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... hereafter BRL97), places this candidate inside our region of interest, within the uncertainties. We also include two DA stars from the spectroscopic analysis of Gianninas et al. (2011), L796-10 (0053−117) and GD 25 (0213+396), whose distances are estimated to be inside the 20 pc region, within the u ...
... hereafter BRL97), places this candidate inside our region of interest, within the uncertainties. We also include two DA stars from the spectroscopic analysis of Gianninas et al. (2011), L796-10 (0053−117) and GD 25 (0213+396), whose distances are estimated to be inside the 20 pc region, within the u ...
The physics of star formation
... due mostly to the emission of far-infrared radiation from molecules such as CO, which is usually the most important coolant (McKee et al 1982; Gilden 1984). However, in the densest collapsing cloud cores the gas becomes thermally coupled to the dust, which then controls the temperature by its strong ...
... due mostly to the emission of far-infrared radiation from molecules such as CO, which is usually the most important coolant (McKee et al 1982; Gilden 1984). However, in the densest collapsing cloud cores the gas becomes thermally coupled to the dust, which then controls the temperature by its strong ...
X-Ray Properties of Young Stars and Stellar Clusters
... heated (beyond effects due to ultraviolet radiation) out to considerable distances and thus made accessible to magnetic fields. X-ray observations reveal the presence of highly ionized plasma with temperatures of 107–108 K. In lower-mass stars, the X-ray emission is reminiscent of X-rays observed on ...
... heated (beyond effects due to ultraviolet radiation) out to considerable distances and thus made accessible to magnetic fields. X-ray observations reveal the presence of highly ionized plasma with temperatures of 107–108 K. In lower-mass stars, the X-ray emission is reminiscent of X-rays observed on ...
The Life Cycle of Stars: Supernovae in Starbursts by Jason Kezwer
... rates and settling the debate between the dominant energy source in LIRGs: star formation or AGN activity. Both the deduced high star formation rate and far-IR luminosity of Arp 220 suggest an atypically high supernova rate of 1-4 per year, two orders of magnitude greater than that of the Milky Way. ...
... rates and settling the debate between the dominant energy source in LIRGs: star formation or AGN activity. Both the deduced high star formation rate and far-IR luminosity of Arp 220 suggest an atypically high supernova rate of 1-4 per year, two orders of magnitude greater than that of the Milky Way. ...
A Search for Extrasolar Planets Using Echoes Produced in Flare
... extending through the stellar atmosphere (Haisch et. al., 1991; Martens and Kuin, 1989). The connection points of the line current with the photosphere provide the endpoints of the “ribbons.” In a static (or even quasi-static) atmosphere, a balance of forces would keep the filament stationary. Howev ...
... extending through the stellar atmosphere (Haisch et. al., 1991; Martens and Kuin, 1989). The connection points of the line current with the photosphere provide the endpoints of the “ribbons.” In a static (or even quasi-static) atmosphere, a balance of forces would keep the filament stationary. Howev ...
Type II SuperNova - University of Dayton
... the Large Magellanic Cloud. This was the first "nearby" supernova in the last 3 centuries, and for the first time astronomers not only observed the light show, but also detected 19 of the elusive neutrinos (the detectors observed electron anti-neutrinos, to be more precise) produced by the collapse ...
... the Large Magellanic Cloud. This was the first "nearby" supernova in the last 3 centuries, and for the first time astronomers not only observed the light show, but also detected 19 of the elusive neutrinos (the detectors observed electron anti-neutrinos, to be more precise) produced by the collapse ...
Open clusters and associations in the Gaia era
... an issue if the survey does not extend beyond the cluster tidal radius, especially if there is mass segregation as the incompleteness level will then depend on mass. Moreover, objects might be missed around bright stars due to contrast issue, in crowded regions or in area with high extinction. As fo ...
... an issue if the survey does not extend beyond the cluster tidal radius, especially if there is mass segregation as the incompleteness level will then depend on mass. Moreover, objects might be missed around bright stars due to contrast issue, in crowded regions or in area with high extinction. As fo ...
Ages of young stars
... individual objects. A reliable age scale is established above 20 Myr from measurement of the Lithium Depletion Boundary (LDB) in young clusters, and consistency is shown between these ages and those from the upper main sequence and the main sequence turn-off – if modest core convection and rotation ...
... individual objects. A reliable age scale is established above 20 Myr from measurement of the Lithium Depletion Boundary (LDB) in young clusters, and consistency is shown between these ages and those from the upper main sequence and the main sequence turn-off – if modest core convection and rotation ...
Ages of Young Stars
... (l) Cargile and James (2010), (m) Naylor et al. (2009), (n) derived by E. Mamajek using data from Hauck and Mermilliod (1998) and isochrones from Bertelli et al. (2009), (o) Ventura et al. (1998). ally negligible) and, presented separately, the systematic absolute age uncertainty estimated by Burke ...
... (l) Cargile and James (2010), (m) Naylor et al. (2009), (n) derived by E. Mamajek using data from Hauck and Mermilliod (1998) and isochrones from Bertelli et al. (2009), (o) Ventura et al. (1998). ally negligible) and, presented separately, the systematic absolute age uncertainty estimated by Burke ...
Cassiopeia (constellation)
Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty. Cassiopeia was one of the 48 constellations listed by the 2nd-century Greek astronomer Ptolemy, and it remains one of the 88 modern constellations today. It is easily recognizable due to its distinctive 'M' shape when in upper culmination but in higher northern locations when near lower culminations in spring and summer it has a 'W' shape, formed by five bright stars. It is bordered by Andromeda to the south, Perseus to the southeast, and Cepheus to the north. It is opposite the Big Dipper.In northern locations above 34ºN latitude it is visible year-round and in the (sub)tropics it can be seen at its clearest from September to early November in its characteristic 'M' shape. Even in low southern latitudes below 25ºS is can be seen low in the North.