Results 91 to 100 of about 299 (188)

A Unified Model for Shock Interaction and γ-Ray Emission in Classical Novae

The Astrophysical Journal
We present a parameterized (“toy”) model for shock interaction and γ -ray emission in classical novae, in which a white dwarf envelope of mass M _env is removed over a timescale τ (proportional to the nova speed class, t _2 ) in an outflow that ...
Rebecca Diesing, Brian D. Metzger
doaj   +1 more source

Mapping edaphic soils' conditions to identify conservation targets for pine barren and sandplain ecosystems in New York State. [PDF]

Ecol Evol, 2022
Corbin JD, Flatland EL.
europepmc   +1 more source

A Phenomenon Resembling Early Superhumps in a New SU UMa-type Dwarf Nova with a 2 hr Orbital Period

The Astronomical Journal
We investigate K2BS5, an optical transient that we identified in Campaign 13 of the Kepler/K2 archives by the K2 Background Survey, and classify it as a new SU UMa-type dwarf nova.
Rebecca S. Boyle, Colin Littlefield, Peter Garnavich, Ryan Ridden-Harper, Paula Szkody, Patricia Boyd, Krista Lynne Smith   +6 more
doaj   +1 more source

X-Ray Flashes on Helium Novae

The Astrophysical Journal
A helium nova occurs on a white dwarf (WD) accreting hydrogen-deficient matter from a helium star companion. When the mass of a helium envelope on the WD reaches a critical value, unstable helium burning ignites to trigger a nova outburst.
Mariko Kato, Izumi Hachisu
doaj   +1 more source

ASASSN-16dv: Superhumps in a Long-period X-Ray-luminous Dwarf Nova

The Astronomical Journal
Combining a long-term light curve, four-color rapid photometry, and spectroscopic and X-ray observations with a 27-day time base TESS light curve, we present the first dedicated study of ASASSN-16dv, detected as a transient in the All-Sky Automated ...
Albert Bruch, Raimundo Lopes de Oliveira, Amanda Silva de Araujo, Romualdo Eleutério, Angela Cristina Krabbe, Koji Mukai   +5 more
doaj   +1 more source

Phosphorus-rich stars with unusual abundances are challenging theoretical predictions. [PDF]

Nat Commun, 2020
Masseron T, García-Hernández DA, Santoveña R, Manchado A, Zamora O, Manteiga M, Dafonte C.   +6 more
europepmc   +1 more source

Discovery of the first outbursting hot subdwarf binary: ZTF J0007+4804

Astronomy & Astrophysics
Context. Hot subdwarf binaries with white dwarf companions with orbital periods of less than two hours are progenitor candidates for massive single white dwarfs as well as a variety of thermonuclear explosions. Aims.
Stringer E., Kupfer T., Deshmukh K., Maccarone T., Jackson I., Kosakowski A., Bradshaw C. W., Brown A., Dorsch M., Picco A., Dhillon V. S., Poshyachinda S., Awiphan S.   +12 more
doaj   +1 more source

Synergies of THESEUS with the large facilities of the 2030s and guest observer opportunities. [PDF]

Exp Astron (Dordr), 2021
Rosati P, Basa S, Blain AW, Bozzo E, Branchesi M, Christensen L, Ferrara A, Gomboc A, O'Brien PT, Osborne JP, Rossi A, Schüssler F, Spurio M, Stergioulas N, Stratta G, Amati L, Casewell S, Ciolfi R, Ghirlanda G, Grimm S, Guetta D, Harms J, Le Floc'h E, Longo F, Maggiore M, Mereghetti S, Oganesyan G, Salvaterra R, Tanvir NR, Turriziani S, Vergani SD, Balman S, Caruana J, Erkut MH, Guidorzi G, Frontera F, Martin-Carrillo A, Paltani S, Porquet D, Sergijenko O.   +39 more
europepmc   +1 more source

Binary Parameters for the Recurrent Nova T Coronae Borealis

The Astrophysical Journal
T CrB is among the brightest novae. It is recurrent with outbursts happening approximately every 80 yr. The next outburst is imminent, expected in 2025. The T CrB binary consists of an M4 III red giant (RG) secondary and a white dwarf (WD) primary.
Kenneth H. Hinkle, Pranav Nagarajan, Francis C. Fekel, Joanna Mikołajewska, Oscar Straniero, Matthew W. Muterspaugh   +5 more
doaj   +1 more source

The fungus Kalmusia longispora is able to cause vascular necrosis on Vitis vinifera. [PDF]

PLoS One, 2021
Karácsony Z, Knapp DG, Lengyel S, Kovács GM, Váczy KZ.   +4 more
europepmc   +1 more source