Chapter 12 - Indiana State University
... Temperature’s Effect on Spectra • Consequently, absorption lines will be present or absent depending on the presence or absence of an electron at the right energy level and this is very much dependent on temperature • Adjusting for temperature, a star’s composition can be found – interestingly, vir ...
... Temperature’s Effect on Spectra • Consequently, absorption lines will be present or absent depending on the presence or absence of an electron at the right energy level and this is very much dependent on temperature • Adjusting for temperature, a star’s composition can be found – interestingly, vir ...
File - Mr. Catt`s Class
... the instability strip, while RR Lyrae variables result from low mass stars. 6. In some cases stellar pulsations can be so large that the star loses its outer layers to outer space. ...
... the instability strip, while RR Lyrae variables result from low mass stars. 6. In some cases stellar pulsations can be so large that the star loses its outer layers to outer space. ...
Supplementary Information
... The optical photometry was obtained with the Suprime Camera at the SUBARU telescope in the B, R, I, and z bands, and the near-infrared J and Ks band photometry was collected with SOFI at the ESO New Technology Telescope (7). The data are complemented with optical U and V band photometry obtained as ...
... The optical photometry was obtained with the Suprime Camera at the SUBARU telescope in the B, R, I, and z bands, and the near-infrared J and Ks band photometry was collected with SOFI at the ESO New Technology Telescope (7). The data are complemented with optical U and V band photometry obtained as ...
What we can measure
... and watch one orbit the other. These are called visual binaries. We need to be careful here, since some stars only appear to be close due to our perspective. These are called “optical doubles” and not real binary systems at all. We can tell the difference by watching these over time or by noting tha ...
... and watch one orbit the other. These are called visual binaries. We need to be careful here, since some stars only appear to be close due to our perspective. These are called “optical doubles” and not real binary systems at all. We can tell the difference by watching these over time or by noting tha ...
Document
... Galaxy, but for the vast majority, the separation of the stars is large enough that one star doesn’t affect the evolution of the other(s). ...
... Galaxy, but for the vast majority, the separation of the stars is large enough that one star doesn’t affect the evolution of the other(s). ...
Chapter three: The properties of Stars
... From Eq.(3.1), we see that, when P=1’’, d = 1pc , 1pc = 3.086 1013km is the distance of the object when it subtends a parallax angle of one arc second to the observer on the surface of the Earth. We can also find the relation between the parsec and another astronomical length unit, the light year: ...
... From Eq.(3.1), we see that, when P=1’’, d = 1pc , 1pc = 3.086 1013km is the distance of the object when it subtends a parallax angle of one arc second to the observer on the surface of the Earth. We can also find the relation between the parsec and another astronomical length unit, the light year: ...
PPTX
... HST images of V605 Aql in [O III] 5007 obtained in 1991 (pre-COSTAR FOC), 2001 (WFPC2/WF3), and 2009 (WFPC2/PC). Each panel is 3″.6 wide. Note expansion of nebula from 2001 to 2009. ...
... HST images of V605 Aql in [O III] 5007 obtained in 1991 (pre-COSTAR FOC), 2001 (WFPC2/WF3), and 2009 (WFPC2/PC). Each panel is 3″.6 wide. Note expansion of nebula from 2001 to 2009. ...
AAVSO: Mu Cephei, October 2002 Variable Star Of The Month
... The star of the month this month is the famous, interesting and extremely bright red supergiant in the constellation Cepheus, Mu Cephei. This star may be the largest star visible to the naked eye - it is roughly 2.4 billion miles across! If it replaced our Sun, it would extend beyond the orbit of Sa ...
... The star of the month this month is the famous, interesting and extremely bright red supergiant in the constellation Cepheus, Mu Cephei. This star may be the largest star visible to the naked eye - it is roughly 2.4 billion miles across! If it replaced our Sun, it would extend beyond the orbit of Sa ...
pkt 14 Astrophysics
... appear to be near each other in space. Nebula is an interstellar cloud of dust, hydrogen gas and plasma. It is the first stage of a star's cycle but it can also refer to the remains of a dying star (planetary nebula). Originally nebula was a general name for any extended astronomical object, includi ...
... appear to be near each other in space. Nebula is an interstellar cloud of dust, hydrogen gas and plasma. It is the first stage of a star's cycle but it can also refer to the remains of a dying star (planetary nebula). Originally nebula was a general name for any extended astronomical object, includi ...
Moitinho et al. - Wiley Online Library
... L. Bronfman ahead of publication and also from their previous survey; May, Alvarez & Bronfman 1997). Only clouds more massive then 0.5 × 105 M are shown. The remarkable coincidence of stars and clouds in the outer arm, already stressed by us (Carraro et al. 2005), lends further support to the inter ...
... L. Bronfman ahead of publication and also from their previous survey; May, Alvarez & Bronfman 1997). Only clouds more massive then 0.5 × 105 M are shown. The remarkable coincidence of stars and clouds in the outer arm, already stressed by us (Carraro et al. 2005), lends further support to the inter ...
March 15 Newsletter
... I move still closer. I move to within 93 million miles of the pulsar, the distance from the Earth to the Sun. The pulsations are overwhelming. On average the illumination is brighter than sunlight: concentrated into bursts, the level of each is blinding. A storm of radiation- electrons and protons p ...
... I move still closer. I move to within 93 million miles of the pulsar, the distance from the Earth to the Sun. The pulsations are overwhelming. On average the illumination is brighter than sunlight: concentrated into bursts, the level of each is blinding. A storm of radiation- electrons and protons p ...
Stars (Ch. 13)
... right of the figure are very luminous but also very cool. Therefore they must be very large. These are the Red Giant stars. • Those stars in the lower left are very hot but have low luminosity. They must be very small. These are Betelgeuse is almost as big as the orbit White Dwarf stars. of Jupiter. ...
... right of the figure are very luminous but also very cool. Therefore they must be very large. These are the Red Giant stars. • Those stars in the lower left are very hot but have low luminosity. They must be very small. These are Betelgeuse is almost as big as the orbit White Dwarf stars. of Jupiter. ...
PPT 15MB - HubbleSOURCE
... Amazing network of long, straight filaments seen in great detail for first time in ionized gas; some of them follow magnetic field lines; New compact nebulae discovered with young massive stars, ranging from early to late stages of star formation Many candidate massive stars identified by brig ...
... Amazing network of long, straight filaments seen in great detail for first time in ionized gas; some of them follow magnetic field lines; New compact nebulae discovered with young massive stars, ranging from early to late stages of star formation Many candidate massive stars identified by brig ...
Photoelectric Photometry of the Pleiades Student Manual
... You will use this instrument to collect data on 24 stars in the region of the Pleiades star cluster. The apparent magnitudes will be measured for each star, in each of three colors. We will assume all of these stars are approximately the same distance away. This is a necessary assumption, and reason ...
... You will use this instrument to collect data on 24 stars in the region of the Pleiades star cluster. The apparent magnitudes will be measured for each star, in each of three colors. We will assume all of these stars are approximately the same distance away. This is a necessary assumption, and reason ...
88K PDF file
... 3. Chapter 12, Question 5: Albiero, a star in the constellation Cygnus, is a binary system whose components are easily separated in a small amateur telescope. Viewers describe the brighter star as “golden” and the fainter one as “sapphire blue” (a) What does this tell you about the relative tempera ...
... 3. Chapter 12, Question 5: Albiero, a star in the constellation Cygnus, is a binary system whose components are easily separated in a small amateur telescope. Viewers describe the brighter star as “golden” and the fainter one as “sapphire blue” (a) What does this tell you about the relative tempera ...
AST301.Ch18.InterstelMed - University of Texas Astronomy
... Also, because this is a spectral line (unlike dust, which gives us only continuous absorption), we can get radial velocities of the gas motions this way (Fig. 18.18). The results show that our galaxy has an overall rotation (we’ll return to this later—this rotation is one of the primary indicators o ...
... Also, because this is a spectral line (unlike dust, which gives us only continuous absorption), we can get radial velocities of the gas motions this way (Fig. 18.18). The results show that our galaxy has an overall rotation (we’ll return to this later—this rotation is one of the primary indicators o ...
Lecture-25 Notes - Georgia Southern University Astrophysics
... are indicated (they are fairly bright stars, but hard to! see even during an eclipse).! Comparisons of the four star’s positions at a later date! (when the Sun wasn’t around!) show that they indeed! changed positions in 100% agreement with Einstein’s! Theory of Relativity (Albert was sweating bullet ...
... are indicated (they are fairly bright stars, but hard to! see even during an eclipse).! Comparisons of the four star’s positions at a later date! (when the Sun wasn’t around!) show that they indeed! changed positions in 100% agreement with Einstein’s! Theory of Relativity (Albert was sweating bullet ...
Multiple Choice, continued Stars, Galaxies, and the Universe
... that light travels through space in 1 year. Because the speed of light through space is about 300,000 km/ s, light travels approximately 9.46 trillion kilometers in one year. Even after astronomers figured out that stars were far from Earth, the nature of the universe was hard to understand. Some as ...
... that light travels through space in 1 year. Because the speed of light through space is about 300,000 km/ s, light travels approximately 9.46 trillion kilometers in one year. Even after astronomers figured out that stars were far from Earth, the nature of the universe was hard to understand. Some as ...
Supernova Stalking - Susanna Kumlien Reportage
... explosions being uncommon. We must therefore observe many galaxies. The unique feature of our project is that we scan the same part of the sky more often. In this way, we find supernovae shortly after they exploded.” Since last year, the Stockholm team is part of a global enterprise, involving resea ...
... explosions being uncommon. We must therefore observe many galaxies. The unique feature of our project is that we scan the same part of the sky more often. In this way, we find supernovae shortly after they exploded.” Since last year, the Stockholm team is part of a global enterprise, involving resea ...
Far Ultraviolet Spectroscopic Explorer
... Search data set for interesting individual objects that represent rare classes of objects. ...
... Search data set for interesting individual objects that represent rare classes of objects. ...
a new isotopic abundance anomaly in chemically peculiar stars
... The stars with isotopic anomalies are members of a diverse group with unusual and sometimes bizarre surface compositions. They are now called CP stars, where the “CP” stands for chemically peculiar. This notation was introduced to describe chemically peculiar main-sequence stars – stars still conver ...
... The stars with isotopic anomalies are members of a diverse group with unusual and sometimes bizarre surface compositions. They are now called CP stars, where the “CP” stands for chemically peculiar. This notation was introduced to describe chemically peculiar main-sequence stars – stars still conver ...
The Rigel Star - Emmi
... angry about the death of her companion, but forgave Apollo when he helped her hang his image in the sky so that he wouldn’t be forgotten. The Greeks said that this is why the constellation of Orion is visible in the winter, but wavers and vanishes when Scorpio appears in the summer. ...
... angry about the death of her companion, but forgave Apollo when he helped her hang his image in the sky so that he wouldn’t be forgotten. The Greeks said that this is why the constellation of Orion is visible in the winter, but wavers and vanishes when Scorpio appears in the summer. ...
Astrophysics - Part 2
... Stefan’s law and Wien’s displacement law.General shape of black body curves, experimental verification is not required. Use of Wien’s displacement law to estimate black-body temperature of sources λmaxT = constant = 2.9 × 10-3 mK. Inverse square law, assumptions in its application. Use of Stefan’s l ...
... Stefan’s law and Wien’s displacement law.General shape of black body curves, experimental verification is not required. Use of Wien’s displacement law to estimate black-body temperature of sources λmaxT = constant = 2.9 × 10-3 mK. Inverse square law, assumptions in its application. Use of Stefan’s l ...
Serpens
Serpens (""the Serpent"", Greek Ὄφις) is a constellation of the northern hemisphere. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations defined by the International Astronomical Union. It is unique among the modern constellations in being split into two non-contiguous parts, Serpens Caput (Serpent's Head) to the west and Serpens Cauda (Serpent's Tail) to the east. Between these two halves lies the constellation of Ophiuchus, the ""Serpent-Bearer"". In figurative representations, the body of the serpent is represented as passing behind Ophiuchus between Mu Serpentis in Serpens Caput and Nu Serpentis in Serpens Cauda.The brightest star in Serpens is the red giant star Alpha Serpentis, or Unukalhai, in Serpens Caput, with an apparent magnitude of 2.63. Also located in Serpens Caput are the naked-eye globular cluster Messier 5 and the naked-eye variables R Serpentis and Tau4 Serpentis. Notable extragalactic objects include Seyfert's Sextet, one of the densest galaxy clusters known; Arp 220, the prototypical ultraluminous infrared galaxy; and Hoag's Object, the most famous of the very rare class of galaxies known as ring galaxies.Part of the Milky Way's galactic plane passes through Serpens Cauda, which is therefore rich in galactic deep-sky objects, such as the Eagle Nebula (IC 4703) and its associated star cluster Messier 16. The nebula measures 70 light-years by 50 light-years and contains the Pillars of Creation, three dust clouds that became famous for the image taken by the Hubble Space Telescope. Other striking objects include the Red Square Nebula, one of the few objects in astronomy to take on a square shape; and Westerhout 40, a massive nearby star-forming region consisting of a molecular cloud and an H II region.