Search Publications
The Radius-Luminosity Relationship Depends on Optical Spectra in Active Galactic Nuclei
Du, Pu; Wang, Jian-Min
The radius-luminosity ({R}{{H}β }{--}{L}5100) relationship of active galactic nuclei (AGNs) established by the reverberation mapping (RM) observations has been widely used as a single-epoch black hole mass estimator in the research of large AGN samples. However, the recent RM campaigns discovered that the AGNs with high-accre…
Improved Dynamical Constraints on the Masses of the Central Black Holes in Nearby Low-mass Early-type Galactic Nuclei and the First Black Hole Determination for NGC 205
Pechetti, Renuka; Neumayer, Nadine; Strader, Jay +17 more
We improve the dynamical black hole (BH) mass estimates in three nearby low-mass early-type galaxies: NGC 205, NGC 5102, and NGC 5206. We use new Hubble Space Telescope (HST)/STIS spectroscopy to fit the star formation histories of the nuclei in these galaxies, and use these measurements to create local color-mass-to-light ratio (M/L) relations. W…
On the Measurement of Fundamental Parameters of White Dwarfs in the Gaia Era
Fontaine, G.; Genest-Beaulieu, C.; Bergeron, P. +5 more
We present a critical review of the determination of fundamental parameters of white dwarfs discovered by the Gaia mission. We first reinterpret color-magnitude and color-color diagrams using photometric and spectroscopic information contained in the Montreal White Dwarf Database (MWDD), combined with synthetic magnitudes calculated from a self-co…
The Evolution and Origin of Ionized Gas Velocity Dispersion from z ∼ 2.6 to z ∼ 0.6 with KMOS3D
Lutz, D.; Wuyts, S.; Förster Schreiber, N. M. +27 more
We present the 0.6 < z < 2.6 evolution of the ionized gas velocity dispersion in 175 star-forming disk galaxies based on data from the full KMOS3D integral field spectroscopic survey. In a forward-modeling Bayesian framework including instrumental effects and beam-smearing, we fit simultaneously the observed galaxy velocity and ve…
K2 Rotation Periods for Low-mass Hyads and a Quantitative Comparison of the Distribution of Slow Rotators in the Hyades and Praesepe
Cargile, P. A.; Agüeros, M. A.; Douglas, S. T. +4 more
We analyze K2 light curves for 132 low-mass (1 M ⊙ ≳ M * ≳ 0.1 M ⊙) members of the 600-800 Myr old Hyades cluster and measure rotation periods ({P}rot}) for 116 of these stars. These include 93 stars with no prior {P}rot} measurements; the total number of Hyads with a known {P}rot} …
Short GRB 160821B: A Reverse Shock, a Refreshed Shock, and a Well-sampled Kilonova
Pian, E.; Greiner, J.; Fruchter, A. S. +31 more
We report our identification of the optical afterglow and host galaxy of the short-duration gamma-ray burst sGRB 160821B. The spectroscopic redshift of the host is z = 0.162, making it one of the lowest redshift short-duration gamma-ray bursts (sGRBs) identified by Swift. Our intensive follow-up campaign using a range of ground-based facilities as…
TESS Hunt for Young and Maturing Exoplanets (THYME): A Planet in the 45 Myr Tucana-Horologium Association
Barclay, Thomas; Vanderburg, Andrew; Hellier, Coel +49 more
Young exoplanets are snapshots of the planetary evolution process. Planets that orbit stars in young associations are particularly important because the age of the planetary system is well constrained. We present the discovery of a transiting planet larger than Neptune but smaller than Saturn in the 45 Myr Tucana-Horologium young moving group. The…
Protoplanetary Disk Rings and Gaps across Ages and Luminosities
Dong, Ruobing; Williams, Jonathan P.; van der Marel, Nienke +2 more
Since the discovery of the multiring structure of the HL Tau disk, ALMA data suggest that the dust continuum emission of many, if not all, protoplanetary disks consists of rings and gaps, no matter their spectral type or age. The origin of these gaps so far remains unclear. We present a sample study of 16 disks with multiple ring-like structures i…
TESS Discovery of an Ultra-short-period Planet around the Nearby M Dwarf LHS 3844
Deming, Drake; Torres, Guillermo; Vanderburg, Andrew +70 more
Data from the newly commissioned Transiting Exoplanet Survey Satellite has revealed a “hot Earth” around LHS 3844, an M dwarf located 15 pc away. The planet has a radius of 1.303+/- 0.022 R ⊕ and orbits the star every 11 hr. Although the existence of an atmosphere around such a strongly irradiated planet is questionable, the star is bri…
ALMA Reveals Potential Evidence for Spiral Arms, Bars, and Rings in High-redshift Submillimeter Galaxies
Smail, I.; Menten, K. M.; Brandt, W. N. +19 more
We present subkiloparsec-scale mapping of the 870 µm ALMA continuum emission in six luminous (L IR ∼ 5 × 1012 L ⊙) submillimeter galaxies (SMGs) from the ALESS survey of the Extended Chandra Deep Field South. Our high-fidelity 0.″07-resolution imaging (∼500 pc) reveals robust evidence for structures with deco…