The Antares Emission Nebula and Mass Loss of α Sco A
... The Antares nebula has been known as a peculiar [Fe II] emission nebula, apparently without normal H II region lines. Long-slit VLT/UVES mapping shows that it is an H II region 3 in size around the B type star A Sco B, with a Balmer line recombination spectrum and [N II] lines, but no [O II] and [O ...
... The Antares nebula has been known as a peculiar [Fe II] emission nebula, apparently without normal H II region lines. Long-slit VLT/UVES mapping shows that it is an H II region 3 in size around the B type star A Sco B, with a Balmer line recombination spectrum and [N II] lines, but no [O II] and [O ...
M81/M82/NGC3077
... (CBR value: 48 km/sec) M82 — 202 km/sec (3.9 ± 0.3 Mpc) (CBR value: 296 km/sec) M81 is closer and approaching, while M82 is farther away and receding; ...
... (CBR value: 48 km/sec) M82 — 202 km/sec (3.9 ± 0.3 Mpc) (CBR value: 296 km/sec) M81 is closer and approaching, while M82 is farther away and receding; ...
High-Energy Astrophysics with Gamma
... the western nucleus. In November 2002, new observations with VLBI revealed 30 supernova remnants candidates, 20 in the western, and 10 in the eastern nucleus. ...
... the western nucleus. In November 2002, new observations with VLBI revealed 30 supernova remnants candidates, 20 in the western, and 10 in the eastern nucleus. ...
GMRT search for 150 MHz radio emission from the transiting
... We report a sensitive search for meter-wavelength emission at 150 MHz from two prominent transiting extrasolar planets, HD 189733 b and HD 209458 b. To distinguish any planetary emission from possible stellar or background contributions, we monitored these systems just prior to, during, and after th ...
... We report a sensitive search for meter-wavelength emission at 150 MHz from two prominent transiting extrasolar planets, HD 189733 b and HD 209458 b. To distinguish any planetary emission from possible stellar or background contributions, we monitored these systems just prior to, during, and after th ...
The Strikingly Uniform, Highly Turbulent Interstellar Medium of the
... a key stage of their evolution –when feedback from the AGN may have started quenching star formation–, just about to become regular quasars and decay into dead elliptical galaxies (Sanders et al. 1988). W2246-0526 is the most extreme of these remarkable systems known. At a redshift z = 4.601 ± 0.001 ...
... a key stage of their evolution –when feedback from the AGN may have started quenching star formation–, just about to become regular quasars and decay into dead elliptical galaxies (Sanders et al. 1988). W2246-0526 is the most extreme of these remarkable systems known. At a redshift z = 4.601 ± 0.001 ...
The local spiral structure of the Milky Way
... standard density-wave theory may not explain spiral structure in galaxies like the Milky Way (15). The four new parallax-measured sources at l < 70° do not follow the main arc of the Local Arm. Instead, these sources, as well as G059.78+00.06 and ON 1, branch off and curve inward in the Milky Way. A ...
... standard density-wave theory may not explain spiral structure in galaxies like the Milky Way (15). The four new parallax-measured sources at l < 70° do not follow the main arc of the Local Arm. Instead, these sources, as well as G059.78+00.06 and ON 1, branch off and curve inward in the Milky Way. A ...
Lecture 9: The interstellar medium (ISM)
... ASTR112 The Galaxy Lecture 9 • Wide distribution throughout galactic disk to R ~ 20 kpc • Greatest density of clouds for 4 kpc < R < 14 kpc • Number along a given lines of sight in glactic plane ...
... ASTR112 The Galaxy Lecture 9 • Wide distribution throughout galactic disk to R ~ 20 kpc • Greatest density of clouds for 4 kpc < R < 14 kpc • Number along a given lines of sight in glactic plane ...
Photonic Astronomy and Quantum Optics
... Almost all of astronomy depends on the interpretation of properties of electromagnetic radiation (“light”) from celestial sources. The sole exceptions are neutrino detections; gravitational-wave searches; analyses of cosmic rays, meteorites, and other extraterrestrial materials; and in-situ studies ...
... Almost all of astronomy depends on the interpretation of properties of electromagnetic radiation (“light”) from celestial sources. The sole exceptions are neutrino detections; gravitational-wave searches; analyses of cosmic rays, meteorites, and other extraterrestrial materials; and in-situ studies ...
Chapter 1 Introduction
... simple cloud material into a solar-type star, complete with a planetary system, moons, comets and possibly biology. While the conceptual outline of what is known as low-mass (≤ 1M" ) star formation is generally well understood, almost every detail about how the initial conditions, i.e. the chemo-phy ...
... simple cloud material into a solar-type star, complete with a planetary system, moons, comets and possibly biology. While the conceptual outline of what is known as low-mass (≤ 1M" ) star formation is generally well understood, almost every detail about how the initial conditions, i.e. the chemo-phy ...
a High-Mass Protostar with a Rotating Disk.
... secondary peak 600 to the northwest of the protostar (at Vlsr ∼ −59 km s−1 ), which is also evident in the continuum map. However, whether this is a separate protostellar condensation or due to interaction with the blue–shifted outflow is still unclear. All our observations show that this is an extr ...
... secondary peak 600 to the northwest of the protostar (at Vlsr ∼ −59 km s−1 ), which is also evident in the continuum map. However, whether this is a separate protostellar condensation or due to interaction with the blue–shifted outflow is still unclear. All our observations show that this is an extr ...
Starburst Galaxies Under the Microscope: High
... Since the supernova rate is dominated by stars with a mass of about 8 M (the most numerous stars still producing supernovae), which have a lifetime of about 3 10 7 years, the BrG and [Fe II] emission trace phases of the starbursts that are temporally separated by this amount of time. In principle, ...
... Since the supernova rate is dominated by stars with a mass of about 8 M (the most numerous stars still producing supernovae), which have a lifetime of about 3 10 7 years, the BrG and [Fe II] emission trace phases of the starbursts that are temporally separated by this amount of time. In principle, ...
Next Generation VLA Science White Paper
... ∼ 10–30 times fainter than CO, so that a similar quality map targeting these diagnostics would require an impossible 20,000–200,000 hours on the previous generation of forefront facilities. In very bright regions and through heroic efforts at lower resolution these diagnostics have been applied and ...
... ∼ 10–30 times fainter than CO, so that a similar quality map targeting these diagnostics would require an impossible 20,000–200,000 hours on the previous generation of forefront facilities. In very bright regions and through heroic efforts at lower resolution these diagnostics have been applied and ...
H2CO and CO in S140
... peak (Fig 1). Thus, we confirm that the strongest H2CO absorption does not occur near the Hα arc where the CO emission is brightest. How can we explain these differences? ...
... peak (Fig 1). Thus, we confirm that the strongest H2CO absorption does not occur near the Hα arc where the CO emission is brightest. How can we explain these differences? ...
Searching for Dwarf Galaxies and Population III Star
... sources is the chemically unevolved surroundings of a large galaxy or proto-cluster of galaxies at high redshift. The central sources are likely to have ionized a local “bubble” through which strong Lyman emission can escape from surrounding dwarf galaxies. Thus, near-infrared observations of thes ...
... sources is the chemically unevolved surroundings of a large galaxy or proto-cluster of galaxies at high redshift. The central sources are likely to have ionized a local “bubble” through which strong Lyman emission can escape from surrounding dwarf galaxies. Thus, near-infrared observations of thes ...
Abstracts
... We use stacking techniques in order to study the global HI properties of galaxies in the Lockman Hole area (~6 square degrees) observed with the Westerbork Synthesis Radio Telescope (WSRT). Redshifts and sky positions indispensable for stacking are provided by the SDSS database along with other gala ...
... We use stacking techniques in order to study the global HI properties of galaxies in the Lockman Hole area (~6 square degrees) observed with the Westerbork Synthesis Radio Telescope (WSRT). Redshifts and sky positions indispensable for stacking are provided by the SDSS database along with other gala ...
two dozen compact sources and a massive disk
... • We analyze its structure using tools developed for infrared clusters (Qparameter of MST) • Dust masses are consistent with disks around intermediate to high-mass protostars. The gas kinematics of the dominant member (SMA 1b) is consistent with a rotating, infalling disk of enclosed mass of 10-30 M ...
... • We analyze its structure using tools developed for infrared clusters (Qparameter of MST) • Dust masses are consistent with disks around intermediate to high-mass protostars. The gas kinematics of the dominant member (SMA 1b) is consistent with a rotating, infalling disk of enclosed mass of 10-30 M ...
Giant “Pulsar” Studies with the Compact Array Abstract
... Studying stars as a population of radio sources is hard. To begin with, the menagerie of stellar radio emitters is large and vociferous: objects from cool dwarfs to giants to pre-main sequence T Tauri stars to the hotter Ap and Bp stars, to Wolf-Rayet stars all exhibit fascinating radio properties ( ...
... Studying stars as a population of radio sources is hard. To begin with, the menagerie of stellar radio emitters is large and vociferous: objects from cool dwarfs to giants to pre-main sequence T Tauri stars to the hotter Ap and Bp stars, to Wolf-Rayet stars all exhibit fascinating radio properties ( ...
High-Mass Star Formation
... CAVEAT: may be contribution from compact components (UCHIIs or disks) within central beam W3(OH) UCHII may contribute as much as 25% of the central flux assuming optically thick free-free scaled from 3mm flux (Wilner, Welch, & Forster 1995) ...
... CAVEAT: may be contribution from compact components (UCHIIs or disks) within central beam W3(OH) UCHII may contribute as much as 25% of the central flux assuming optically thick free-free scaled from 3mm flux (Wilner, Welch, & Forster 1995) ...
Chapter 18 The Interstellar Medium - University of Texas Astronomy
... most of the UV radiation from the rest of the Galaxies. ...
... most of the UV radiation from the rest of the Galaxies. ...
The Milky Way
... Blue light is strongly scattered and absorbed by interstellar clouds. Red light can more easily penetrate the ...
... Blue light is strongly scattered and absorbed by interstellar clouds. Red light can more easily penetrate the ...
Radio Emission Toward Regions of Massive Star Formation
... for water and methanol maser emission and radio continuum emission. A total of 42 radio detections were made including 27 new radio sources, four water masers, and eight compact H II regions. The lobes of a radio galaxy were resolved for the first time, and the host galaxy identified. Seven sources ...
... for water and methanol maser emission and radio continuum emission. A total of 42 radio detections were made including 27 new radio sources, four water masers, and eight compact H II regions. The lobes of a radio galaxy were resolved for the first time, and the host galaxy identified. Seven sources ...
Deep Chandra Observations of the Arches and Quintuplet Clusters at... Hui Dong Q. Daniel Wang ( &
... The diffuse emission has a spectrum that is substantially harder than that of the point-like sources. In the core region (e.g. ≤ 15”, for Arches). The potential contamination of faint undetected point-like sources could be upto ∼ 65%, but mostly at energies ≤ 4 keV. The remaining diffuse emission ca ...
... The diffuse emission has a spectrum that is substantially harder than that of the point-like sources. In the core region (e.g. ≤ 15”, for Arches). The potential contamination of faint undetected point-like sources could be upto ∼ 65%, but mostly at energies ≤ 4 keV. The remaining diffuse emission ca ...
So, what`s the problem for high
... Why don’t we see a cluster of sources? Clump mass function looks like the Initial Mass Function--Maybe we see only the single brightest star. Fig. 2. The mass spectrum of IRAS 19410+2336. The clumpmass bins are [1.7(3),4], [4,6], [6,8], [8,10], and [10,25] M, and the axes are in logarithmic units. ...
... Why don’t we see a cluster of sources? Clump mass function looks like the Initial Mass Function--Maybe we see only the single brightest star. Fig. 2. The mass spectrum of IRAS 19410+2336. The clumpmass bins are [1.7(3),4], [4,6], [6,8], [8,10], and [10,25] M, and the axes are in logarithmic units. ...
ALMA_BoJun605_Gruppioni
... K km s-1pc2 (Solomon & Rivolo 1989). • COBE found slightly higher luminosities in higher transitions (Bennett et al 1994) → adopt L’co = 5x108 K km s-1pc2. • At z=3 → observe (3-2) or (4-3) transition in the 84-116 GHz atmospheric band → need to correct, but also higher TCMB providing higher backgro ...
... K km s-1pc2 (Solomon & Rivolo 1989). • COBE found slightly higher luminosities in higher transitions (Bennett et al 1994) → adopt L’co = 5x108 K km s-1pc2. • At z=3 → observe (3-2) or (4-3) transition in the 84-116 GHz atmospheric band → need to correct, but also higher TCMB providing higher backgro ...
Distance to VY Canis Majoris with VERA
... zone” of the HR diagram, which is on the right-hand side of the Hayashi track (see figure 4). Massey et al. (2006) reexamined the effective temperature, and obtained a new value of 3650 ˙ 25 K based on optical spectrophotometry combined with a stellar atmosphere model, and suggested that the luminos ...
... zone” of the HR diagram, which is on the right-hand side of the Hayashi track (see figure 4). Massey et al. (2006) reexamined the effective temperature, and obtained a new value of 3650 ˙ 25 K based on optical spectrophotometry combined with a stellar atmosphere model, and suggested that the luminos ...