ﻻ يوجد ملخص باللغة العربية
We use combined South Pole Telescope (SPT)+Planck temperature maps to analyze the circumgalactic medium (CGM) encompassing 138,235 massive, quiescent 0.5 $leq$ z $leq$ 1.5 galaxies selected from data from the Dark Energy Survey (DES) and Wide-Field Infrared Survey Explorer (WISE). Images centered on these galaxies were cut from the 1.85 arcmin resolution maps with frequency bands at 95, 150, and 220 GHz. The images were stacked, filtered, and fit with a gray-body dust model to isolate the thermal Sunyaev-Zeldovich (tSZ) signal, which is proportional to the total energy contained in the CGM of the galaxies. We separate these $M_{star} = 10^{10.9} M_odot$ - $10^{12} M_odot$ galaxies into 0.1 dex stellar mass bins, detecting tSZ per bin up to $5.6sigma$ and a total signal-to-noise ratio of $10.1sigma$. We also detect dust with an overall signal-to-noise ratio of $9.8sigma$, which overwhelms the tSZ at 150GHz more than in other lower-redshift studies. We correct for the $0.16$ dex uncertainty in the stellar mass measurements by parameter fitting for an unconvolved power-law energy-mass relation, $E_{rm therm} = E_{rm therm,peak} left(M_star/M_{star,{rm peak}} right)^alpha$, with the peak stellar mass distribution of our selected galaxies defined as $M_{star,{rm peak}}= 2.3 times 10^{11} M_odot$. This yields an $E_{rm therm,peak}= 5.98_{-1.00}^{+1.02} times 10^{60}$ erg and $alpha=3.77_{-0.74}^{+0.60}$. These are consistent with $z approx 0$ observations and within the limits of moderate models of active galactic nuclei (AGN) feedback. We also compute the radial profile of our full sample, which is similar to that recently measured at lower-redshift by Schaan et al. (2021).
We present an investigation of clumpy galaxies in the Hubble Ultra Deep Field at 0.5 $leq z leq$ 1.5 in the rest-frame far-ultraviolet (FUV) using HST WFC3 broadband imaging in F225W, F275W, and F336W. An analysis of 1,404 galaxies yields 209 galaxie
Using the CANDELS photometric catalogs for the HST/ACS and WFC3, we identified massive evolved galaxies at $3 < z < 4.5$, employing three different selection methods. We find the comoving number density of these objects to be $sim 2 times 10^{-5}$ an
In the present universe, magnetic fields exist with various strengths and on various scales. One possible origin of these cosmic magnetic fields is the primordial magnetic fields (PMFs) generated in the early universe. PMFs are considered to contribu
The presence of ubiquitous magnetic fields in the universe is suggested from observations of radiation and cosmic ray from galaxies or the intergalactic medium (IGM). One possible origin of cosmic magnetic fields is the magnetogenesis in the primordi
We characterise the thermal state of the intergalactic medium (IGM) in ten redshift bins in the redshift range $2 leq z leq 4$ with a sample of 103 high resolution, high S/N Ly$alpha$ forest spectra using four different flux distribution statistics.