Search Publications
Stellar associations powering H II regions - I. Defining an evolutionary sequence
Kruijssen, J. M. Diederik; Leroy, Adam K.; Rosolowsky, Erik +30 more
Connecting the gas in H II regions to the underlying source of the ionizing radiation can help us constrain the physical processes of stellar feedback and how H II regions evolve over time. With PHANGS-MUSE, we detect nearly 24 000 H II regions across 19 galaxies and measure the physical properties of the ionized gas (e.g. metallicity, ionization …
The late time optical evolution of twelve core-collapse supernovae: detection of normal stellar winds
Kochanek, C. S.; Neustadt, J. M. M.; Rizzo Smith, M.
We analyse the late time evolution of 12 supernovae (SNe) occurring over the last ~41 yr, including nine Type IIP/L, two IIb, and one Ib/c, using UBVR optical data from the Large Binocular Telescope (LBT) and difference imaging. We see late time (5-42 yr) emission from nine of the eleven Type II SNe (eight Type IIP/L, one IIb). We consider radioac…
UV and Hα HST Observations of Six GASP Jellyfish Galaxies
Scarlata, Claudia; Mingozzi, Matilde; Calzetti, Daniela +17 more
Star-forming, Hα-emitting clumps are found embedded in the gaseous tails of galaxies undergoing intense ram pressure stripping in galaxy clusters, so-called jellyfish galaxies. These clumps offer a unique opportunity to study star formation under extreme conditions, in the absence of an underlying disk and embedded within the hot intracluster medi…
The SOFIA Massive (SOMA) Star Formation Survey. IV. Isolated Protostars
Law, Chi-Yan; Telkamp, Zoie; Yang, Yao-Lun +13 more
We present ~10-40 µm SOFIA-FORCAST images of 11 isolated protostars as part of the SOFIA Massive (SOMA) Star Formation Survey, with this morphological classification based on 37 µm imaging. We develop an automated method to define source aperture size using the gradient of its background-subtracted enclosed flux and apply this to build…
White dwarf spectral type-temperature distribution from Gaia DR3 and the Virtual Observatory
Solano, E.; Rebassa-Mansergas, A.; Raddi, R. +6 more
Context. The characterization of white dwarf atmospheres is crucial for accurately deriving stellar parameters such as effective temperature, mass, and age. However, the inclusion of physical processes such as convective mixing and convective dilution in current white dwarf atmospheric models offers a prediction of the spectral evolution of these …
Future Exploration of the Outer Heliosphere and Very Local Interstellar Medium by Interstellar Probe
Wurz, P.; Krimigis, S. M.; Kurth, W. S. +40 more
A detailed overview of the knowledge gaps in our understanding of the heliospheric interaction with the largely unexplored Very Local Interstellar Medium (VLISM) are provided along with predictions of with the scientific discoveries that await. The new measurements required to make progress in this expanding frontier of space physics are discussed…
High-resolution Spectroscopic Metallicities of Milky Way Cepheid Standards and Their Impact on the Leavitt Law and the Hubble Constant
Riess, Adam G.; Macri, Lucas M.; Marconi, Marcella +10 more
Milky Way Cepheid variables with accurate Hubble Space Telescope photometry have been established as standards for primary calibration of the cosmic distance ladder to achieve a percent-level determination of the Hubble constant (H 0). These 75 Cepheid standards are the fundamental sample for investigation of possible residual systemati…
Solar Flare Ribbon Fronts. I. Constraining Flare Energy Deposition with IRIS Spectroscopy
Polito, Vanessa; Xu, Yan; Kerr, Graham S. +2 more
Spectral lines formed at lower atmospheric layers show peculiar profiles at the "leading edge" of ribbons during solar flares. In particular, increased absorption of the BBSO/GST He I λ10830 line, as well as broad and centrally reversed profiles in the spectra of the Mg II and C II lines observed by the IRIS satellite, has been reported. In this w…
Milky Way globular clusters on cosmological timescales. I. Evolution of the orbital parameters in time-varying potentials
Khoperskov, Sergey; Berczik, Peter; Ishchenko, Maryna +4 more
Context. Recent observational data show that the Milky Way galaxy contains about 170 globular clusters. A fraction of them is likely formed in dwarf galaxies that were accreted onto the Milky Way in the past, while the remaining clusters were formed in situ. Therefore, the different parameters, including the orbits, of the globular clusters are a …
The three-dimensional structure of galactic molecular cloud complexes out to 2.5 kpc
Bailer-Jones, C. A. L.; Fouesneau, M.; Dharmawardena, T. E. +5 more
Knowledge of the three-dimensional structure of Galactic molecular clouds is important for understanding how clouds are affected by processes such as turbulence and magnetic fields and how this structure affects star formation within them. Great progress has been made in this field with the arrival of the Gaia mission, which provides accurate dist…