Search Publications
Extinction of Taurus, Orion, Perseus and California Molecular Clouds Based on the LAMOST, 2MASS, and Gaia Surveys. II. The Extinction Law
Wang, Shu; Jiang, Biwei; Li, Jun +1 more
The extinction law from ultraviolet (UV) to infrared (IR; 0.2–24 µm) is determined by relying on the blue-edge method and color-excess ratios for some nearby molecular clouds, from the low-mass star-forming region to the massive star-forming region. The observational data are collected from nine photometric surveys, along with stellar parame…
A Global Perspective with Updated Constraints on the Ultra-hot Jupiter WASP-19b: Atmospheric Properties and Stellar Activity
Kataria, Tiffany; Ballester, Gilda E.; Knutson, Heather A. +7 more
We present a detailed reanalysis of the atmospheric properties of WASP-19b, an ultra-hot Jupiter (1.14 M Jup, 1.41 R Jup) orbiting an active Sun-like star every 0.79 day. We reanalyze a transit and secondary eclipse of WASP-19b observed by the Hubble Space Telescope's Wide Field Camera 3 spectrograph (1.1–1.7 µm). When …
Distribution and Properties of Molecular Gas toward the Monoceros OB1 Region
Wang, Hongchi; Zhang, Shiyu; Su, Yang +9 more
We perform a comprehensive CO study toward the Monoceros OB1 (Mon OB1) region based on the Milky Way Imaging Scroll Painting survey at an angular resolution of about 50″. The high-sensitivity data, together with the high dynamic range, show that molecular gas in the 8° × 4° region displays complicated hierarchical structures and various morphology…
Molecular cloud matching in CO and dust in M33: II. Physical properties of giant molecular clouds
Kobayashi, Masato I. N.; Bigiel, Frank; Ossenkopf-Okada, Volker +8 more
Understanding the physical properties such as mass, size, and surface mass density of giant molecular clouds or associations (GMCs/GMAs) in galaxies is crucial for gaining deeper insights into the molecular cloud and star formation (SF) processes. We determine these quantities for the Local Group flocculent spiral galaxy M33 using Herschel dust an…
STONKS: Quasi-real time XMM-Newton transient detection system
Georgantopoulos, I.; Schwope, A.; Webb, N. A. +6 more
Context. Over recent decades, astronomy has entered the era of massive data and real-time surveys. This is improving the study of transient objects - although they still contain some of the most poorly understood phenomena in astrophysics, as it is inherently more difficult to obtain data to constrain the proposed models.
Aims: In order to he…
An experimental study of the biological impact of a superflare on the TRAPPIST-1 planets
Luna, G. J. M.; Patel, M. R.; Hanslmeier, A. +5 more
In this study, we conducted experiments to assess the biological effects of high fluences of UV radiation (UVR) on the TRAPPIST-1 planetary system (planets e, f, g within the habitable zone), unlike previous estimates made by other authors which used theoretical approaches. To this end, we first calculated the UV fluxes at the orbits of the planet…
Euclid: The rb‑M* relation as a function of redshift: I. The 5 × 109 M⊙ black hole in NGC 1272
Cimatti, A.; Baccigalupi, C.; Burigana, C. +148 more
Core ellipticals, which are massive early-type galaxies with almost constant inner surface brightness profiles, are the result of dry mergers. During these events, a binary black hole (BBH) is formed, destroying the original cuspy central regions of the merging objects and scattering stars that are not on tangential orbits. The size of the emergin…
Different Planetary Eccentricity-period (PEP) Distributions of Small and Giant Planets
Faigler, Simchon; Mazeh, Tsevi; Bashi, Dolev
We used the database of 1040 short-period (1 ≤ P < 200 days) exoplanets radial-velocity orbits to study the planetary eccentricity-period (PEP) distribution. We first divided the sample into low- and high-mass exoplanet subsamples based on the distribution of the (minimum) planetary masses, which displays a clear two-Gaussian distribution, sepa…
Mass determination of two Jupiter-sized planets orbiting slightly evolved stars: TOI-2420 b and TOI-2485 b
Trifonov, Trifon; Henning, Thomas; Hellier, Coel +68 more
Context. Hot and warm Jupiters might have undergone the same formation and evolution path, but the two populations exhibit different distributions of orbital parameters. This challenges our understanding of their actual origin. Aims. We report the results of our warm Jupiters survey, which was carried out with the CHIRON spectrograph within the KE…
A comparison of compact, presumably young with extended, evolved radio active galactic nuclei
Meusinger, Helmut; Mhaskey, Mukul
Context. The triggering and evolution of active galactic nuclei (AGNs) and the interaction of the AGN with its host galaxy is an important topic in extragalactic astrophysics. Radio sources with peaked spectra (peaked spectrum sources, PSS) and compact symmetric objects (CSO) are powerful, compact, and presumably young AGNs and therefore particula…