A5027261233- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- CCD and CMOS Imaging Sensors
- Adaptive optics and wavefront sensing
- Astrophysics and Cosmic Phenomena
- History and Developments in Astronomy
- Infrared Target Detection Methodologies
- Astro and Planetary Science
- Spectroscopy and Laser Applications
- Calibration and Measurement Techniques
- Solar and Space Plasma Dynamics
- Geophysics and Gravity Measurements
- Scientific Research and Discoveries
- Computational Physics and Python Applications
- Particle Accelerators and Free-Electron Lasers
- Atmospheric Ozone and Climate
- Advanced Semiconductor Detectors and Materials
- Planetary Science and Exploration
- Phase Equilibria and Thermodynamics
- Photocathodes and Microchannel Plates
U.S. National Science Foundation
1999-2018
American Astronomical Society
2017
W.M. Keck Observatory
2008-2015
Australian National University
2015
National Astronomical Observatory of Japan
2015
Ames Research Center
2015
Max Planck Institute for Radio Astronomy
2015
Community Science and Data Center
2013
Kitt Peak National Observatory
2003-2012
Netherlands Institute for Radio Astronomy
2009-2010
The HI Parkes All-Sky Survey (HIPASS) Catalogue forms the largest uniform catalogue of sources compiled to date, with 4,315 identified purely by their content. data comprise southern region declination <+2 deg HIPASS, first blind survey cover entire sky. RMS noise for this is 13 mJy/beam and velocity range -1,280 12,700 km/s. Data search, verification parametrization methods are discussed along a description measured quantities. Full made available astronomical community including positions,...
The acquisition of H i Parkes All Sky Survey (HIPASS) southern sky data commenced at the Australia Telescope National Facility's 64-m telescope in 1997 February, and was completed 2000 March. HIPASS is deepest survey yet south declination +2°, sensitive to emission out 170 h75−1 Mpc. characteristic root mean square noise images 13.3 mJy. This paper describes observations, which comprise 23 020 eight-degree scans 9-min duration, details techniques used calibrate image data. processing...
We present the HIPASS Bright Galaxy Catalog (BGC), which contains 1000 H I brightest galaxies in southern sky as obtained from Parkes All-Sky Survey (HIPASS). The selection of sources is based on their peak flux density (Speak ≳ 116 mJy) measured spatially integrated spectrum. derived masses range ∼107 to 4 × 1010 M⊙. While BGC (z < 0.03) complete Speak, only a subset ∼500 can be considered (F 25 Jy km s-1). total 158 new redshifts. These belong 91 for no optical or infrared counterparts...
view Abstract Citations (459) References (43) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The FCRAO Extragalactic CO Survey. I. Data Young, Judith S. ; Xie, Shuding Tacconi, Linda Knezek, Pat Viscuso, Paul Tacconi-Garman, Lowell Scoville, Nick Schneider, Steve Schloerb, F. Peter Lord, Lesser, Amy Kenney, Jeff Huang, Yi-Long Devereux, Claussen, Mark Case, James Carpenter, John Berry, Mike Allen, Lori Emission from the molecule at λ = 2.6 mm has been...
Many results in modern astrophysics rest on the notion that Initial Mass Function (IMF) is universal. Our observations of HI selected galaxies light H-alpha and far-ultraviolet (FUV) challenge this notion. The flux ratio H-alpha/FUV from these two star formation tracers shows strong correlations with surface-brightness R band: Low Surface Brightness (LSB) have lower ratios compared to High expectations equilibrium models using commonly favored IMF parameters. Weaker but significant...
We introduce the Survey for Ionization in Neutral Gas Galaxies (SINGG), a census of star formation HI-selected galaxies. The survey consists H-alpha and R-band imaging sample 468 galaxies selected from HI Parkes All Sky (HIPASS). spans three decades mass is free many biases that affect other forming galaxy samples. present criteria selection, list entire sample, discuss our observational techniques, describe data reduction calibration methods. This paper focuses on 93 SINGG targets whose...
We present the largest catalogue to date of optical counterparts for HI radio-selected galaxies, Hopcat. Of 4315 radio-detected sources from Parkes All Sky Survey (Hipass) catalogue, we find 3618 (84%) galaxies. these, 1798 (42%) have confirmed velocities and 848 (20%) are single matches without velocities. Some galaxy members groups. From these multiple matches, 714 (16%) a further 258 (6%) galaxies For 481 (11%), but no counterpart can be chosen 216 (5%) obvious present. Most 'blank...
We use the first data release from SINGG H-alpha survey of HI-selected galaxies to study quantitative behavior diffuse, warm ionized medium (WIM) across range properties represented by these 109 galaxies. The mean fraction f_WIM diffuse gas in this sample is 0.59+/- 0.19, slightly higher than found previous samples. Since lower surface-brightness tend have f_WIM, we believe that most difference due selection effects favoring large, optically-bright, nearby with high star-formation rates. As...
We present a new accurate measurement of the HI mass function galaxies from HIPASS Bright Galaxy Catalog, sample 1000 with highest peak flux densities in southern hemisphere (Koribalski et al. 2003). This spans nearly four orders magnitude (from log M_HI/M_sun=6.8 to 10.6, H0=75) and is largest selected date. develop bivariate maximum likelihood technique measure space density galaxies, show that this robust method, insensitive effects large scale structure. The resulting can be fitted...
A catalog of Southern anomalous-velocity HI clouds at Decl. < +2 deg is presented, based on data from the Parkes All-Sky Survey (HIPASS). The improved sensitivity (5sigma: T_B = 0.04 K) and resolution (15.5') HIPASS results in a substantial increase number individual (1956, as well 41 galaxies) compared to previous surveys. Most high-velocity emission features, HVCs, have filamentary morphology are loosely organized into large complexes extending over tens degrees. In addition, 179...
view Abstract Citations (223) References (34) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Ratio of Molecular to Atomic Gas in Spiral Galaxies as a Function Morphological Type Young, Judith S. ; Knezek, Patricia M. As part the FCRAO Extragalactic CO Survey, we have observed λ2.6 mm emission along major axis 142 galaxies. We find that ratio molecular atomic gas among spiral galaxies decreases by factor ~ 20 function morphological type; mean M(H_2_)/M(H...
The Northern HIPASS catalogue (NHICAT) is the northern extension of catalogue, HICAT (Meyer et al. 2004). This adds sky area between declination range +2 deg < dec. +25.5 to HICAT's -90 deg. a blind HI survey using Parkes Radio Telescope covering 71% (including this extension) and heliocentric velocity -1,280 km/s 12,700 . entire Virgo Cluster region has been observed in HIPASS. galaxy NHICAT, contains 1002 sources with v_hel > 300 Sources -300 were excluded avoid contamination by...
[abridged] We describe the first results from NOAO Outer Limits Survey. The survey consists of deep images 55 0.6x0.6 degree fields at distances up to 20 degrees LMC/SMC, and 10 controls. probe outer structure Clouds, Magellanic Stream, Leading Arm, wake new LMC orbit. Images were taken in 5 filters on CTIO Blanco 4-m Mosaic2 camera, with calibration 0.9-m. CRI reach depths below oldest LMC/SMC main sequence (MS) turnoffs, yielding probes combined ability measure stellar ages metallicities....
The HI Parkes All Sky Survey (HIPASS) is a blind extragalactic 21-cm emission line survey covering the whole southern sky from declination -90 to +25. HIPASS catalogue (HICAT), containing 4315 HI-selected galaxies region south of +2, presented in Meyer et al. (2004a, Paper I). This paper describes detail completeness and reliability HICAT, which are calculated recovery rate synthetic sources follow-up observations, respectively. HICAT found be 99 per cent complete at peak flux 84 mJy an...
Using imaging that shows four magnitudes of main sequence stars, we have discovered the Galactic globular cluster NGC 1851 is surrounded by a halo visible from tidal radius 700 arcsec (41 pc) to more than 4500 (>250 pc). This symmetric and falls in density as power law $r^{-1.24}$. It contains approximately 0.1% dynamical mass 1851. There no evidence for tails. Current models evolution do not explain this feature, although simulations influences on dwarf spheroidal galaxies qualitatively...
We present near-infrared light curves of supernova (SN) 2011fe in M101, including 34 epochs H band starting 14 days before maximum brightness the B band. The curve data were obtained with WIYN High-Resolution Infrared Camera. When are calibrated using templates other Type Ia SNe, we derive an apparent H-band magnitude at epoch B-band 10.85 ± 0.04. This implies a distance modulus for M101 that ranges from 28.86 to 29.17 mag, depending on which absolute calibration SNe is used.
A number of very small isolated HII regions have been discovered at projected distances up to 30 kpc from their nearest galaxy. These appear as tiny emission line objects in narrow band images obtained by the NOAO Survey for Ionization Neutral Gas Galaxies (SINGG). We present spectroscopic confirmation four two systems, both systems tidal HI features. The results are consistent with stars forming interactive debris due cloud-cloud collisions. H-alpha luminosities equivalent ionizing flux...
We present results from the first systematic search for outlying H ii regions, as part of a sample 96 emission-line point sources (referred to ELdots–emission-line dots) derived NOAO Survey Ionization in Neutral Gas Galaxies (SINGG). Our automated ELdot finder searches SINGG narrowband and continuum images high equivalent width outside optical radius target galaxy (>2 × r25 R band). Follow-up long-slit spectroscopy deep Galaxy Evolution Explorer (GALEX) (exposure time >1000 s) distinguish...
We have commenced a 21 cm survey of the entire southern sky (δ < 0°, -1200 km s-1 v☉ 12,700 s-1) that is "blind," i.e., unbiased by previous optical information. In present paper we report on results pilot project based data from this all-sky survey. The was carried out an area 600 deg2 centered nearby Centaurus A (Cen A) group galaxies at mean velocity ~ 500 s-1. This recently subject separate and thorough found 10 new members to add already known in Cen group: five these are previously...
We derive observed Halpha and R band luminosity densities of an HI-selected sample nearby galaxies using the SINGG to be l_Halpha' = (9.4 +/- 1.8)e38 h_70 erg s^-1 Mpc^-3 for l_R' (4.4 0.7)e37 A^-1 in band. This density is approximately 70% that found by Sloan Digital Sky Survey. leads a local star formation rate log(SFRD) -1.80 +0.13/-0.07(random) 0.03(systematic) + log(h_70) after applying mean internal extinction correction 0.82 magnitudes. The gas cycling time this t_gas 7.5 +1.3/-2.1...
Although ordinary chondrite material dominates meteorite falls, the identification of a main-belt asteroid source has remained elusive. From new survey more than 80 small asteroids comes discovery one having visible and near-infrared reflectance spectrum similar to L6 LL6 meteorites. Asteroid 3628 BoZnemcová an estimated diameter 7 kilometers is located in vicinity 3:1 Jovian resonance, predicted region. spectral match may indicate existence within main belt, paucity such detections remains...
We report the discovery from H I Parkes All-Sky Survey (HIPASS) of a gas cloud associated with asymmetric spiral galaxy NGC 2442. This object, designated HIPASS J0731-69, contains ~109 M☉ I, or nearly one-third as much atomic 2442 itself. No optical counterpart to any part J0731-69 has yet been identified, consistent being diffuse and its streamlike kinematics. If in was once 2442, then it most likely fairly recent tidal encounter moderately massive companion that tore loose, although...