The universe of the coming ALMA revolution
... Left: The Horsehead Nebula in Orion, a dusty star-forming cloud, as seen in visible and submillimeter light. The submillimeter image, captured with a large, single-dish telescope, shows regions of possible star formation activity that are obscured in visible wavelengths by dust. ALMA will see such h ...
... Left: The Horsehead Nebula in Orion, a dusty star-forming cloud, as seen in visible and submillimeter light. The submillimeter image, captured with a large, single-dish telescope, shows regions of possible star formation activity that are obscured in visible wavelengths by dust. ALMA will see such h ...
Carbon, nitrogen and oxygen abundances in
... Lambert 2004; Lyubimkov et al. 2005, hereinafter Papers I, II, III and IV, respectively). In particular, in Paper III we determined from He I lines the helium abundance He/H and the projected rotational velocity v sin i for 102 B stars. The v sin i values were found to range from 5 to 280 km s−1 ; s ...
... Lambert 2004; Lyubimkov et al. 2005, hereinafter Papers I, II, III and IV, respectively). In particular, in Paper III we determined from He I lines the helium abundance He/H and the projected rotational velocity v sin i for 102 B stars. The v sin i values were found to range from 5 to 280 km s−1 ; s ...
Isaac NEWTON: Philosophiae Naturalis Principia Mathematica. 3 Ed
... 30 or 4 to 5. Again the comet of the year 1665 in the month of April, as Helvelius is the authority, by its clarity surpassed almost all the fixed stars, even Saturn, on account of the vividness of its colour for a long while. Certainly this comet was brighter than that other one, which had appeared ...
... 30 or 4 to 5. Again the comet of the year 1665 in the month of April, as Helvelius is the authority, by its clarity surpassed almost all the fixed stars, even Saturn, on account of the vividness of its colour for a long while. Certainly this comet was brighter than that other one, which had appeared ...
Galaxy Disks Further
... (1932), or the HI gas (van der Kruit 1981). Sanders & McGaugh (2002) have reviewed modified Newtonian dynamics as an alternative to dark matter. Within disks, the star-formation history was studied first in our Galaxy in the Solar Neighborhood. The stellar initial mass function (IMF; the statistical ...
... (1932), or the HI gas (van der Kruit 1981). Sanders & McGaugh (2002) have reviewed modified Newtonian dynamics as an alternative to dark matter. Within disks, the star-formation history was studied first in our Galaxy in the Solar Neighborhood. The stellar initial mass function (IMF; the statistical ...
An Atlas of Stellar Spectra
... luminosity classes. It is not possible even to adopt certain criteria as standard, since different criteria may have to be used with different dispersion. In the Atlas some of the most useful features for luminosity classification have been indicated, but it should be emphasized that each dispersion ...
... luminosity classes. It is not possible even to adopt certain criteria as standard, since different criteria may have to be used with different dispersion. In the Atlas some of the most useful features for luminosity classification have been indicated, but it should be emphasized that each dispersion ...
The Astrology of Space - Matrix Astrology Software
... ISBN 978-0-9794970-8-7 All rights reserved. No part of the publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior permission of the publisher. Graphics designed by Mich ...
... ISBN 978-0-9794970-8-7 All rights reserved. No part of the publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior permission of the publisher. Graphics designed by Mich ...
Rich
... combination of dust extinction, gas kinematics, and spatial geometry but the order of importance of each of these is unknown, and may vary from galaxy to galaxy. • Opportunity: Galex grism mode in Far-UV (FUV) used to discover the first known sample of low redshift LAE galaxies. Instead of studying ...
... combination of dust extinction, gas kinematics, and spatial geometry but the order of importance of each of these is unknown, and may vary from galaxy to galaxy. • Opportunity: Galex grism mode in Far-UV (FUV) used to discover the first known sample of low redshift LAE galaxies. Instead of studying ...
Astronomy Test Review
... ____ 65. Circumpolar stars in the Northern Hemisphere appear to circle a. the moon. c. Proxima Centauri. b. the sun. d. Polaris. ____ 66. What is apparent magnitude? a. the brightness of a star as it appears from Earth b. the true brightness of a star c. the brightness of the moon as it appears from ...
... ____ 65. Circumpolar stars in the Northern Hemisphere appear to circle a. the moon. c. Proxima Centauri. b. the sun. d. Polaris. ____ 66. What is apparent magnitude? a. the brightness of a star as it appears from Earth b. the true brightness of a star c. the brightness of the moon as it appears from ...
DIO vol. 15 - DIO, The International Journal of Scientific History
... I spent most of my career as an observational astronomer. Mostly, I used the 48-inch Schmidt telescope at Mt. Palomar to perform various surveys. My main job was to search for supernovae, but my real passion was to search for unusual objects in the Solar System – comets, Apollo asteroids, and whatev ...
... I spent most of my career as an observational astronomer. Mostly, I used the 48-inch Schmidt telescope at Mt. Palomar to perform various surveys. My main job was to search for supernovae, but my real passion was to search for unusual objects in the Solar System – comets, Apollo asteroids, and whatev ...
Debris Disks: Seeing Dust, Thinking of Planetesimals and Planets
... to dust. Evidence for this comes from observations of the thermal emission and stellar light scattered by that dust. A common umbrella term for all these “sub-planetary” solids is a “debris disk”. Debris disks are aftermath of planet formation in the past, and they formed in the same process as the ...
... to dust. Evidence for this comes from observations of the thermal emission and stellar light scattered by that dust. A common umbrella term for all these “sub-planetary” solids is a “debris disk”. Debris disks are aftermath of planet formation in the past, and they formed in the same process as the ...
DIO 15 - DIO, The International Journal of Scientific History
... I spent most of my career as an observational astronomer. Mostly, I used the 48-inch Schmidt telescope at Mt. Palomar to perform various surveys. My main job was to search for supernovae, but my real passion was to search for unusual objects in the Solar System – comets, Apollo asteroids, and whatev ...
... I spent most of my career as an observational astronomer. Mostly, I used the 48-inch Schmidt telescope at Mt. Palomar to perform various surveys. My main job was to search for supernovae, but my real passion was to search for unusual objects in the Solar System – comets, Apollo asteroids, and whatev ...
WFC3 Science White Paper - Space Telescope Science Institute
... Accordingly, a new high-performance, panchromatic camera, the Wide Field Camera 3 (hereafter WFC3), is being developed for installation on HST during Servicing Mission 4, planned for 2003. Three main drivers have inspired the current design of WFC3: (1) WFC3 must be able to offer excellent visible-b ...
... Accordingly, a new high-performance, panchromatic camera, the Wide Field Camera 3 (hereafter WFC3), is being developed for installation on HST during Servicing Mission 4, planned for 2003. Three main drivers have inspired the current design of WFC3: (1) WFC3 must be able to offer excellent visible-b ...
The masses and spins of neutron stars and stellar
... As the remnants of core-collapse supernovae, neutron stars and black holes are also windows into the collapse and explosion processes. The further evolution of these systems in accreting binaries can tell us about the accretion process, e.g., the total amount of mass that is typically deposited on t ...
... As the remnants of core-collapse supernovae, neutron stars and black holes are also windows into the collapse and explosion processes. The further evolution of these systems in accreting binaries can tell us about the accretion process, e.g., the total amount of mass that is typically deposited on t ...
Lichtenknecker- Database of the BAV
... The criteria for an inclusion of eclipsing binaries into the database are a magnitude not fainter than 13mag during maximum light and a declination north of –20 degree. There is no limit regarding the amplitude of the change of light or period. Due to the increasing use of CCD-cameras in the recent ...
... The criteria for an inclusion of eclipsing binaries into the database are a magnitude not fainter than 13mag during maximum light and a declination north of –20 degree. There is no limit regarding the amplitude of the change of light or period. Due to the increasing use of CCD-cameras in the recent ...
Science with the Constellation
... image taken by the ROSAT High Resolution Imager (million second exposure) shows the Lockman hole region. It is the deepest X-ray image of the sky achieved so far. (Hasinger et al., 1998) Optical identification programs for the ROSAT sources reveal that many are AGN at a mean redshift of 1.5, reachin ...
... image taken by the ROSAT High Resolution Imager (million second exposure) shows the Lockman hole region. It is the deepest X-ray image of the sky achieved so far. (Hasinger et al., 1998) Optical identification programs for the ROSAT sources reveal that many are AGN at a mean redshift of 1.5, reachin ...
Present-day cosmic abundances - Dr. Karl Remeis
... An ideal alternative to find a reference for the chemical composition of cosmic matter are normal unevolved early B-type stars of ∼8-18 M⊙ , which can provide simultaneously temporal (present-day) and local (birth place) information on chemical abundances. They can be observed not only in the solar ...
... An ideal alternative to find a reference for the chemical composition of cosmic matter are normal unevolved early B-type stars of ∼8-18 M⊙ , which can provide simultaneously temporal (present-day) and local (birth place) information on chemical abundances. They can be observed not only in the solar ...
Astronomy Astrophysics Gaia-ESO Survey: The analysis of high-resolution The
... 2006) photometry (point sources with quality flags “AAA”). A box is defined in a color-magnitude diagram with limits 12 < J < 14 and 0.23 < (J − K) < 0.45 + 0.5 × E(B − V). The Schlegel et al. (1998) maps are used to determine the extinction E(B − V). The targets selected before April 2012 had a bri ...
... 2006) photometry (point sources with quality flags “AAA”). A box is defined in a color-magnitude diagram with limits 12 < J < 14 and 0.23 < (J − K) < 0.45 + 0.5 × E(B − V). The Schlegel et al. (1998) maps are used to determine the extinction E(B − V). The targets selected before April 2012 had a bri ...
Observations and Theory of Dynamical Triggers for Star Formation
... M16 (Hester et al. 1996), and M8 (Caulet 1997). Other similar regions have been found in the Sco-Cen association (Bertoldi & Jenkins 1992). Some of these neutral regions may be protostellar disks, as argued in the papers on Orion, but Hester et al. (1996) claims that many are evaporating globules ra ...
... M16 (Hester et al. 1996), and M8 (Caulet 1997). Other similar regions have been found in the Sco-Cen association (Bertoldi & Jenkins 1992). Some of these neutral regions may be protostellar disks, as argued in the papers on Orion, but Hester et al. (1996) claims that many are evaporating globules ra ...
Luminosity profiles and sizes of massive star clusters in NGC 7252
... Cluster profiles and sizes in NGC 7252 Observations of young cluster systems have shown that the clusters themselves are often grouped into larger structures, cluster complexes, with radii of tens to hundreds of parsecs (e.g. Zhang, Fall & Whitmore 2001; Larsen 2004). These complexes often appear t ...
... Cluster profiles and sizes in NGC 7252 Observations of young cluster systems have shown that the clusters themselves are often grouped into larger structures, cluster complexes, with radii of tens to hundreds of parsecs (e.g. Zhang, Fall & Whitmore 2001; Larsen 2004). These complexes often appear t ...
The Project Gutenberg eBook #32000: An
... was written, the details of the attempt to accomplish them have undergone many, and in some cases important, modifications. For example, the work on reference points and lines has been deferred to Chapter iv. If one is to know the sky, and not simply know about it, a knowledge of the coördinate syst ...
... was written, the details of the attempt to accomplish them have undergone many, and in some cases important, modifications. For example, the work on reference points and lines has been deferred to Chapter iv. If one is to know the sky, and not simply know about it, a knowledge of the coördinate syst ...
The Evolution of Star Formation Activity in . Cory R. Wagner
... IRAC Shallow Cluster Survey, and 25 low-redshift (0.15 < z < 1) clusters from The Cluster Lensing And Supernova survey with Hubble. We compare cluster galaxy star formation to that of the field over 0.15 < z < 1.5 using ∼8000 galaxies from the UltraVISTA survey. Mid-infrared star formation rates are ...
... IRAC Shallow Cluster Survey, and 25 low-redshift (0.15 < z < 1) clusters from The Cluster Lensing And Supernova survey with Hubble. We compare cluster galaxy star formation to that of the field over 0.15 < z < 1.5 using ∼8000 galaxies from the UltraVISTA survey. Mid-infrared star formation rates are ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.