I am subscribed to a feed from arxiv (export.arxiv.org/rss/astro-ph). Every so often an article is posted with a title that includes an inequality with the letter z, e.g. “7<z<9”. For example this article: arxiv.org/abs/2002.02968, whose entry I paste below.
In Newsblur in the browser and on the iphone the title is cut off starting with the “<z”. In the browser, the body text of the article becomes a giant link.
Example problem article:
The rss entry for the problem article is:
<item rdf:about="http://arxiv.org/abs/2002.02968"> <title> Interpreting the Spitzer/IRAC Colours of 7<z<9 Galaxies: Distinguishing Between Line Emission and Starlight Using ALMA. (arXiv:2002.02968v1 [astro-ph.GA]) </title> <link>http://arxiv.org/abs/2002.02968</link> <description rdf:parseType="Literal"> <p>Prior to the launch of JWST, Spitzer/IRAC photometry offers the only means of studying the rest-frame optical properties of z>7 galaxies. Many such high redshift galaxies display a red [3.6] - [4.5] micron colour, often referred to as the "IRAC excess", which has conventionally been interpreted as arising from intense [OIII]+Hbeta emission within the [4.5] micron bandpass. An appealing aspect of this interpretation is similarly intense line emission seen in star-forming galaxies at lower redshift as well as the redshift-dependent behaviour of the IRAC colours beyond z~7 modelled as the various nebular lines move through the two bandpasses. In this paper we demonstrate that, given the photometric uncertainties, established stellar populations with Balmer (4000 A, rest-frame) breaks, such as those inferred at z>9 where line emission does not contaminate the IRAC bands, can equally well explain the redshift-dependent behaviour of the IRAC colours in 7<z<9 galaxies. We discuss possible ways of distinguishing between the two hypotheses using ALMA measures of [OIII] 88 micron and dust continuum fluxes. Prior to further studies with JWST, we show that the distinction is important in determining the assembly history of galaxies in the first 500 Myr. </p> </description> <dc:creator> <a href="http://arxiv.org/find/astro-ph/1/au:+Roberts_Borsani_G/0/1/0/all/0/1">Guido Roberts-Borsani</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ellis_R/0/1/0/all/0/1">Richard S. Ellis</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Laporte_N/0/1/0/all/0/1">Nicolas Laporte</a> </dc:creator> </item>