Search Publications
Nine new M dwarf planet candidates from TESS including five gas giants
Kunimoto, Michelle; Eschen, Yoshi Nike Emilia
We present the detection of nine new planet candidates orbiting M dwarfs, identified using an independent search and vetting pipeline applied to TESS Full-Frame Image data from Sectors 1 to 63. Our candidates include planets as small as 1.4 $\mathrm{ R}_{{\oplus }}$, with orbital periods up to 20 d. Among the nine new candidates, we identified fiv…
Physical properties of trans-Neptunian object (143707) 2003 UY117 derived from stellar occultation and photometric observations
Pallé, E.; Souami, D.; Alvarez-Candal, A. +49 more
Context. Trans-Neptunian objects (TNOs) are considered to be among the most primitive objects in our Solar System. Knowledge of their primary physical properties is essential for understanding their origin and the evolution of the outer Solar System. In this context, stellar occultations are a powerful and sensitive technique for studying these di…
Four new eclipsing accreting ultracompact white dwarf binaries found with the Zwicky Transient Facility
Drake, A. J.; Bloom, J. S.; Kulkarni, S. R. +10 more
Context. Accreting ultracompact white dwarf binaries contain a white dwarf that is accreting from a degenerate object. They have orbital periods shorter than 65 min.
Aims: We report the discovery and the orbital period of four new eclipsing accreting ultracompact white dwarf binaries found using the Zwicky Transient Facility (ZTF) and discuss…
Non-conventional approach for deriving the radial sizes of coronal mass ejections at different instances: discrepancies in the estimates between remote and in situ observations
Mishra, Wageesh; Agarwal, Anjali
Understanding the evolution of radial sizes and instantaneous expansion speeds of coronal mass ejections (CMEs) is crucial for assessing their impact duration on Earth's environment. We introduce a non-conventional approach to derive the CME's radial sizes and expansion speeds at different instances during its passage over a single-point in situ s…
A 9 Month Hubble Space Telescope Near-UV Survey of M87. II. A Strongly Enhanced Nova Rate near the Jet of M87
Shara, Michael M.; Sparks, William; Lessing, Alec M. +3 more
The 135 classical novae that we have discovered in M87 with two Hubble Space Telescope imaging surveys appear to be strongly concentrated along that galaxy's jet. Detailed simulations show that the likelihood that this distribution occurred by chance is of order 0.3%. The novae near the jet display outburst characteristics (peak luminosities, colo…
Revisiting the local interstellar radiation field using Gaia DR3
Bianchi, S.
Context. Dust grains in the interstellar medium are heated by the integrated radiation from stars in the Milky Way. Thus, knowledge of the local interstellar radiation field (LISRF) is necessary to interpret observations of dust emission in the infrared and constrain (some) properties of interstellar grains. The LISRF representation that is most w…
An empirical isochrone archive for nearby open clusters
Meingast, Stefan; Rottensteiner, Alena
Context. The ages of star clusters and co-moving stellar groups contain essential information about the Milky Way. Their special properties and placement throughout the galactic disk make them excellent tracers of galactic structure and key components to unlocking its star formation history. Yet, even though the importance of stellar population ag…
Implications on star formation rate indicators from H II regions and diffuse ionized gas in the M101 Group
Watkins, A. E.; Mihos, J. C.; Harding, P. +1 more
We examine the connection between diffuse ionized gas (DIG), H II regions, and field O and B stars in the nearby spiral M101 and its dwarf companion NGC 5474 using ultra-deep H α narrow-band imaging and archival GALEX UV imaging. We find a strong correlation between DIG H α surface brightness and the incident ionizing flux leaked from the nearby H…
IRIS2+: A Comprehensive Database of Stratified Thermodynamic Models in the Low Solar Atmosphere
De Pontieu, Bart; Gošić, Milan; Sainz Dalda, Alberto +1 more
We present the most comprehensive collection of stratified-in-optical-depth thermodynamic models of the lower solar atmosphere. This database, named IRIS2+, consists of 40,320 synthetic representative profiles (RPs) and their corresponding representative model atmospheres (RMAs). The latter result from inverting the observed RPs, which …
Solar Eruptive Phenomena Associated with Solar Energetic Electron Spectral Types
Krucker, Säm; Wimmer-Schweingruber, Robert F.; Wang, Linghua +3 more
The energy spectral shape of solar energetic electron events carries important information on the energetic electron source/acceleration at the Sun. We investigate the association of six newly identified solar energetic electron spectral types with solar eruptive phenomena, including the downward double-power-law (DDPL) spectrum with break energy …