Lu_Ye
... The tidal disruption of a solar type star by an IMBH with a mass of 2104Msoalr is proposed for the special event of GRB 060614, which is nearby long burst but is not associated with a supernova ...
... The tidal disruption of a solar type star by an IMBH with a mass of 2104Msoalr is proposed for the special event of GRB 060614, which is nearby long burst but is not associated with a supernova ...
Luminous Blue Variables are Antisocial: Their Isolation Implies that
... and the Large and Small Magellanic Clouds (LMC/SMC), and a similar number resides in other Local Group galaxies (Humphreys & Davidson 1994; van Genderen 2001; Smith et al. 2004; Clark et al. 2005). Stars that spectroscopically resemble LBVs with similar luminosity and color, but which have not (as y ...
... and the Large and Small Magellanic Clouds (LMC/SMC), and a similar number resides in other Local Group galaxies (Humphreys & Davidson 1994; van Genderen 2001; Smith et al. 2004; Clark et al. 2005). Stars that spectroscopically resemble LBVs with similar luminosity and color, but which have not (as y ...
Conceptual Integrated Science—Chapter 28
... Copyright © 2007 Pearson Education, Inc., publishing as Addison-Wesley ...
... Copyright © 2007 Pearson Education, Inc., publishing as Addison-Wesley ...
distance
... • If you know distance and you measure flux you can figure out total luminosity • Distance measurements that work to other galaxies: Cepheids — BRIGHT! Can see them out to ~40 Mpc ...
... • If you know distance and you measure flux you can figure out total luminosity • Distance measurements that work to other galaxies: Cepheids — BRIGHT! Can see them out to ~40 Mpc ...
The Milky Way-Pulsars and Isolated Neutron Stars
... from the Moon2 , they launched an Aerobee rocket on 12 June 1962 from White Sands (New Mexico) with three Geiger counters as payload, each having a ∼ 100◦ field of view and an effective collecting area of about 10 cm2 (Giacconi 1974). The experiment detected X-rays not from the Moon but from a sourc ...
... from the Moon2 , they launched an Aerobee rocket on 12 June 1962 from White Sands (New Mexico) with three Geiger counters as payload, each having a ∼ 100◦ field of view and an effective collecting area of about 10 cm2 (Giacconi 1974). The experiment detected X-rays not from the Moon but from a sourc ...
DUSTiNGS III: Distribution of Intermediate
... radial profiles, these studies report the presence of both intermediate-age and older populations in the outer regions of a sub-sample of the galaxies studied. In this study, we selected the nine nearby dwarf galaxies that host > 90% of the identified variable AGB star candidates from the larger DUS ...
... radial profiles, these studies report the presence of both intermediate-age and older populations in the outer regions of a sub-sample of the galaxies studied. In this study, we selected the nine nearby dwarf galaxies that host > 90% of the identified variable AGB star candidates from the larger DUS ...
SN 2006gy: DISCOVERY OF THE MOST LUMINOUS
... where the star’s core is obliterated instead of collapsing to a black hole. However, there are reasons to suspect that the mass-loss properties of stars in the local universe may not be so different from these early stars. Namely, recent studies of line-driven winds from O-type stars and WR stars ha ...
... where the star’s core is obliterated instead of collapsing to a black hole. However, there are reasons to suspect that the mass-loss properties of stars in the local universe may not be so different from these early stars. Namely, recent studies of line-driven winds from O-type stars and WR stars ha ...
Radial velocity planet detection biases at the stellar rotational period
... We note that the assumption that there is a linear relationship between the activity indicator and the stellar RV signal is a best-case scenario, and typically the relationship is more complex. We then injected planetary RV signals into the stellar activity plus photon noise time series we generated ...
... We note that the assumption that there is a linear relationship between the activity indicator and the stellar RV signal is a best-case scenario, and typically the relationship is more complex. We then injected planetary RV signals into the stellar activity plus photon noise time series we generated ...
The Rainbows of Gravity
... to enter the stage of an endless gravitational collapse without having any final equilibrium state. According to the Einstein theory of gravitation, the star goes on shrinking in its radius, reaching higher and higher densities. What would be the final fate of such an object according to the general ...
... to enter the stage of an endless gravitational collapse without having any final equilibrium state. According to the Einstein theory of gravitation, the star goes on shrinking in its radius, reaching higher and higher densities. What would be the final fate of such an object according to the general ...
YELLOW SUPERGIANTS IN THE ANDROMEDA GALAXY (M31)
... Local Group Galaxy Survey (LGGS), which imaged those Local Group galaxies with active star formation (Massey et al. 2006, 2007a, 2007b). On the other hand, recent advances in stellar evolutionary theory have demonstrated the important role that rotation plays in the evolution of massive stars (see, ...
... Local Group Galaxy Survey (LGGS), which imaged those Local Group galaxies with active star formation (Massey et al. 2006, 2007a, 2007b). On the other hand, recent advances in stellar evolutionary theory have demonstrated the important role that rotation plays in the evolution of massive stars (see, ...
Final Stages of Stellar Evolution - supernovae and the synthesis of
... supermassive black holes in center of most galaxies → collapse of dense cluster of stars large amouts of mass accreting onto stellar “seed” black hole fusion of smaller black holes masses up to 109 · M ...
... supermassive black holes in center of most galaxies → collapse of dense cluster of stars large amouts of mass accreting onto stellar “seed” black hole fusion of smaller black holes masses up to 109 · M ...
Metallicities of Planet Hosting Stars: A Sample of Giants and Subgiants
... would be supported by the lower metallicities of giants with planets, which having been enhanced on the MS, would be diluted by the deepening convection zones as the stars evolve up the red giant branch. An observational result that has been used as an argument in favor of the primordial enrichment ...
... would be supported by the lower metallicities of giants with planets, which having been enhanced on the MS, would be diluted by the deepening convection zones as the stars evolve up the red giant branch. An observational result that has been used as an argument in favor of the primordial enrichment ...
Here
... This work would not have been possible without the help and support of many people. I would like to take this opportunity to offer my thanks. First and foremost I would like to thank Chris for supervising me through the past three year. I have learnt much from him in this time, from the details of s ...
... This work would not have been possible without the help and support of many people. I would like to take this opportunity to offer my thanks. First and foremost I would like to thank Chris for supervising me through the past three year. I have learnt much from him in this time, from the details of s ...
XRaySNR_sm - Gettysburg College
... “optically thin”). In reality, the gas is probably dense enough in some regions to reabsorb the X-rays, and this changes the resulting spectrum. Including this in the models would have made the development of this activity impossible, and would not have substantively changed the results or the pedag ...
... “optically thin”). In reality, the gas is probably dense enough in some regions to reabsorb the X-rays, and this changes the resulting spectrum. Including this in the models would have made the development of this activity impossible, and would not have substantively changed the results or the pedag ...
Introduction to Dark Matter
... in the study of dark matter. The notion that gravity can bend rays of light was proposed already by Newton, although the magnitude of this effect cannot be correctly predicted by Newtonian gravity. Instead, the full machinery of Einstein´s theory of general relativity is required. In 1919, Eddington ...
... in the study of dark matter. The notion that gravity can bend rays of light was proposed already by Newton, although the magnitude of this effect cannot be correctly predicted by Newtonian gravity. Instead, the full machinery of Einstein´s theory of general relativity is required. In 1919, Eddington ...
Dust attenuation in galaxies up to redshift 2 V. Buat
... is well sampled with GALEX data. Buat et al. (2007) performed a statistical analysis of the GALEX and IRAS surveys and deduced volume corrected relations about farIR and FUV properties of galaxies in the nearby universe. Here, we use their UV selected sample to calculate the average far-IR to FUV fl ...
... is well sampled with GALEX data. Buat et al. (2007) performed a statistical analysis of the GALEX and IRAS surveys and deduced volume corrected relations about farIR and FUV properties of galaxies in the nearby universe. Here, we use their UV selected sample to calculate the average far-IR to FUV fl ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.