A5054878334- Astronomy and Astrophysical Research
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Galaxies: Formation, Evolution, Phenomena
- Adaptive optics and wavefront sensing
- History and Developments in Astronomy
- Laser-Plasma Interactions and Diagnostics
- Astrophysics and Star Formation Studies
- Radio Astronomy Observations and Technology
- Scientific Research and Discoveries
- Pulsars and Gravitational Waves Research
- X-ray Spectroscopy and Fluorescence Analysis
Laboratoire d’Etudes du Rayonnement et de la Matière en Astrophysique et Atmosphères
2024
Amazon (United States)
2023-2024
North Seattle College
2023-2024
Amazon (Germany)
2023
State University of New York
2007
Stony Brook University
2007
Abstract We used the Condor Array Telescope to obtain deep imaging observations through luminance broadband and He ii 468.6 nm, [O iii ] 500.7 i 587.5 H α , [N 658.4 [S 671.6 nm narrowband filters of an extended region comprising 13 “Condor fields” spanning ≈ 8 × deg 2 on sky centered near M81 M82. Here we describe acquisition processing these observations, which together constitute unique very a large portion Group complement broad- filters. The images are characterized by intricate web...
Abstract We used the Condor Array Telescope to obtain deep imaging observations through luminance broadband and He ii , [O iii ], i H α [N [S ] narrowband filters of an extended region M81 Group spanning ≈8 × 8 deg 2 on sky centered near M82. Here, we report aspects these that are specifically related (1) a remarkable filament known as “Ursa Major Arc” stretches ≈30° across roughly in direction Ursa Major, (2) “giant shell ionized gas” ≈0.8 located ≈0.6 northwest M82, (3) network gaseous...
Abstract The “Condor Array Telescope” or “Condor” is a high-performance “array telescope” comprised of six apochromatic refracting telescopes objective diameter 180 mm, each equipped with large-format, very low-read-noise (≈1.2 e − ), rapid-read-time (<1 s) CMOS camera. Condor located at dark astronomical site in the southwest corner New Mexico, Dark Sky Mexico observatory near Animas, roughly midway between (and more than 150 km from either) Tucson and El Paso. enjoys wide field view...
ABSTRACT Just 10 recurrent novae (RNe) – which erupt repeatedly on time-scales shorter than one century are known in our Galaxy. The most extreme RN (located the Andromeda galaxy), M31N 2008-12a, undergoes a nova eruption every year, and is surrounded by vast ‘super-remnant’, 134 pc extent. Simulations predict that all RNe should be similar shells, but previous searches have failed to detect them. KT Eri has recently been suggested RN, we used Condor Array Telescope image its environs...
ABSTRACT The existence of a vast nova shell surrounding the prototypical dwarf Z Camelopardalis (Z Cam) proves that some old novae undergo metamorphosis to appear as thousands years after eruption. expansion rates ancient shells offer way constrain both time between eruptions and for post-nova mass transfer decrease significantly, simultaneously testing thermonuclear runaway models hibernation theory. Previous limits on rate part Cam inter-eruption events be &gt;1300 yr. Deeper...
The Large Zenith Telescope is a 6 m optical telescope employing rotating primary mirror coated with film of liquid mercury. Located at an altitude 400 in the Coast Mountains southwestern British Columbia, this began regular operation 2005 October. Equipped four‐element Richardson prime‐focus corrector and thinned 2048 × pixel drift‐scanning CCD imaging camera, it used for astronomical survey observations also serves as engineering test facility further development liquid‐mirror technology....
Abstract A century or less separates the thermonuclear-powered eruptions of recurrent novae (RNe) in hydrogen-rich envelopes massive white dwarfs. The colliding ejecta successive RN events are predicted to always generate very large (tens parsecs) super-remnants; only two examples currently known. T CrB offers an excellent opportunity test this prediction. As it will almost certainly undergo its next, once ∼80 yr event between 2024 and 2026, we carried out deep narrowband continuum imaging...
ABSTRACT We used the Condor array telescope to obtain deep imaging observations through luminance filter of entirety NGC 5866 Group, including a very extended region surrounding galaxy 5907 and its stellar stream. find that stream consists single curved structure stretches 220 kpc from brighter eastern fainter western bends north then curls back toward galaxy. This result runs contrary previous claim second loop but is consistent with another description overall morphology further that: (1)...
ABSTRACT A nova super-remnant (NSR) is an immense structure associated with a that forms when frequent and recurrent (RN) eruptions sweep up surrounding interstellar medium (ISM) into high-density distant shell. The prototypical NSR, measuring over 100 pc across, was discovered in 2014 around the annually erupting M 31N 2008-12a. Hydrodynamical simulations demonstrated creation of dynamic NSR by repeated transporting large quantities ISM not only feasible but these structures should exist...
Just 10 recurrent novae (RNe) - which erupt repeatedly on timescales shorter than one century are known in our Galaxy. The most extreme RN (located the Andromeda galaxy), M31N 2008-12a, undergoes a nova eruption every year, and is surrounded by vast "super-remnant", 134 pc extent. Simulations predict that all RNe should be similar shells, but previous searches have failed to detect them. KT Eri has recently been suggested RN, we used Condor Array Telescope image its environs through multiple...
Classical nova eruptions result from thermonuclear-powered runaways in, and ejection of, the hydrogen-rich envelopes of white dwarf stars accreted their close binary companions. Novae brighten to up 1,000,000 solar luminosities, recur thousands times over lifetimes spanning several billion years. Between eruptions, mass transfer donor star proceeds via an accretion disk unless possesses a strong magnetic field which can partially or totally disrupt disk. In that case, is focussed by dwarf's...
We used the Condor Array Telescope to obtain deep imaging observations through luminance broad-band and He II, [O III], I, H$\alpha$, [N II], [S II] narrow-band filters of an extended region M81 Group spanning $\approx 8 \times 8$ deg$^2$ on sky centered near M82. Here we report aspects these that are specifically related (1) a remarkable filament known as "Ursa Major Arc" stretches 30$ deg roughly in direction Ursa Major, (2) "Giant Shell Ionized Gas" 0.8$ located 0.6$ NW M82, (3) network...
We used the Condor Array Telescope to obtain deep imaging observations through luminance filter of entirety NGC 5866 Group, including a very extended region surrounding galaxy 5907 and its stellar stream. find that stream consists single curved structure stretches $220$ kpc from brighter eastern fainter western bends north then curls back toward galaxy. This result runs contrary previous claim second loop but is consistent with another description overall morphology further that: (1) an...
The "Condor Array Telescope" or "Condor" is a high-performance "array telescope" comprised of six apochromatic refracting telescopes objective diameter 180 mm, each equipped with large-format, very low-read-noise ($\approx 1.2$ e$^-$), rapid-read-time ($< 1$ s) CMOS camera. Condor located at dark astronomical site in the southwest corner New Mexico, Dark Sky Mexico observatory near Animas, roughly midway between (and more than 150 km from either) Tucson and El Paso. enjoys wide field view...
A nova super-remnant (NSR) is an immense structure associated with a that forms when frequent and recurrent eruptions sweep up surrounding interstellar material (ISM) into high density distant shell. The prototypical NSR, measuring over 100 pc across, was discovered in 2014 around the annually erupting M31N 2008-12a. Hydrodynamical simulations demonstrated creation of dynamic NSR by repeated transporting large quantities ISM not only feasible but these structures should exist all novae,...