Search Publications
A discussion on estimating small bodies taxonomies using phase curves results
Alvarez-Candal, Alvaro
Upcoming large multiwavelength photometric surveys will provide a leap in our understanding of small body populations, among other fields of modern astrophysics. Serendipitous observations of small bodies in different orbital locations allow us to study diverse phenomena related to how their surfaces scatter solar light. In particular, multiple ob…
The Zelima asteroid family: Resonant configuration and rotational fission clusters
Carruba, V.; Ribeiro, J. V.
Asteroid families are groups of asteroids that are identifiable in domains of proper elements. They may be the outcome of a collision, or the product of rotational fission. Among collisional families, young asteroid families are of interest because they preserve information on the original ejection velocity field with which the asteroid fragments …
A comparative study of size frequency distributions of Jupiter Trojans, Hildas and main belt asteroids: A clue to planet migration history
Terai, Tsuyoshi; Takato, Naruhisa; Ohtsuki, Keiji +4 more
Since 2002, we have obtained size frequency distributions (SFDs) of main belt asteroids (MBAs), Hildas, and Jupiter Trojans (JTs) by using the 8.2-m Subaru Telescope equipped with the wide-field CCD cameras: Suprime-Cam (SC) or Hyper Suprime-Cam (HSC). After combining these SFDs with SFDs obtained from other surveys, we performed a comparative stu…
On the age of the Beagle secondary asteroid family
Carruba, V.
The Beagle family is a C-type subgroup of the Themis family, in the outer main belt. Previous works suggested that it could be younger than 20 Myr and a possible source for the dust in the i ≃1.4∘ α zodiacal dust band. Here we took advantage of a much larger database for Beagle family members to revisit previous age estimates of this gr…
The influence of Ceres on the dynamical evolution of the Zdenekhorsky/Nemesis asteroid family
Carruba, V.; Barletta, W.
The Nemesis family, also identified as the Zdenekhorsky family by some authors, is an "incomplete" asteroid family in the central main belt, characterized by an asymmetric distribution between its left and right side, with most of its members located in the left part of the family. It has been suggested that this asymmetry, as well as the shape of…
2012 TC4 - An unusual fast-rotating PHA with C-type taxonomy
Ip, Wing-Huen; Lin, Zhong-Yi; Ngeow, Chow-Choong
The potentially hazardous asteroid 2012 TC4 made an Earth close approach at a distance of 0.11 lunar distance on 12 October 2017. Photometric observations were carried out between October 11 and October 12 at the Lulin Observatory at short cadence. Data analysis of the light curves shows that this PHA has a fast rotation period of 12.25 min, a lig…
Comparison of diffuse infrared and far-ultraviolet emission in the Large Magellanic Cloud: The data
Shalima, P.; Gogoi, Rupjyoti; Saikia, Gautam +1 more
Dust scattering is the main source of diffuse emission in the far-ultraviolet (FUV). For several locations in the Large Magellanic Cloud (LMC), Far Ultraviolet Spectroscopic Explorer (FUSE) satellite has observed diffuse radiation in the FUV with intensities ranging from 1000 to 3×105 photon units and diffuse fraction between 5% and 20%…
Variations in the 3.3 µm feature and carbonaceous dust in AKARI data
Hammonds, M.; Mori, T.; Usui, F. +1 more
A wealth of near infrared spectroscopic data for a large number of galactic objects was recorded with AKARI during its active lifetime. The hydrocarbon emission features around 3.3 - 3.5 m are modelled here as a series of 6 Voigt profiles arising due to hydrogen atoms found in different molecular structures within the emitting spectroscopic carrie…
A study of iron and dust in the supernova remnant IC 443
Onaka, Takashi; Lee, Ho-Gyu; Kaneda, Hidehiro +3 more
We performed near-infrared line mapping of the supernova remnant IC 443 with the IRSF 1.4-m telescope, using the narrow-band filters tuned for [Fe II] 1.257 µm, [Fe II] 1.644 µm, and Paβ. We detected the [Fe II] and Paβ emissions from a very wide area of the observed region (30‧ ×35‧). These line intensity maps re…
An AKARI infrared study of dust emission in Galactic bubbles indicative of large-scale cloud-cloud collisions
Kaneda, H.; Sano, H.; Ishihara, D. +3 more
We report our systematic study on dust emission in massive star-forming regions indicative of large-scale cloud-cloud collisions, using the AKARI infrared (IR) all-sky survey data at wavelengths of 9, 18, 65, 90, 140, and 160 µm. We focus on the Galactic bubbles catalogued by Spitzer, which are categorized into two types of morphology, close…