Zobrazeno 1 - 10
of 80
pro vyhledávání: '"Christian, Damian J."'
Context. Magnetic bright points (MBPs) are one of the smallest manifestations of the magnetic field in the solar atmosphere and are observed to extend from the photosphere up to the chromosphere. As such, they represent an excellent feature to use in
Externí odkaz:
http://arxiv.org/abs/2409.11553
Autor:
Garofalo, David, Christian, Damian J., Hames, Chase, North, Max, Thottam, Keegan, Nazaroff, Samuel, Eckelbarger, Alisaie
Feedback from active galactic nuclei (AGN) has long been invoked to explain the correlation between black hole mass and stellar velocity dispersion (M-$\sigma$) discovered in low redshift galaxies. We describe the time evolution of AGN in the M-$\sig
Externí odkaz:
http://arxiv.org/abs/2304.02581
By exploring more than sixty thousand quasars from the Sloan Digital Sky Survey Data Release 5, Steinhardt & Elvis discovered a sub-Eddington boundary and a redshift-dependent drop-off at higher black hole mass, possible clues to the growth history o
Externí odkaz:
http://arxiv.org/abs/1906.06995
Autor:
Wolk, Scott J., Drake, Jeremy J., Branduardi-Raymont, Graziella, Poppenhaeger, Katja, Airapetian, Vladimir, France, Kevin, Sciortino, Salvatore, Pillitteri, Ignazio, Osten, Rachel A., Lisse, Carey M., Kashyap, Vinay, Wargelin, Brad, Wood, Brian, Dunn, Willaim, Principe, David, Günther, Moritz, Christian, Damian J., Alvarado-Gomez, Julian David, Dong, Chuanfei, Oskinova, Lidia, Karovska, Margarita, Moschou, Sofia P., Williams, Peter K., Smith, Randall, Snios, Bradford, Gallo, Elena, Danchi, William, Pye, John P., Kastner, Joel, Nascimento, Jose Dias Do, Hong, Jae-Sub
Over the last two decades, the discovery of exoplanets has fundamentally changed our perception of the universe and humanity's place within it. Recent work indicates that a solar system's X-ray and high energy particle environment is of fundamental i
Externí odkaz:
http://arxiv.org/abs/1904.04320
Autor:
Drake, Jeremy J., Alvarado-Gómez, Julián D., Airapetian, Vladimir, Cauley, P. Wilson, Argiroffi, Costanza, Browning, Matthew K., Christian, Damian J., Cohen, Ofer, Corrales, Lia, Danchi, William, de Val-Borro, Miguel, Dong, Chuanfei, Forman, William, France, Kevin, Gallo, Elena, Garcia-Sage, Katherine, Garraffo, Cecilia, Gelino, Dawn M., Gronoff, Guillaume, Günther, H. Moritz, Harper, Graham M., Haywood, Raphaëlle D., Karovska, Margarita, Kashyap, Vinay, Kastner, Joel, Kim, Jinyoung Serena, Leutenegger, Maurice A., Linsky, Jeffrey, López-Morales, Mercedes, Micela, Giusi, Moschou, Sofia-Paraskevi, Oskinova, Lidia, Osten, Rachel A., Owen, James E., Poppenhaeger, Katja, Principe, David A., Pye, John P., Sciortino, Salvatore, Tzanavaris, Panayiotis, Wargelin, Brad, Wheatley, Peter J., Williams, Peter K. G., Winston, Elaine, Wolk, Scott J.
It is now recognized that energetic stellar photon and particle radiation evaporates and erodes planetary atmospheres and controls upper atmospheric chemistry. Key exoplanet host stars will be too faint at X-ray wavelengths for accurate characterizat
Externí odkaz:
http://arxiv.org/abs/1903.12338
Autor:
Jess, David B., Dillon, Chris J., Kirk, Michael S., Reale, Fabio, Mathioudakis, Mihalis, Grant, Samuel D. T., Christian, Damian J., Keys, Peter H., Prasad, S. Krishna, Houston, Scott J.
Small-scale magnetic reconnection processes, in the form of nanoflares, have become increasingly hypothesized as important mechanisms for the heating of the solar atmosphere, for driving propagating disturbances along magnetic field lines in the Sun'
Externí odkaz:
http://arxiv.org/abs/1812.06978
We present multi-wavelength observations of an M-class flare (M3.9) that occurred on 2014 June 11. Our observations were conducted with the Dunn Solar Telescope (DST), adaptive optics, the multi-camera system ROSA (Rapid Oscillations in Solar Atmosph
Externí odkaz:
http://arxiv.org/abs/1811.07077
Autor:
Garofalo, David, Singh, Chandra B., Walsh, Dylan T., Christian, Damian J., Jones, Andrew M., Zack, Alexa, Webster, Brandt, Kim, Matthew I.
Flat spectrum radio quasars (FSRQs) and BL Lacs are powerful jet producing active galactic nuclei associated with supermassive black holes accreting at high and low Eddington rates, respectively. Based on the Millennium Simulation, Gardner and Done (
Externí odkaz:
http://arxiv.org/abs/1809.00724
Autor:
Keys, Peter H., Morton, Richard J., Jess, David B., Verth, Gary, Grant, Samuel D. T., Mathioudakis, Mihalis, Mackay, Duncan H., Doyle, John G., Christian, Damian J., Keenan, Francis P., Erdelyi, Robertus
Over the past number of years, great strides have been made in identifying the various low-order magnetohydrodynamic wave modes observable in a number of magnetic structures found within the solar atmosphere. However, one aspect of these modes that h
Externí odkaz:
http://arxiv.org/abs/1803.01859
Autor:
Jess, David B., Van Doorsselaere, Tom, Verth, Gary, Fedun, Viktor, Prasad, S. Krishna, Erdélyi, Robert, Keys, Peter H., Grant, Samuel D. T., Uitenbroek, Han, Christian, Damian J.
Solar chromospheric observations of sunspot umbrae offer an exceptional view of magneto-hydrodynamic wave phenomena. In recent years, a wealth of wave signatures related to propagating magneto-acoustic modes have been presented, which demonstrate com
Externí odkaz:
http://arxiv.org/abs/1705.06282