The XMM-Newton Bright Serendipitous Survey
... DSS I/II1 and the SDSS2 ). In particular, we have found the optical counterpart of about 88% of the XBS sources on the DSS with a red magnitude (the APM3 red magnitude) brighter than ∼20.5. All but 6 of the remaining sources have been optically identified either through dedicated photometry or using ...
... DSS I/II1 and the SDSS2 ). In particular, we have found the optical counterpart of about 88% of the XBS sources on the DSS with a red magnitude (the APM3 red magnitude) brighter than ∼20.5. All but 6 of the remaining sources have been optically identified either through dedicated photometry or using ...
the fixed stars
... Influence of the constellation: "It gives authority and a sober mind, sometimes making its natives judges or arbitrators, but exposes to cruel and severe trials. By the Kabalists this constellation is associated with the Hebrew letter Shin and the 22nd Tarot Trump, The Fool". (Robson). Rising: Cephe ...
... Influence of the constellation: "It gives authority and a sober mind, sometimes making its natives judges or arbitrators, but exposes to cruel and severe trials. By the Kabalists this constellation is associated with the Hebrew letter Shin and the 22nd Tarot Trump, The Fool". (Robson). Rising: Cephe ...
Unfolding the Milky Way bulge - International Max Planck Research
... 5.5 (J − K s ) and (J − H) color difference between our control field and those measured in the subfields of tiles b317, b303 and b275. The size of the subfields corresponds to the same resolution described in Fig. 2. The blue dashed line shows the relation E(J − H) = 0.638E(J − K s ) corresponding ...
... 5.5 (J − K s ) and (J − H) color difference between our control field and those measured in the subfields of tiles b317, b303 and b275. The size of the subfields corresponds to the same resolution described in Fig. 2. The blue dashed line shows the relation E(J − H) = 0.638E(J − K s ) corresponding ...
The Lupus clouds - European Southern Observatory
... evolution and perhaps the origin of the complex. The entire variety of objects related to the various stages of early stellar evolution are represented in Lupus, including some of the best studied T Tauri stars like RU Lup. The determination of many properties of the clouds, as well as their associa ...
... evolution and perhaps the origin of the complex. The entire variety of objects related to the various stages of early stellar evolution are represented in Lupus, including some of the best studied T Tauri stars like RU Lup. The determination of many properties of the clouds, as well as their associa ...
my dissertation (PhD. Thesis) - Argelander
... Galaxies are among the premier building blocks of the structure of matter distribution in the universe. Moreover they are the sites of the formation of stars such as our Sun. Therefore knowledge about their morphology and evolutionary history is of utmost importance for the understanding of the stru ...
... Galaxies are among the premier building blocks of the structure of matter distribution in the universe. Moreover they are the sites of the formation of stars such as our Sun. Therefore knowledge about their morphology and evolutionary history is of utmost importance for the understanding of the stru ...
Galaxy Assembly through Mergers
... to make me smile and a word to comfort me. Thank you for being my safe haven. My friends have been the backbone of my life, especially in the last few years. Ana and Pedro, my partners in crime, thank you for bearing with me in the most turbulent of times, never leaving my side. I thank you for the ...
... to make me smile and a word to comfort me. Thank you for being my safe haven. My friends have been the backbone of my life, especially in the last few years. Ana and Pedro, my partners in crime, thank you for bearing with me in the most turbulent of times, never leaving my side. I thank you for the ...
constellations - Richmond and Glen Allen Weather
... even the bright sun is dimmed toward one’s horizon at setting or rising. The apparent magnitude difference from the zenith to the horizon is approximately two magnitudes dimmer in brightness. 2. The least desirable time to observe the constellations is when the moon, brighter than a quarter phase, i ...
... even the bright sun is dimmed toward one’s horizon at setting or rising. The apparent magnitude difference from the zenith to the horizon is approximately two magnitudes dimmer in brightness. 2. The least desirable time to observe the constellations is when the moon, brighter than a quarter phase, i ...
Document
... • Evolution of our knowledge of this prototypical YSO was presented dating to the very early days of modern astronomy • T Tau and its surrounding nebulosities varied in optical light prior to the early ~1930’s, but this ceased abruptly • T Tau is a YSO triple system, with two of the system component ...
... • Evolution of our knowledge of this prototypical YSO was presented dating to the very early days of modern astronomy • T Tau and its surrounding nebulosities varied in optical light prior to the early ~1930’s, but this ceased abruptly • T Tau is a YSO triple system, with two of the system component ...
Revising the census of low luminosity AGN
... WHY AN AGN CENSUS? • A PROPER AGN CENSUS IS NEEDED FOR A VARIETY OF STUDIES, SUCH AS, E.G. , THE AGN/HOST GALAXY CONNECTION, THE PROPERTIES OF THE CENTRAL ENGINE, THE AGN LUMINOSITY FUNCTION … • THE CENSUS SHOULD BE COMPLETE (OR AT LEAST WITH WELL DEFINED BIASES) AND INCLUDE THE LEAST NUMBER OF INT ...
... WHY AN AGN CENSUS? • A PROPER AGN CENSUS IS NEEDED FOR A VARIETY OF STUDIES, SUCH AS, E.G. , THE AGN/HOST GALAXY CONNECTION, THE PROPERTIES OF THE CENTRAL ENGINE, THE AGN LUMINOSITY FUNCTION … • THE CENSUS SHOULD BE COMPLETE (OR AT LEAST WITH WELL DEFINED BIASES) AND INCLUDE THE LEAST NUMBER OF INT ...
Infrared Astronomy
... USA (Hinson 2009, http://www.nbca.org/Wildlife/New_Pictures.htm) Humans at normal body temperature, radiate most strongly in the infrared, which is definitely not seen by human eyes. The scientific discovery that the heat we all feel coming from the Sun is largely a radiation beyond the visible red ...
... USA (Hinson 2009, http://www.nbca.org/Wildlife/New_Pictures.htm) Humans at normal body temperature, radiate most strongly in the infrared, which is definitely not seen by human eyes. The scientific discovery that the heat we all feel coming from the Sun is largely a radiation beyond the visible red ...
The VIMOS Ultra-Deep Survey (VUDS): Fast Increase in the Fraction
... determination relies on the strong assumption that the contamination by low–z interlopers and incompleteness are fully understood and well controlled. The numerator of the fraction is the number of the LBGs that are observed with spectroscopy, and for which a strong Lyα rest–frame Equivalent Width ( ...
... determination relies on the strong assumption that the contamination by low–z interlopers and incompleteness are fully understood and well controlled. The numerator of the fraction is the number of the LBGs that are observed with spectroscopy, and for which a strong Lyα rest–frame Equivalent Width ( ...
X-Ray Spectroscopy of Stars
... X-rays have also been detected from brown dwarfs; again, the emission mechanism is supposedly coronal. Similarly, in low-mass pre-main sequence stars, i.e., T Tauri stars or (low-mass) protostars, intense steady and flaring X-ray radiation is also thought to originate predominantly in hot coronal pl ...
... X-rays have also been detected from brown dwarfs; again, the emission mechanism is supposedly coronal. Similarly, in low-mass pre-main sequence stars, i.e., T Tauri stars or (low-mass) protostars, intense steady and flaring X-ray radiation is also thought to originate predominantly in hot coronal pl ...
Hubble 2006: Science Year in Review
... giving it a classic case of “spherical aberration.” The mirror was perfectly smooth, but would not focus light to a single point. Hubble was designed to be visited by astronauts. Even before launch, NASA had begun to build a second-generation camera to replace the main camera that was launched with ...
... giving it a classic case of “spherical aberration.” The mirror was perfectly smooth, but would not focus light to a single point. Hubble was designed to be visited by astronauts. Even before launch, NASA had begun to build a second-generation camera to replace the main camera that was launched with ...
Here - NASA/IPAC Extragalactic Database
... Planetary nebulae (PNe) are evolutionary products of so-called intermediate mass stars (initial masses of 1 – 8 M ) as they progress from the asymptotic giant branch (AGB) to the white dwarf stage. It is the interaction of the slow AGB wind with the fast post-AGB wind which produces the nebula. Bec ...
... Planetary nebulae (PNe) are evolutionary products of so-called intermediate mass stars (initial masses of 1 – 8 M ) as they progress from the asymptotic giant branch (AGB) to the white dwarf stage. It is the interaction of the slow AGB wind with the fast post-AGB wind which produces the nebula. Bec ...
Understanding Variable Stars - Central Florida Astronomical Society
... 6.34 Variable red giants in the Large Magellanic Cloud, plotted in an apparent K magnitude versus log(period) graph 209 6.35 The 1978--2004 light curve of Mira, based on visual measurements from the AAVSO International Database 210 6.36 The spectra of four pulsating red giants 213 6.37 Radius versus ...
... 6.34 Variable red giants in the Large Magellanic Cloud, plotted in an apparent K magnitude versus log(period) graph 209 6.35 The 1978--2004 light curve of Mira, based on visual measurements from the AAVSO International Database 210 6.36 The spectra of four pulsating red giants 213 6.37 Radius versus ...
A spectroscopic study of detached binary systems using precise radial velocities
... system has been studied using two or more complementary observing techniques. Two of the suitable techniques are astrometry and spectroscopy. In favourable circumstances, astrometry can deduce the angular dimensions of the orbit, the total mass of the system, and sometimes, its distance from us. Spe ...
... system has been studied using two or more complementary observing techniques. Two of the suitable techniques are astrometry and spectroscopy. In favourable circumstances, astrometry can deduce the angular dimensions of the orbit, the total mass of the system, and sometimes, its distance from us. Spe ...
148 Jun - British Astronomical Association
... system with the stars separated though still quite close. It appears that the orbit of the eclipsing stars is ellipitical as the secondary minimum does not occur at 0.5 of the system’s phase. RX Herculis is roughly midway between Rasalhague and Altair. AK Herculis Although this system is not on our ...
... system with the stars separated though still quite close. It appears that the orbit of the eclipsing stars is ellipitical as the secondary minimum does not occur at 0.5 of the system’s phase. RX Herculis is roughly midway between Rasalhague and Altair. AK Herculis Although this system is not on our ...
W.M. Keck Observatory Annual Report 2009
... Butler of the Carnegie Institution of Washington led an international team that found two new planetary systems by combining data gathered with the Keck I telescope and the Anglo-Australian telescope. These new systems orbit the bright stars 61 Virginis and HD 1461, with each hosting a super-Earth o ...
... Butler of the Carnegie Institution of Washington led an international team that found two new planetary systems by combining data gathered with the Keck I telescope and the Anglo-Australian telescope. These new systems orbit the bright stars 61 Virginis and HD 1461, with each hosting a super-Earth o ...
Book Describing Techniques to Detect Transiting ExoPlanets
... that a transiting exoplanet has been identified. Armed with this information the professionals are justified in requesting observing time on a large telescope to measure radial velocity on several dates, and thereby determine the mass of the secondary. If the mass is small it must be an exoplanet. A ...
... that a transiting exoplanet has been identified. Armed with this information the professionals are justified in requesting observing time on a large telescope to measure radial velocity on several dates, and thereby determine the mass of the secondary. If the mass is small it must be an exoplanet. A ...
Structure in the first quadrant of the Galaxy: an analysis of TMGS star
... detailed analyses of the content of the IRAS sky (Walker et al. 1989). These comprise 33 ‘normal’ stellar types; 42 types of AGB star, both oxygen- and carbon-rich; six types of object that are distinct from others only in their MIR high luminosity; and six types of exotica including H ii regions, p ...
... detailed analyses of the content of the IRAS sky (Walker et al. 1989). These comprise 33 ‘normal’ stellar types; 42 types of AGB star, both oxygen- and carbon-rich; six types of object that are distinct from others only in their MIR high luminosity; and six types of exotica including H ii regions, p ...
Tuomas Kangas
... sequence for WDs occupies lower luminosities, and luminous, extended giant stars form the giant branch to the upper right of the main sequence. Above the giant branch are the even more luminous supergiant stars. These different types of stars and their evolution are briefly described below. A star f ...
... sequence for WDs occupies lower luminosities, and luminous, extended giant stars form the giant branch to the upper right of the main sequence. Above the giant branch are the even more luminous supergiant stars. These different types of stars and their evolution are briefly described below. A star f ...
WFC3 Science White Paper - Space Telescope Science Institute
... A primary legacy of the Hubble Space Telescope (HST), both scientifically and in the public eye, will be the spectacular images it produces of the astronomical sky. Its cameras have been among the most productive instruments in the history of astronomy. As HST begins a second decade of operations, i ...
... A primary legacy of the Hubble Space Telescope (HST), both scientifically and in the public eye, will be the spectacular images it produces of the astronomical sky. Its cameras have been among the most productive instruments in the history of astronomy. As HST begins a second decade of operations, i ...
A Universal Stellar Initial Mass Function? A Critical Look Further
... Way! Elmegreen & Scalo (2006) provide a detailed exploration of the degeneracies involved in inferring a stellar population’s IMF from its measured PDMF and adopted SFH. It is somewhat disconcerting that the break from the Salpeter law identified in many IMF studies needs to be invoked near the plac ...
... Way! Elmegreen & Scalo (2006) provide a detailed exploration of the degeneracies involved in inferring a stellar population’s IMF from its measured PDMF and adopted SFH. It is somewhat disconcerting that the break from the Salpeter law identified in many IMF studies needs to be invoked near the plac ...
Mid-infrared Properties of Seyfert Galaxies: the IRAS 12um Sample
... Using the infrared to study this issue offers a number of advantages the more important of which is… SHAO - Oct 2010 ...
... Using the infrared to study this issue offers a number of advantages the more important of which is… SHAO - Oct 2010 ...
Type Ia Supernovae
... Ic have been attributed to these events. This thesis, however is dedicated to the second group of supernovae, the thermonuclear explosions of degenerate carbon and oxygen rich material and lacking hydrogen - called Type Ia supernovae (SNe Ia). White dwarf stars are formed at the end of a typical sta ...
... Ic have been attributed to these events. This thesis, however is dedicated to the second group of supernovae, the thermonuclear explosions of degenerate carbon and oxygen rich material and lacking hydrogen - called Type Ia supernovae (SNe Ia). White dwarf stars are formed at the end of a typical sta ...
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.