Pretty Pictures of the Cosmos
... Arp 188 and the Tadpole's Tidal Tail In this stunning image recorded with the Hubble Space Telescope, distant galaxies form a dramatic backdrop for disrupted spiral galaxy Arp 188, the Tadpole Galaxy. The cosmic Tadpole is a mere 420 million light-years distant toward the northern constellation Dra ...
... Arp 188 and the Tadpole's Tidal Tail In this stunning image recorded with the Hubble Space Telescope, distant galaxies form a dramatic backdrop for disrupted spiral galaxy Arp 188, the Tadpole Galaxy. The cosmic Tadpole is a mere 420 million light-years distant toward the northern constellation Dra ...
Improving the Gaia planet catch by combining the astrometry with
... amplitude of the signal caused by a planetary companion and compared it to the expected instrumental precisions. If the simulated signal was greater than the detection threshold of the instruments, we considered that the planet could be detected. The first step of our study was to determine the prec ...
... amplitude of the signal caused by a planetary companion and compared it to the expected instrumental precisions. If the simulated signal was greater than the detection threshold of the instruments, we considered that the planet could be detected. The first step of our study was to determine the prec ...
HR Diagram
... Uncheck show luminosity classes and check show instability strip. Note that this region of the HR Diagram indicates where pulsating stars are found such as RR Lyrae stars and Cepheid variable stars. These stars vary in brightness because they are pulsating – alternately growing bigger and smaller – ...
... Uncheck show luminosity classes and check show instability strip. Note that this region of the HR Diagram indicates where pulsating stars are found such as RR Lyrae stars and Cepheid variable stars. These stars vary in brightness because they are pulsating – alternately growing bigger and smaller – ...
How to Directly Image a Habitable Planet Around Alpha Centauri
... contrast space telescopes (blue region in Figure 1) appear to be necessary. High contrast space telescopes in the 1 - 2.4m size range are realistic for launch in the 2020 decade, such as NASA’s planned WFIRST-AFTA mission [1], as well as the Exo-C and Exo-S concept studies [2, 3]. Such telescopes ca ...
... contrast space telescopes (blue region in Figure 1) appear to be necessary. High contrast space telescopes in the 1 - 2.4m size range are realistic for launch in the 2020 decade, such as NASA’s planned WFIRST-AFTA mission [1], as well as the Exo-C and Exo-S concept studies [2, 3]. Such telescopes ca ...
MS 1512–CB58 - Columbia University Department of Astronomy
... Thanks to its gravitationally lensed nature, the z = 2.7276 galaxy MS 1512−cB58 (or cB58 for short) provides an unusually clear window on the population of starforming galaxies identified at these redshifts through the Lyman break technique (Steidel et al., 1996). Discovered by Yee et al. (1996), cB ...
... Thanks to its gravitationally lensed nature, the z = 2.7276 galaxy MS 1512−cB58 (or cB58 for short) provides an unusually clear window on the population of starforming galaxies identified at these redshifts through the Lyman break technique (Steidel et al., 1996). Discovered by Yee et al. (1996), cB ...
Measuring Starlight Deflection during the 2017 Eclipse: Repeating
... the first reference field is imaged 15 times in 30 seconds. The frame is shown on the right side of Figure 8. The figure is shown parallel to the sky’s right ascension axis, and should be rotated counterclockwise by 27° for correct orientation with the horizon. This makes this reference field slight ...
... the first reference field is imaged 15 times in 30 seconds. The frame is shown on the right side of Figure 8. The figure is shown parallel to the sky’s right ascension axis, and should be rotated counterclockwise by 27° for correct orientation with the horizon. This makes this reference field slight ...
Constellation Catalog
... Leo is fairly easy to find because the “pointer stars” of the Big Dipper point to Leo. It can be found by looking for the “sickle” starting at the Regulus star. It is located in the second quadrant of the Northern Hemisphere and can be seen at latitudes between +90 and -65. This constellation become ...
... Leo is fairly easy to find because the “pointer stars” of the Big Dipper point to Leo. It can be found by looking for the “sickle” starting at the Regulus star. It is located in the second quadrant of the Northern Hemisphere and can be seen at latitudes between +90 and -65. This constellation become ...
Is the central binary system of the planetary nebula Henize 2
... in Abell 48 whose central star is a WN star (Todt et al., 2013). Most interestingly, in the study by Weidmann and Gamen (2011) there are several PNe that show a wide He II 5412 Å absorption line with a weak emission feature in the center of the wide absorption line. This forms a spectral structure ...
... in Abell 48 whose central star is a WN star (Todt et al., 2013). Most interestingly, in the study by Weidmann and Gamen (2011) there are several PNe that show a wide He II 5412 Å absorption line with a weak emission feature in the center of the wide absorption line. This forms a spectral structure ...
Deriving the Isoradius Lines (optional, mathematical
... An actual HR Diagram is provided in the upper right panel with an active location indicated by a red x. This active location can be dragged around the diagram. The options panel allows you to control the variables plotted on the x-axis: (temperature, BV, or spectral type) and those plotted on the y- ...
... An actual HR Diagram is provided in the upper right panel with an active location indicated by a red x. This active location can be dragged around the diagram. The options panel allows you to control the variables plotted on the x-axis: (temperature, BV, or spectral type) and those plotted on the y- ...
A Jupiter-mass companion to a solar-type star
... of a very young object (younger than the Pleiades) and certainly not of an old disk star. Pulsation could easily yield low-amplitude velocity variations similar to the one observed, but would be accompanied by luminosity and colour variations as well as phase-related absorption line asymmetries. The ...
... of a very young object (younger than the Pleiades) and certainly not of an old disk star. Pulsation could easily yield low-amplitude velocity variations similar to the one observed, but would be accompanied by luminosity and colour variations as well as phase-related absorption line asymmetries. The ...
Manual - TUM
... the celestial north pole. The declination is equivalent to earth’s latitude, with the slight difference of ranging not from 90◦ N to 90◦ S, but from +90◦ to -90◦ . It is also measured in degrees and is subdivided into 60 arcminutes which are subdivided into 60 arcseconds respectively. The longitude ...
... the celestial north pole. The declination is equivalent to earth’s latitude, with the slight difference of ranging not from 90◦ N to 90◦ S, but from +90◦ to -90◦ . It is also measured in degrees and is subdivided into 60 arcminutes which are subdivided into 60 arcseconds respectively. The longitude ...
PDF format
... What is the significance of the main sequence? What are giants, supergiants, and white dwarfs? Why do the properties of some stars vary? ...
... What is the significance of the main sequence? What are giants, supergiants, and white dwarfs? Why do the properties of some stars vary? ...
PPS
... extreme of the classification, are blue-white and show features due to ionized helium in their spectra; G stars, which are much cooler and orange-yellow in colour, show strong lines associated with ionized calcium, and lines of metals such as iron. As spectroscopic techniques improved, it became pos ...
... extreme of the classification, are blue-white and show features due to ionized helium in their spectra; G stars, which are much cooler and orange-yellow in colour, show strong lines associated with ionized calcium, and lines of metals such as iron. As spectroscopic techniques improved, it became pos ...
Beers_First_Stars_NIC_School
... Super-Massive Stars W. Aoki, N. Tominaga, T. C. Beers, S. Honda, Y. S. Lee Abstract: Numerical simulations of structure formation in the early Universe predict the formation of some fraction of stars with masses several hundred times the solar mass. No clear evidence of supernovae from such supermas ...
... Super-Massive Stars W. Aoki, N. Tominaga, T. C. Beers, S. Honda, Y. S. Lee Abstract: Numerical simulations of structure formation in the early Universe predict the formation of some fraction of stars with masses several hundred times the solar mass. No clear evidence of supernovae from such supermas ...
3.2 Spectra and Spectral Classification
... Diagram showing the relationship between (a) absolute magnitude or luminosity and (b) spectral type or effective temperature (sometimes also color index) That means there exist different forms of this diagram, usually ● log L versus spectral type ● log L versus log T ● M versus B-V ...
... Diagram showing the relationship between (a) absolute magnitude or luminosity and (b) spectral type or effective temperature (sometimes also color index) That means there exist different forms of this diagram, usually ● log L versus spectral type ● log L versus log T ● M versus B-V ...
Gemini - www.BahaiStudies.net
... α Gem (Castor): the second brightest in the constellation after Pollux. Castor is a sextuple star system 52 light-years from Earth, which appears as a magnitude 1.6 blue-white star to the unaided eye. Two spectroscopic binaries are visible at magnitudes 1.9 and 3.0 with a period of 470 years. A wide ...
... α Gem (Castor): the second brightest in the constellation after Pollux. Castor is a sextuple star system 52 light-years from Earth, which appears as a magnitude 1.6 blue-white star to the unaided eye. Two spectroscopic binaries are visible at magnitudes 1.9 and 3.0 with a period of 470 years. A wide ...
Standards
... Have students complete the diagramming the stars worksheet to help them see where different stars are located on the H-R diagram. Students could complete the worksheet as groups or assign each group a question and have them complete the worksheet as a class. Students could individually complete the ...
... Have students complete the diagramming the stars worksheet to help them see where different stars are located on the H-R diagram. Students could complete the worksheet as groups or assign each group a question and have them complete the worksheet as a class. Students could individually complete the ...
Properties of Stars - Montana State University Extended University
... 7. What are two reasons why determining a star's temperature from Wien's law (see the electromagnetic radiation chapter) is usually not as accurate as using the spectral lines? 8. What are the 7 basic spectral types in order of temperature (hottest to coldest)? 9. If our Sun has a surface temperatur ...
... 7. What are two reasons why determining a star's temperature from Wien's law (see the electromagnetic radiation chapter) is usually not as accurate as using the spectral lines? 8. What are the 7 basic spectral types in order of temperature (hottest to coldest)? 9. If our Sun has a surface temperatur ...
STELLAR CLASSIFICATIONS: TYPE “O” STARS
... The one biggest plus to “M” class stars is that they live a very long time. 56 billion years on average. With lifespans more than 5 times that of the sun, there’s plenty of time for life to evolve around a star such as this. Color: These stars appear orange-red in the visible spectrum, but emit most ...
... The one biggest plus to “M” class stars is that they live a very long time. 56 billion years on average. With lifespans more than 5 times that of the sun, there’s plenty of time for life to evolve around a star such as this. Color: These stars appear orange-red in the visible spectrum, but emit most ...
shirley - Yancy L. Shirley`s Webpage
... SF in Dense Cores Star formation occurs within dense molecular cores High density gas in dense cores (n > 106 cm-3) Clumpy/filamentary structures within molecular cloud ...
... SF in Dense Cores Star formation occurs within dense molecular cores High density gas in dense cores (n > 106 cm-3) Clumpy/filamentary structures within molecular cloud ...
Constellation Detection
... Constellation is a convention that people used to partition the stars with myth and stories behind each constellation, making the starry sky more compelling. However, the constellation detection requires complicated knowledge and experience. Our team’s goal is to automatically detect the constellati ...
... Constellation is a convention that people used to partition the stars with myth and stories behind each constellation, making the starry sky more compelling. However, the constellation detection requires complicated knowledge and experience. Our team’s goal is to automatically detect the constellati ...
A Search for New Solar-Type Post-T Tauri Stars in
... young stars have been identified in each of these regions based on various techniques including objective prism surveys for chromospherically active Hα and CaII emission-line sources, the IRAS survey for objects with substantial mid-infrared excess due to circumstellar dust, and the ROSAT survey for ...
... young stars have been identified in each of these regions based on various techniques including objective prism surveys for chromospherically active Hα and CaII emission-line sources, the IRAS survey for objects with substantial mid-infrared excess due to circumstellar dust, and the ROSAT survey for ...
THE ORION CONSTELLATION the Great Hunter
... 2. Betelgeuse (Alpha Orionis) is the second brightest star in Orion and the eighth brightest star in the sky. It is a red supergiant, belonging to the spectral class M2lab. The star has an apparent visual magnitude of 0.42 and is approximately 643 light years distant. Betelgeuse is one of the most l ...
... 2. Betelgeuse (Alpha Orionis) is the second brightest star in Orion and the eighth brightest star in the sky. It is a red supergiant, belonging to the spectral class M2lab. The star has an apparent visual magnitude of 0.42 and is approximately 643 light years distant. Betelgeuse is one of the most l ...
Boötes
Boötes /boʊˈoʊtiːz/ is a constellation in the northern sky, located between 0° and +60° declination, and 13 and 16 hours of right ascension on the celestial sphere. The name comes from the Greek Βοώτης, Boōtēs, meaning herdsman or plowman (literally, ox-driver; from βοῦς bous “cow”). The ""ö"" in the name is a diaeresis, not an umlaut, meaning that each 'o' is to be pronounced separately.One of the 48 constellations described by the 2nd century astronomer Ptolemy, Boötes is now one of the 88 modern constellations. It contains the fourth brightest star in the night sky, the orange-hued Arcturus. Boötes is home to many other bright stars, including eight above the fourth magnitude and an additional 21 above the fifth magnitude, making a total of 29 stars easily visible to the naked eye.