Search Publications
Protocluster detection in simulations of HSC-SSP and the 10-yr LSST forecast, using PCcones
Overzier, Roderik A.; Sodré, Laerte, Jr.; Araya-Araya, Pablo +2 more
The progenitors of present-day galaxy clusters give important clues about the evolution of the large-scale structure, cosmic mass assembly, and galaxy evolution. Simulations are a major tool for these studies since they are used to interpret observations. In this work, we introduce a set of 'protocluster-light-cones', dubbed PCcones. They are mock…
New Results on the Direct Observations of Thermal Radio Emission from a Solar Coronal Mass Ejection
Ramesh, R.; Kumari, A.; Kathiravan, C. +2 more
We report observations of thermal emission from the frontal structure of a coronal mass ejection (CME) using data obtained with the Gauribidanur RAdioheliograPH simultaneously at 80 and 53 MHz on May 1, 2016. The CME was due to activity on the far side of the Sun, but near its limb. No nonthermal radio burst activity was noticed. This provided an …
Local topography effects on the surface temperatures on Mars - Application to the case of Recurring Slope Lineae (RSL)
Quantin-Nataf, Cathy; Leyrat, Cédric; Millot, Cédric +1 more
Recurring Slope Lineae (RSL) are dark linear recurrent features which incrementally lengthen and fade each year on Martian slopes. Their activity during warmest seasons rises the question of modern martian water related process. To investigate this question, this study focuses on the thermal context of slopes hosting RSL. The paper presents a nume…
Superresolution Reconstruction of Severely Undersampled Point-spread Functions Using Point-source Stacking and Deconvolution
Zemcov, Michael; Symons, Teresa; Bock, James +4 more
Point-spread function (PSF) estimation in spatially undersampled images is challenging because large pixels average fine-scale spatial information. This is problematic when fine-resolution details are necessary, as in optimal photometry where knowledge of the illumination pattern beyond the native spatial resolution of the image may be required. H…
Implications of triangular features in the Gaia skymap for the Caustic Ring Model of the Milky Way halo
Gonzalez, Anthony H.; Chakrabarty, Sankha S.; Sikivie, Pierre +1 more
The Gaia map of the Milky Way reveals a pair of triangular features at nearly symmetric locations on opposite sides of the Galactic Center. In this paper we explore the implications of these features assuming they are manifestations of a caustic ring in the dark matter distribution of the Milky Way halo. The existence of a series of such rings is …
HST PanCET program: non-detection of atmospheric escape in the warm Saturn-sized planet WASP-29 b
Sanz-Forcada, J.; Ehrenreich, D.; Lecavelier des Etangs, A. +10 more
Short-period gas giant exoplanets are susceptible to intense atmospheric escape due to their large scale heights and strong high-energy irradiation. This process is thought to occur ubiquitously, but to date we have only detected direct evidence of atmospheric escape in hot Jupiters and warm Neptunes. The latter planets are particularly more sensi…
14 Her: A Likely Case of Planet-Planet Scattering
Gelino, Christopher R.; Faherty, Jacqueline K.; Bardalez Gagliuffi, Daniella C. +4 more
In this Letter, we measure the full orbital architecture of the two-planet system around the nearby K0 dwarf 14 Herculis. 14 Her (HD 145675, HIP 79248) is a middle-aged ( ${4.6}_{-1.3}^{+3.8}$ Gyr) K0 star with two eccentric giant planets identified in the literature from radial velocity (RV) variability and long-term trends. Using archival RV dat…
Sublimation of Laboratory Ices Millimeter/Submillimeter Experiment (SubLIME): Structure-specific Identifications of Products from UV-photolyzed Methanol Ice
Gerakines, P. A.; Milam, S. N.; Widicus Weaver, S. L. +1 more
Submillimeter/far-IR spectroscopy was used to detect and quantify organic molecules sublimated after the ultraviolet photolysis (at 12 K) and warm-up (up to 300 K) of a methanol (CH3OH) ice sample. Eleven sublimated photoproducts were uniquely identified: carbon monoxide (CO), formaldehyde (H2CO), ketene (C2H2…
Detection of H2O and OH+ in z > 3 hot dust-obscured galaxies
Knudsen, K. K.; Aalto, S.; Falstad, N. +3 more
Aims: In this paper we present the detection of H2O and OH+ emission in z > 3 hot dust-obscured galaxies (Hot DOGs).
Methods: Using ALMA Band-6 observations of two Hot DOGs, we detected H2O(202 - 111) in W0149+2350, and H2O(312 - 303) and the multi…
HO Puppis: Not a Be Star, but a Newly Confirmed IW And-type Star
Duev, Dmitry A.; Riddle, Reed; Mróz, Przemek +19 more
HO Puppis (HO Pup) was considered as a Be-star candidate based on its γ Cassiopeiae-type light curve, but lacked spectroscopic confirmation. Using distance measured from Gaia Data Release 2 and the spectral-energy-distribution fit on broadband photometry, the Be-star nature of HO Pup is ruled out. Furthermore, based on the 28,700 photometric data …