An extended X-ray object ejected from the PSR B1259
... the decretion disk and dense wind of its companion star. During the pulsar eclipse, peaks of nonpulsed radio emission were observed, centered at ≈ 5 days before periastron and ≈ 20 days after periastron, with the relative strengths of the peaks varying from cycle to cycle. Ball et al. (1999) interpr ...
... the decretion disk and dense wind of its companion star. During the pulsar eclipse, peaks of nonpulsed radio emission were observed, centered at ≈ 5 days before periastron and ≈ 20 days after periastron, with the relative strengths of the peaks varying from cycle to cycle. Ball et al. (1999) interpr ...
Multiplicity in Early Stellar Evolution
... Bonnell et al., 2008; Bate, 2009a,b; Attwood et al., 2009). 3D HD SPH calculations by Bate (2009a) made predictions of the frequency of single, binary, triple and quadruple star systems formed during the collapse of a highly unstable cloud with an initial mass of 500 M⊙ , a Jeans mass of 1 M⊙ , and ...
... Bonnell et al., 2008; Bate, 2009a,b; Attwood et al., 2009). 3D HD SPH calculations by Bate (2009a) made predictions of the frequency of single, binary, triple and quadruple star systems formed during the collapse of a highly unstable cloud with an initial mass of 500 M⊙ , a Jeans mass of 1 M⊙ , and ...
ppd_hia
... • Observables: size, mass, density, temperature, ionization, composition, gas chemistry, dust mineralogy, structure (flaring, warps, gaps), ... ...
... • Observables: size, mass, density, temperature, ionization, composition, gas chemistry, dust mineralogy, structure (flaring, warps, gaps), ... ...
–1– 1. Introduction for AY 219 The periodic table of the elements
... X-ray photons from very hot gas (thermal source) such as might be found in a cluster of galaxies, as well as from various non-thermal sources such as SN, accreting black holes in the nuclei of galaxies, various types of energetic binaies, etc. Discrete line transitions are of very high energy and re ...
... X-ray photons from very hot gas (thermal source) such as might be found in a cluster of galaxies, as well as from various non-thermal sources such as SN, accreting black holes in the nuclei of galaxies, various types of energetic binaies, etc. Discrete line transitions are of very high energy and re ...
a fresh catch of massive binaries in the cygnus ob2 association
... MT070 is noteworthy as the longest period system yet measured in Cyg OB2, with P = 6.2 yr. The other four systems have periods ranging between 4 and 73 days. MT174 is noteworthy for having a probable mass ratio q < 0.1, making it a candidate progenitor to a low-mass X-ray binary. These measurements ...
... MT070 is noteworthy as the longest period system yet measured in Cyg OB2, with P = 6.2 yr. The other four systems have periods ranging between 4 and 73 days. MT174 is noteworthy for having a probable mass ratio q < 0.1, making it a candidate progenitor to a low-mass X-ray binary. These measurements ...
Constellation
... Piazzi tried to predict Ceres’ orbit. This was needed so other astronomers could find it. He observed Ceres for six weeks. He didn’t have enough information to determine Ceres’ orbit. After that, others searched for Ceres in vain. Several astronomers tried to work out Ceres’ orbit from his data. The ...
... Piazzi tried to predict Ceres’ orbit. This was needed so other astronomers could find it. He observed Ceres for six weeks. He didn’t have enough information to determine Ceres’ orbit. After that, others searched for Ceres in vain. Several astronomers tried to work out Ceres’ orbit from his data. The ...
offprint
... of He 6678 assuming nrp, while an (ad-hoc) model based on variable local linewidth (e.g. by non-uniform micro-turbulence across the stellar surface) could reproduce the He 6678 at least in principle. But Maintz et al. (2000), exploring a larger parameter space than considered by Balona et al. (1 ...
... of He 6678 assuming nrp, while an (ad-hoc) model based on variable local linewidth (e.g. by non-uniform micro-turbulence across the stellar surface) could reproduce the He 6678 at least in principle. But Maintz et al. (2000), exploring a larger parameter space than considered by Balona et al. (1 ...
Question: What is PRISM? PRISM is a space mission concept
... selected, PRISM will revolutionize our knowledge in several areas of astrophysics and cosmology. For instance, PRISM will bring us a complete census of matter, hot gas, and dust in the ent ...
... selected, PRISM will revolutionize our knowledge in several areas of astrophysics and cosmology. For instance, PRISM will bring us a complete census of matter, hot gas, and dust in the ent ...
Jets and Outflows From Star to Cloud: Observations Confront Theory
... also affect disk evolution and planet formation through disk irradiation or shielding, and enhanced radial mixing of both gas and solids. In this chapter we address this central question of outflow feedback on star and planet formation while also reviewing the current state of jet/outflow science. F ...
... also affect disk evolution and planet formation through disk irradiation or shielding, and enhanced radial mixing of both gas and solids. In this chapter we address this central question of outflow feedback on star and planet formation while also reviewing the current state of jet/outflow science. F ...
Research paper
... Youngblood et al. 2016). Over a dozen shocks protrude into the Orion Nebula as Herbig-Haro (HH) objects (Axon & Taylor 1984; O’Dell et al. 1997a,b; Doi et al. 2002; Kaifu et al. 2000; Doi et al. 2004; Graham et al. 2003; Reipurth & Bally 2001) demonstrating that the outflow is located within ∼0.1 pc ...
... Youngblood et al. 2016). Over a dozen shocks protrude into the Orion Nebula as Herbig-Haro (HH) objects (Axon & Taylor 1984; O’Dell et al. 1997a,b; Doi et al. 2002; Kaifu et al. 2000; Doi et al. 2004; Graham et al. 2003; Reipurth & Bally 2001) demonstrating that the outflow is located within ∼0.1 pc ...
WHAT MAKES A STAR SO SPECIAL Abstract
... Stars have a wide range of observable parameters. These parameters characterize them as space objects. There are two fundamental dependences between their parameters that connect the luminosity of the star with its temperature and mass. In this workshop we will learn more about how stars are grouped ...
... Stars have a wide range of observable parameters. These parameters characterize them as space objects. There are two fundamental dependences between their parameters that connect the luminosity of the star with its temperature and mass. In this workshop we will learn more about how stars are grouped ...
Deep $ I $-band imaging of $ z=\ mathsf {5.99} $ quasar
... & Krawczynski 2002). The highest redshift quasars are among the earliest objects in the Universe. The X-ray emission produced close to the central black hole is related intimately to the processes in the central engine and therefore offers the possibility to probe directly the processes occurring in ...
... & Krawczynski 2002). The highest redshift quasars are among the earliest objects in the Universe. The X-ray emission produced close to the central black hole is related intimately to the processes in the central engine and therefore offers the possibility to probe directly the processes occurring in ...
Interpolation of Magnitude.
... information package are some actual charts and projects you can do starting tonight! ...
... information package are some actual charts and projects you can do starting tonight! ...
CARBON ISOTOPE RATIO IN 12CO/13CO TOWARD LOCAL
... Mon R2 IRS 3. The vibrational transition bands of 12CO ¼ 2 high-resolution near-infrared spectroscopy (R ¼ 23; 000) to measure the 12CO/13CO ratio. The isotopic ratios are 12CO/13CO ¼ 137 9 (LkH 101), 86 49 (AFGL 490), and 158 (Mon R2 IRS 3), which are 1.5–2.8 times higher than the local inte ...
... Mon R2 IRS 3. The vibrational transition bands of 12CO ¼ 2 high-resolution near-infrared spectroscopy (R ¼ 23; 000) to measure the 12CO/13CO ratio. The isotopic ratios are 12CO/13CO ¼ 137 9 (LkH 101), 86 49 (AFGL 490), and 158 (Mon R2 IRS 3), which are 1.5–2.8 times higher than the local inte ...
SXDS Highlights : Subaru / FOCAS Spectroscopy
... Natural guide star AO system on Subaru telescope with IRCS. 154 hours of observation in total. 13 FoVs with 36 LBGs , 1 RadioG., and 7 DRGs are observed. Typical on-source effective integration is 5 hours. Typical PSF size at the target position is FWHM=0.2” (~1.5kpc@z=3) ...
... Natural guide star AO system on Subaru telescope with IRCS. 154 hours of observation in total. 13 FoVs with 36 LBGs , 1 RadioG., and 7 DRGs are observed. Typical on-source effective integration is 5 hours. Typical PSF size at the target position is FWHM=0.2” (~1.5kpc@z=3) ...
Jason T. Wright Roger Griffith, Steinn Sigurðsson Matthew Povich
... If a civilization uses energy, that energy must emerge as waste heat in the mid-infrared A civilization using most of its star’s energy would have little optical luminosity but be a very bright infrared source. This approach is totally general: any energy use by a civilization would give a star a mi ...
... If a civilization uses energy, that energy must emerge as waste heat in the mid-infrared A civilization using most of its star’s energy would have little optical luminosity but be a very bright infrared source. This approach is totally general: any energy use by a civilization would give a star a mi ...
Early Star-Forming Galaxies and the Reionisation of the Universe
... Despite these challenges, intrepid ...
... Despite these challenges, intrepid ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.