Search Publications
Age-velocity relations with GALEXF U V
Murray-Clay, Ruth; Crandall, Sara; Smith, Graeme H. +3 more
A relationship between chromospheric activity and age is calibrated for FGK dwarf stars using GALEX
The nature of sub-millimetre galaxies II: an ALMA comparison of SMG dust heating mechanisms
Infante, L.; Metcalfe, N.; Shanks, T. +5 more
We compare the contribution of active galactic nuclei (AGNs) and star formation towards dust heating in sub-mm galaxies (SMGs). We have used ALMA at 0.1-arcsec resolution to image a complete flux-limited sample of seven sub-mm sources previously shown to have spectral energy distributions that were as well-fitted by obscured AGN as star-forming ga…
Off-season lee wave cloud over the Arsia Mons in Mars: A study based on Mars Colour Camera (MCC)
Kalita, Jyotirmoy; Guha, Anirban
The present analysis reported the lee wave interpretation on Arsia Mons Elongated Cloud (AMEC) that used to appear over the lee side of the Arsia Mons. The present work also reported the wavelength, the cloud's height, and wind speed of the observed lee wave structure. The estimated wind speed is 86 ± 4.9 m/s, with a wavelength of 60 ± 0.3 km at a…
Interstellar Extinction at High Galactic Latitudes: An Analytical Approximation
Kovaleva, D. A.; Malkov, O. Yu.; Avdeeva, A. S. +1 more
Distance dependences of interstellar extinction (${{A}V}(d)$) for a number of high-latitude areas of the southern sky were obtained using the data of the RAVE DR6 spectroscopic survey and the Gaia DR2/EDR3 astrometric survey. These dependencies were approximated by the classical barometric function (cosecant law). Function parameters we…
X-Ray Observation of the Roche-lobe-filling White Dwarf plus Hot Subdwarf System ZTF J213056.71+442046.5
Tiengo, A.; Mereghetti, S.; Esposito, P. +9 more
ZTF J213056.71+442046.5 is the prototype of a small class of recently discovered compact binaries composed of a white dwarf and a hot subdwarf that fills its Roche lobe. Its orbital period of only 39 minutes is the shortest known for the objects in this class. Evidence for a high orbital inclination (i = 86°) and for the presence of an accretion d…
Rising of a magnetic null point in the wake of an erupting flux rope
Filippov, Boris
Arcades of flare loops rise, slowing down in the wake of eruptive prominences. They lag significantly from the top of prominences and do not reach too great heights in the corona. It is widely accepted that their evolution is governed by the limited reconnection rate in the current sheet developed below the eruptive prominence. We suggest that the…
Energy Exchanges in Saturn's Polar Regions From Cassini Observations: Eddy-Zonal Flow Interactions
Read, Peter L.; Sanchez-Lavega, Agustin; Antuñano, Arrate +3 more
Saturn's polar regions (polewards of ∼63° planetocentric latitude) are strongly dynamically active with zonal jets, polar cyclones and the intriguing north polar hexagon (NPH) wave. Here we analyze measurements of horizontal winds, previously obtained from Cassini images by Antuñano et al. (2015), htt…
Fine Structures of the Inner Solar Corona and the Associated Magnetic Topology
Stenborg, Guillermo; Ko, Yuan-Kuen; Lionello, Roberto +3 more
We present the fine structure of the inner solar corona between 1.65 and 3.0 solar radii as revealed by the STEREO-A COR1 white-light coronagraph from 2008 June 20 to July 31. The COR1 imaging data were wavelet processed to enhance the intensity contrast of coronal features. The constructed limb synoptic maps at a range of altitudes show the evolu…
The Galaxy structure across the Vela Gum
Pera, M. S.; Vázquez, R. A.; Giorgi, E. E. +3 more
We present first and preliminary results of a study on the open cluster population seen against the Gum Nebula. This is a very large and nearby emission gas structure covering from l=240° to l=270° and from b=+8° to b=-15°, approximately. Taking advantage of the impressive precision and depth (G≈ 20) of data provided by the Gaia mission (EDR3) and…
The gMOSS: the galaxy survey and galaxy populations of the large homogeneous field
Movsessian, T. A.; Dodonov, S. N.; Kotov, S. S. +1 more
We present the gMOSS (Galaxies of Medium-band One-meter Schmidt telescope Survey) catalogue of ~19 000 galaxies in 20 filters (4 broad-band SDSS and 16 medium-band filters). We observed 2.386 deg2 on the central part of the HS47.5-22 field with the 1-m Schmidt telescope of the Byurakan Astrophysical Observatory. The gMOSS is a complete …