Biosignatures and Planetary Properties to be
... I. Basic Science Goals of TPF and the Broad Diversity of Terrestrial Planets Beyond the Earth yet within our Solar System, our search for life and evidence about the origin of life will likely be confined to Mars, Europa, and Titan, along with small bodies such as comets, asteroids, and meteorite ...
... I. Basic Science Goals of TPF and the Broad Diversity of Terrestrial Planets Beyond the Earth yet within our Solar System, our search for life and evidence about the origin of life will likely be confined to Mars, Europa, and Titan, along with small bodies such as comets, asteroids, and meteorite ...
A search for a new class of pulsating DA white dwarf stars in the DB
... Most importantly in the context of this discussion: gravitational settling stratifies the structure of white dwarf stars, and in the presence of such strong gravitational fields it does so quickly. In the absence of any mixing – particularly in the absence of convection – we would expect all white d ...
... Most importantly in the context of this discussion: gravitational settling stratifies the structure of white dwarf stars, and in the presence of such strong gravitational fields it does so quickly. In the absence of any mixing – particularly in the absence of convection – we would expect all white d ...
Nibiru Hijacked
... BCE) but it was not Cuneiform’s only form; Akkadian and Old Persian technically fall under that same category at 2500 BCE and 550 BCE respectively. Ancient Egyptian appears around 3100 BCE. Additionally, two other writing systems are worth mention in this general context: The Indus script of South A ...
... BCE) but it was not Cuneiform’s only form; Akkadian and Old Persian technically fall under that same category at 2500 BCE and 550 BCE respectively. Ancient Egyptian appears around 3100 BCE. Additionally, two other writing systems are worth mention in this general context: The Indus script of South A ...
A search for debris disks in the Herschel
... a population of far-infrared/sub-mm sources that are associated with stars or star-like objects on the SDSS main-sequence locus. We validate our approach by comparing the properties of the most likely candidate disks to those of the known population. Methods. We use a photometric selection technique ...
... a population of far-infrared/sub-mm sources that are associated with stars or star-like objects on the SDSS main-sequence locus. We validate our approach by comparing the properties of the most likely candidate disks to those of the known population. Methods. We use a photometric selection technique ...
Astronomy Astrophysics Circumstellar emission in Be/X-ray binaries of the Magellanic
... that the error in the theoretical values of (B−V) for every spectral type is negligible. Of course this is not strictly correct because we always have an observational error of about ± one subtype in the spectral type determination. Fortunately, as can be seen in Table 4, the spectral types are conc ...
... that the error in the theoretical values of (B−V) for every spectral type is negligible. Of course this is not strictly correct because we always have an observational error of about ± one subtype in the spectral type determination. Fortunately, as can be seen in Table 4, the spectral types are conc ...
Planet Saturn
... learn about the physical characteristics of saturn and its famous rings, what we know about saturn’s moons and saturn’s roots in greek mythology. SATURN - OVERVIEW | PLANETS - NASA SOLAR SYSTEM EXPLORATION Sun, 16 Apr 2017 10:41:00 GMT the second largest planet in our solar system, adorned with thou ...
... learn about the physical characteristics of saturn and its famous rings, what we know about saturn’s moons and saturn’s roots in greek mythology. SATURN - OVERVIEW | PLANETS - NASA SOLAR SYSTEM EXPLORATION Sun, 16 Apr 2017 10:41:00 GMT the second largest planet in our solar system, adorned with thou ...
Supernovae and Gamma-Ray Bursts (draft)
... rotation, metallicity and dynamical effects. Finally, some of the major topics of current interest are briefly discussed. ...
... rotation, metallicity and dynamical effects. Finally, some of the major topics of current interest are briefly discussed. ...
Early-type stars in the core of the young open cluster Westerlund 2
... is dominated by strong and broad H Balmer lines. Weak absorption lines of He λλ 4388, 4471, Mg λ 4481 and Si λ 4552 are also seen. The He λ 4471/Mg λ 4481 intensity ratio indicates a spectral type B8-A0. The appearance of some weak metallic lines favours an A0 classification, whilst ...
... is dominated by strong and broad H Balmer lines. Weak absorption lines of He λλ 4388, 4471, Mg λ 4481 and Si λ 4552 are also seen. The He λ 4471/Mg λ 4481 intensity ratio indicates a spectral type B8-A0. The appearance of some weak metallic lines favours an A0 classification, whilst ...
The Clouds
... young stellar objects are detected in near-infrared images. In addition, 73 small evaporating gaseous globules (EGGs) have been detected on the ...
... young stellar objects are detected in near-infrared images. In addition, 73 small evaporating gaseous globules (EGGs) have been detected on the ...
Distance determination for RAVE stars using stellar models
... The future prospects for distance determinations are very promising. In the next decade the Gaia satellite (Perryman et al. 2001) will observe up to 109 stars with exquisite astrometric precision. The mission is due to start in 2012, but a final data release will not arrive until near the end of the ...
... The future prospects for distance determinations are very promising. In the next decade the Gaia satellite (Perryman et al. 2001) will observe up to 109 stars with exquisite astrometric precision. The mission is due to start in 2012, but a final data release will not arrive until near the end of the ...
When Stars Attack! In Search of Killer Supernovae
... Modern view (X-rays): remains of a supernova explosion ...
... Modern view (X-rays): remains of a supernova explosion ...
Zapartas_deMink_Izzard_AA_2017
... delay time between formation of the progenitor star and its final explosion, extending the work of De Donder & Vanbeveren (2003b). We investigate how binary interaction a↵ects the delaytime distribution of ccSNe. A significant fraction of ccSNe are expected to be ‘late’, that is, they occur with del ...
... delay time between formation of the progenitor star and its final explosion, extending the work of De Donder & Vanbeveren (2003b). We investigate how binary interaction a↵ects the delaytime distribution of ccSNe. A significant fraction of ccSNe are expected to be ‘late’, that is, they occur with del ...
Notable long-period eclipsing binaries. Part I. - Project VS
... Mag.: 3.73 - 3.89 V; Period: 3784.3 d (10.36 yr); Next eclipse: March 2024 Another remarkable star with an extremely long period between eclipses. Sadly for those observers who look forward to capture the event soon, its eclipse has just ended. Another is expected in ten years – in 2024. Eclipse dur ...
... Mag.: 3.73 - 3.89 V; Period: 3784.3 d (10.36 yr); Next eclipse: March 2024 Another remarkable star with an extremely long period between eclipses. Sadly for those observers who look forward to capture the event soon, its eclipse has just ended. Another is expected in ten years – in 2024. Eclipse dur ...
Planet Hunters Education Guide
... such as Galaxy Zoo, Snapshot Serengeti or Seafloor Explorer, require volunteers to identify objects in images. Other projects, such as Whale FM or Bat Detective need people to identify sounds, while Old Weather and Ancient Lives utilize the human ability to identify words and letters and to decipher ...
... such as Galaxy Zoo, Snapshot Serengeti or Seafloor Explorer, require volunteers to identify objects in images. Other projects, such as Whale FM or Bat Detective need people to identify sounds, while Old Weather and Ancient Lives utilize the human ability to identify words and letters and to decipher ...
here
... illuminated, 30.26 a.u., Aquarius), and Pluto on May 16th (magnitude +14.2, 0.1", 100% illuminated, 32.72 a.u., Sagittarius). In the evening, Mars is in the northeast and Jupiter in the southeast. Jupiter is located in the southwest and Saturn in the southeast at midnight. Mercury and Venus can be ...
... illuminated, 30.26 a.u., Aquarius), and Pluto on May 16th (magnitude +14.2, 0.1", 100% illuminated, 32.72 a.u., Sagittarius). In the evening, Mars is in the northeast and Jupiter in the southeast. Jupiter is located in the southwest and Saturn in the southeast at midnight. Mercury and Venus can be ...
WAS THE SUN BORN IN A MASSIVE CLUSTER?
... mass, which we take to be 0.2 M# (Chabrier 2005) for our calculations, M4 = Mc /104 M# , and Σ−1 = Σc /0.1 g cm−2 . Equations (7) and (8) provide estimates of the number density and velocity dispersion that we can use in our estimates. The relationship between the cluster lifetime tlife and the cros ...
... mass, which we take to be 0.2 M# (Chabrier 2005) for our calculations, M4 = Mc /104 M# , and Σ−1 = Σc /0.1 g cm−2 . Equations (7) and (8) provide estimates of the number density and velocity dispersion that we can use in our estimates. The relationship between the cluster lifetime tlife and the cros ...
Comparison of Precession Theories: An
... become more of a “plug” whereby inputs are gradually added or modified to fit the observation rather than being predictive or resting on solid theory. Recently, an Italian scientist, Carlo Santagata2 completed a treatise examining Newton’s and D”Alembert’s work and subsequent equations. He finds num ...
... become more of a “plug” whereby inputs are gradually added or modified to fit the observation rather than being predictive or resting on solid theory. Recently, an Italian scientist, Carlo Santagata2 completed a treatise examining Newton’s and D”Alembert’s work and subsequent equations. He finds num ...
our knowledge of high-mass star formation at the dawn of - CEA-Irfu
... high-mass star formation have been called massive starless or pre-stellar cores, massive cold molecular cores, or even infrared-dark clouds. In the subsequent phase, they have been named massive protostars, high-mass protostellar objects, or hot molecular cores. The better-known final phase would co ...
... high-mass star formation have been called massive starless or pre-stellar cores, massive cold molecular cores, or even infrared-dark clouds. In the subsequent phase, they have been named massive protostars, high-mass protostellar objects, or hot molecular cores. The better-known final phase would co ...
preprint, pdf version - LESIA
... The TNOs of the ESO2p2/WFI program were selected according to their body size, which is usually related to their apparent sizes on the sky. Given the astrometric uncertainties in the star positions and the error in the TNO ephemeris, larger apparent diameters correspond to a higher probability of a ...
... The TNOs of the ESO2p2/WFI program were selected according to their body size, which is usually related to their apparent sizes on the sky. Given the astrometric uncertainties in the star positions and the error in the TNO ephemeris, larger apparent diameters correspond to a higher probability of a ...
POSTERS SESSION I: Atmospheres of Massive Stars
... We demonstrate that it is possible to have clumping occur close to the star while still achieving an excellent fit to Hα by consistently treating the wind’s rotation in the spectral modeling. An excellent agreement to other important optical lines such as HeII 4686 Å and NIII 4634–4640 Å is also o ...
... We demonstrate that it is possible to have clumping occur close to the star while still achieving an excellent fit to Hα by consistently treating the wind’s rotation in the spectral modeling. An excellent agreement to other important optical lines such as HeII 4686 Å and NIII 4634–4640 Å is also o ...
The HERMES GALAH survey: overview
... We know that the Galactic thin disk shows a mean radial abundance gradient of about 0.07 dex kpc 1 . Near the sun, the thin disk stars cover a wide range in age, with the oldest stars having ages up to about 10 Gyr. Their age-metallicity relation (Figure 1) shows that stars of almost all ages up to ...
... We know that the Galactic thin disk shows a mean radial abundance gradient of about 0.07 dex kpc 1 . Near the sun, the thin disk stars cover a wide range in age, with the oldest stars having ages up to about 10 Gyr. Their age-metallicity relation (Figure 1) shows that stars of almost all ages up to ...
Aquarius (constellation)
Aquarius is a constellation of the zodiac, situated between Capricornus and Pisces. Its name is Latin for ""water-carrier"" or ""cup-carrier"", and its symbol is 20px (Unicode ♒), a representation of water.Aquarius is one of the oldest of the recognized constellations along the zodiac (the sun's apparent path). It was one of the 48 constellations listed by the 2nd century AD astronomer Ptolemy, and it remains one of the 88 modern constellations. It is found in a region often called the Sea due to its profusion of constellations with watery associations such as Cetus the whale, Pisces the fish, and Eridanus the river.