Zobrazeno 1 - 10
of 1 857
pro vyhledávání: '"Graham, P. W."'
Autor:
Fan, Xing, Gabrielse, Gerald, Graham, Peter W., Ramani, Harikrishnan, Wong, Samuel S. Y., Xiao, Yawen
We propose using highly excited cyclotron states of a trapped electron to detect meV axion and dark photon dark matter, marking a significant improvement over our previous proposal and demonstration [Phys. Rev. Lett. 129, 261801]. When the axion mass
Externí odkaz:
http://arxiv.org/abs/2410.05549
While much supersymmetric WIMP parameter space has been ruled out, one remaining important candidate is Higgsino dark matter. The Higgsino can naturally realize the ``inelastic dark matter" scenario, where the scattering off a nucleus occurs between
Externí odkaz:
http://arxiv.org/abs/2409.07768
We numerically investigate, through discrete element simulations, the steady flow of identical, frictionless spheres sheared between two parallel, bumpy planes in the absence of gravity and under a fixed normal load. We measure the spatial distributi
Externí odkaz:
http://arxiv.org/abs/2407.17397
Autor:
Davis, Benjamin L., Graham, Alister W., Soria, Roberto, Jin, Zehao, Karachentsev, Igor D., Karachentseva, Valentina E., D'Onghia, Elena
Publikováno v:
2024 ApJ 971 123
We analyzed images of every northern hemisphere Sd galaxy listed in the Third Reference Catalogue of Bright Galaxies (RC3) with a relatively face-on inclination ($\theta\leq30{\deg}$). Specifically, we measured the spiral arms' winding angle, $\phi$,
Externí odkaz:
http://arxiv.org/abs/2406.05778
Autor:
Graham, Alister W.
Lenticular galaxies are notoriously misclassified as elliptical galaxies and, as such, a (disc inclination)-dependent correction for dust is often not applied to the magnitudes of dusty lenticular galaxies. This results in overly red galaxy colours,
Externí odkaz:
http://arxiv.org/abs/2405.00944
Autor:
Graham, Peter W., Ramani, Harikrishnan
There is a large and growing interest in observations of small-scale structure in dark matter. We propose a new way to probe dark matter structures in the $\sim 10 - 10^8 \, M_\odot$ range. This allows us to constrain the primordial power spectrum ov
Externí odkaz:
http://arxiv.org/abs/2404.01378
Autor:
Małek, K., Junais, Pollo, A., Boquien, M., Buat, V., Salim, S., Brough, S., Demarco, R., Graham, A. W., Hamed, M., Mullaney, J. R., Romano, M., Sifón, C., Aravena, M., Benavides, J. A., Busà, I., Donevski, D., Dorey, O., Hernandez-Toledo, H. M., Nanni, A., Pearson, W. J., Pistis, F., Ragusa, R., Riccio, G., Román, J.
Large future sky surveys, such as the LSST, will provide optical photometry for billions of objects. This paper aims to construct a proxy for the far ultraviolet attenuation (AFUVp) from the optical data alone, enabling the rapid estimation of the st
Externí odkaz:
http://arxiv.org/abs/2401.12831
It has been suggested that the bulge-to-total stellar mass ratio or feedback from black holes (BHs), traced by the BH-to-(total stellar) mass ratio, might establish a galaxy's specific star formation rate (sSFR). We reveal that a galaxy's morphology
Externí odkaz:
http://arxiv.org/abs/2312.03999
Autor:
Graham, Peter W., Ramani, Harikrishnan
We place limits on dark matter made up of compact objects significantly heavier than a solar mass, such as MACHOs or primordial black holes (PBHs). In galaxies, the gas of such objects is generally hotter than the gas of stars and will thus heat the
Externí odkaz:
http://arxiv.org/abs/2311.07654
Many models of dark matter include self-interactions beyond gravity. A variety of astrophysical observations have previously been used to place limits on the strength of such self-interactions. However, previous works have generally focused either on
Externí odkaz:
http://arxiv.org/abs/2311.07648