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A Deep View into the Nucleus of the Sagittarius Dwarf Spheroidal Galaxy with MUSE. III. Discrete Multicomponent Population-dynamical Models Based on the Jeans Equations
Lützgendorf, Nora; Böker, Torsten; Kamann, Sebastian +12 more
We present comprehensive multicomponent dynamical models of M54 (NGC 6715), the nuclear star cluster of the Sagittarius (Sgr) dwarf galaxy, which is undergoing a tidal disruption in the Milky Way halo. Previous papers in this series used a large MUSE mosaic data set to identify multiple stellar populations in the system and study their kinematic d…
OCCASO. IV. Radial velocities and open cluster kinematics
Jordi, C.; Casamiquela, L.; Cantat-Gaudin, T. +8 more
Context. Open clusters (OCs) are widely used as test particles to investigate a variety of astrophysical phenomena, from stellar evolution to Galactic evolution. Gaia and the complementary massive spectroscopic surveys are providing an unprecedented wealth of information about these systems.
Aims: The Open Cluster Chemical Abundances from Spa…
Assessing the role of clay and salts on the origin of MARSIS basal bright reflections
Orosei, Roberto; Caprarelli, Graziella; Pettinelli, Elena +7 more
Anomalously bright basal reflections detected by MARSIS at Ultimi Scopuli have been interpreted to indicate the presence of water-saturated materials or ponded liquid water at the base of the South Polar Layered Deposits (SPLD). Because conventional models assume basal temperatures (≤200 K) much lower than the melting point of water, this interpre…
Validation scheme for solar coronal models: Constraints from multi-perspective observations in EUV and white light
Temmer, M.; Asvestari, E.; Pomoell, J. +2 more
Context. In this paper, we present a validation scheme to investigate the quality of coronal magnetic field models, which is based on comparisons with observational data from multiple sources.
Aims: Many of these coronal models may use a range of initial parameters that produce a large number of physically reasonable field configurations. How…
SPYGLASS. II. The Multigenerational and Multiorigin Star Formation History of Cepheus Far North
Murphy, Simon J.; Rizzuto, Aaron C.; Kraus, Adam L. +4 more
Young stellar populations provide a record of past star formation, and by establishing their members' dynamics and ages, it is possible to reconstruct the full history of star formation events. Gaia has greatly expanded the number of accessible stellar populations, with one of the most notable recently discovered associations being Cepheus Far Nor…
A Multiwavelength Study of GRS 1716-249 in Outburst: Constraints on Its System Parameters
Soria, Roberto; Gandhi, Poshak; Homan, Jeroen +27 more
We present a detailed study of the evolution of the Galactic black hole transient GRS 1716-249 during its 2016-2017 outburst at optical (Las Cumbres Observatory), mid-infrared (Very Large Telescope), near-infrared (Rapid Eye Mount telescope), and ultraviolet (the Neil Gehrels Swift Observatory Ultraviolet/Optical Telescope) wavelengths, along with…
Identification, mass, and age of primary red clump stars from spectral features derived with the LAMOST DR7
Luo, A. -Li; Chen, Yu-Qin; He, Xu-Jiang
Although red clump (RC) stars are easy to identify due to their stability of luminosity and colour, about 20-50 per cent are actually red giant branch (RGB) stars in the same location on the HR diagram. In this paper, a sample of 210 504 spectra for 184 318 primary RC (PRC) stars from the LAMOST DR7 is identified, which has a purity of higher than…
10 Yr Transformation of the Obscuring Wind in NGC 5548
Gu, Liyi; Kriss, Gerard A.; Mehdipour, Missagh +4 more
A decade ago, the archetypal Seyfert-1 galaxy NGC 5548 was discovered to have undergone major spectral changes. The soft X-ray flux had dropped by a factor of 30 while new broad and blueshifted UV absorption lines appeared. This was explained by the emergence of a new obscuring wind from the accretion disk. Here we report on the striking long-term…
MUSE sneaks a peek at extreme ram-pressure stripping events - V. Towards a complete view of the galaxy cluster A1367
Fumagalli, Michele; Yoshida, Michitoshi; Fossati, Matteo +6 more
We present an analysis of the kinematics and ionization conditions in a sample composed of seven star-forming galaxies undergoing ram-pressure stripping in the A1367 cluster, and the galaxy ESO137-001 in the Norma cluster. MUSE observations of two new galaxies in this sample, CGCG097-073 and CGCG097-079, are also presented. This sample is characte…
J-PLUS: a catalogue of globular cluster candidates around the M 81/M 82/NGC 3077 triplet of galaxies
Chies-Santos, Ana L.; Cenarro, A. Javier; Dupke, Renato +16 more
Globular clusters (GCs) are proxies of the formation assemblies of their host galaxies. However, few studies exist targeting GC systems of spiral galaxies up to several effective radii. Through 12-band Javalambre Photometric Local Universe Survey (J-PLUS) imaging, we study the point sources around the M 81/M 82/NGC 3077 triplet in search of new GC…