Search Publications
Stellar kinematics in the nuclear regions of nearby LIRGs with VLT-SINFONI. Comparison with gas phases and implications for dynamical mass estimations
Colina, L.; Arribas, S.; Pereira-Santaella, M. +3 more
Context. Nearby luminous infrared galaxies (LIRGs) are often considered to be the local counterpart of the star forming galaxy (SFG) population at z > 1. Therefore, local LIRGs are ideal systems with which to perform spatially resolved studies on the physical processes that govern these objects and to validate assumptions made in high-z studies…
Observing correlations between dark matter accretion and galaxy growth - I. Recent star formation activity in isolated Milky Way-mass galaxies
Behroozi, Peter; More, Surhud; O'Donnell, Christine
The correlation between fresh gas accretion on to haloes and galaxy star formation is critical to understanding galaxy formation. Different theoretical models have predicted different correlation strengths between halo accretion rates and galaxy star formation rates, ranging from strong positive correlations to little or no correlation. Here, we p…
Termination of Solar Cycles and Correlated Tropospheric Variability
McIntosh, Scott W.; Leamon, Robert J.; Marsh, Daniel R.
The Sun provides the energy required to sustain life on Earth and drive our planet's atmospheric circulation. However, establishing a solid physical connection between solar and tropospheric variability has posed a considerable challenge. The canon of solar variability is derived from the 400 years of observations that demonstrates the waxing and …
Detection of a Multiphase Intragroup Medium: Results from the COS-IGrM Survey
Heckman, Timothy; Tumlinson, Jason; Borthakur, Sanchayeeta +3 more
We present the results of the Cosmic Origins Spectrograph-Intragroup Medium (COS-IGrM) Survey that used the COS on the Hubble Space Telescope to observe a sample of 18 UV bright quasars, each probing the IGrM of a galaxy group. We detect Lyα, C II, N V, Si II, Si III, and O VI in multiple sightlines. The highest ionization species detected in our …
TIMES. I. A Systematic Observation in Multiple Molecular Lines toward the Orion A and Ophiuchus Clouds
Cho, Jungyeon; Choi, Minho; Choi, Yunhee +16 more
We have used the Taeduk Radio Astronomy Observatory to observe the Orion A and Ophiuchus clouds in the J = 1-0 lines of 13CO, C18O, HCN, HCO+, and N2H+ and the J = 2-1 line of CS. The fully sampled maps with uniform noise levels are used to create moment maps. The variations of the line intens…
Evidence for SO2 latitudinal variations below the clouds of Venus
Bézard, B.; Marcq, E.; Amine, I. +1 more
Context. Sulphur dioxide (SO2) is highly variable above the clouds of Venus, yet no spatial or temporal variability below the clouds had been known until now.
Aims: In order to constrain Venus's atmospheric circulation and chemistry (including possible volcanic outgassing), more accurate SO2 measurements below the clouds…
An active galactic nucleus recognition model based on deep neural network
Hashimoto, Tetsuya; Goto, Tomotsugu; Kim, Seong Jin +21 more
To understand the cosmic accretion history of supermassive black holes, separating the radiation from active galactic nuclei (AGNs) and star-forming galaxies (SFGs) is critical. However, a reliable solution on photometrically recognizing AGNs still remains unsolved. In this work, we present a novel AGN recognition method based on Deep Neural Netwo…
Supermassive Binary Black Holes and the Case of OJ 287
Ciprini, S.; Nowak, M. A.; Komossa, S. +12 more
Supermassive binary black holes (SMBBHs) are laboratories par excellence for relativistic effects, including precession effects in the Kerr metric and the emission of gravitational waves. Binaries form in the course of galaxy mergers, and are a key component in our understanding of galaxy evolution. Dedicated searches for SMBBHs in all stages of t…
PS J1721+8842: a gravitationally lensed dual AGN system at redshift 2.37 with two radio components
Vegetti, S.; McKean, J. P.; Stacey, H. R. +4 more
Dual-Active Galactic Nuclei (AGN) are a natural consequence of the hierarchical structure formation scenario, and can provide an important test of various models for black hole growth. However, due to their rarity and difficulty to find at high redshift, very few confirmed dual-AGN are known at the epoch where galaxy formation peaks. Here we repor…
Discovery of soft and hard X-ray time lags in low-mass AGNs
Stalin, C. S.; De Marco, B.; Alston, W. N. +5 more
The scaling relations between the black hole (BH) mass and soft lag properties for both active galactic nuclei (AGNs) and BH X-ray binaries (BHXRBs) suggest the same underlying physical mechanism at work in accreting BH systems spanning a broad range of mass. However, the low-mass end of AGNs has never been explored in detail. In this work, we ext…