Supernovae and Gamma-Ray Bursts (draft)
... scheme. The progenitor of supernova 1987A (SN 1987A, see § 4) had a large H-rich envelope, but did not have an extended plateau phase (see Fig. 3) and therefore SN 1987A defines a class of its own. Other supernovae appear to change their type. Supernova 1993J initially looked like a type II supernov ...
... scheme. The progenitor of supernova 1987A (SN 1987A, see § 4) had a large H-rich envelope, but did not have an extended plateau phase (see Fig. 3) and therefore SN 1987A defines a class of its own. Other supernovae appear to change their type. Supernova 1993J initially looked like a type II supernov ...
Comparing stars - The Open University
... the red giant is dominant.) Above and to the left of the red giants we come to the supergiants. These are larger, and thus more luminous than red giants of comparable temperature, but they also extend to higher temperatures, where they are larger and more luminous than main sequence stars of compara ...
... the red giant is dominant.) Above and to the left of the red giants we come to the supergiants. These are larger, and thus more luminous than red giants of comparable temperature, but they also extend to higher temperatures, where they are larger and more luminous than main sequence stars of compara ...
Chemical abundances and winds of massive stars in M31: a B
... (WLR, e.g. Kudritzki et al. 1999). An investigation of the stellar wind properties of O-, B- and A-supergiants in Local Group galaxies with well defined distances will, therefore, allow us to test the concept of the WLR and its applicability for distance determinations. Numerous surveys have identif ...
... (WLR, e.g. Kudritzki et al. 1999). An investigation of the stellar wind properties of O-, B- and A-supergiants in Local Group galaxies with well defined distances will, therefore, allow us to test the concept of the WLR and its applicability for distance determinations. Numerous surveys have identif ...
12-1 - Piscataway High School
... makes star images about 1 second of arc in diameter, and that makes it difficult to measure parallax from Earth’s surface. Even when astronomers average together many observations, they cannot measure parallax with an uncertainty smaller than about 0.002 arc second. If you measure a parallax of 0.02 ...
... makes star images about 1 second of arc in diameter, and that makes it difficult to measure parallax from Earth’s surface. Even when astronomers average together many observations, they cannot measure parallax with an uncertainty smaller than about 0.002 arc second. If you measure a parallax of 0.02 ...
Chemical abundances and winds of massive stars in M31: a Btype
... (1987), although little quantitative analysis has been carried out to date. The only detailed studies of Wolf – Rayet stars beyond the Magellanic Clouds have been studies of late WN stars in M33 by Smith et al. (1995) and Crowther et al. (1997). Bianchi et al. (1996b) have published UV spectroscopy ...
... (1987), although little quantitative analysis has been carried out to date. The only detailed studies of Wolf – Rayet stars beyond the Magellanic Clouds have been studies of late WN stars in M33 by Smith et al. (1995) and Crowther et al. (1997). Bianchi et al. (1996b) have published UV spectroscopy ...
Science East Meteor Radiant Worksheet finished
... Activity Period: the dates when the Zenith Hourly Rates are equal to or greater than one per hour. Maximum Date: the date on which the maximum meteor activity is expected to occur. Zenith Hourly Rate: the average maximum number of shower meteors visible per hour if the radiant is located ...
... Activity Period: the dates when the Zenith Hourly Rates are equal to or greater than one per hour. Maximum Date: the date on which the maximum meteor activity is expected to occur. Zenith Hourly Rate: the average maximum number of shower meteors visible per hour if the radiant is located ...
The Nature of the Stars
... The closer the object you are You measure distances viewing, the greater the parallax shift. To see this, repeat the experiment around you by comparing with your hand held closer to your the images from your face. Your brain analyzes such paral- left and right eyes—we lax shifts constantly as it com ...
... The closer the object you are You measure distances viewing, the greater the parallax shift. To see this, repeat the experiment around you by comparing with your hand held closer to your the images from your face. Your brain analyzes such paral- left and right eyes—we lax shifts constantly as it com ...
Rotational Doppler beaming in eclipsing binaries
... Van Kerkwijk et al. (2010). As the star spins on its rotational axis half of the star will be moving towards the observer and half of it will be moving away from the observer. In non-eclipse conditions and for axisymmetric stars the combined beaming effect of these two halves exactly cancels. Howeve ...
... Van Kerkwijk et al. (2010). As the star spins on its rotational axis half of the star will be moving towards the observer and half of it will be moving away from the observer. In non-eclipse conditions and for axisymmetric stars the combined beaming effect of these two halves exactly cancels. Howeve ...
binary stars instructor notes
... consisting of two stars, both classified as spectral type G5 V with magnitudes V = 6.26 and V = 6.36, having an orbital period of P = 25.0 years and a semi-major axis a = 0".67. Assume bolometric corrections of BC = –0.05 for G5 V stars and that the system is close enough to be unreddened by ...
... consisting of two stars, both classified as spectral type G5 V with magnitudes V = 6.26 and V = 6.36, having an orbital period of P = 25.0 years and a semi-major axis a = 0".67. Assume bolometric corrections of BC = –0.05 for G5 V stars and that the system is close enough to be unreddened by ...
Early-type stars in the core of the young open cluster Westerlund 2
... and the very massive Wolf-Rayet binary WR 20a as well as the H complex RCW 49. Methods. Photometric monitoring as well as spectroscopic observations of Westerlund 2 are used to search for light variability and to establish the spectral types of the early-type stars in the cluster core. Results. T ...
... and the very massive Wolf-Rayet binary WR 20a as well as the H complex RCW 49. Methods. Photometric monitoring as well as spectroscopic observations of Westerlund 2 are used to search for light variability and to establish the spectral types of the early-type stars in the cluster core. Results. T ...
File
... Nephele, king Athamas’s first wife, died the king took a new wife named Ino. Ino had an incredibly deep hate for her new step children and had to find a way to get rid of them. After thinking and thinking Ino had finally came up with the perfect plan and was ready to set it into action! The only pro ...
... Nephele, king Athamas’s first wife, died the king took a new wife named Ino. Ino had an incredibly deep hate for her new step children and had to find a way to get rid of them. After thinking and thinking Ino had finally came up with the perfect plan and was ready to set it into action! The only pro ...
Lithium abundances along the red giant branch: FLAMES
... agreed with the expected value for the difference in heliocentric correction, and the same shift was found for all spectra obtained at a given time. Therefore, we can exclude that these shifts are the result of orbital motion in a binary system. No other velocity shifts were found within the accuracy ...
... agreed with the expected value for the difference in heliocentric correction, and the same shift was found for all spectra obtained at a given time. Therefore, we can exclude that these shifts are the result of orbital motion in a binary system. No other velocity shifts were found within the accuracy ...
100 Binocular Deep Sky Objects
... A separate category is needed for all the galaxy pairs in the Virgo/Coma Area that include some extremely difficult NGCs. (I need a detailed chart handy to name those), but even when I can’t find most others, I can see M58 and M60, because they are located just north of a triangular asterism with a ...
... A separate category is needed for all the galaxy pairs in the Virgo/Coma Area that include some extremely difficult NGCs. (I need a detailed chart handy to name those), but even when I can’t find most others, I can see M58 and M60, because they are located just north of a triangular asterism with a ...
Evolution of stars
... b. upper left corner c. upper right corner d. lower left corner e. lower right corner 6. In the H-R diagram, 90 percent of all stars are a. in the giant region. b. in the supergiant region. c. among the B stars. d. among the G stars. e. on the main sequence. 7. We know that giant stars are larger in ...
... b. upper left corner c. upper right corner d. lower left corner e. lower right corner 6. In the H-R diagram, 90 percent of all stars are a. in the giant region. b. in the supergiant region. c. among the B stars. d. among the G stars. e. on the main sequence. 7. We know that giant stars are larger in ...
Activity III: Calibrating Images
... by astronomers. The magnitude scale is inverse, meaning brighter stars have lower magnitudes. Absolute Magnitude - This quantity is analogous to the luminosity but is expressed on the magnitude scale. ...
... by astronomers. The magnitude scale is inverse, meaning brighter stars have lower magnitudes. Absolute Magnitude - This quantity is analogous to the luminosity but is expressed on the magnitude scale. ...
a changing cosmos - Whittier Union High School District
... nebula which led him to conclude that it had been expanding for about 900 years. The connection with the “guest star” of 1054 was clear. The “guest star” was actually a supernova—exploding star— and the Crab nebula, the supernova remnant, consists of the material ejected in the supernova explosion w ...
... nebula which led him to conclude that it had been expanding for about 900 years. The connection with the “guest star” of 1054 was clear. The “guest star” was actually a supernova—exploding star— and the Crab nebula, the supernova remnant, consists of the material ejected in the supernova explosion w ...
