A-type star HD 32297. We find that C0 is located in a ring at ∼110 au with an FWHM of ∼80 au and has a mass of (3.5 …
A Multiwavelength Analysis of the Faint Radio Sky (COSMOS-XS): the Nature of the Ultra-faint Radio Population
Smolčić, V.; Walter, F.; Riechers, D. A. +7 more
Ultra-deep radio surveys are an invaluable probe of dust-obscured star formation, but require a clear understanding of the relative contribution from radio active galactic nuclei (AGNs) to be used to their fullest potential. We study the composition of the µJy radio population detected in the Karl G. Jansky Very Large Array COSMOS-XS survey …
Constraints on the Physical Properties of GW190814 through Simulations Based on DECam Follow-up Observations by the Dark Energy Survey
Bechtol, K.; Smith, M.; Lidman, C. +100 more
On 2019 August 14, the LIGO and Virgo Collaborations detected gravitational waves from a black hole and a 2.6 solar mass compact object, possibly the first neutron star-black hole merger. In search of an optical counterpart, the Dark Energy Survey (DES) obtained deep imaging of the entire 90% confidence level localization area with Blanco/DECam 0,…
Modeling Unresolved Binaries of Open Clusters in the Color-Magnitude Diagram. I. Method and Application of NGC 3532
Chen, Li; Li, Zhao-Zhou; Zhong, Jing +3 more
The binary properties of open clusters place crucial constraints on star formation theory and clusters' dynamical evolution. We develop a comprehensive approach that models the color-magnitude diagram (CMD) of the cluster members as a mixture of single stars and photometric unresolved binaries. This method enables us to infer the binary properties…
FLEET: A Redshift-agnostic Machine Learning Pipeline to Rapidly Identify Hydrogen-poor Superluminous Supernovae
Villar, V. Ashley; Berger, Edo; Nicholl, Matt +4 more
Over the past decade wide-field optical time-domain surveys have increased the discovery rate of transients to the point that ≲10% are being spectroscopically classified. Despite this, these surveys have enabled the discovery of new and rare types of transients, most notably the class of hydrogen-poor superluminous supernovae (SLSN-I), with about …
Swift Monitoring of M51: A 38 day Superorbital Period for the Pulsar ULX7 and a New Transient Ultraluminous X-Ray Source
Fürst, Felix; Walton, Dominic J.; Stern, Daniel +6 more
We present the results from a monitoring campaign made with the Neil Gehrels Swift Observatory of the M51 galaxies, which contain several variable ultraluminous X-ray sources (ULXs). The ongoing campaign started in 2018 May, and we report here on ∼1.5 yr of observations. The campaign, which consists of 106 observations, has a typical cadence of 3-…
Mass Functions of Giant Molecular Clouds and Young Star Clusters in Six Nearby Galaxies
Fall, S. Michael; Chandar, Rupali; Mok, Angus
We compare the mass functions of young star clusters (ages ≤ 10 Myr) and giant molecular clouds (GMCs) in six galaxies that cover a large range in mass, metallicity, and star formation rate (LMC, M83, M51, NGC 3627, the Antennae, and NGC 3256). We perform maximum-likelihood fits of the Schechter function, $\psi (M)\,={dN}/{dM}\propto {M}^{\beta }\…