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Mid- and Far-infrared Color-Color Relations within Local Galaxies
Calzetti, Daniela; Heyer, Mark; Gregg, Benjamin
We present an extensive archival analysis of a sample of local galaxies, combining multiwavelength data from GALEX, Spitzer, and Herschel to investigate "blue-side" mid-infrared (MIR) and "red-side" far-infrared (FIR) color-color correlations within the observed infrared spectral energy distributions. Our sample largely consists of the KINGFISH ga…
Molecular and Atomic Clouds Associated with the Gamma-Ray Supernova Remnant Puppis A
Rowell, G.; Fukui, Y.; Reynoso, E. M. +3 more
We have carried out a study of the interstellar medium (ISM) toward the shell-like supernova remnant (SNR) Puppis A using NANTEN CO and ATCA H I data. We synthesized a comprehensive picture of the SNR radiation by combining the ISM data with the gamma-ray and X-ray distributions. The ISM, both atomic and molecular gas, is dense and highly clumpy, …
High-resolution X-ray study of supernova remnant J0453.6-6829 with unusually high forbidden-to-resonance ratio
Uchida, Hiroyuki; Tsuru, Takeshi Go; Tanaka, Takaaki +3 more
Recent high-resolution X-ray spectroscopy has revealed that several supernova remnants (SNRs) in the Large Magellanic Cloud (LMC) show unusually high forbidden-to-resonance (f/r) line ratios. While their origin is still uncertain and debated, most of these SNRs have asymmetric morphology and/or show evidence of interaction with dense material, whi…
The Gaia-ESO survey: A spectroscopic study of the young open cluster NGC 3293
Gilmore, G.; Gosset, E.; Herrero, A. +24 more
We present a spectroscopic analysis of the GIRAFFE and UVES data collected by the Gaia-ESO survey for the young open cluster NGC 3293. Archive spectra from the same instruments obtained in the framework of the `VLT-FLAMES survey of massive stars' are also analysed. Atmospheric parameters, non-local thermodynamic equilibrium (LTE) chemical abundanc…
Hubble Space Telescope Observations of Active Asteroid P/2020 O1 (Lemmon-PANSTARRS)
Mutchler, Max; Jewitt, David; Agarwal, Jessica +3 more
We present Hubble Space Telescope observations of active asteroid P/2020 O1 taken to examine its development for a year after perihelion. We find that the mass loss peaks at ≲1 kg s-1 in 2020 August and then declines to nearly zero over four months. Long-duration mass loss (~180 days) is consistent with a sublimation origin, indicating …
Albedo variegation on Comet 67P/Churyumov-Gerasimenko
Buratti, Bonnie J.; Hicks, Michael D.; Davidsson, Björn J. R.
We here study the level of albedo variegation on the nucleus of Comet 67P/Churyumov-Gerasimenko. This is done by fitting the parameters of a standard photometric phase function model to disc-average radiance factor data in images acquired by the Rosetta/OSIRIS Narrow Angle Camera in the orange filter. Local discrepancies between the observed radia…
Impact of bar resonances in the velocity-space distribution of the solar neighbourhood stars in a self-consistent N-body Galactic disc simulation
Fujii, Michiko S.; Portegies Zwart, Simon; Baba, Junichi +3 more
The velocity-space distribution of the solar neighbourhood stars shows complex substructures. Most of the previous studies use static potentials to investigate their origins. Instead we use a self-consistent N-body model of the Milky Way, whose potential is asymmetric and evolves with time. In this paper, we quantitatively evaluate the similaritie…
An X-ray fading, UV brightening QSO at z ≈ 6
Bauer, F. E.; Brandt, W. N.; Vignali, C. +13 more
Explaining the existence of super massive black holes (SMBHs) with MBH ≳ 108 M⊙ at z ≳ 6 is a persistent challenge to modern astrophysics. Multiwavelength observations of z ≳ 6 quasi-stellar objects (QSOs) reveal that, on average, their accretion physics is similar to that of their counterparts at lower redshift. H…
Redshift space three-point correlation function of IGM at z < 0.48
Srianand, Raghunathan; Gaikwad, Prakash; Maitra, Soumak +1 more
Ly α forest decomposed into Voigt profile components allows us to study clustering properties of the intergalactic-medium and its dependence on various physical quantities. Here, we report the first detections of probability excess of low-z (i.e z < 0.48) Ly α absorber triplets over redshift-space scale of r∥ ≤ 8 pMpc (Mpc in physica…
An old warm Jupiter orbiting the metal-poor G-dwarf TOI-5542
Jordán, Andrés; Stassun, Keivan G.; Worters, Hannah L. +30 more
We report the discovery of a 1.32−0.10+0.10 MJup planet orbiting on a 75.12 day period around the G3V 10.8−3.6+2.1 Gyr old star TOI-5542 (TIC 466206508; TYC 9086-1210-1). The planet was first detected by the Transiting Exoplanet Survey Satellite (TESS) as a single transit event in TESS Sector …