Discovery of a 25 parsec-long precessing jet emanating from the old nova GK Persei

Autor: Shara, Michael M., Lanzetta, Kenneth M., Garland, James T., Valls-Gabaud, David, Gromoll, Stefan, Misiura, Mikita, Walter, Frederick M., Webb, John K., Martin, Barrett

Classical nova eruptions result from thermonuclear-powered runaways in, and ejection of, the hydrogen-rich envelopes of white dwarf stars accreted from their close binary companions. Novae brighten to up to 1,000,000 solar luminosities, and recur tho

Externí odkaz: http://arxiv.org/abs/2410.12103

Introducing the Condor Array Telescope: IV. A possible nova super-remnant surrounding the putative recurrent nova KT Eridani

Autor: Shara, Michael M., Lanzetta, Kenneth M., Garland, James T., Gromoll, Stefan, Valls-Gabaud, David, Walter, Frederick M., Webb, John K., Kniazev, Alexei, Townsend, Lee, Darnley, Matthew J., Healy-Kalesh, Michael, Corral-Santana, Jesus, Schmidtobreick, Linda

Just 10 recurrent novae (RNe) - which erupt repeatedly on timescales shorter than one century - are known in our Galaxy. The most extreme RN known (located in the Andromeda galaxy), M31N 2008-12a, undergoes a nova eruption every year, and is surround

Externí odkaz: http://arxiv.org/abs/2310.17055

Introducing the Condor Array Telescope. II. Deep imaging observations of the edge-on spiral galaxy NGC 5907 and the NGC 5866 Group: yet another view of the iconic stellar stream

Autor: Lanzetta, Kenneth M., Gromoll, Stefan, Shara, Michael M., Berg, Stephen, Garland, James, Mancini, Evan, Valls-Gabaud, David, Walter, Frederick M., Webb, John K.

We used the Condor Array Telescope to obtain deep imaging observations through the luminance filter of the entirety of the NGC 5866 Group, including a very extended region surrounding the galaxy NGC 5907 and its stellar stream. We find that the stell

Externí odkaz: http://arxiv.org/abs/2309.17248

Speckle Imaging of Gamma2 Velorum: The Inner Wind Possibly Resolved

Autor: Shara, Michael M., Howell, Steve B., Furlan, Elise, Garland, James T., Moffat, Anthony F. J., Zurek, David

Accurately quantifying the rates dM/dt at which massive stars lose mass is essential to any understanding of their evolution. All dM/dt estimates to date assume wind clumping factors; not allowing for clumping leads to overestimates of dM/dt and unde

Externí odkaz: http://arxiv.org/abs/2308.07443

Low precision logarithmic number systems: Beyond base-2

Autor: Alam, Syed Asad, Garland, James, Gregg, David

Publikováno v: Syed Asad Alam, James Garland, and David Gregg. 2021. Low-precision Logarithmic Number Systems: Beyond Base-2. ACM Trans. Archit. Code Optim. 18, 4, Article 47 (December 2021), 25 pages

Logarithmic number systems (LNS) are used to represent real numbers in many applications using a constant base raised to a fixed-point exponent making its distribution exponential. This greatly simplifies hardware multiply, divide and square root. LN

Externí odkaz: http://arxiv.org/abs/2102.06681