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Euclid: A complete Einstein ring in NGC 6505

Fuente: arXiv

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Detalles Bibliográficos
Autores principales:	O'Riordan, C. M., Oldham, L. J., Nersesian, A., Li, T., Collett, T. E., Sluse, D., Altieri, B., Clément, B., C., K. Vasan G., Rhoades, S., Chen, Y., Jones, T., Adami, C., Gavazzi, R., Vegetti, S., Powell, D. M., Barroso, J. A. Acevedo, Andika, I. T., Bhatawdekar, R., Cooray, A. R., Despali, G., Diego, J. M., Ecker, L. R., Galan, A., Gómez-Alvarez, P., Leuzzi, L., Meneghetti, M., Metcalf, R. B., Schirmer, M., Serjeant, S., Tortora, C., Vaccari, M., Vernardos, G., Walmsley, M., Amara, A., Andreon, S., Auricchio, N., Aussel, H., Baccigalupi, C., Baldi, M., Balestra, A., Bardelli, S., Basset, A., Battaglia, P., Bender, R., Bonino, D., Branchini, E., Brescia, M., Brinchmann, J., Caillat, A., Camera, S., Capobianco, V., Carbone, C., Carretero, J., Casas, S., Castander, F. J., Castellano, M., Castignani, G., Cavuoti, S., Cimatti, A., Colodro-Conde, C., Congedo, G., Conselice, C. J., Conversi, L., Copin, Y., Corcione, L., Courbin, F., Courtois, H. M., Cropper, M., Da Silva, A., Degaudenzi, H., De Lucia, G., Di Giorgio, A. M., Dinis, J., Dubath, F., Duncan, C. A. J., Dupac, X., Dusini, S., Farina, M., Farrens, S., Faustini, F., Ferriol, S., Fourmanoit, N., Frailis, M., Franceschi, E., Fumana, M., Galeotta, S., Gillard, W., Gillis, B., Giocoli, C., Granett, B. R., Grazian, A., Grupp, F., Guzzo, L., Haugan, S. V. H., Hoar, J., Hoekstra, H., Holmes, W., Hook, I., Hormuth, F., Hornstrup, A., Hudelot, P., Jahnke, K., Jhabvala, M., Joachimi, B., Keihänen, E., Kermiche, S., Kiessling, A., Kilbinger, M., Kohley, R., Kubik, B., Kümmel, M., Kunz, M., Kurki-Suonio, H., Lahav, O., Laureijs, R., Mignant, D. Le, Ligori, S., Lilje, P. B., Lindholm, V., Lloro, I., Mainetti, G., Maiorano, E., Mansutti, O., Marggraf, O., Markovic, K., Martinelli, M., Martinet, N., Marulli, F., Massey, R., Medinaceli, E., Mei, S., Melchior, M., Mellier, Y., Merlin, E., Meylan, G., Moresco, M., Moscardini, L., Nakajima, R., Nichol, R. C., Niemi, S. -M., Nightingale, J. W., Padilla, C., Paltani, S., Pasian, F., Pedersen, K., Percival, W. J., Pettorino, V., Pires, S., Polenta, G., Poncet, M., Popa, L. A., Pozzetti, L., Raison, F., Rebolo, R., Renzi, A., Rhodes, J., Riccio, G., Rix, H. -W., Romelli, E., Roncarelli, M., Rossetti, E., Rusholme, B., Saglia, R., Sakr, Z., Sánchez, A. G., Sapone, D., Sartoris, B., Schneider, P., Schrabback, T., Secroun, A., Seidel, G., Serrano, S., Sirignano, C., Sirri, G., Stanco, L., Steinwagner, J., Tallada-Crespí, P., Tereno, I., Toledo-Moreo, R., Torradeflot, F., Tutusaus, I., Valenziano, L., Vassallo, T., Kleijn, G. Verdoes, Veropalumbo, A., Wang, Y., Weller, J., Zacchei, A., Zamorani, G., Zucca, E., Burigana, C., Casenove, P., Mora, A., Scottez, V., Viel, M., Jauzac, M., Dannerbauer, H.
Formato:	Preprint
Publicado:	2025
Materias:	Astrophysics of Galaxies
Acceso en línea:	Acceder al recurso
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

_version_	1866915144709177344
author	O'Riordan, C. M. Oldham, L. J. Nersesian, A. Li, T. Collett, T. E. Sluse, D. Altieri, B. Clément, B. C., K. Vasan G. Rhoades, S. Chen, Y. Jones, T. Adami, C. Gavazzi, R. Vegetti, S. Powell, D. M. Barroso, J. A. Acevedo Andika, I. T. Bhatawdekar, R. Cooray, A. R. Despali, G. Diego, J. M. Ecker, L. R. Galan, A. Gómez-Alvarez, P. Leuzzi, L. Meneghetti, M. Metcalf, R. B. Schirmer, M. Serjeant, S. Tortora, C. Vaccari, M. Vernardos, G. Walmsley, M. Amara, A. Andreon, S. Auricchio, N. Aussel, H. Baccigalupi, C. Baldi, M. Balestra, A. Bardelli, S. Basset, A. Battaglia, P. Bender, R. Bonino, D. Branchini, E. Brescia, M. Brinchmann, J. Caillat, A. Camera, S. Capobianco, V. Carbone, C. Carretero, J. Casas, S. Castander, F. J. Castellano, M. Castignani, G. Cavuoti, S. Cimatti, A. Colodro-Conde, C. Congedo, G. Conselice, C. J. Conversi, L. Copin, Y. Corcione, L. Courbin, F. Courtois, H. M. Cropper, M. Da Silva, A. Degaudenzi, H. De Lucia, G. Di Giorgio, A. M. Dinis, J. Dubath, F. Duncan, C. A. J. Dupac, X. Dusini, S. Farina, M. Farrens, S. Faustini, F. Ferriol, S. Fourmanoit, N. Frailis, M. Franceschi, E. Fumana, M. Galeotta, S. Gillard, W. Gillis, B. Giocoli, C. Granett, B. R. Grazian, A. Grupp, F. Guzzo, L. Haugan, S. V. H. Hoar, J. Hoekstra, H. Holmes, W. Hook, I. Hormuth, F. Hornstrup, A. Hudelot, P. Jahnke, K. Jhabvala, M. Joachimi, B. Keihänen, E. Kermiche, S. Kiessling, A. Kilbinger, M. Kohley, R. Kubik, B. Kümmel, M. Kunz, M. Kurki-Suonio, H. Lahav, O. Laureijs, R. Mignant, D. Le Ligori, S. Lilje, P. B. Lindholm, V. Lloro, I. Mainetti, G. Maiorano, E. Mansutti, O. Marggraf, O. Markovic, K. Martinelli, M. Martinet, N. Marulli, F. Massey, R. Medinaceli, E. Mei, S. Melchior, M. Mellier, Y. Merlin, E. Meylan, G. Moresco, M. Moscardini, L. Nakajima, R. Nichol, R. C. Niemi, S. -M. Nightingale, J. W. Padilla, C. Paltani, S. Pasian, F. Pedersen, K. Percival, W. J. Pettorino, V. Pires, S. Polenta, G. Poncet, M. Popa, L. A. Pozzetti, L. Raison, F. Rebolo, R. Renzi, A. Rhodes, J. Riccio, G. Rix, H. -W. Romelli, E. Roncarelli, M. Rossetti, E. Rusholme, B. Saglia, R. Sakr, Z. Sánchez, A. G. Sapone, D. Sartoris, B. Schneider, P. Schrabback, T. Secroun, A. Seidel, G. Serrano, S. Sirignano, C. Sirri, G. Stanco, L. Steinwagner, J. Tallada-Crespí, P. Tereno, I. Toledo-Moreo, R. Torradeflot, F. Tutusaus, I. Valenziano, L. Vassallo, T. Kleijn, G. Verdoes Veropalumbo, A. Wang, Y. Weller, J. Zacchei, A. Zamorani, G. Zucca, E. Burigana, C. Casenove, P. Mora, A. Scottez, V. Viel, M. Jauzac, M. Dannerbauer, H.
author_facet	O'Riordan, C. M. Oldham, L. J. Nersesian, A. Li, T. Collett, T. E. Sluse, D. Altieri, B. Clément, B. C., K. Vasan G. Rhoades, S. Chen, Y. Jones, T. Adami, C. Gavazzi, R. Vegetti, S. Powell, D. M. Barroso, J. A. Acevedo Andika, I. T. Bhatawdekar, R. Cooray, A. R. Despali, G. Diego, J. M. Ecker, L. R. Galan, A. Gómez-Alvarez, P. Leuzzi, L. Meneghetti, M. Metcalf, R. B. Schirmer, M. Serjeant, S. Tortora, C. Vaccari, M. Vernardos, G. Walmsley, M. Amara, A. Andreon, S. Auricchio, N. Aussel, H. Baccigalupi, C. Baldi, M. Balestra, A. Bardelli, S. Basset, A. Battaglia, P. Bender, R. Bonino, D. Branchini, E. Brescia, M. Brinchmann, J. Caillat, A. Camera, S. Capobianco, V. Carbone, C. Carretero, J. Casas, S. Castander, F. J. Castellano, M. Castignani, G. Cavuoti, S. Cimatti, A. Colodro-Conde, C. Congedo, G. Conselice, C. J. Conversi, L. Copin, Y. Corcione, L. Courbin, F. Courtois, H. M. Cropper, M. Da Silva, A. Degaudenzi, H. De Lucia, G. Di Giorgio, A. M. Dinis, J. Dubath, F. Duncan, C. A. J. Dupac, X. Dusini, S. Farina, M. Farrens, S. Faustini, F. Ferriol, S. Fourmanoit, N. Frailis, M. Franceschi, E. Fumana, M. Galeotta, S. Gillard, W. Gillis, B. Giocoli, C. Granett, B. R. Grazian, A. Grupp, F. Guzzo, L. Haugan, S. V. H. Hoar, J. Hoekstra, H. Holmes, W. Hook, I. Hormuth, F. Hornstrup, A. Hudelot, P. Jahnke, K. Jhabvala, M. Joachimi, B. Keihänen, E. Kermiche, S. Kiessling, A. Kilbinger, M. Kohley, R. Kubik, B. Kümmel, M. Kunz, M. Kurki-Suonio, H. Lahav, O. Laureijs, R. Mignant, D. Le Ligori, S. Lilje, P. B. Lindholm, V. Lloro, I. Mainetti, G. Maiorano, E. Mansutti, O. Marggraf, O. Markovic, K. Martinelli, M. Martinet, N. Marulli, F. Massey, R. Medinaceli, E. Mei, S. Melchior, M. Mellier, Y. Merlin, E. Meylan, G. Moresco, M. Moscardini, L. Nakajima, R. Nichol, R. C. Niemi, S. -M. Nightingale, J. W. Padilla, C. Paltani, S. Pasian, F. Pedersen, K. Percival, W. J. Pettorino, V. Pires, S. Polenta, G. Poncet, M. Popa, L. A. Pozzetti, L. Raison, F. Rebolo, R. Renzi, A. Rhodes, J. Riccio, G. Rix, H. -W. Romelli, E. Roncarelli, M. Rossetti, E. Rusholme, B. Saglia, R. Sakr, Z. Sánchez, A. G. Sapone, D. Sartoris, B. Schneider, P. Schrabback, T. Secroun, A. Seidel, G. Serrano, S. Sirignano, C. Sirri, G. Stanco, L. Steinwagner, J. Tallada-Crespí, P. Tereno, I. Toledo-Moreo, R. Torradeflot, F. Tutusaus, I. Valenziano, L. Vassallo, T. Kleijn, G. Verdoes Veropalumbo, A. Wang, Y. Weller, J. Zacchei, A. Zamorani, G. Zucca, E. Burigana, C. Casenove, P. Mora, A. Scottez, V. Viel, M. Jauzac, M. Dannerbauer, H.
contents	We report the discovery of a complete Einstein ring around the elliptical galaxy NGC 6505, at $z=0.042$. This is the first strong gravitational lens discovered in Euclid and the first in an NGC object from any survey. The combination of the low redshift of the lens galaxy, the brightness of the source galaxy ($I_\mathrm{E}=18.1$ lensed, $I_\mathrm{E}=21.3$ unlensed), and the completeness of the ring make this an exceptionally rare strong lens, unidentified until its observation by Euclid. We present deep imaging data of the lens from the Euclid Visible Camera (VIS) and Near-Infrared Spectrometer and Photometer (NISP) instruments, as well as resolved spectroscopy from the Keck Cosmic Web Imager (KCWI). The Euclid imaging in particular presents one of the highest signal-to-noise ratio optical/near-infrared observations of a strong gravitational lens to date. From the KCWI data we measure a source redshift of $z=0.406$. Using data from the Dark Energy Spectroscopic Instrument (DESI) we measure a velocity dispersion for the lens galaxy of $σ_\star=303\pm15\,\mathrm{kms}^{-1}$. We model the lens galaxy light in detail, revealing angular structure that varies inside the Einstein ring. After subtracting this light model from the VIS observation, we model the strongly lensed images, finding an Einstein radius of 2.5 arcsec, corresponding to $2.1\,\mathrm{kpc}$ at the redshift of the lens. This is small compared to the effective radius of the galaxy, $R_\mathrm{eff}\sim 12.3\,\mathrm{arcsec}$. Combining the strong lensing measurements with analysis of the spectroscopic data we estimate a dark matter fraction inside the Einstein radius of $f_\mathrm{DM} = (11.1_{-3.5}^{+5.4})\%$ and a stellar initial mass-function (IMF) mismatch parameter of $α_\mathrm{IMF} = 1.26_{-0.08}^{+0.05}$, indicating a heavier-than-Chabrier IMF in the centre of the galaxy.
format	Preprint
id	arxiv_https___arxiv_org_abs_2502_06505
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Euclid: A complete Einstein ring in NGC 6505 O'Riordan, C. M. Oldham, L. J. Nersesian, A. Li, T. Collett, T. E. Sluse, D. Altieri, B. Clément, B. C., K. Vasan G. Rhoades, S. Chen, Y. Jones, T. Adami, C. Gavazzi, R. Vegetti, S. Powell, D. M. Barroso, J. A. Acevedo Andika, I. T. Bhatawdekar, R. Cooray, A. R. Despali, G. Diego, J. M. Ecker, L. R. Galan, A. Gómez-Alvarez, P. Leuzzi, L. Meneghetti, M. Metcalf, R. B. Schirmer, M. Serjeant, S. Tortora, C. Vaccari, M. Vernardos, G. Walmsley, M. Amara, A. Andreon, S. Auricchio, N. Aussel, H. Baccigalupi, C. Baldi, M. Balestra, A. Bardelli, S. Basset, A. Battaglia, P. Bender, R. Bonino, D. Branchini, E. Brescia, M. Brinchmann, J. Caillat, A. Camera, S. Capobianco, V. Carbone, C. Carretero, J. Casas, S. Castander, F. J. Castellano, M. Castignani, G. Cavuoti, S. Cimatti, A. Colodro-Conde, C. Congedo, G. Conselice, C. J. Conversi, L. Copin, Y. Corcione, L. Courbin, F. Courtois, H. M. Cropper, M. Da Silva, A. Degaudenzi, H. De Lucia, G. Di Giorgio, A. M. Dinis, J. Dubath, F. Duncan, C. A. J. Dupac, X. Dusini, S. Farina, M. Farrens, S. Faustini, F. Ferriol, S. Fourmanoit, N. Frailis, M. Franceschi, E. Fumana, M. Galeotta, S. Gillard, W. Gillis, B. Giocoli, C. Granett, B. R. Grazian, A. Grupp, F. Guzzo, L. Haugan, S. V. H. Hoar, J. Hoekstra, H. Holmes, W. Hook, I. Hormuth, F. Hornstrup, A. Hudelot, P. Jahnke, K. Jhabvala, M. Joachimi, B. Keihänen, E. Kermiche, S. Kiessling, A. Kilbinger, M. Kohley, R. Kubik, B. Kümmel, M. Kunz, M. Kurki-Suonio, H. Lahav, O. Laureijs, R. Mignant, D. Le Ligori, S. Lilje, P. B. Lindholm, V. Lloro, I. Mainetti, G. Maiorano, E. Mansutti, O. Marggraf, O. Markovic, K. Martinelli, M. Martinet, N. Marulli, F. Massey, R. Medinaceli, E. Mei, S. Melchior, M. Mellier, Y. Merlin, E. Meylan, G. Moresco, M. Moscardini, L. Nakajima, R. Nichol, R. C. Niemi, S. -M. Nightingale, J. W. Padilla, C. Paltani, S. Pasian, F. Pedersen, K. Percival, W. J. Pettorino, V. Pires, S. Polenta, G. Poncet, M. Popa, L. A. Pozzetti, L. Raison, F. Rebolo, R. Renzi, A. Rhodes, J. Riccio, G. Rix, H. -W. Romelli, E. Roncarelli, M. Rossetti, E. Rusholme, B. Saglia, R. Sakr, Z. Sánchez, A. G. Sapone, D. Sartoris, B. Schneider, P. Schrabback, T. Secroun, A. Seidel, G. Serrano, S. Sirignano, C. Sirri, G. Stanco, L. Steinwagner, J. Tallada-Crespí, P. Tereno, I. Toledo-Moreo, R. Torradeflot, F. Tutusaus, I. Valenziano, L. Vassallo, T. Kleijn, G. Verdoes Veropalumbo, A. Wang, Y. Weller, J. Zacchei, A. Zamorani, G. Zucca, E. Burigana, C. Casenove, P. Mora, A. Scottez, V. Viel, M. Jauzac, M. Dannerbauer, H. Astrophysics of Galaxies We report the discovery of a complete Einstein ring around the elliptical galaxy NGC 6505, at $z=0.042$. This is the first strong gravitational lens discovered in Euclid and the first in an NGC object from any survey. The combination of the low redshift of the lens galaxy, the brightness of the source galaxy ($I_\mathrm{E}=18.1$ lensed, $I_\mathrm{E}=21.3$ unlensed), and the completeness of the ring make this an exceptionally rare strong lens, unidentified until its observation by Euclid. We present deep imaging data of the lens from the Euclid Visible Camera (VIS) and Near-Infrared Spectrometer and Photometer (NISP) instruments, as well as resolved spectroscopy from the Keck Cosmic Web Imager (KCWI). The Euclid imaging in particular presents one of the highest signal-to-noise ratio optical/near-infrared observations of a strong gravitational lens to date. From the KCWI data we measure a source redshift of $z=0.406$. Using data from the Dark Energy Spectroscopic Instrument (DESI) we measure a velocity dispersion for the lens galaxy of $σ_\star=303\pm15\,\mathrm{kms}^{-1}$. We model the lens galaxy light in detail, revealing angular structure that varies inside the Einstein ring. After subtracting this light model from the VIS observation, we model the strongly lensed images, finding an Einstein radius of 2.5 arcsec, corresponding to $2.1\,\mathrm{kpc}$ at the redshift of the lens. This is small compared to the effective radius of the galaxy, $R_\mathrm{eff}\sim 12.3\,\mathrm{arcsec}$. Combining the strong lensing measurements with analysis of the spectroscopic data we estimate a dark matter fraction inside the Einstein radius of $f_\mathrm{DM} = (11.1_{-3.5}^{+5.4})\%$ and a stellar initial mass-function (IMF) mismatch parameter of $α_\mathrm{IMF} = 1.26_{-0.08}^{+0.05}$, indicating a heavier-than-Chabrier IMF in the centre of the galaxy.
title	Euclid: A complete Einstein ring in NGC 6505
topic	Astrophysics of Galaxies
url	https://arxiv.org/abs/2502.06505