Zobrazeno 1 - 10
of 261
pro vyhledávání: '"Moss Adam"'
Autor:
Jewett, Gracyn, Kilic, Mukremin, Bergeron, Pierre, Moss, Adam, Blouin, Simon, Brown, Warren R., Kosakowski, Alekzander, Toonen, Silvia, Agüeros, Marcel A.
We present a detailed model atmosphere analysis of massive white dwarfs with $M > 0.9~M_\odot$ and $T_{\rm eff}\geq11,000$ K in the Montreal White Dwarf Database 100 pc sample and the Pan-STARRS footprint. We obtained follow-up optical spectroscopy o
Externí odkaz:
http://arxiv.org/abs/2407.04827
Autor:
Kilic, Mukremin, Bergeron, Pierre, Blouin, Simon, Jewett, Gracyn, Brown, Warren R., Moss, Adam
Four years after the discovery of a unique DAQ white dwarf with a hydrogen-dominated and carbon-rich atmosphere, we report the discovery of four new DAQ white dwarfs, including two that were not recognized properly in the literature. We find all five
Externí odkaz:
http://arxiv.org/abs/2403.08878
Publikováno v:
Open Astronomy, Vol 26, Iss 1, Pp 270-274 (2017)
We present the detection of an additional pulsation mode (7.35 mHz) of a subdwarf B star, PG 1613+426, and periodic Observed minus Calculated (O-C) variations for two existing pulsations. PG 1613+426 is near the hot end of the sdB instability strip.
Externí odkaz:
https://doaj.org/article/7130faaff89d4ec49b6424a28fd1ce21
Autor:
Moss, Adam, Bergeron, P., Kilic, Mukremin, Jewett, Gracyn, Brown, Warren R., Kosakowski, Alekzander, Vincent, Olivier
We report the discovery of spectroscopic variations in the magnetic DBA white dwarf SDSS J091016.43+210554.2. Follow-up time-resolved spectroscopy at the Apache Point Observatory (APO) and the MMT show significant variations in the H absorption lines
Externí odkaz:
http://arxiv.org/abs/2312.05749
Publikováno v:
Journal of Cosmology and Astroparticle Physics, Volume 2024, May 2024
A wide class of scalar field models including Quintessence and K-essence have the attractive property of tracker regimes, where the energy density stored in the field evolves so as to mimic that of the dominant background component for a period of ti
Externí odkaz:
http://arxiv.org/abs/2309.15295
The chameleon is a theorised scalar field that couples to matter and possess a screening mechanism, which weakens observational constraints from experiments performed in regions of higher matter density. One consequence of this screening mechanism is
Externí odkaz:
http://arxiv.org/abs/2308.00844
We present our findings on the spectral analysis of seven magnetic white dwarfs that were presumed to be double degenerates. We obtained time-resolved spectroscopy at the Gemini Observatory to look for evidence of binarity or fast rotation. We find t
Externí odkaz:
http://arxiv.org/abs/2306.09254
Autor:
Kilic, Mukremin, Córsico, Alejandro H., Moss, Adam G., Jewett, Gracyn, De Gerónimo, Francisco C., Althaus, Leandro G.
We present APO and Gemini time-series photometry of WD J004917.14$-$252556.81, an ultramassive DA white dwarf with $T_{\rm eff} = 13020$ K and $\log{g} = 9.34$. We detect variability at two significant frequencies, making J0049$-$2525 the most massiv
Externí odkaz:
http://arxiv.org/abs/2304.10330
Publikováno v:
E3S Web of Conferences, Vol 89, p 02003 (2019)
Many workers have recognised the link between Nuclear Magnetic Resonance (NMR) derived T2 distributions and pore size distributions in reservoir rocks. This property has been used to develop models to obtain primary drainage capillary pressure curves
Externí odkaz:
https://doaj.org/article/98d3e5ea099a4bf2b43cedc7dd9ec16b