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Posts
Future Blog Post
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Blog Post number 4
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This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.
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Blog Post number 3
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This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.
Headings are cool
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Blog Post number 2
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This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.
Headings are cool
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Aren’t headings cool?
Blog Post number 1
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This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.
Headings are cool
You can have many headings
Aren’t headings cool?
portfolio
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publications
Event Horizon and Environs (ETHER): A Curated Database for EHT and ngEHT Targets and Science
Published in Galaxies, 2023
Ramakrishnan V., Nagar N., Arratia V., Hernández-Yévenes J., Pesce D.W., Nair D.G., Bandyopadhyay B., Medina-Porcile C., Krichbaum T.P., Doeleman S., Ricarte A., Fish V.L., Blackburn L., Falcke H., Bower G., & Natarajan P.
Recommended citation: Ramakrishnan, V., et al., 2023 https://doi.org/10.3390/galaxies11010015
WISE2MBH: A scaling-based algorithm for probing supermassive black hole masses through WISE catalogues
Published in Monthly Notices of the Royal Astronomical Society, 2024
Hernández-Yévenes J., Nagar N., Arratia V., & Jarrett T.H.
Recommended citation: Hernández-Yévenes, J., et al., 2024 https://doi.org/10.1093/mnras/stae1372
Demographics of black holes at <100 Rg scales: accretion flows, jets, and shadows
Published in XVI EVNS Proceedings, 2024
Nair D.G., Nagar N.M., Ramakrishnan V., Wielgus M., Arratia V., Krichbaum T.P., Zhang X.A., Ricarte A., Silpa S., Hernández-Yévenes J., Ford N.M., Bandyopadhyay B., Gurwell M., Burridge R., Pesce D.W., Doeleman S.S., Kim J.-Y., Kim D., Janssen M., von Fellenberg S.D., Fromm C.M., Lee D., Falcke H., Wagner J., Bower G.C., Baczko A.-K., Kim D.-J., Akiyama K., Asada K., Arevalo P., Bignall H., Blackburn L., Broderick A.E., Brunthaler A., Chan C., Doi A., Fish V.L., Fomalont E., Gómez J.L., Haggard D., Hada K., Herrera-Camus R., Hoak D., Hughes D., Hlavacek-Larrondo J., Jorstad S., Johnson M.D., Kawashima T., Keating G.K., Kharb P., Koay J.Y., Koyama S., Kuo C.-Y., Leigh N.W.C., Lira P., Lindqvist M., Lobanov A.P., Lo W.-P., Lu R.-S., Markoff S., MacDonald N.R., Martínez-Aldama M.L., Matthews L.D., Matsushita S., Mezcua M., Moscibrodzka M., Müller H., Nagai H., Nakamura M., Natarajan P., Narayanan G., Nowak M.A., Olivares Sánchez H.R., Park J., Psaltis D., Pu H.-Y., Porth O., Rao R., Reynolds C., Reeves R., Romero-Cañizales C., Ros E., Rottmann H., Roy A.L., Schleicher D., Savolainen T., Impellizzeri C.M.V., Treister E., Wiik K., Zensus J.A.
Recommended citation: Nair, D.G., et al., 2024. https://doi.org/10.48550/arXiv.2412.20276
The GECKOS survey: Resolving the molecular and ionised gas in the galactic outflow of ESO 484-036
Published in arXiv (Submitted to MNRAS), 2026
Hernández-Yévenes J., Fisher D. B., Mazzilli Ciraulo B., Davies R. L., Martig M., Fraser-McKelvie A., van de Sande J., Hayden M. R., Elliot R., Emsellem E., Combes F., Bolatto A. D., Bland-Hawthorn J., Cortese L., Davis T. A., Catinella B., Valenzuela L. M., Croom S. M., Fortuné S. A., Silva-Lima L. A., López-Cobá C., Mailvaganam A., & van de Ven G.
Recommended citation: Hernández-Yévenes, J., et al., 2026 https://doi.org/10.48550/arXiv.2604.14546
Using WISE cataloged data for morphology, bulge fraction and black hole mass estimation
Published in XVII LARIM Proceedings (Revista Mexicana De Astrofísica y Astronomía Serie De Conferencias), 2026
Hernández-Yévenes J., Nagar N., Arratia V., & Jarrett T.H.
Recommended citation: Hernández-Yévenes, J., et al., 2026 https://doi.org/10.22201/ia.14052059p.2026.60.223
talks
La nueva generación del Telescopio Horizonte de Eventos (ngEHT) y Chile
Published:
Public-oriented talk to show the next-generation Event Horizon Telescope (ngEHT), it’s key science and how we are pushing and putting all our effort into that project from Chile. Available at Instagram.
Using WISE cataloged data for morphology, bulge fraction and black hole mass estimation
Published:
Scientific poster to be presented at the XVII Latin American Regional IAU Meeting presenting how to use WISE cataloged data to estimate mutliple properties of galaxies and the mass of their Supermassive Black Holes (SMBH) using the WISE2MBH algorithm. WISE2MBH is available at GitHub. If the poster doesn’t display, you can download it here.
List of references in the poster:
[1] [Cluver, M. E., Jarrett, T. H., Hopkins, A. M., Driver, S. P., et al. (2014)](http://dx.doi.org/10.1088/0004-637X/782/2/90), *Galaxy and Mass Assembly (GAMA): Mid-infrared Properties and Empirical Relations from WISE*, **ApJ**, 782, 90. [DOI: 10.1088/0004-637X/782/2/90](http://dx.doi.org/10.1088/0004-637X/782/2/90), [ADS Link](https://ui.adsabs.harvard.edu/abs/2014ApJ...782...90C) [2] [Doeleman, S. S., Barrett, J., Blackburn, L., Bouman, K. L., et al. (2023)](http://dx.doi.org/10.3390/galaxies11050107), *Reference Array and Design Consideration for the Next-Generation Event Horizon Telescope*, **Galaxies**, 11(5), 107. [DOI: 10.3390/galaxies11050107](http://dx.doi.org/10.3390/galaxies11050107), [ADS Link](https://ui.adsabs.harvard.edu/abs/2023Galax..11..107D) [3] [Gallo, E., Sesana, A. (2019)](http://dx.doi.org/10.3847/2041-8213/ab40c6), *Exploring the Local Black Hole Mass Function below 10⁶ Solar Masses*, **ApJL**, 883, L18. [DOI: 10.3847/2041-8213/ab40c6](http://dx.doi.org/10.3847/2041-8213/ab40c6), [ADS Link](https://ui.adsabs.harvard.edu/abs/2019ApJ...883L..18G) [4] [Graham, A. W. (2016)](https://link.springer.com/chapter/10.1007/978-3-319-19378-6_11), *Galaxy Bulges and Their Massive Black Holes: A Review*, in *Galactic Bulges*, Springer International Publishing, Cham, pp. 263-313. ISBN: 978-3-319-19378-6. [arXiv Link](https://arxiv.org/abs/1501.02937) [5] [Gültekin, K., King, A. L., Cackett, E. M., Nyland, K., et al. (2019)](http://dx.doi.org/10.3847/1538-4357/aaf6b9), *The Fundamental Plane of Black Hole Accretion and Its Use as a Black Hole-Mass Estimator*, **ApJ**, 871, 80. [DOI: 10.3847/1538-4357/aaf6b9](http://dx.doi.org/10.3847/1538-4357/aaf6b9), [ADS Link](https://ui.adsabs.harvard.edu/abs/2019ApJ...871...80G) [6] [Hernández-Yévenes, J., Nagar, N., Arratia, V., Jarrett, T. H. (2024)](https://joacoh.github.io/publications/2023-10-08-pub-2), *WISE2MBH: A simple algorithm for morphology, bulge fraction and black hole mass estimation using WISE catalogs*, **Submitted to MNRAS**. [Link](https://joacoh.github.io/publications/2023-10-08-pub-2) [7] [Huchra, J. P., Macri, L. M., Masters, K. L., Jarrett, T. H., et al. (2012)](http://dx.doi.org/10.1088/0067-0049/199/2/26), *The 2MASS Redshift Survey—Description and Data Release*, **ApJS**, 199(2), 26. [DOI: 10.1088/0067-0049/199/2/26](http://dx.doi.org/10.1088/0067-0049/199/2/26), [ADS Link](https://ui.adsabs.harvard.edu/abs/2012ApJS..199...26H) [8] [Inayoshi, K., Visbal, E., Haiman, Z. (2020)](http://dx.doi.org/10.1146/annurev-astro-120419-014455), *The Assembly of the First Massive Black Holes*, **ARA&A**, 58, 27-97. [DOI: 10.1146/annurev-astro-120419-014455](http://dx.doi.org/10.1146/annurev-astro-120419-014455), [ADS Link](https://ui.adsabs.harvard.edu/abs/2020ARA&A..58...27I) [9] [Jarrett, T. H., Cohen, M., Masci, F., Wright, E., et al. (2011)](http://dx.doi.org/10.1088/0004-637X/735/2/112), *The Spitzer-WISE Survey of the Ecliptic Poles*, **ApJ**, 735(2), 112. [DOI: 10.1088/0004-637X/735/2/112](http://dx.doi.org/10.1088/0004-637X/735/2/112), [ADS Link](https://ui.adsabs.harvard.edu/abs/2011ApJ...735..112J) [10] [Jarrett, T. H., Cluver, M. E., Taylor, E. N., Bellstedt, S., et al. (2023)](http://dx.doi.org/10.3847/1538-4357/acb68f), *A New Wide-field Infrared Survey Explorer Calibration of Stellar Mass*, **ApJ**, 946(2), 95. [DOI: 10.3847/1538-4357/acb68f](http://dx.doi.org/10.3847/1538-4357/acb68f), [ADS Link](https://ui.adsabs.harvard.edu/abs/2023ApJ...946...95J) [11] [Johnson, M. D., Akiyama, K., Blackburn, L., Bouman, K. L., et al. (2023)](http://dx.doi.org/10.3390/galaxies11030061), *Key Science Goals for the Next-Generation Event Horizon Telescope*, **Galaxies**, 11(3), 61. [DOI: 10.3390/galaxies11030061](http://dx.doi.org/10.3390/galaxies11030061), [Link](https://www.mdpi.com/2075-4434/11/3/61) [12] [Kong, M., Ho, L. C. (2018)](http://dx.doi.org/10.3847/1538-4357/aabe2a), *The Black Hole Masses and Eddington Ratios of Type 2 Quasars*, **ApJ**, 859(2), 116. [DOI: 10.3847/1538-4357/aabe2a](http://dx.doi.org/10.3847/1538-4357/aabe2a), [ADS Link](https://ui.adsabs.harvard.edu/abs/2018ApJ...859..116K) [13] [Kormendy, J., Ho, L. C. (2013)](http://dx.doi.org/10.1146/annurev-astro-082708-101811), *Coevolution (Or Not) of Supermassive Black Holes and Host Galaxies*, **ARA&A**, 51(1), 511-653. [DOI: 10.1146/annurev-astro-082708-101811](http://dx.doi.org/10.1146/annurev-astro-082708-101811), [ADS Link](https://ui.adsabs.harvard.edu/abs/2013ARA&A..51..511K) [14] [Mendel, J. T., Simard, L., Palmer, M., Ellison, S. L., Patton, D. R. (2014)](http://dx.doi.org/10.1088/0067-0049/210/1/3), *A Catalog of Bulge, Disk, and Total Stellar Mass Estimates for the Sloan Digital Sky Survey*, **ApJS**, 210(1), 3. [DOI: 10.1088/0067-0049/210/1/3](http://dx.doi.org/10.1088/0067-0049/210/1/3), [ADS Link](https://ui.adsabs.harvard.edu/abs/2014ApJS..210....3M) [15] [Morell, D. F., Ribeiro, A. L. B., de Carvalho, R. R., Rembold, S. B., et al. (2020)](http://dx.doi.org/10.1093/mnras/staa881), *Classification and evolution of galaxies according to the dynamical state of host clusters and galaxy luminosities*, **MNRAS**, 494(3), 3317-3327. [DOI: 10.1093/mnras/staa881](http://dx.doi.org/10.1093/mnras/staa881), [ADS Link](https://ui.adsabs.harvard.edu/abs/2020MNRAS.494.3317M) [16] [Pesce, D. W., Palumbo, D. C. M., Narayan, R., Blackburn, L., Doeleman, S. S., et al. (2021)](http://dx.doi.org/10.3847/1538-4357/ac2eb5), *Toward Determining the Number of Observable Supermassive Black Hole Shadows*, **ApJ**, 923(2), 260. [DOI: 10.3847/1538-4357/ac2eb5](http://dx.doi.org/10.3847/1538-4357/ac2eb5), [ADS Link](https://ui.adsabs.harvard.edu/abs/2021ApJ...923..260P) [17] [Quilley, L., de Lapparent, V. (2022)](http://dx.doi.org/10.1051/0004-6361/202244202), *Aging of galaxies along the morphological sequence, marked by bulge growth and disk quenching*, **A&A**, 666, A170. [DOI: 10.1051/0004-6361/202244202](http://dx.doi.org/10.1051/0004-6361/202244202), [ADS Link](https://ui.adsabs.harvard.edu/abs/2022A&A...666A.170Q) [18] [Quilley, L., de Lapparent, V. (2023)](http://dx.doi.org/10.48550/arXiv.2305.02069), *Tailoring galaxies: size-luminosity-surface brightness relations of bulges and disks along the morphological sequence*, **arXiv e-prints**, arXiv:2305.02069. [DOI: 10.48550/arXiv.2305.02069](http://dx.doi.org/10.48550/arXiv.2305.02069), [ADS Link](https://ui.adsabs.harvard.edu/abs/2023arXiv230502069Q) [19] [Ramakrishnan, V., Nagar, N., Arratia, V., Hernández-Yévenes, J., et al. (2023)](http://dx.doi.org/10.3390/galaxies11010015), *Event Horizon and Environs (ETHER): A Curated Database for EHT and ngEHT Targets and Science*, **Galaxies**, 11(1), 15. [DOI: 10.3390/galaxies11010015](http://dx.doi.org/10.3390/galaxies11010015), [Link](https://www.mdpi.com/2075-4434/11/1/15) [20] [Saglia, R. P., Opitsch, M., Erwin, P., et al. (2016)](http://dx.doi.org/10.3847/0004-637X/818/1/47), *The SINFONI Black Hole Survey: The Black Hole Fundamental Plane Revisited and the Paths of (Co)evolution of Supermassive Black Holes and Bulges*, **ApJ**, 818(1), 47. [DOI: 10.3847/0004-637X/818/1/47](http://dx.doi.org/10.3847/0004-637X/818/1/47), [ADS Link](https://ui.adsabs.harvard.edu/abs/2016ApJ...818...47S) [21] [Schutte, Z., Reines, A. E., Greene, J. E. (2019)](http://dx.doi.org/10.3847/1538-4357/ab35dd), *The Black Hole-Bulge Mass Relation Including Dwarf Galaxies Hosting Active Galactic Nuclei*, **ApJ**, 887(2), 245. [DOI: 10.3847/1538-4357/ab35dd](http://dx.doi.org/10.3847/1538-4357/ab35dd), [ADS Link](https://ui.adsabs.harvard.edu/abs/2019ApJ...887..245S) [22] [Shankar, F., Bernardi, M., Sheth, R. K., Ferrarese, L., et al. (2016)](http://dx.doi.org/10.1093/mnras/stw678), *Selection bias in dynamically measured supermassive black hole samples: its consequences and the quest for the most fundamental relation*, **MNRAS**, 460(3), 3119-3142. [DOI: 10.1093/mnras/stw678](http://dx.doi.org/10.1093/mnras/stw678), [ADS Link](https://ui.adsabs.harvard.edu/abs/2016MNRAS.460.3119S) [23] [Stern, D., Assef, R. J., Benford, D. J., Blain, A., et al. (2012)](http://dx.doi.org/10.1088/0004-637X/753/1/30), *Mid-infrared Selection of Active Galactic Nuclei with the Wide-Field Infrared Survey Explorer. I. Characterizing WISE-selected Active Galactic Nuclei in COSMOS*, **ApJ**, 753(1), 30. [DOI: 10.1088/0004-637X/753/1/30](http://dx.doi.org/10.1088/0004-637X/753/1/30), [ADS Link](https://ui.adsabs.harvard.edu/abs/2012ApJ...753...30S) [24] [Wang, F., Yang, J., Fan, X., Hennawi, J. F., et al. (2021)](http://dx.doi.org/10.3847/2041-8213/abd8c6), *A Luminous Quasar at Redshift 7.642*, **ApJL**, 907(1), L1. [DOI: 10.3847/2041-8213/abd8c6](http://dx.doi.org/10.3847/2041-8213/abd8c6), [ADS Link](https://ui.adsabs.harvard.edu/abs/2021ApJ...907L...1W) [25] [Wright, E. L., Eisenhardt, P. R. M., Mainzer, A. K., Ressler, M. E., et al. (2010)](http://dx.doi.org/10.1088/0004-6256/140/6/1868), *The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance*, **AJ**, 140(6), 1868-1881. [DOI: 10.1088/0004-6256/140/6/1868](http://dx.doi.org/10.1088/0004-6256/140/6/1868), [ADS Link](https://ui.adsabs.harvard.edu/abs/2010AJ....140.1868W) [26] [Yao, Y., Ravi, V., Gezari, S., van Velzen, S., et al. (2023)](http://dx.doi.org/10.3847/2041-8213/acf216), *Tidal Disruption Event Demographics with the Zwicky Transient Facility: Volumetric Rates, Luminosity Function, and Implications for the Local Black Hole Mass Function*, **ApJL**, 955(1), L6. [DOI: 10.3847/2041-8213/acf216](http://dx.doi.org/10.3847/2041-8213/acf216), [ADS Link](https://ui.adsabs.harvard.edu/abs/2023ApJ...955L...6Y)Statistical methods: Bootstrap, sliding‑window and statistical tests
Published:
Workshop done at the 2024 TITANs Annual Meeting presenting how to use bootstrap to test biases on data, how to use a sliding-window algorithm to search trough specific regions of data, the use of the Kolmogórov-Smirnov test applied to astronomy and the combination of all methods fo find statiscally strong results while not worrying about biases in data or sample-size problems. The notebook used for the workshop is available here.
Do SMBH mass estimates agree one to each other?
Published:
Academic talk presented at the 2024 TITANs Annual Meeting presenting the possible biases between different indirect methods to estimate the masses of SMBHs. Regions of agreement and solutions to recover agreement in specific cases are discussed. WISE2MBH is used a method to compare others to. It is available at GitHub. If the slides doesn’t display, you can download them here.
Outflows en Galaxias Edge-on: El Caso de ESO484-G036
Published:
Academic talk presented at the I Congreso Latinoamericano de Astronomía Extragaláctica (CLASTROEx) presenting how outflows are studied in edge-on galaxies, showing the example of ESO484-G036, a nearby starburst galaxy. Here I present analysis of the cold and ionised phases of the outflow using ALMA and VLT/MUSE data. This talk is in Spanish as it was intended to be understood by undergraduate students across Latinamerica. If the slides doesn’t display, you can download them here.
Talk Series: Resolving the molecular and ionised gas in the galactic outflow of ESO 484-036
Published:
Academic talk presented at multiple venues (ESO Chile, PUC, UDP and UdeC) during my visit to Chile in March 2026 talking about my first project of my PhD. In this talk I presented the results of the homonimus paper describeing the ionised and molecular phases of the outflow in the starburst galaxy ESO 484-036, all of this as part of the GECKOS collaboration. This talk endedup being my Confirmation of Candidature (CoC) talk for my PhD. The slides shared here correspond to the CoC version of the talk. All confidential information was removed from the slides.
teaching
Radioastronomía
Undergraduate course (Assistanship), Departmento de Astronomía, Universidad de Concepción, 2023
Undergraduate course about Radioastronomy and its most relevant use cases.
Astrofísica Extragaláctica
Undergraduate course (Assistanship), Departmento de Astronomía, Universidad de Concepción, 2023
Undergraduate course about Extragalactic Astrophysics and its most relevant topics across history and today.