A5011057760- Gamma-ray bursts and supernovae
- Astronomy and Astrophysical Research
- Pulsars and Gravitational Waves Research
- Stellar, planetary, and galactic studies
- Astrophysics and Cosmic Phenomena
- Astronomical Observations and Instrumentation
- Astro and Planetary Science
- Astrophysical Phenomena and Observations
- Astrophysics and Star Formation Studies
- Spectroscopy and Laser Applications
- Atmospheric Ozone and Climate
- Inertial Sensor and Navigation
- Geological and Geophysical Studies
- Animal and Plant Science Education
- Scientific Research and Discoveries
- Species Distribution and Climate Change
- Adaptive optics and wavefront sensing
- Geophysics and Gravity Measurements
- Zoonotic diseases and public health
- Phase Equilibria and Thermodynamics
University of Arizona
2009-2024
Optica
2012
University of California, Berkeley
2009
We present extensive photometry at ultraviolet (UV), optical, and near-infrared (NIR) wavelengths, as well dense sampling of optical spectra, for the normal type Ia supernova (SN Ia) 2005cf. From well-sampled light curves, we find that SN 2005cf reached a B-band maximum 13.63+/-0.02 mag, with an observed luminosity decline rate dm_15(B) = 1.05+/-0.03 mag. The correlations between various color indexes, recalibrated on basis expanded sample, yielded E(B-V)_host=0.09+/-0.03 mag SN2005cf. UV...
The Orion molecular cloud complex harbours the nearest GMCs and site of high-mass star formation. Its YSO populations are thoroughly characterized. region is therefore a prime target for study Here, we verify performance SuperCAM 64 pixel heterodyne array on APEX. We give descriptive overview set wide-field CO(3-2) spectral cubes obtained towards GMC complex, aimed at characterizing dynamics structure extended gas in diverse regions clouds, ranging from very active sites clustered formation...
We report the detection of a radial velocity companion to extremely low-mass white dwarf (WD) LP400−22. The WD shows variations with semiamplitude 119 km s−1 and 0.98776 day period, which implies mass M ⩾ 0.37 M☉. optical photometry rules out main-sequence companion. Thus invisible is another or neutron star. Using proper-motion measurements binary system, we find that it has an unusual Galactic orbit. LP400−22 moving away from center 396 ± 43 s−1, very difficult explain by supernova runaway...
Context . The Small Magellanic Cloud (SMC) is an ideal laboratory for studying the properties of star-forming regions thanks to its low metallicity, which has impact on molecular gas abundance. However, a small number surveys entire galaxy have been carried out in last few years, limiting measurements interstellar medium (ISM) homogeneous manner. Aims We present CO(3-2) APEX survey at 6 pc resolution bar SMC, observed with SuperCAM receiver attached telescope. This high-resolution allowed us...
We present two epochs of observations TW Hya from the high-dispersion near-IR spectrograph ARIES at Multiple Mirror Telescope. detect strong emission Brγ transition hydrogen, indicating an accretion rate substantially larger than previously estimated, using hydrogen line emission. The strength varies across our observed epochs. also measure circumstellar-to-stellar flux ratios (i.e., veilings) that appear close to zero in both These findings suggest experiences episodes enhanced while inner...
Recently, Dufour et al. (2007) reported the unexpected discovery that a few white dwarfs found in Sloan Digital Sky Survey had an atmosphere dominated by carbon with little or no trace of hydrogen and helium. Here we present progress report on these new objects based high signal-to-noise follow-up spectroscopic observations obtained at 6.5m MMT telescope Mount Hopkins, Arizona.
We present the CO(3-2) APEX survey at 6 pc resolution of bar SMC. aboard CO analysis in SMC-Bar comparing with that CO(2-1) similar resolution. study CO(3-2)-to-CO(2-1) ratio (R32) is very sensitive to environment properties (e.g., star-forming regions). analyzed correlation this observational quantities trace star formation as local emission, Spitzer color [70/160], and total IR surface brightness measured from Herschel bands. For identification clouds, we used CPROPS algorithm, which...