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Not gone with the wind: Planet occurrence is independent of stellar galactocentric velocity
Kipping, David M.; McTier, Moiya A. S.
We demonstrate that planet occurrence does not depend on stellar galactocentric velocity in the Solar neighbourhood. Using Gaia DR2 astrometry and radial velocity data, we calculate 3D galactocentric velocities for 197 090 Kepler field stars, 1647 of which are confirmed planet hosts. When we compare the galactocentric velocities of planet hosts to…
Optical properties of amorphous carbon dust around C-stars: new constraints from 2MASS and Gaia observations
Nanni, Ambra
In this work the optical properties of amorphous carbon (amC) dust condensed around carbon(C)-stars are constrained by comparing the observations for the Large Magellanic Cloud C-stars from the Two Micron All Sky Survey (2MASS) and from the Gaia data release 2 (DR2) with the synthetic photometry obtained by computing dust growth and radiative tran…
Discovery of a strong ionized-gas outflow in an AKARI-selected ultra-luminous infrared galaxy at z = 0.5
Yamamura, Issei; Noda, Hirofumi; Kokubo, Mitsuru +5 more
In order to construct a sample of ultra-luminous infrared galaxies (ULIRGs; with infrared luminosity LIR > 1012 L_{⊙}) at 0.5 < z < 1, we are conducting an optical follow-up program for bright 90 µm far-infrared sources with a faint optical (i < 20 mag) counterpart selected in the AKARI Far-Infrared Surveyor…
Inversion of HIPPARCOS and Gaia photometric data for asteroids. Asteroid rotational properties from sparse photometric data
Tanga, P.; Cellino, A.; Hestroffer, D. +2 more
Context. Sparse photometric data can be used to determine the spin properties and infer information about the shapes of asteroids. The algorithm adopted for the inversion of Gaia photometric data assumes, for the sake of simplicity and to minimize CPU execution time, that the objects have triaxial ellipsoid shapes. In the past, this algorithm was …
NGC 1261: A Time-Series VI Study of its Variable Stars
Arellano Ferro, A.; Calderón, J. H.; Bustos Fierro, I. H. +1 more
Time-series VI CCD photometry of the globular cluster NGC 1261 is employed to study its variable star population. A membership analysis of most variables based on Gaia DR2 proper motions and colours was performed prior to the estimation of the mean cluster distance and metallicity. The light curves of the member RR Lyrae were Fourier decomposed to…
Catalog of High Protostellar Surface Density Regions in Nearby Embedded Clusters
Li, Juan; Myers, Philip C.; Kirk, Helen +3 more
We analyze high-quality stellar catalogs for 24 young and nearby (within 1 kpc) embedded clusters and present a catalog of 32 groups which have a high concentration of protostars. The median effective radius of these groups is 0.17 pc. The median protostellar and pre-main-sequence star surface densities are 46 M ⊙ pc-2 and 11…
T CrB: Radio Observations during the 2016-2017 “Super-active” State
Chomiuk, Laura; Sokoloski, Jennifer L.; Mukai, Koji +6 more
We obtained radio observations of the symbiotic binary and known recurrent nova T Coronae Borealis following a period of increased activity in the optical and X-ray bands. A comparison of our observations with those made prior to 2015 indicates that the system is in a state of higher emission in the radio as well. The spectral energy distributions…
A high-resolution, dust-selected molecular cloud catalogue of M33, the Triangulum Galaxy
Smith, Matthew W. L.; Williams, Thomas G.; Gear, Walter K.
We present a catalogue of Giant Molecular Clouds (GMCs) in M33, extracted from cold dust continuum emission. Our GMCs are identified by computing dendrograms. We measure the spatial distribution of these clouds, and characterize their dust properties. Combining these measured properties with CO(J = 2-1) and 21 cm H I data, we calculate the gas-to-…
The origin of R CrA variability. A complex triple system hosting a disk
Messina, S.; D'Orazi, V.; Desidera, S. +5 more
Context. R CrA is the brightest member of the Coronet star-forming region and is the closest Herbig AeBe star with a spectrum dominated by emission lines. Its luminosity has been monitored since the end of the nineteenth century, but the origin of its variability, which shows a stable period of 65.767 ± 0.007 days, is still unknown.
Aims: We …
HSC-XD 52: An X-Ray Detected AGN in a Low-mass Galaxy at z ∼ 0.56
Johnson, Sean D.; Sawicki, Marcin; Gwyn, Stephen +8 more
The properties of low-mass galaxies hosting central black holes provide clues about the formation and evolution of the progenitors of supermassive black holes. In this Letter, we present HSC-XD 52, a spectroscopically confirmed low-mass active galactic nucleus (AGN) at an intermediate redshift of z ∼ 0.56. We detect this object as a very luminous …