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Automated crater detection with human level performance
Lee, Christopher; Hogan, James
Crater cataloging is an important yet time-consuming part of geological mapping. We present an automated Crater Detection Algorithm (CDA) that is competitive with expert-human researchers and hundreds of times faster.
The CDA uses multiple neural networks to process digital terrain model and thermal infra-red imagery to identify and locate cr…Stellar feedback in a clumpy galaxy at z 3.4
Le Floc'h, E.; Rodighiero, G.; Zanella, A. +18 more
Giant star-forming regions (clumps) are widespread features of galaxies at z ≈ 1-4. Theory predicts that they can play a crucial role in galaxy evolution, if they survive to stellar feedback for >50 Myr. Numerical simulations show that clumps' survival depends on the stellar feedback recipes that are adopted. Up to date, observational constrain…
High-resolution Hα imaging of the northern Galactic plane and the IGAPS image database
Eislöffel, J.; Groot, P. J.; Stecklum, B. +19 more
The INT Galactic Plane Survey (IGAPS) is the merger of the optical photometric surveys IPHAS and UVEX based on data from the Isaac Newton Telescope (INT) obtained between 2003 and 2018. It captures the entire northern Galactic plane within the Galactic coordinate range |b|< 5° and 30° < ℓ < 215°. From the beginning, the incorporation of n…
The Effect of Environment on Star Formation Activity and Morphology at 0.5 < z < 2.5 in CANDELS
Fang, Guanwen; Gu, Yizhou; Yuan, Qirong +2 more
To explore the effect of environment on star formation and the morphological transformation of high-redshift galaxies, we present a robust estimation of localized galaxy overdensity using a density estimator within the Bayesian probability framework. The maps of environmental overdensity at 0.5 < z < 2.5 are constructed for the five CANDELS …
The physical properties of local (U)LIRGs: A comparison with nearby early- and late-type galaxies
Bianchi, S.; Georgantopoulos, I.; Masoura, V. A. +6 more
Aims: In order to pinpoint the place of the (ultra-) luminous infrared galaxies ((U)LIRGs) in the local Universe, we examine the properties of a sample of 67 such nearby systems and compare them with those of 268 early- and 542 late-type, well studied, galaxies from the DustPedia database.
Methods: We made use of multi-wavelength photome…
Core Mass Function of a Single Giant Molecular Cloud Complex with 10,000 Cores
Qiu, Keping; Cao, Yue; Zhang, Qizhou +2 more
Similarity in shape between the initial mass function (IMF) and the core mass functions (CMFs) in star-forming regions prompts the idea that the IMF originates from the CMF through a self-similar core-to-star mass mapping process. To accurately determine the shape of the CMF, we create a sample of 8431 cores with the dust continuum maps of the Cyg…
Characteristics of the open star cluster Kronberger 60 using Gaia DR2
Tadross, A. L.; Hendy, Y. H.
The estimation of the main parameters of star clusters is a very important target in astrophysical studies. Many of the open clusters listed in known catalogs have insufficient astrometric parameters. Improving the observations and analysis methods proved that some of them are asterisms and not true clusters. The most important aspect of using the…
The GAPS Programme at TNG. XXIX. No detection of reflected light from 51 Peg b using optical high-resolution spectroscopy
Scandariato, G.; Pagano, I.; Poretti, E. +44 more
Context. The analysis of exoplanetary atmospheres by means of high-resolution spectroscopy is an expanding research field which provides information on the chemical composition, thermal structure, atmospheric dynamics, and orbital velocity of exoplanets.
Aims: In this work, we aim to detect the light reflected by the exoplanet 51 Peg b by emp…
Bursts before Burst: A Comparative Study on FRB 200428-associated and FRB-absent X-Ray Bursts from SGR J1935+2154
Lin, Lin; Zhang, Bing; Dai, Zi-Gao +8 more
Accompanied by an X-ray burst, the fast radio burst (FRB) FRB 200428 was recently confirmed as originating from the Galactic magnetar soft gamma repeater (SGR) SGR J1935+2154. Just before and after FRB 200428 was detected, the Five-hundred-meter Aperture Spherical radio Telescope (FAST) had been monitoring SGR J1935+2154 for eight hours. From UTC …
The Masses of Supernova Remnant Progenitors in NGC 6946
Williams, Benjamin F.; Blair, William P.; Dolphin, Andrew +5 more
We constrained the progenitor masses for 169 supernova remnants (SNRs), eight historically observed supernovae (SNe), and the black hole formation candidate in NGC 6946, finding that they are consistent with originating from a standard initial mass function. Additionally, there were 16 remnants that showed no sign of nearby star formation consiste…