Neutron Stars and Black Holes
... Both stars have the same average apparent brightness. The star in galaxy A has a bright-dim-bright period of 10 days, while the one in galaxy B has a bright-dim-bright period of 30 days. Which of the two galaxies is at a greater distance from us? a) ...
... Both stars have the same average apparent brightness. The star in galaxy A has a bright-dim-bright period of 10 days, while the one in galaxy B has a bright-dim-bright period of 30 days. Which of the two galaxies is at a greater distance from us? a) ...
Formation of cold gas filaments from colliding superbubbles
... and low temperatures (T < 300 K). In particular, we want to explore the mechanisms that can lead to the filamentary structure typical of these clouds. A natural mechanism for the formation of large amounts of cold gas in a small region are converging flows. This type of problem has been studied exte ...
... and low temperatures (T < 300 K). In particular, we want to explore the mechanisms that can lead to the filamentary structure typical of these clouds. A natural mechanism for the formation of large amounts of cold gas in a small region are converging flows. This type of problem has been studied exte ...
ISOCAM 4 m imaging of the nuclear starburst in M83
... the dust thermal emission; c) near- and mid-IR radiations give complementary information on the stellar photospheric emission and on the nebular emission from the ionized gas. Imaging at a good angular resolution is needed to establish the potential link between the different components that may be ...
... the dust thermal emission; c) near- and mid-IR radiations give complementary information on the stellar photospheric emission and on the nebular emission from the ionized gas. Imaging at a good angular resolution is needed to establish the potential link between the different components that may be ...
Brans-Dicke Boson Stars: Configurations and Stability through
... present value of the gravitational coupling, and it would appear a great coincidence that the transition between instability and stability should occur at a recent cosmic epoch. In fact, their result has already been questioned by Whinnett [22], in a detailed discussion of the meaning of the boson ...
... present value of the gravitational coupling, and it would appear a great coincidence that the transition between instability and stability should occur at a recent cosmic epoch. In fact, their result has already been questioned by Whinnett [22], in a detailed discussion of the meaning of the boson ...
Planetary Nebula
... sculpting the visible Cat's Eye filaments and structures. Gazing into the Cat's Eye, astronomers see the fate of our sun, destined to enter its own planetary nebula phase of evolution ... in about 5 billion years. ...
... sculpting the visible Cat's Eye filaments and structures. Gazing into the Cat's Eye, astronomers see the fate of our sun, destined to enter its own planetary nebula phase of evolution ... in about 5 billion years. ...
Preface 1 PDF
... In this sense the study of rotation in other stars will help further our understanding of magnetic activity on the Sun. The NASA Kepler mission observed a multitude of Sun-like stars over a period of four years. This has provided high-quality photometric data that can be used to study the rotation o ...
... In this sense the study of rotation in other stars will help further our understanding of magnetic activity on the Sun. The NASA Kepler mission observed a multitude of Sun-like stars over a period of four years. This has provided high-quality photometric data that can be used to study the rotation o ...
Chapter 3 Cosmology 3.1 The Doppler effect
... AQA Physics Dark energy Astronomers in 1998 studying type Ia supernovae were astounded when they discovered very distant supernovae much further away than expected. To reach such distances, the supernovae must have been accelerating. The astronomers concluded that the expansion of the Universe is ac ...
... AQA Physics Dark energy Astronomers in 1998 studying type Ia supernovae were astounded when they discovered very distant supernovae much further away than expected. To reach such distances, the supernovae must have been accelerating. The astronomers concluded that the expansion of the Universe is ac ...
On the evolution and fate of supermassive stars
... Context. We study the evolution and fate of solar composition super-massive stars in the mass range 60 — 1000 M⊙ . Our study is relevant for very massive objects observed in young stellar complexes as well as for super-massive stars that could potentially form through runaway stellar collisions. Aim ...
... Context. We study the evolution and fate of solar composition super-massive stars in the mass range 60 — 1000 M⊙ . Our study is relevant for very massive objects observed in young stellar complexes as well as for super-massive stars that could potentially form through runaway stellar collisions. Aim ...
Search for giant planets in M67 - III. Excess of hot Jupiters in dense
... of HJs in M67 or in OCs in general originates from the higher mass of the host star can be also excluded: the stars hosting HJs in M67 all have masses around one solar mass, which is very similar to the masses of the HJ hosts discovered in the field. A similar argument holds for the stars hosting HJ ...
... of HJs in M67 or in OCs in general originates from the higher mass of the host star can be also excluded: the stars hosting HJs in M67 all have masses around one solar mass, which is very similar to the masses of the HJ hosts discovered in the field. A similar argument holds for the stars hosting HJ ...
Lecture1-1
... The actual measured data (left) and constructed models (model) are compared on the Dn(4000), HdA index plane. The solid lines in the left panels are tracks of burst star formation model and the points are “continuus” star formation model. ...
... The actual measured data (left) and constructed models (model) are compared on the Dn(4000), HdA index plane. The solid lines in the left panels are tracks of burst star formation model and the points are “continuus” star formation model. ...
17.1 Introduction
... Further complications are: interstellar reddening, which can be mitigated by observations at infrared wavelengths; crowding of stellar images (this is where HST played a key role with its superior spatial resolution); and the dependence of the PLC relation on the metallicity of the stars. Concerning ...
... Further complications are: interstellar reddening, which can be mitigated by observations at infrared wavelengths; crowding of stellar images (this is where HST played a key role with its superior spatial resolution); and the dependence of the PLC relation on the metallicity of the stars. Concerning ...
Classification_of_Stars_By_Luminosity
... He called the brightest stars in the sky first magnitude and the dimmest visible to the naked eye sixth magnitude. Stars of intermediate brightness were given intermediate values. ...
... He called the brightest stars in the sky first magnitude and the dimmest visible to the naked eye sixth magnitude. Stars of intermediate brightness were given intermediate values. ...
SGHS Faulkes ASISTM Star Cluster Photometry
... value you measured for star 1 must be recorded with the V value for that same star. The spreadsheet I have made you makes this a bit easier but using the images in this document to write down which star is star 1 etc is essential. So … if you are thinking it is going to be a lot of boring calculatio ...
... value you measured for star 1 must be recorded with the V value for that same star. The spreadsheet I have made you makes this a bit easier but using the images in this document to write down which star is star 1 etc is essential. So … if you are thinking it is going to be a lot of boring calculatio ...
parallax
... experiment above. How does the parallax (the apparent shift of the position of your finger) change as your finger is moved closer to your ...
... experiment above. How does the parallax (the apparent shift of the position of your finger) change as your finger is moved closer to your ...
6 March 2013 Exoplanets and Where to Find Them Professor
... in the night sky are all part of the Milky Way, and many of these are not so different from our Sun; each and every one of these 100 billion stars or so is potential host for exoplanets. Star Birth The Galaxy is continually evolving and changing, albeit on the astronomical timescale of millions of y ...
... in the night sky are all part of the Milky Way, and many of these are not so different from our Sun; each and every one of these 100 billion stars or so is potential host for exoplanets. Star Birth The Galaxy is continually evolving and changing, albeit on the astronomical timescale of millions of y ...
Document
... in SNRs, GMCs, Galactic Plane/Bulge, Nearby galaxies, Nearby Clusters Separation of electron contribution (brems. and IC) and proton contribution (pi-0) is important. Association of SNRs, history of the galaxy or the cluster Even in galactic level, the total energy of cosmic-ray is non-negligibl ...
... in SNRs, GMCs, Galactic Plane/Bulge, Nearby galaxies, Nearby Clusters Separation of electron contribution (brems. and IC) and proton contribution (pi-0) is important. Association of SNRs, history of the galaxy or the cluster Even in galactic level, the total energy of cosmic-ray is non-negligibl ...
Supermassive Black Holes and the Growth of Galaxies
... present observations have revealed two separate types of black holes. The first have relatively small masses, roughly tens of times that of the Sun, which we can observe in binary orbits around normal stars. In many such systems, the normal star has run out of hydrogen fuel in its core and begins to ...
... present observations have revealed two separate types of black holes. The first have relatively small masses, roughly tens of times that of the Sun, which we can observe in binary orbits around normal stars. In many such systems, the normal star has run out of hydrogen fuel in its core and begins to ...
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.