Search Publications
VLA Legacy Survey of Molecular Gas in Massive Star-forming Galaxies at High Redshift
Ivison, R. J.; Smail, Ian; Jiménez-Andrade, E. F. +18 more
We present the initial results of an ongoing survey with the Karl G. Jansky Very Large Array targeting the CO(J = 1-0) transition in a sample of 30 submillimeter-selected, dusty star-forming galaxies (SFGs) at z = 2-5 with existing mid-J CO detections from the Atacama Large Millimeter/submillimeter Array and NOrthern Extended Millimeter Array, of …
Detection of Carbon Monoxide in the Atmosphere of WASP-39b Applying Standard Cross-correlation Techniques to JWST NIRSpec G395H Data
Stevenson, Kevin B.; Kirk, James; López-Morales, Mercedes +30 more
Carbon monoxide was recently reported in the atmosphere of the hot Jupiter WASP-39b using the NIRSpec PRISM transit observation of this planet, collected as part of the JWST Transiting Exoplanet Community Early Release Science Program. This detection, however, could not be confidently confirmed in the initial analysis of the higher-resolution obse…
Analytical weak-lensing shear responses of galaxy properties and galaxy detection
Mandelbaum, Rachel; Li, Xiangchong
Shear estimation bias from galaxy detection and blending identification is now recognized as an issue for ongoing and future weak-lensing surveys. Currently, the empirical approach to correcting for this bias involves numerically shearing every observed galaxy and rerunning the detection and selection process. In this work, we provide an analytica…
A Black Hole Kicked at Birth: MAXI J1305-704
Dotter, Aaron; Zapartas, Emmanouil; Andrews, Jeff J. +12 more
When a compact object is formed in a binary, any mass lost during core collapse will impart a kick on the binary's center of mass. Asymmetries in this mass loss or neutrino emission would impart an additional natal kick on the remnant black hole or neutron star, whether it was formed in a binary or in isolation. While it is well established that n…
The role of stellar expansion on the formation of gravitational wave sources
Shenar, T.; Belczynski, K.; Romagnolo, A. +3 more
Massive stars are the progenitors of black holes and neutron stars, the mergers of which can be detected with gravitational waves (GW). The expansion of massive stars is one of the key factors affecting their evolution in close binary systems, but it remains subject to large uncertainties in stellar astrophysics. For population studies and predict…
In Situ Star Formation in Accretion Disks and Explanation of Correlation between the Black Hole Mass and Metallicity in Active Galactic Nuclei
Wu, Qingwen; Fan, Xiao
Recent observations show that the metallicity Z BLR of the broad-line region (BLR) in active galactic nuclei (AGNs) is solar to supersolar, which is positively correlated with the mass of supermassive black holes (M BH) and does not evolve with the redshift up to z ~ 7. We revisit the M BH-Z BLR correlat…
Investigating the visible phase-curve variability of 55 Cnc e★
Alonso, R.; Deleuil, M.; Erikson, A. +87 more
Context. 55 Cnc e is an ultra-short period super-Earth transiting a Sun-like star. Previous observations in the optical range detected a time-variable flux modulation that is phased with the planetary orbital period, whose amplitude is too large to be explained by reflected light and thermal emission alone.
Aims: The goal of the study is to i…
A Spatially Resolved Analysis of Star Formation Burstiness by Comparing UV and Hα in Galaxies at z ∼ 1 with UVCANDELS
Arrabal Haro, Pablo; Lucas, Ray A.; Ravindranath, Swara +30 more
The UltraViolet imaging of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey Fields (UVCANDELS) program provides Hubble Space Telescope (HST)/UVIS F275W imaging for four CANDELS fields. We combine this UV imaging with existing HST/near-IR grism spectroscopy from 3D-HST+AGHAST to directly compare the resolved rest-frame UV and Hα e…
Features of Gaia DR3 spectroscopic binaries I. Tidal circularization of main-sequence stars
Faigler, Simchon; Mazeh, Tsevi; Bashi, Dolev
Previous studies pointed out that many observed samples of short-period binaries display a cut-off period, Pcut, such that almost all binaries with periods shorter than Pcut have circular orbits. This feature is probably due to long-term circularization processes induced by tidal interaction between the two stars of each bina…
Exploring Thousands of Nearby Hierarchical Systems with Gaia and Speckle Interferometry
Tokovinin, Andrei
There should be about 10,000 stellar hierarchical systems within 100 pc with primary stars more massive than 0.5 M ⊙, and a similar amount of less-massive hierarchies. A list of 8000 candidate multiples is derived from wide binaries found in the Gaia Catalog of Nearby Stars where one or both components have excessive astrometric noise o…