Alejandro Lumbreras-Calle
@alumbrerasc.bsky.social
PhD in Astrophysics. UCM, IAC, and now a postdoc at CEFCA (Teruel, Spain). Star-forming galaxies and galaxy evolution.
Pinned
Remember the mysterious oxygen nebula discovered near the Andromeda galaxy #M31?
Today we try to decipher it! It's ✨Paper Day✨
arxiv.org/abs/2412.08327
With spectra from GTC (the largest 🔭) and OAJ large narrowband images we find the nebula is actually not related to M31!
But how?👇
#Astrophysics
Today we try to decipher it! It's ✨Paper Day✨
arxiv.org/abs/2412.08327
With spectra from GTC (the largest 🔭) and OAJ large narrowband images we find the nebula is actually not related to M31!
But how?👇
#Astrophysics
You heard it here first!
We already showed last December that this nebula was in the Milky Way, not in Andromeda. Here is the paper:
🔭 arxiv.org/abs/2412.08327
With the @gtctelescope.bsky.social we measured the speed of the nebula, and found that it was much too slow to be related to Andromeda
We already showed last December that this nebula was in the Milky Way, not in Andromeda. Here is the paper:
🔭 arxiv.org/abs/2412.08327
With the @gtctelescope.bsky.social we measured the speed of the nebula, and found that it was much too slow to be related to Andromeda
August 4, 2025 at 1:34 PM
You heard it here first!
We already showed last December that this nebula was in the Milky Way, not in Andromeda. Here is the paper:
🔭 arxiv.org/abs/2412.08327
With the @gtctelescope.bsky.social we measured the speed of the nebula, and found that it was much too slow to be related to Andromeda
We already showed last December that this nebula was in the Milky Way, not in Andromeda. Here is the paper:
🔭 arxiv.org/abs/2412.08327
With the @gtctelescope.bsky.social we measured the speed of the nebula, and found that it was much too slow to be related to Andromeda
Reposted by Alejandro Lumbreras-Calle
Last week we submitted the revised version of a paper led by @alumbrerasc.bsky.social with our data and analysis of this nebula, somewhat in conflict with the conclusions of Ogle et al. 😅
August 4, 2025 at 8:34 AM
Last week we submitted the revised version of a paper led by @alumbrerasc.bsky.social with our data and analysis of this nebula, somewhat in conflict with the conclusions of Ogle et al. 😅
We've been following 3I/ATLAS from @cefca-oaj.bsky.social in Spain (Teruel)!
This is just the 3rd interstellar object that we see enter the Solar System.
I created this video with the observations🔭 we have made: you can see the comet moving through the field of stars.
We hope to get more data!
This is just the 3rd interstellar object that we see enter the Solar System.
I created this video with the observations🔭 we have made: you can see the comet moving through the field of stars.
We hope to get more data!
July 22, 2025 at 6:23 PM
We've been following 3I/ATLAS from @cefca-oaj.bsky.social in Spain (Teruel)!
This is just the 3rd interstellar object that we see enter the Solar System.
I created this video with the observations🔭 we have made: you can see the comet moving through the field of stars.
We hope to get more data!
This is just the 3rd interstellar object that we see enter the Solar System.
I created this video with the observations🔭 we have made: you can see the comet moving through the field of stars.
We hope to get more data!
Reposted by Alejandro Lumbreras-Calle
🔭Researchers from @CEFCA_OAJ have followed the footsteps of the Lyman photons to CRETA.
There, a conference on Lyalpha emitters was held, organised by the @IAstroPt ✨
Juan Antonio Fernández Ontiveros, Alejandro Lumbreras, Rahna Payyasseri Thanduparackal and Stefano Zarattini🤳
CONGRATS!!!
There, a conference on Lyalpha emitters was held, organised by the @IAstroPt ✨
Juan Antonio Fernández Ontiveros, Alejandro Lumbreras, Rahna Payyasseri Thanduparackal and Stefano Zarattini🤳
CONGRATS!!!
April 14, 2025 at 10:09 AM
🔭Researchers from @CEFCA_OAJ have followed the footsteps of the Lyman photons to CRETA.
There, a conference on Lyalpha emitters was held, organised by the @IAstroPt ✨
Juan Antonio Fernández Ontiveros, Alejandro Lumbreras, Rahna Payyasseri Thanduparackal and Stefano Zarattini🤳
CONGRATS!!!
There, a conference on Lyalpha emitters was held, organised by the @IAstroPt ✨
Juan Antonio Fernández Ontiveros, Alejandro Lumbreras, Rahna Payyasseri Thanduparackal and Stefano Zarattini🤳
CONGRATS!!!
Hasta el Torico ha mirado al #EclipseSolar hoy en Teruel!
Even the statue of the Torico (little bull) was looking at the #solareclipse2025 today in Teruel (Spain)!
Even the statue of the Torico (little bull) was looking at the #solareclipse2025 today in Teruel (Spain)!
March 29, 2025 at 3:22 PM
Hasta el Torico ha mirado al #EclipseSolar hoy en Teruel!
Even the statue of the Torico (little bull) was looking at the #solareclipse2025 today in Teruel (Spain)!
Even the statue of the Torico (little bull) was looking at the #solareclipse2025 today in Teruel (Spain)!
Reposted by Alejandro Lumbreras-Calle
⚠️ A warning to my fellow astronomers🧪🔭: there seems to be a potentially systematic issue in ApJ introducing errors in citations in the production stage of papers, so if you have a current paper with them, check your proofs *very* carefully. ⚠️
February 4, 2025 at 9:19 PM
⚠️ A warning to my fellow astronomers🧪🔭: there seems to be a potentially systematic issue in ApJ introducing errors in citations in the production stage of papers, so if you have a current paper with them, check your proofs *very* carefully. ⚠️
Reposted by Alejandro Lumbreras-Calle
An interesting occultation by PHA 2024YR4 on Feb 6 of a bright 11-mag star. The uncertainty is large and the occultation partial because of the diffraction but if we line up hundreds @unistellar.bsky.social telescopes along the path of uncertainty we will catch it, so refine its orbit. #needfunding
February 1, 2025 at 2:05 AM
An interesting occultation by PHA 2024YR4 on Feb 6 of a bright 11-mag star. The uncertainty is large and the occultation partial because of the diffraction but if we line up hundreds @unistellar.bsky.social telescopes along the path of uncertainty we will catch it, so refine its orbit. #needfunding
Reposted by Alejandro Lumbreras-Calle
Between 2019 and 2023, researchers paid $8.968 billion to make papers open access. Imagine what else could be done with this money if it wasnt paid to for profit publishing companies...
👉 arxiv.org/abs/2407.16551
👉 arxiv.org/abs/2407.16551
January 27, 2025 at 12:33 AM
Between 2019 and 2023, researchers paid $8.968 billion to make papers open access. Imagine what else could be done with this money if it wasnt paid to for profit publishing companies...
👉 arxiv.org/abs/2407.16551
👉 arxiv.org/abs/2407.16551
Charla muy interesante de Enrique Pérez-Montero (@iaacsic.bsky.social) ayer en @www.unizar.es (en Teruel) sobre la sonificación de datos astronómicos.
Muchos datos que mostramos como imágenes son adaptaciones para entenderlos mejor, y también se pueden traducir a sonidos y ser útil para todos.
Muchos datos que mostramos como imágenes son adaptaciones para entenderlos mejor, y también se pueden traducir a sonidos y ser útil para todos.
January 16, 2025 at 11:31 AM
Charla muy interesante de Enrique Pérez-Montero (@iaacsic.bsky.social) ayer en @www.unizar.es (en Teruel) sobre la sonificación de datos astronómicos.
Muchos datos que mostramos como imágenes son adaptaciones para entenderlos mejor, y también se pueden traducir a sonidos y ser útil para todos.
Muchos datos que mostramos como imágenes son adaptaciones para entenderlos mejor, y también se pueden traducir a sonidos y ser útil para todos.
En @pcoffeebreak.bsky.social comentaron mi paper sobre la misteriosa nebulosa "cerca" de la galaxia de Andrómeda!🔭 Qué ilusión! 🎉
¿Dónde está realmente? ¿Cómo la analizamos? ¿Qué es exactamente?Aquí @darksapiens.bsky.social, coautor del paper, cuenta lo que sabemos:
www.youtube.com/live/YXvicot...
¿Dónde está realmente? ¿Cómo la analizamos? ¿Qué es exactamente?Aquí @darksapiens.bsky.social, coautor del paper, cuenta lo que sabemos:
www.youtube.com/live/YXvicot...
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January 13, 2025 at 10:20 PM
En @pcoffeebreak.bsky.social comentaron mi paper sobre la misteriosa nebulosa "cerca" de la galaxia de Andrómeda!🔭 Qué ilusión! 🎉
¿Dónde está realmente? ¿Cómo la analizamos? ¿Qué es exactamente?Aquí @darksapiens.bsky.social, coautor del paper, cuenta lo que sabemos:
www.youtube.com/live/YXvicot...
¿Dónde está realmente? ¿Cómo la analizamos? ¿Qué es exactamente?Aquí @darksapiens.bsky.social, coautor del paper, cuenta lo que sabemos:
www.youtube.com/live/YXvicot...
Remember the mysterious oxygen nebula discovered near the Andromeda galaxy #M31?
Today we try to decipher it! It's ✨Paper Day✨
arxiv.org/abs/2412.08327
With spectra from GTC (the largest 🔭) and OAJ large narrowband images we find the nebula is actually not related to M31!
But how?👇
#Astrophysics
Today we try to decipher it! It's ✨Paper Day✨
arxiv.org/abs/2412.08327
With spectra from GTC (the largest 🔭) and OAJ large narrowband images we find the nebula is actually not related to M31!
But how?👇
#Astrophysics
December 12, 2024 at 5:06 PM
Remember the mysterious oxygen nebula discovered near the Andromeda galaxy #M31?
Today we try to decipher it! It's ✨Paper Day✨
arxiv.org/abs/2412.08327
With spectra from GTC (the largest 🔭) and OAJ large narrowband images we find the nebula is actually not related to M31!
But how?👇
#Astrophysics
Today we try to decipher it! It's ✨Paper Day✨
arxiv.org/abs/2412.08327
With spectra from GTC (the largest 🔭) and OAJ large narrowband images we find the nebula is actually not related to M31!
But how?👇
#Astrophysics
Reposted by Alejandro Lumbreras-Calle
Remember the big [O III] nebula discovered near the Andromeda galaxy? @alumbrerasc.bsky.social got imaging with T80Cam @ OAJ and spectroscopy with MEGARA @ GTC and it doesn't look extragalactic to us! 🔭
arxiv.org/abs/2412.08327
arxiv.org/abs/2412.08327
Andromeda's tenuous veil: extensive nebular emission near (yet far from) M31. A. Lumbreras-Calle et. al. https://arxiv.org/abs/2412.08327
December 12, 2024 at 10:43 AM
Remember the big [O III] nebula discovered near the Andromeda galaxy? @alumbrerasc.bsky.social got imaging with T80Cam @ OAJ and spectroscopy with MEGARA @ GTC and it doesn't look extragalactic to us! 🔭
arxiv.org/abs/2412.08327
arxiv.org/abs/2412.08327
The most detailed imaging survey of the Universe is available now! 🔭
J-PAS has presented its first public data release. It has 800 000 objects observed with 54 narrowband filters!
J-PAS has presented its first public data release. It has 800 000 objects observed with 54 narrowband filters!
November 21, 2024 at 8:34 PM
The most detailed imaging survey of the Universe is available now! 🔭
J-PAS has presented its first public data release. It has 800 000 objects observed with 54 narrowband filters!
J-PAS has presented its first public data release. It has 800 000 objects observed with 54 narrowband filters!
Reposted by Alejandro Lumbreras-Calle
Centro de Estudios de Física del Cosmos de Aragón
First public data from international J-PAS project
www.cefca.es
November 20, 2024 at 1:23 PM
Despite @darksapiens.bsky.social best efforts to shake me up, I calmly gave a talk at the J-PAS annual conference... until the two minute warning came and I panicked mid-sentence "... the emission line H-aaAAAAAAAlpha!"
November 19, 2024 at 11:12 AM
Despite @darksapiens.bsky.social best efforts to shake me up, I calmly gave a talk at the J-PAS annual conference... until the two minute warning came and I panicked mid-sentence "... the emission line H-aaAAAAAAAlpha!"
Back to work after the summer break, back to trying to finish some papers! 📝
Also back to preparing observing proposals. Hopefully getting IFU spectra on galaxies similar to this one: blue, extremely star-forming, and analogous to the very high redshift ones.
Also back to preparing observing proposals. Hopefully getting IFU spectra on galaxies similar to this one: blue, extremely star-forming, and analogous to the very high redshift ones.
September 4, 2024 at 6:58 PM
Back to work after the summer break, back to trying to finish some papers! 📝
Also back to preparing observing proposals. Hopefully getting IFU spectra on galaxies similar to this one: blue, extremely star-forming, and analogous to the very high redshift ones.
Also back to preparing observing proposals. Hopefully getting IFU spectra on galaxies similar to this one: blue, extremely star-forming, and analogous to the very high redshift ones.
Hi! I am starting in BlueSky taliking about another beginning:
J-PAS, the most detailed imaging survey ever has just started, observing the sky from Teruel, Spain.
With 56 filters imaging thousands of squared degrees, we will open huge new window into the Universe!
www.cefca.es/news/show/252
J-PAS, the most detailed imaging survey ever has just started, observing the sky from Teruel, Spain.
With 56 filters imaging thousands of squared degrees, we will open huge new window into the Universe!
www.cefca.es/news/show/252
October 19, 2023 at 7:16 PM
Hi! I am starting in BlueSky taliking about another beginning:
J-PAS, the most detailed imaging survey ever has just started, observing the sky from Teruel, Spain.
With 56 filters imaging thousands of squared degrees, we will open huge new window into the Universe!
www.cefca.es/news/show/252
J-PAS, the most detailed imaging survey ever has just started, observing the sky from Teruel, Spain.
With 56 filters imaging thousands of squared degrees, we will open huge new window into the Universe!
www.cefca.es/news/show/252