Zobrazeno 1 - 10
of 357
pro vyhledávání: '"Garmire, Gordon"'
Autor:
Zuo, Zihao, Zhu, Shifu, Brandt, W. N., Garmire, Gordon P., Vito, F., Wu, Jianfeng, Xue, Yongquan
Highly radio-loud quasars (HRLQs; $\log R>2.5$) at $z\gtrsim 4$ show apparent enhanced X-ray emission compared to matched HRLQs at lower redshifts, perhaps due to a redshift-dependent fractional contribution to the X-ray luminosity from inverse-Compt
Externí odkaz:
http://arxiv.org/abs/2402.17828
Autor:
Calzadilla, Michael S., McDonald, Michael, Benson, Bradford A., Bleem, Lindsey E., Croston, Judith H., Donahue, Megan, Edge, Alastair C., Floyd, Benjamin, Garmire, Gordon P., Hlavacek-Larrondo, Julie, Huynh, Minh T., Khullar, Gourav, Kraft, Ralph P., McNamara, Brian R., Noble, Allison G., Romero, Charles E., Ruppin, Florian, Somboonpanyakul, Taweewat, Voit, G. Mark
We present a multi-wavelength study of the brightest cluster galaxies (BCGs) in a sample of the 95 most massive galaxy clusters selected from South Pole Telescope (SPT) Sunyaev-Zeldovich (SZ) survey. Our sample spans a redshift range of 0.3 < z < 1.7
Externí odkaz:
http://arxiv.org/abs/2311.00396
Observations of the high-mass gamma-ray binary LS 2883/PSR B1259--63 with the Chandra X-ray Observatory during the 2011--2014 and 2014--2017 binary cycles have shown X-ray emitting clumps, presumably ejected from the binary during periastron passages
Externí odkaz:
http://arxiv.org/abs/2309.12156
We study the four-dimensional relationships between magnetic activity, rotation, mass and age for solar-type stars in the age range 5-25Myr. This is the late-pre-main sequence (l-PMS) evolutionary phase when rapid changes in star's interior may lead
Externí odkaz:
http://arxiv.org/abs/2305.09013
Autor:
Huang, Jian, Luo, Bin, Brandt, W. N., Du, Pu, Garmire, Gordon P., Hu, Chen, Liu, Hezhen, Ni, Qingling, Wang, Jian-Min
We report strong and rapid X-ray variability found from the super-Eddington accreting quasar SDSS J081456.10+532533.5 at $z=0.1197$. It has a black-hole mass of $2.7\times10^{7}{M_{\odot}}$ and a dimensionless accretion rate of $\approx4$ measured fr
Externí odkaz:
http://arxiv.org/abs/2304.07323
Publikováno v:
RNAAS (2022), 7, 52
LS 2883/PSR B1259-63 is a high mass, eccentric gamma-ray binary that has previously been observed to eject X-ray emitting material. We report the results of recent Chandra observations near binary apastron in which a new X-ray emitting clump of matte
Externí odkaz:
http://arxiv.org/abs/2303.13595
Autor:
Fu, Shuqi, Brandt, W. N., Zou, Fan, Laor, Ari, Garmire, Gordon P., Ni, Qingling, Timlin III, John D., Xue, Yongquan
We report results for a complete sample of ten luminous radio-quiet quasars with large C IV equivalent widths (EW > 150 A). For 8/10 we performed Chandra snapshot observations. We find that, in addition to the enhanced C IV line EW, their He II and M
Externí odkaz:
http://arxiv.org/abs/2206.11631
Autor:
Getman, Konstantin V., Feigelson, Eric D., Garmire, Gordon P., Broos, Patrick S., Kuhn, Michael A., Preibisch, Thomas, Airapetian, Vladimir S.
Measuring the evolution of X-ray emission from pre-main sequence (PMS) stars gives insight into two issues: the response of magnetic dynamo processes to changes in interior structure and the effects of high-energy radiation on protoplanetary disks an
Externí odkaz:
http://arxiv.org/abs/2203.02047
Getman et al. (2021) reports the discovery, energetics, frequencies, and effects on environs of $>1000$ X-ray super-flares with X-ray energies $E_X \sim 10^{34}-10^{38}$~erg from pre-main sequence (PMS) stars identified in the $Chandra$ MYStIX and SF
Externí odkaz:
http://arxiv.org/abs/2106.08262
Autor:
Zou, Fan, Brandt, William N., Vito, Fabio, Chen, Chien-Ting, Garmire, Gordon P., Stern, Daniel, Ayubinia, Ashraf
Dust-obscured galaxies (DOGs) with extreme infrared luminosities may represent a key phase in the co-evolution of galaxies and supermassive black holes. We select 12 DOGs at $0.3\lesssim z\lesssim1.0$ with broad Mg II or H$\beta$ emission lines and i
Externí odkaz:
http://arxiv.org/abs/2009.10763