sections 19-22 instructor notes
... The maximum and/or minimum observed radial velocities of hydrogen clouds along such lines of sight in the 1st and 4th quadrants, respectively, must originate from gas located at the tangent points, if there is any. In general terms there will always be some hydrogen gas at the tangent points, but t ...
... The maximum and/or minimum observed radial velocities of hydrogen clouds along such lines of sight in the 1st and 4th quadrants, respectively, must originate from gas located at the tangent points, if there is any. In general terms there will always be some hydrogen gas at the tangent points, but t ...
Document
... • Long-Soft bursts: Collapsar model • Death of a massive (> 40 Msun), rotating, low-metallicity star: • Massive for a corecollapse forming a BH • Rotating to drive a pair of jet along the rotation axis • Low-metallicity to retain mass an angular momentum SASS ...
... • Long-Soft bursts: Collapsar model • Death of a massive (> 40 Msun), rotating, low-metallicity star: • Massive for a corecollapse forming a BH • Rotating to drive a pair of jet along the rotation axis • Low-metallicity to retain mass an angular momentum SASS ...
Astronomy Astrophysics Circumstellar emission in Be/X-ray binaries of the Magellanic
... Aims. We study the optical and near-infrared colour excesses produced by circumstellar emission in a sample of Be/X-ray binaries. Our main goals are exploring whether previously published relations, valid for isolated Be stars, are applicable to Be/X-ray binaries and computing the distance to these ...
... Aims. We study the optical and near-infrared colour excesses produced by circumstellar emission in a sample of Be/X-ray binaries. Our main goals are exploring whether previously published relations, valid for isolated Be stars, are applicable to Be/X-ray binaries and computing the distance to these ...
Article PDF - IOPscience
... galaxies, as seen through their stellar light distributions, contain enough physical information to offer this classification. We argue through the use of 240 images of nearby galaxies that three model-independent parameters measured on a single galaxy image reveal its major ongoing and past formation ...
... galaxies, as seen through their stellar light distributions, contain enough physical information to offer this classification. We argue through the use of 240 images of nearby galaxies that three model-independent parameters measured on a single galaxy image reveal its major ongoing and past formation ...
Spectroscopy: Unlocking the Secrets of Star Light
... as a galaxy or of s specific star in the telescope's field of view. Light is then collimated (made parallel) before hitting a diffraction grating. This disperses the light into component wavelengths which can then by focused by a camera mirror into a detector such as a charged-couple device (CCD). B ...
... as a galaxy or of s specific star in the telescope's field of view. Light is then collimated (made parallel) before hitting a diffraction grating. This disperses the light into component wavelengths which can then by focused by a camera mirror into a detector such as a charged-couple device (CCD). B ...
Spectroscopy: Unlocking the Secrets of Star Light
... as a galaxy or of s specific star in the telescope's field of view. Light is then collimated (made parallel) before hitting a diffraction grating. This disperses the light into component wavelengths which can then by focused by a camera mirror into a detector such as a charged-couple device (CCD). B ...
... as a galaxy or of s specific star in the telescope's field of view. Light is then collimated (made parallel) before hitting a diffraction grating. This disperses the light into component wavelengths which can then by focused by a camera mirror into a detector such as a charged-couple device (CCD). B ...
LOCALIZATION AND OBSERVATIONS OF GRB010921 BY THE …
... resembling light curve of SN 1998bw Spectra taken close to maximum show extremely broad features as in SN 1998bw SN 2004lw ...
... resembling light curve of SN 1998bw Spectra taken close to maximum show extremely broad features as in SN 1998bw SN 2004lw ...
Astronomy 114 - Department of Astronomy
... Interstellar gas and dust are common in the disk of the Galaxy Interstellar medium (ISM) Diffuse gas (atomic H and molecular hydrogen H2 ) Dust (formed in the envelopes of stars) ...
... Interstellar gas and dust are common in the disk of the Galaxy Interstellar medium (ISM) Diffuse gas (atomic H and molecular hydrogen H2 ) Dust (formed in the envelopes of stars) ...
Chromospherically young, kinematically old stars
... to the local standard of rest, due to subsequent encounters with giant molecular clouds. In U and W , there will be a symmetric increase in the velocity dispersion and we would not expect the CYKOS to be much different from the normal stars, from the consideration of these velocity components only. ...
... to the local standard of rest, due to subsequent encounters with giant molecular clouds. In U and W , there will be a symmetric increase in the velocity dispersion and we would not expect the CYKOS to be much different from the normal stars, from the consideration of these velocity components only. ...
WAS THE SUN BORN IN A MASSIVE CLUSTER?
... A number of authors have argued that the Sun must have been born in a cluster of no more than several thousand stars, on the basis that, in a larger cluster, close encounters between the Sun and other stars would have truncated the outer solar system or excited the outer planets into eccentric orbit ...
... A number of authors have argued that the Sun must have been born in a cluster of no more than several thousand stars, on the basis that, in a larger cluster, close encounters between the Sun and other stars would have truncated the outer solar system or excited the outer planets into eccentric orbit ...
here - NASA/IPAC Extragalactic Database
... the situation may be a little more complicated than that. These stars will have such high mass-loss rates that it is possible, even likely, that the 120M⊙ star will not be identified as an O3-4 V or B0 I, but rather as a hydrogen-rich, WN Wolf-Rayet star, similar to the highest mass (but unevolved) ...
... the situation may be a little more complicated than that. These stars will have such high mass-loss rates that it is possible, even likely, that the 120M⊙ star will not be identified as an O3-4 V or B0 I, but rather as a hydrogen-rich, WN Wolf-Rayet star, similar to the highest mass (but unevolved) ...
ATLAS lifts the Cup: discovery of a new Milky Way satellite in Crater⋆†
... Object catalogues were generated from the processed images to refine the world coordinate system transformation. Each set of three individual dithered exposures per band were then stacked with bad pixel and cosmic ray rejection and further catalogues from the combined images generated. These catalog ...
... Object catalogues were generated from the processed images to refine the world coordinate system transformation. Each set of three individual dithered exposures per band were then stacked with bad pixel and cosmic ray rejection and further catalogues from the combined images generated. These catalog ...
Chapter 24
... like misshapen spirals. Irregular galaxies tend to be smaller than spirals, but somewhat larger than dwarf ellipticals. They typically contain between 108 and 1010 stars. The smallest such galaxies are called dwarf irregulars. As with elliptical galaxies, the dwarf type is the most common irregular. ...
... like misshapen spirals. Irregular galaxies tend to be smaller than spirals, but somewhat larger than dwarf ellipticals. They typically contain between 108 and 1010 stars. The smallest such galaxies are called dwarf irregulars. As with elliptical galaxies, the dwarf type is the most common irregular. ...
Cataclysmic Cosmic Events and How to Observe Them www.springer.com/series/5338
... In the Victorian era – or for non-British readers, the mid-to-late nineteenth century – amateur astronomy tended to center on Solar System objects. The Moon and planets, as well as bright comets, were the key objects of interest. The brighter variable stars were monitored, but photography was in it ...
... In the Victorian era – or for non-British readers, the mid-to-late nineteenth century – amateur astronomy tended to center on Solar System objects. The Moon and planets, as well as bright comets, were the key objects of interest. The brighter variable stars were monitored, but photography was in it ...
A catalogue of the Chandra Deep Field South with multi
... 3.1. Image reduction and object search All procedures used for the data reduction are based on the MIDAS package. A WFI image processing pipeline was developed by Wolf et al. (2001) and makes intensive use of programmes developed by K. Meisenheimer, H.-J. Röser and H. Hippelein for the Calar Alto D ...
... 3.1. Image reduction and object search All procedures used for the data reduction are based on the MIDAS package. A WFI image processing pipeline was developed by Wolf et al. (2001) and makes intensive use of programmes developed by K. Meisenheimer, H.-J. Röser and H. Hippelein for the Calar Alto D ...
Local Group Encyclopedia of Astronomy & Astrophysics eaa.iop.org Mario L Mateo
... sky and by the clouds of gas and dust within the plane of our Galaxy. This INTERSTELLAR MATTER effectively blocks all optical light from distant objects, making it impossible to find galaxies lurking in the background. Ongoing and planned surveys in the infrared and radio wavelengths can penetrate t ...
... sky and by the clouds of gas and dust within the plane of our Galaxy. This INTERSTELLAR MATTER effectively blocks all optical light from distant objects, making it impossible to find galaxies lurking in the background. Ongoing and planned surveys in the infrared and radio wavelengths can penetrate t ...
Age-Dating of Young Stars and Stellar Systems
... (< 912 Å) and a theoretical calibration of the age vs. UV luminosity are required. The age vs. optical-luminosity relation is highly degenerate due to the low sensitivity of the Rayleigh-Jeans part of the spectrum observed in hot stars (Massey et al. 1995). As a result, optical colors of young hot ...
... (< 912 Å) and a theoretical calibration of the age vs. UV luminosity are required. The age vs. optical-luminosity relation is highly degenerate due to the low sensitivity of the Rayleigh-Jeans part of the spectrum observed in hot stars (Massey et al. 1995). As a result, optical colors of young hot ...
THE MORPHOLOGICAL DEMOGRAPHICS OF GALAXIES IN THE
... types provided by BPZ are a linear combination from a template library of SEDs. We use the CWWSB_Benitez2003 template set as described in Benítez et al. (2004). These are based on the templates from Coleman, Wu, & Weedman (1980) and Kinney et al. (1996) consisting of El, Sbc, Scd, Im, SB3, and SB2, ...
... types provided by BPZ are a linear combination from a template library of SEDs. We use the CWWSB_Benitez2003 template set as described in Benítez et al. (2004). These are based on the templates from Coleman, Wu, & Weedman (1980) and Kinney et al. (1996) consisting of El, Sbc, Scd, Im, SB3, and SB2, ...
a changing cosmos - Whittier Union High School District
... of gravitational energy. A blast wave ejects the star's outer layers into space. The Crab nebula supernova remnant is incredibly bright, even though it looks quite dim at our distance from it—6,300 light-years. If we were to observe it from much closer, we would find that it puts out 1000 times as m ...
... of gravitational energy. A blast wave ejects the star's outer layers into space. The Crab nebula supernova remnant is incredibly bright, even though it looks quite dim at our distance from it—6,300 light-years. If we were to observe it from much closer, we would find that it puts out 1000 times as m ...
Carbon, nitrogen, oxygen and lithium abundances of six
... Abstract. Carbon, nitrogen and oxygen abundances were derived from high-resolution spectra of 6 cool supergiants of the Small Magellanic Cloud. Oxygen-to-iron ratios (mean value [O/Fe] ≈–0.18 dex) are found to be similar to those found in young objects in the LMC and the Galaxy. This result is discu ...
... Abstract. Carbon, nitrogen and oxygen abundances were derived from high-resolution spectra of 6 cool supergiants of the Small Magellanic Cloud. Oxygen-to-iron ratios (mean value [O/Fe] ≈–0.18 dex) are found to be similar to those found in young objects in the LMC and the Galaxy. This result is discu ...
Distance determination for RAVE stars using stellar models
... data release of June 2007, ∼ 200 000 observations have been made, from which 50 994 spectra have been reduced, resulting in 21 032 observations having astrophysical parameters. This new dataset will be interesting for Galaxy structure studies. However, there is a crucial piece of information missing ...
... data release of June 2007, ∼ 200 000 observations have been made, from which 50 994 spectra have been reduced, resulting in 21 032 observations having astrophysical parameters. This new dataset will be interesting for Galaxy structure studies. However, there is a crucial piece of information missing ...
Neutron star masses: dwarfs, giants and neighbors
... with short rotational periods indicates that the fraction of binaries among them substantially exceeds the observational estimates. To bring this fraction into agreement with the statistics for magnetars, the additional velocity acquired by a magnetar during its formation must be primarily perpendic ...
... with short rotational periods indicates that the fraction of binaries among them substantially exceeds the observational estimates. To bring this fraction into agreement with the statistics for magnetars, the additional velocity acquired by a magnetar during its formation must be primarily perpendic ...
Stars & Galaxies - newmanlib.ibri.org
... Different Kinds of Stars • Even a brief glance at the stars shows us that they differ in brightness. • As one looks at the stars more carefully, it becomes apparent that they are not all the same color. • Look at the constellation of Orion shown in the next panel. ...
... Different Kinds of Stars • Even a brief glance at the stars shows us that they differ in brightness. • As one looks at the stars more carefully, it becomes apparent that they are not all the same color. • Look at the constellation of Orion shown in the next panel. ...
Test 4 Review Clicker Questions
... a) NASA’s latest X-ray orbiting telescope. b) a millisecond pulsar with three planets. c) the strongest X-ray eclipsing binary system. d) a likely black hole binary star system. e) the first gamma-ray burster spotted in X rays. ...
... a) NASA’s latest X-ray orbiting telescope. b) a millisecond pulsar with three planets. c) the strongest X-ray eclipsing binary system. d) a likely black hole binary star system. e) the first gamma-ray burster spotted in X rays. ...
Edwin Hubble (1889
... weather permitted and in the last five months have netted nine novae and two variables." ...
... weather permitted and in the last five months have netted nine novae and two variables." ...
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.