Matches in SemOpenAlex for { <https://semopenalex.org/work/W3100835325> ?p ?o ?g. }
- W3100835325 endingPage "L23" @default.
- W3100835325 startingPage "L23" @default.
- W3100835325 abstract "FRB 121102 is the only known repeating fast radio burst source. Here we analyze a wide-frequency-range (1–8 GHz) sample of high signal-to-noise, coherently dedispersed bursts detected using the Arecibo and Green Bank telescopes. These bursts reveal complex time–frequency structures that include subbursts with finite bandwidths. The frequency-dependent burst structure complicates the determination of a dispersion measure (DM); we argue that it is appropriate to use a DM metric that maximizes frequency-averaged pulse structure, as opposed to peak signal-to-noise, and find DM = 560.57 ± 0.07 pc cm−3 at MJD 57,644. After correcting for dispersive delay, we find that the subbursts have characteristic frequencies that typically drift lower at later times in the total burst envelope. In the 1.1–1.7 GHz band, the ∼0.5–1 ms subbursts have typical bandwidths ranging from 100 to 400 MHz, and a characteristic drift rate of ∼200 MHz ms−1 toward lower frequencies. At higher radio frequencies, the subburst bandwidths and drift rate are larger, on average. While these features could be intrinsic to the burst emission mechanism, they could also be imparted by propagation effects in the medium local to the source. Comparison of the burst DMs with previous values in the literature suggests an increase of ΔDM ∼ 1–3 pc cm−3 in 4 yr; though, this could be a stochastic variation as opposed to a secular trend. This implies changes in the local medium or an additional source of frequency-dependent delay. Overall, the results are consistent with previously proposed scenarios in which FRB 121102 is embedded in a dense nebula." @default.
- W3100835325 created "2020-11-23" @default.
- W3100835325 creator A5003586046 @default.
- W3100835325 creator A5004827872 @default.
- W3100835325 creator A5007139394 @default.
- W3100835325 creator A5007820081 @default.
- W3100835325 creator A5008513262 @default.
- W3100835325 creator A5009559976 @default.
- W3100835325 creator A5012044437 @default.
- W3100835325 creator A5017251529 @default.
- W3100835325 creator A5023309913 @default.
- W3100835325 creator A5030668506 @default.
- W3100835325 creator A5030889135 @default.
- W3100835325 creator A5035686016 @default.
- W3100835325 creator A5038608578 @default.
- W3100835325 creator A5040720897 @default.
- W3100835325 creator A5044442833 @default.
- W3100835325 creator A5048032017 @default.
- W3100835325 creator A5049124245 @default.
- W3100835325 creator A5056398451 @default.
- W3100835325 creator A5062386564 @default.
- W3100835325 creator A5065846192 @default.
- W3100835325 creator A5067990561 @default.
- W3100835325 creator A5069227312 @default.
- W3100835325 creator A5070168453 @default.
- W3100835325 creator A5073029565 @default.
- W3100835325 creator A5074127063 @default.
- W3100835325 creator A5084993958 @default.
- W3100835325 date "2019-05-06" @default.
- W3100835325 modified "2023-10-15" @default.
- W3100835325 title "FRB 121102 Bursts Show Complex Time–Frequency Structure" @default.
- W3100835325 cites W1494949378 @default.
- W3100835325 cites W1601277342 @default.
- W3100835325 cites W1866141636 @default.
- W3100835325 cites W1977051691 @default.
- W3100835325 cites W1978610691 @default.
- W3100835325 cites W1988249855 @default.
- W3100835325 cites W2009710261 @default.
- W3100835325 cites W2010145272 @default.
- W3100835325 cites W2033747300 @default.
- W3100835325 cites W2036423640 @default.
- W3100835325 cites W2041648056 @default.
- W3100835325 cites W2053898561 @default.
- W3100835325 cites W2058372014 @default.
- W3100835325 cites W2066255956 @default.
- W3100835325 cites W2094827379 @default.
- W3100835325 cites W2103416711 @default.
- W3100835325 cites W2109606373 @default.
- W3100835325 cites W2112240717 @default.
- W3100835325 cites W2121795427 @default.
- W3100835325 cites W2133434171 @default.
- W3100835325 cites W2137533160 @default.
- W3100835325 cites W2150520267 @default.
- W3100835325 cites W2164948292 @default.
- W3100835325 cites W2168519000 @default.
- W3100835325 cites W2175329192 @default.
- W3100835325 cites W2183620482 @default.
- W3100835325 cites W2280104906 @default.
- W3100835325 cites W2289905436 @default.
- W3100835325 cites W2296660619 @default.
- W3100835325 cites W2318413100 @default.
- W3100835325 cites W2323094335 @default.
- W3100835325 cites W2339337014 @default.
- W3100835325 cites W2414784202 @default.
- W3100835325 cites W2477909332 @default.
- W3100835325 cites W2543881786 @default.
- W3100835325 cites W2549141572 @default.
- W3100835325 cites W2563744641 @default.
- W3100835325 cites W2570838639 @default.
- W3100835325 cites W2571196594 @default.
- W3100835325 cites W2577231583 @default.
- W3100835325 cites W2577895011 @default.
- W3100835325 cites W2617164508 @default.
- W3100835325 cites W2748817959 @default.
- W3100835325 cites W2759384914 @default.
- W3100835325 cites W2765830426 @default.
- W3100835325 cites W2766521544 @default.
- W3100835325 cites W2782993241 @default.
- W3100835325 cites W2789388218 @default.
- W3100835325 cites W2794558609 @default.
- W3100835325 cites W2795760988 @default.
- W3100835325 cites W2797460355 @default.
- W3100835325 cites W2799041395 @default.
- W3100835325 cites W2804864222 @default.
- W3100835325 cites W2807806341 @default.
- W3100835325 cites W2817020005 @default.
- W3100835325 cites W2896617055 @default.
- W3100835325 cites W3099051975 @default.
- W3100835325 cites W3099564634 @default.
- W3100835325 cites W3099983421 @default.
- W3100835325 cites W3100128280 @default.
- W3100835325 cites W3100453682 @default.
- W3100835325 cites W3100513703 @default.
- W3100835325 cites W3100675445 @default.
- W3100835325 cites W3101745821 @default.
- W3100835325 cites W3101838027 @default.
- W3100835325 cites W3101879206 @default.
- W3100835325 cites W3102014955 @default.