It’s Friday and I thought I’d take the opportunity before the weekend to announce yet another new paper at the Open Journal of Astrophysics.
The latest paper is the 46th so far in Volume 6 (2023) – just four to go for a half-century – and it’s the 111th altogether. This one was actually published on Wednesday November 29th.
The title is “Optimization and Quality Assessment of Baryon Pasting for Intracluster Gas using the Borg Cube Simulation” and it presents an algorithm for adding baryons to gravity-only simulations via a “pasting” approach. It is in the folder marked Cosmology and Nongalactic Astrophysics.
There are 8 authors: F. Kéruzoré; L. Bleem; M. Buehlmann; J.D. Emberson; N. Frontiere; S. Habib; K. Heitmann; and P. Larsen; all of them based at the Argonne National Laboratory, in Illinois (USA).
Here is the overlay of the paper containing the abstract:
You can click on the image of the overlay to make it larger should you wish to do so. You can find the officially accepted version of the paper on the arXiv here.
It’s Friday afternoon but before I collapse, exhausted, into the arms of the weekend I’ll take the opportunity to announce yet another new paper at the Open Journal of Astrophysics.
The latest paper is the 45th so far in Volume 6 (2023) – just five to go for a half-century – and it’s the 110th altogether. This one was actually published on Tuesday November 14th.
The title is “Marginalised Normal Regression: Unbiased curve fitting in the presence of x-errors” and it’s by Deaglan J. Bartlett (Institut d’Astrophysique de Paris, France) and Harry Desmond (Portsmouth, UK). It sounds like a statistical methods paper, and indeed it is, but remember that there’s a very long historical connection between astronomy and the development of statistical methods for data analysis, and this paper tackles a very longstanding issue: how best to fit curves in the presence of noisy data. This paper presents a new method for doing this, together with applications to cosmological and astrophysical data, and accompanying software. It is in the folder marked Instrumentation and Methods for Astrophysics.
Here is the overlay of the paper containing the abstract:
You can click on the image of the overlay to make it larger should you wish to do so. You can find the officially accepted version of the paper on the arXiv here.
It’s been a busy week generally, and specifically at the Open Journal of Astrophysics. In fact, this week we have published three papers, which I didn’t have time to post here at the time we published them but now present to you. These take the count in Volume 6 (2023) up to 44 and the total published by OJAp up to 109. With many more in the pipeline we’re still on for 50 by the end of the year.
In chronological order, the three papers published this week, with their overlays, are as follows. You can click on the images of the overlays to make them larger should you wish to do so. All three of these papers are in the folder Cosmology and Nongalactic Astrophysics.
First one up is “On the degeneracies between baryons, massive neutrinos and f(R) gravity in Stage IV cosmic shear analyses” by Alessio Spurio Mancini (Mullard Space Sciences Laboratory, University College London, UK) and Benjamin Bose (Royal Observatory Edinburgh, UK). This presents a fast nonlinear matter power spectrum emulator for f(R) gravity with massive neutrinos, coupled with a baryon feedback emulator forecasts for a cosmic shear experiment with typical Stage IV specifications. This paper was published on 6th November 2023.
Here is a screen grab of the overlay, which includes the abstract:
You can find the officially accepted version of the paper on the arXiv here.
The second paper to announce is “” by Marika Asgari (Hull, UK), Alexander Mead (Bochum, Germany) and Catherine Heymans (Edinburgh, UK). This presents a thorough discussion of the popular halo model for cosmological structure with applications, accompanied by the release of a software suite called pyhalomodel (which you can download here). The paper was also published on 7th November 2023 and you can see the overlay here:
The accepted version of this paper can be found on the arXiv here.
The last paper of this batch is entitled “Dissecting the Thermal SZ Power Spectrum by Halo Mass and Redshift in SPT-SZ Data and Simulations” and the authors are: by Josemanuel Hernandez (Chicago), Lindsey Bleem (Chicago) , Thomas Crawford (Chicago), Nicholas Huang (Berkeley), Yuuki Omori (Chicago), Srinivasan Raghunathan (NCSA, Urbana) & Christian Reichardt (Melbourne). This paper, a study of the mass and redshift dependence of the thermal Sunyaev-Zeldovich effect in South Pole Telescope data and a comparison thereof with theoretical calculations, was published on 9th November 2023.
Here is the overlay:
You can find the full text for this one on the arXiv here.
It’s Sunday but I’ll be a bit busy next week so I’m taking the opportunity today to announce yet another new paper at the Open Journal of Astrophysics. This one was published on Friday 20th October.
The primary classification for this paper is Cosmology and NonGalactic Astrophysics and its title is “DES Y3 + KiDS-1000: Consistent cosmology combining cosmic shear surveys”. The article presents a joint analysis of the Dark Energy Survey Year 3 data and the Kilo-Degree Survey data, with a discussion of the implications for cosmological parameters. The key figure – a very important one – is this:
If you want to know more about the result and why it is so important you could read the paper. It is, however, rather long: 40 pages including 21 figures and 15 tables. Do not despair, though, because here is a video explaining the work in the series of Cosmology Talks presented by Shaun Hotchkiss:
Anyway, here is the overlay of the paper containing the abstract:
You can click on the image of the overlay to make it larger should you wish to do so. You can find the officially accepted version of the paper on the arXiv here.
It’s Friday so it’s a good time to catch up with the week’s action at the Open Journal of Astrophysics, where there have been two new publications so far this week. These papers take us up to a total of 40 in Volume 6 (2023) and 105 in total since we started publishing.
The title of the first paper is “Halo Properties from Observable Measures of Environment: I. Halo and Subhalo Masses” and its primary classification is Astrophysics of Galaxies. it is an exploration using neural networks of how the peak masses of dark matter halos and subhaloes correlate with observationally-accessible measures of their dependence on environment.
The authors based in the United States of America: Haley Bowden and Peter Behroozi of the University of Arizona, and Andrew Hearin of the Argonne National Laboratory
Here is a screen grab of the overlay which includes the abstract:
You can click on the image of the overlay to make it larger should you wish to do so. You can find the officially accepted version of the paper on the arXiv here.
The second paper was published on 18th October 2023. The primary classification for this one is Cosmology and Nongalactic Astrophysics and is “Mitigating the noise of DESI mocks using analytic control variates”. For those of you not up with the lingo, DESI stands for the Dark Energy Spectroscopic Instrument and you can read more about it here.
The lead author for this one is Boryana Hadzhiyska of the Lawrence Berkeley Laboratory and the University of California, Berkeley (USA) and there are 32 other authors. This paper presents a method for reducing the effects of sample variance on cosmological simulations using analytical approximations and tests it using DESI data.
Here is a screen grab of the overlay which includes the abstract:
You can click on the image of the overlay to make it larger should you wish to do so. You can find the officially accepted version of the paper on the arXiv here.
Quite a few people have contacted me to ask about the Peer Review Process at the Open Journal of Astrophysics so I thought I’d do a quick post here to explain a bit about it here.
When a paper is submitted it is up to the Editor-in-Chief – that’s me! – to assign it to a member of the Editorial Board. Who that is depends on the topic of the paper and on the current availability due to workload. I of course take on some papers myself. I also reject some papers without further Peer Review if they clearer don’t meet the journal’s criteria of scientific quality, originality, relevance and comprehensibility. I usually run such papers past the Editorial Board before doing such a ‘Desk Reject’.
Once the paper has been assigned, the Editor takes control of the process, inviting referees (usually two) to comment and make recommendations. This is the rate-determining step, as potential referees are often busy. It can take as many as ten declined invitations before we get a referee to agree. Once accepted, a referee is asked to provide a report within three weeks. Sometimes they are quicker than that, sometimes they take longer. It depends on many factors, including the length of the manuscript.
Once all the referee reports are in the Editor can make a decision. Some papers are rejected upon refereeing, and some are accepted with only tiny changes. The most frequent decision is “Revise and Resubmit” – authors are requested to make changes in response to the referee comments. Sometimes these are minor, sometimes they are substantial. We never give a deadline for resubmission.
A resubmitted paper is usually sent to the same referee(s) who reviewed the original. The referees may be satisfied and recommend acceptance, or we go around again.
Once a paper is accepted, the authors are instructed to upload the final, accepted, version to arXiv. It normally takes a day or two to be announced. The article is then passed over from the Peer Review process to the Publication process. As Managing Editor, I make the overlay and prepare the metadata for the final version. This is usually done the same day as the final version appears on arXiv, but sometimes it takes a bit longer to put everything in order. It’s never more than a few days though.
Anyway, here are some “analytics” – it’s weird how anything that includes any quantitative information is called analytics these days to make it sound more sophisticated than it actually is – provided by the Scholastica platform:
These numbers need a little explanation.
The “average days to a decision” figure includes desk rejects as well as all submissions and resubmissions. Suppose a paper is submitted and it then takes 4 weeks to get referee reports and for the Editor to make a “Revise and Resubmit” request. That would count as 28 days. It might take the authors three months to make their revisions and resubmit the paper, but that does not count in the calculation of the “average days to decision” as during that period the manuscript is deemed to be inactive. If the revised version is accepted almost immediately, say after 2 days, then the average days to decision would be (28+2)/2 = 15 days. Also, being an average there are some shorter than 14 days and some much longer.
The acceptance rate is the percentage of papers eventually accepted (even after revision). The figure for ‘total submissions’ includes resubmissions, so the hypothetical paper in the preceding paragraph would add 2 to this total. That accounts for why the total number of papers accepted is not 50% of 388, which is 194; the actual figure is lower, at 105.
Finally, the number of manuscripts “in progress” is currently 23. That includes papers currently going through the peer review process. It does not include papers which are back with the authors for revisions (although it would be reasonable to count those as in progress in some sense).
There we are. I hope this clarifies the situation.
Time to announce yet another new paper at the Open Journal of Astrophysics. This one was actually published on Friday (6th October 2023), but for one reason and another I’ve only just got around to announcing it here.
The latest paper is the 38th so far in Volume 6 (2023) and the 103rd in all. The authors are: Matthew Price, Matthijs Mars, Matthew Docherty, Alessio Spurio Mancini, Augustin Marignier and Jason McEwen – all affiliated with University College London, UK.
The primary classification for this paper is Cosmology and Nongalactic Astrophysics and its title is “Fast emulation of anisotropies induced in the cosmic microwave background by cosmic strings”. It describes a generative technique for producing generating cosmic microwave background temperature maps using wavelet phase harmonics. For an explanation of what a cosmic string is, see here. If you don’t know the difference between “emulation” and “simulation”, I refer you to the text!
Here is a screen grab of the overlay of the published version which includes the abstract:
You can click on the image of the overlay to make it larger should you wish to do so. You can find the officially accepted version of the paper on the arXiv here.
Time to announce yet another new paper at the Open Journal of Astrophysics. This one was published yesterday (27th September 2023).
The latest paper is the 37th so far in Volume 6 (2023) and the 102nd in all. The authors are Joe McCaffrey (Maynooth, Ireland), Samantha Hardin (Georgia Tech, USA), John Wise (Georgia Tech) and John Regan (Maynooth). As this one involved two authors from my own Department, I recused myself from the editorial process, although it is work I am very interested in.
The primary classification for this paper is Astrophysics of Galaxies and its title is “No Tension: JWST Galaxies at z>10 Consistent with Cosmological Simulations”. I’ve blogged about this paper before, a few months ago, when it appeared on the arXiv. The editorial process on this one has been very thorough and it has been a few rounds with the reviewers before being accepted for publication. The authors may have found this a bit irksome, but I think the process improved them paper considerably, which is what it is meant to do.
As many of you will be aware, there’s been a considerable to-do not to mention a hoo-hah about the detections by JWST of some galaxies at high redshift. Some of these have been shown not to be galaxies at high redshift after all, but some around z=10 seem to be genuine. This paper is a response to claims that these somehow rule out the standard cosmological framework.
The key figure in the current paper is this:
The solid curves show the number of galaxies of a given mass one would expect to see as a function of redshift in fields comparable to those observed with estimated values from observations (star-shaped symbols). As you can see the observed points are consistent with the predictions. There’s no tension, so you can all relax.
Anyway, here is a screen grab of the overlay of the published version which includes the abstract:
You can click on the image of the overlay to make it larger should you wish to do so. You can find the officially accepted version of the paper on the arXiv here.
Time to announce yet another new paper at the Open Journal of Astrophysics. This one is hot off the press and was published today (15th September 2023).
The latest paper is the 36th so far in Volume 6 (2023) and the 101st in all. The authors are Kareem El-Badry (Department of Astronomy, California Institute of Technology, USA), Kevin Burdge (Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, USA), Jan van Roestel (Anton Pannekoek Institute for Astronomy, University of Amsterdam,NL) & Antonio C. Rodriguez (Department of Astronomy, California Institute of Technology, USA).
The primary classification for this paper is Solar and Stellar Astrophysics and its title is “A transiting brown dwarf in a 2 hour orbit”. The article reports the discovery of a brown dwarf in a very short orbit around a low-mass star with a discussion about the evolution of this orbit probably due to magnetic braking. Amazingly, the entire binary system would fit comfortably inside the Sun (although that’s not actually where it is).
Anyway, here is a screen grab of the overlay of the published version which includes the abstract:
You can click on the image of the overlay to make it larger should you wish to do so. You can find the officially accepted version of the paper on the arXiv here.
I am happy to announce the publication of yet another new paper at the Open Journal of Astrophysics. This one is hot off the press; it was published today, 11th September 2023.
The latest paper is in fact our 100th publication. It is also the 35th in Volume 6 (2023), which means that we have now published more papers so far this year than in the previous two years put together. I’d like to thank everyone who has supported the Open Journal of Astrophysics and helped us get this far! Here’s to the next 100!
Anyway, the new paper is entitled A complete catalogue of merger fractions in AGN hosts: No evidence for an increase in detected merger fraction with AGN luminosity and it is a complete and systematic analysis of detected merger fractions in AGN hosts from the literature leading to the conclusion that there is no evidence for correlation between the two.
The primary classification for this paper is Astrophysics of Galaxies and the author is Carolin Villforth of the Department of Physics in the University of Bath. As author of our 100th paper, Carolin wins a year’s free subscription to the Open Journal of Astrophysics.
Here is a screen grab of the overlay of the published version which includes the abstract:
You can click on the image of the overlay to make it larger should you wish to do so. You can find the officially accepted version of the paper on the arXiv here.
Incidentally, you might notice a new feature on the overlay above. Just above the Abstract heading on the right and side you can see a little link saying “Download”. This allows you to download the citation to the paper in BibTex format.
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