Search Publications
The Relation between Globular Cluster Systems and Supermassive Black Holes in Spiral Galaxies. III. The Link to the M •-M * Correlation
González-Lópezlira, Rosa A.; Gwyn, Stephen; Loinard, Laurent +6 more
We continue to explore the relationship between the total number of globular clusters (GCs), N GC, and the central black hole mass, M •, in spiral galaxies. We present here results for the Sab galaxies NGC 3368, NGC 4736 (M94), and NGC 4826 (M64), and the Sm galaxy NGC 4395. The GC candidate selection is based on the (u* - $i…
Gaia 0007-1605: An Old Triple System with an Inner Brown Dwarf-White Dwarf Binary and an Outer White Dwarf Companion
Rebassa-Mansergas, Alberto; Raddi, Roberto; Torres, Santiago +5 more
We identify Gaia 0007-1605 A,C as the first inner brown dwarf-white dwarf binary of a hierarchical triple system in which the outer component is another white dwarf (Gaia 0007-1605 B). From optical/near-infrared spectroscopy obtained at the Very Large Telescope with the X-Shooter instrument and/or from Gaia photometry plus spectral energy distribu…
Determining Star Formation Rates of Active Galactic Nucleus Host Galaxies Based on SED Fitting with Submillimeter Data
Jadhav, Yashashree; Hwang, Ho Seong; Luo, Rongxin +9 more
We present the star formation rate (SFR) measurements based on the spectral energy distribution (SED) analysis with new submillimeter fluxes combined with archival multiwavelength data for a sample of 52 active galactic nucleus (AGN) host galaxies at z < 0.2. We carried out submillimeter observations using the SCUBA-2 camera at the James Clerk …
A Single-lined Spectroscopic Binary Companion to an Active and Deep Contact Binary in a Quintuple Stellar System
Li, P.; Qian, S. -B.; Liao, W. -P. +5 more
V410 Aur is a known deep and low-mass-ratio contact binary with a spectroscopically tertiary component and a visual companion. However, the physical and orbital properties of the tertiary are unknown. We constructed (O - C) curve with 117 new eclipse times and those collected from the literature, which shows a cyclical variation with a period of 2…
Warped Disk Galaxies. I. Linking U-type Warps in Groups/Clusters to Jellyfish Galaxies
Yoon, Suk-Jin; Paudel, Sanjaya; Zee, Woong-Bae G. +3 more
Warped disk galaxies are classified into two morphologies: S and U types. Conventional theories routinely attribute both types to galactic tidal interaction and/or gas accretion, but reproducing U types in simulations is extremely challenging. Here we investigate whether both types are governed by the same mechanisms using the most extensive sampl…
Kinematics and Feedback in H II Regions in the Dwarf Starburst Galaxy IC 10
Do, Tuan; Sandstrom, Karin; Armus, Lee +8 more
We present a survey of the central region of the nearest starburst galaxy, IC 10, using the W. M. Keck Observatory Keck Cosmic Web Imager (KCWI) at high spectral and spatial resolution. We map the central starburst of IC 10 to sample the kinematic and ionization properties of the individual star-forming regions. Using the low spectral resolution m…
Evolution of an Emerging Anti-Hale Region and its Associated Eruptive Solar Flares in NOAA AR 12882
Xu, Zhe; Xue, Zhike; Yan, Xiaoli +3 more
Solar active regions that violate the Hale-Nicholson rule are rare, but once formed, they tend to be flare-productive. In this letter, we investigated the evolution of an anti-Hale region newly emerging from the active region AR 12882 with a regular Hale distribution. The entire active region became very active, producing two eruptive flares withi…
Disks in Nearby Young Stellar Associations Found Via Virtual Reality
Debes, John H.; Kuchner, Marc J.; Gagné, Jonathan +25 more
The Disk Detective citizen science project recently released a new catalog of disk candidates found by visual inspection of images from NASA's Wide-field Infrared Survey Explorer mission and other surveys. We applied this new catalog of well-vetted disk candidates to search for new members of nearby young stellar associations (YSAs) using a novel …
Light Deflection under the Gravitational Field of Jupiter-Testing General Relativity
Xu, Ye; Hao, Chaojie; Li, Yingjie +6 more
We measured the relative positions between two pairs of compact extragalactic sources (CESs), J1925-2219 and J1923-2104 (C1-C2) and J1925-2219 and J1928-2035 (C1-C3), on 2020 October 23-25 and 2021 February 5 (totaling four epochs), respectively, using the Very Long Baseline Array at 15 GHz. Accounting for the deflection angle dominated by Jupiter…
Kepler and TESS Observations of PG 1159-035
Oliveira da Rosa, Gabriela; Kepler, S. O.; Córsico, Alejandro H. +11 more
PG 1159-035 is the prototype of the PG 1159 hot (pre-)white dwarf pulsators. This important object was observed during the Kepler satellite K2 mission for 69 days in 59 s cadence mode and by the TESS satellite for 25 days in 20 s cadence mode. We present a detailed asteroseismic analysis of those data. We identify a total of 107 frequencies repres…