Search Publications
Revisiting the dust destruction efficiency of supernovae
De Looze, I.; Gomez, H. L.; Barlow, M. J. +3 more
Dust destruction by supernovae is one of the main processes removing dust from the interstellar medium (ISM). Estimates of the efficiency of this process, both theoretical and observational, typically assume a shock propagating into a homogeneous medium, whereas the ISM possesses significant substructure in reality. We self-consistently model the …
Measuring the fine-structure constant on a white dwarf surface; a detailed analysis of Fe V absorption in G191-B2B
Barstow, M. A.; Webb, J. K.; Carswell, R. F. +12 more
The gravitational potential ϕ = GM/Rc2 at the surface of the white dwarf G191-B2B is 10 000 times stronger than that at the Earth's surface. Numerous photospheric absorption features are detected, making this a suitable environment to test theories in which the fundamental constants depend on gravity. We have measured the fine-structure…
Transiting Exoplanet Monitoring Project (TEMP). VI. The Homogeneous Refinement of System Parameters for 39 Transiting Hot Jupiters with 127 New Light Curves
Rice, Malena; Wang, Songhu; Zhou, Xu +11 more
We present 127 new transit light curves for 39 hot Jupiter systems, obtained over the span of 5 yr by two ground-based telescopes. A homogeneous analysis of these newly collected light curves together with archived spectroscopic, photometric, and Doppler velocimetric data using EXOFASTv2 leads to a significant improvement in the physical and orbit…
Dissecting the stellar content of Leo I: a dwarf irregular caught in transition
Monelli, M.; Cassisi, S.; Gallart, C. +7 more
Leo I is considered one of the youngest dwarf spheroidals (dSph) in the Local Group. Its isolation, extended star formation history (SFH), and recent perigalacticon passage (∼1 Gyr ago) make Leo I one of the most interesting nearby stellar systems. Here, we analyse deep photometric Hubble Space Telescope data via colour-magnitude diagram fitting t…
Molecular Gas Filaments and Fallback in the Ram Pressure Stripped Coma Spiral NGC 4921
Tonnesen, S.; Smith, R.; Cramer, W. J. +6 more
We investigate the effects of ram pressure on the molecular interstellar medium (ISM) in the disk of the Coma cluster galaxy NGC 4921 via high-resolution CO observations. We present 6″ resolution CARMA CO(1-0) observations of the full disk, and 0"4 resolution Atacama Large Millimeter/submillimeter Array CO(2-1) observations of the leading quadrant…
Precise Transit and Radial-velocity Characterization of a Resonant Pair: The Warm Jupiter TOI-216c and Eccentric Warm Neptune TOI-216b
Trifonov, Trifon; Henning, Thomas; Butler, R. Paul +53 more
TOI-216 hosts a pair of warm, large exoplanets discovered by the TESS mission. These planets were found to be in or near the 2:1 resonance, and both of them exhibit transit timing variations (TTVs). Precise characterization of the planets' masses and radii, orbital properties, and resonant behavior can test theories for the origins of planets orbi…
The Sample of Red Supergiants in 12 Low-mass Galaxies of the Local Group
Yang, Ming; Ren, Yi; Jiang, Biwei +2 more
This work establishes the most complete sample of red supergiants (RSGs) in 12 low-mass galaxies (WLM, IC 10, NGC 147, NGC 185, IC 1613, Leo A, Sextans B, Sextans A, NGC 6822, Pegasus Dwarf, SMC, and LMC) of the Local Group, which forms a solid basis to study the properties of RSGs as well as the star formation rate and initial mass function of th…
Photometric selection and redshifts for quasars in the Kilo-Degree Survey Data Release 4
Heymans, C.; Hildebrandt, H.; Erben, T. +10 more
We present a catalog of quasars with their corresponding redshifts derived from the photometric Kilo-Degree Survey (KiDS) Data Release 4. We achieved it by training machine learning (ML) models, using optical ugri and near-infrared ZYJHKs bands, on objects known from Sloan Digital Sky Survey (SDSS) spectroscopy. We define inference subs…
Vertical Phase Mixing across the Galactic Disk
Li, Zhao-Yu
By combining the Large Sky Area Multi-object Fiber Spectroscopic Telescope and Gaia data, we investigate the vertical phase mixing across the Galactic disk. Our results confirm the existence of phase space snail shells (or phase spirals) from 6-12 kpc. We find that grouping stars by the guiding radius (Rg), instead of the present radius…
MPS-ATLAS: A fast all-in-one code for synthesising stellar spectra
Solanki, S. K.; Shapiro, A. I.; Tagirov, R. V. +6 more
Context. Stellar spectral synthesis is essential for various applications, ranging from determining stellar parameters to comprehensive stellar variability calculations. New observational resources as well as advanced stellar atmosphere modelling, taking three dimensional effects from radiative magnetohydrodynamics calculations into account, requi…