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Denis Erkal

@derkal.bsky.social

Astrophysicist working on dark matter, near-field cosmology, and galaxy formation. All opinions are my own. He/him.

124 Posts527 Follower255 Folgt
Denis Erkal@derkal.bsky.social · 2w ago

One week left to apply for this position on stellar streams. Happy to answer any questions so please let me know! aas.org/jobregister/...

Research Fellow in Stellar Streams | American Astronomical Society

The University of Surrey is a global community of ideas and people, dedicated to life-changing education and research.  We are ambitious and have a bold vision of what we want to achieve - shaping our...

aas.org

Denis Erkal@derkal.bsky.social · 4w ago

Interested in a 3 year postdoc working on stellar streams and dark matter? Come join our amazing Astro group in Surrey to work with me and Eugene Vasiliev. Details here and the deadline is July 30th. Let me know if you have any questions! jobs.surrey.ac.uk/vacancy.aspx... 🧪🔭☄️

Denis Erkal@derkal.bsky.social · 3w ago

And now the AAS job link: aas.org/jobregister/.... Please let me know if you have any questions about the position! 🔭☄️🧪

Research Fellow in Stellar Streams | American Astronomical Society

The University of Surrey is a global community of ideas and people, dedicated to life-changing education and research.  We are ambitious and have a bold vision of what we want to achieve - shaping our...

aas.org

Denis Erkal@derkal.bsky.social · 4w ago

Interested in a 3 year postdoc working on stellar streams and dark matter? Come join our amazing Astro group in Surrey to work with me and Eugene Vasiliev. Details here and the deadline is July 30th. Let me know if you have any questions! jobs.surrey.ac.uk/vacancy.aspx... 🧪🔭☄️

Denis Erkal@derkal.bsky.social · 4w ago

Interested in a 3 year postdoc working on stellar streams and dark matter? Come join our amazing Astro group in Surrey to work with me and Eugene Vasiliev. Details here and the deadline is July 30th. Let me know if you have any questions! jobs.surrey.ac.uk/vacancy.aspx... 🧪🔭☄️

Job Vacancy at the University of Surrey: Research Fellow in Stellar Streams

The University of Surrey is a global community of ideas and people, dedicated to life-changing education and research. We are ambitious and have a bold vision of what we want to achieve - shaping ours...

jobs.surrey.ac.uk

Denis Erkal@derkal.bsky.social · last mo.

Interested in working on stellar streams in the UK? I’ll be posting a 3 year postdoc position to work with me and Eugene Vasiliev on measuring dark matter subhalo properties with streams in a few days. Interviews will be in early August with a start date of October 1st. 🧪☄️

Denis Erkal@derkal.bsky.social · 2mo ago

The Arrakihs mission has been adopted as ESA's next F-class mission, with an expected launch in 2030! It will look at the low surface brightness outskirts of 80 Milky Way-like galaxies. www.esa.int/Science_Expl...

ESA adopts galactic archaeology mission Arrakihs

The European Space Agency’s (ESA) Science Programme Committee has adopted the Arrakihs mission. Planned for launch by the end of 2030, Arrakihs will capture the faint light from nearby galaxy haloes. ...

esa.int

Laura Lopez@ohdearz.bsky.social · 9mo ago

Honored to receive the 2026 American Physical Society Edward A. Bouchet Award! To see how the DEI ban in Ohio influences our university, please see the OSU announcement of the award (left) vs the actual APS citation for the award (right).

Lopez receives physics award Laura Lopez, a professor in the Department of Astronomy, is the recipient of the 2026 Edward A. Bouchet Award from the American Physical Society. The award honors Lopez’s pioneering contributions to X-ray astronomy, as well as her transformative leadership of mentoring programs for undergraduates, graduate students and postdocs.Laura A. Lopez, The Ohio State University 2026 recipient, Edward A. Bouchet Award For pioneering contributions to X-ray astronomy, including foundational studies of supernova remnants, compact objects, and stellar feedback in galaxies, and for transformative leadership in advancing equity and inclusion in physics through innovative mentorship programs, national advocacy, and unwavering support for students from historically marginalized communities.
NSF–DOE Rubin Observatory@vrubinobs.bsky.social · 9mo ago

We come with receipts🧾 Tidal tails are cosmic “receipts” of galactic drama, showing who collided with whom. Rubin's camera is sharp enough to catch wind of even the faintest intergalactic tea. No need to worry about "pics or it didn't happen" with Rubin keeping a close eye 😎 🔭🧪

A sprawling field of galaxies fills the deep black of space, dotted with glowing stars and colorful smudges of light. Near the top, a smooth golden elliptical galaxy glows like polished stone, linked by delicate, taffy-like streams of stars to nearby galaxies below—evidence of ancient cosmic collisions.
Marcel S. Pawlowski@8minutesold.bsky.social · 10mo ago

Paper day! My PhD student Mariana Júlio, with @readdark.bsky.social, @pengfeili.bsky.social and others, studies the internal dynamics of dwarf galaxies and finds they don't agree with the Radial Acceleration Relation, challenging the dark matter alternative MOND. arxiv.org/abs/2510.06905 🔭☄️🧪 1/7

The radial acceleration relation at the EDGE of galaxy formation: testing its universality in low-mass dwarf galaxies

A tight correlation between the baryonic and observed acceleration of galaxies has been reported over a wide range of mass ($10^8 < M_{\rm bar}/{\rm M}_\odot < 10^{11}$) - the Radial Acceleration Rela...

arxiv.org

Denis Erkal@derkal.bsky.social · 10mo ago

4MOST’s social media account is live! First light expected on October 21st! (1pm UK time) 🔭🧪

4-meter Multi-Object Spectroscopic Telescope (4MOST)@4most-eu.bsky.social · 11mo ago

Welcome to the official 4-metre Multi-Object Spectroscopic Telescope (4MOST) Bluesky account! Stay tuned for our first-light events coming very soon, and updates on all of the amazing science we will be completing over the years to come! 📷: Y. Beletsky/ESO #4most #ESO #telescope #astronomy

Michael Merrifield@astromikemerri.bsky.social · 11mo ago

Let us name those who should take responsibility for this situation. The senior management of universities failed to negotiate a sustainable system of funding, and then sleep-walked into mess. But will they be held accountable? Of course not. www.theguardian.com/education/20...

Quarter of UK university physics departments at risk of closing, survey finds

Four out of five making staff cuts as physicists say findings are ‘great concern’ for UK’s leadership in important areas

theguardian.com

Denis Erkal@derkal.bsky.social · 12mo ago

Here’s the Cygnus loop with a Seestar S50. It’s so big that one mosaic won’t fit it so I stitched two of them together. The total exposure is about 4 hours. It would be cool to go even wider and deeper. 🔭

Picture of the Cygnus loop showing lots of stars and thin clouds of gas which came from a supernova explosion
Stephen Green@stephenrgreen.bsky.social · 12mo ago

Stranded in Italy thanks to Air Canada. They say by email that they can't find any flights in the next three days and offer a refund -- ignoring EU 261/2004 regulations that they have to rebook on *any* airline. They do not answer the phone. AC has absolute contempt for its customers and employees.

Denis Erkal@derkal.bsky.social · last yr.

Anyone else notice any weird unit issues with Google lately? (3e19 m)/(1 kpc) gives 55.7 instead of ~1. Not good if you like using Google for quick unit conversions 🔭

Screen shot of a Google search showing (3e19 m)/(1 kpc) gives 55.7
Paul McMillan@mcmillan-astro.bsky.social · last yr.

Non-hot take: The "AI will kill us" discourse was a distraction from the real problem: it removes the young end of the skilled knowledge workforce. They are harder to train, because AI can do it for them. They can't get jobs, because AI can do it for their bosses. www.theguardian.com/business/202...

Number of new UK entry-level jobs has dived since ChatGPT launch – research

Vacancies for graduate jobs, apprenticeships, internships and junior jobs with no degree requirement have dropped 32%, Adzuna finds

theguardian.com

Denis Erkal@derkal.bsky.social · last yr.

Considering a senior UK fellowship (ERF, URF)? We have a great group at Surrey and our internal deadline for the ERF is July 8th. We are looking for a light-touch application: CV and 1 page research statement. I'm the contact person, so send questions/material to me www.ukri.org/what-we-do/d... 🔭

Ernest Rutherford Fellowships

Ernest Rutherford Fellowships (ERF) enables early career researchers with clear leadership potential to establish a strong, independent research programme. They encourage talented researchers in UK un...

ukri.org

Denis Erkal@derkal.bsky.social · last yr.

Really good set of slides about how Nazi scientists did very little to combat the Nazi party

Chanda Prescod-Weinstein 🌌@chanda.blacksky.app · 2y ago

In light of this deeply illegal activity at NSF and the ongoing attack on American science, I'm posting the slides from my 2017 talk at the American Physical Society about the Nazi take over of German physics/why German is no longer science's lingua franca 🧪 🧵 1/26 drive.google.com/file/d/1_MCm...