Search Publications
Missions
Journals
Publication Years
GMP-selected dual and lensed AGNs: Selection function and classification based on near-IR colors and resolved spectra from VLT/ERIS, Keck/OSIRIS, and LBT/LUCI
Sturm, E.; Marconi, A.; Vignali, C. +44 more
The Gaia Multipeak (GMP) technique can be used to identify large numbers of dual or lensed active galactic nucleus (AGN) candidates at subarcsec separation, allowing us to study both multiple supermassive black holes (SMBHs) in the same galaxy and rare, compact lensed systems. The observed samples can be used to test the predictions of the models …
Are JWST/NIRCam Color Gradients in the Lensed z = 2.3 Dusty Star-forming Galaxy El Anzuelo Due to Central Dust Attenuation or Inside-out Galaxy Growth?
Grogin, Norman A.; Koekemoer, Anton M.; Pirzkal, Nor +25 more
Gradients in the mass-to-light ratio of distant galaxies impede our ability to characterize their size and compactness. The long-wavelength filters of JWST's NIRCam offer a significant step forward. For galaxies at Cosmic Noon (z ~ 2), this regime corresponds to the rest-frame near-infrared, which is less biased toward young stars and captures emi…
Ongoing hierarchical massive cluster assembly: The LISCA II structure in the Perseus complex
Dalessandro, E.; Bellazzini, M.; Sanna, N. +7 more
We report on the identification of a massive (∼105 M⊙) substructured stellar system in the Galactic Perseus complex likely undergoing hierarchical cluster assembly. This system comprises nine star clusters (including the well-known clusters NGC 654 and NGC 663) and an extended and low-density stellar halo. Gaia-DR3 and availa…
Debris disk color with the Hubble Space Telescope
Debes, John H.; Roberge, Aki; Schneider, Glenn +14 more
Context. Multiwavelength scattered light imaging of debris disks may inform dust properties including typical size and mineral composition. Existing studies have investigated a small set of individual systems across a variety of imaging instruments and filters, calling for uniform comparison studies to systematically investigate dust properties. <…
Investigating the M GCS-M h Relation in the Most Massive Galaxies
Harris, William E.; Dornan, Veronika
The relation between the total mass contained in the globular clusters of a galaxy and the mass of its dark-matter halo has been found observationally to be nearly linear over five decades of mass. However, the high-mass end of this relation is not well determined from previous data and shows large scatter. We analyze the globular cluster systems …
WIYN Open Cluster Study. LXXXVII. Hubble Space Telescope Ultraviolet Detection of Hot White Dwarf Companions to Blue Lurkers in M67
Mathieu, Robert D.; Nine, Andrew C.; Gosnell, Natalie M. +1 more
We present the results of our Hubble Space Telescope far-ultraviolet survey of the blue lurkers (BLs) in M67. We find evidence for two white dwarf (WD) companions among the BLs that are indicative of mass transfer from an evolved companion, one in WOCS 14020 and the other in WOCS 3001. The cooling ages of the WDs suggest that mass transfer in thes…
Testing super-eddington accretion on to a supermassive black hole: reverberation mapping of PG 1119+120
Ho, Luis C.; Horne, Keith; Du, Pu +11 more
We measure the black hole mass and investigate the accretion flow around the local (z = 0.0502) quasar PG 1119+120. Spectroscopic monitoring with Calar Alto provides H β lags and linewidths from which we estimate a black hole mass of log (M•/M⊙) = 7.0, uncertain by ~0.4 dex. High cadence photometric monitoring over 2 yr with …
Improvement of Pan-STARRS Photometric Calibration with LAMOST and Gaia
Huang, Bowen; Yuan, Haibo; Xiao, Kai +3 more
In this work, we perform the recalibration of Pan-STARRS1 (PS1) photometry by correcting for position-dependent systematic errors using the spectroscopy-based stellar color regression (SCR) method, the photometry-based SCR method, and the Gaia BP/RP synthetic photometry method. We confirm the significant large-scale and small-scale spatial variati…
Linear Mode Decomposition in Magnetohydrodynamics Revisited
Zank, G. P.; Zhao, L. -L.; Telloni, D. +4 more
Small-amplitude fluctuations in the magnetized solar wind are measured typically by a single spacecraft. In the magnetohydrodynamics (MHD) description, fluctuations are typically expressed in terms of the fundamental modes admitted by the system. An important question is how to resolve an observed set of fluctuations, typically plasma moments such…
A Single Ejection Model of the DART/Dimorphos Debris Trail
Jewitt, David; Kim, Yoonyoung
The collision of the NASA DART spacecraft with asteroid Dimorphos resulted in the formation of a distinctive and long-lived debris trail, formed by the action of solar radiation pressure on ejected particles. This trail briefly displayed a double appearance, which has been interpreted as the result of a double ejection. We present a model that can…