Zobrazeno 1 - 10
of 2 232
pro vyhledávání: '"A. Escala"'
The coexistence of nuclear star clusters (NSCs) and supermassive black holes (SMBHs) in galaxies with stellar masses $\sim 10^{10}~$M$_\odot$, the scaling relations between their properties and properties of the host galaxy (e.g., $M_{NSC}^{stellar}-
Externí odkaz:
http://arxiv.org/abs/2412.08280
This study investigates the influence of intermediate-mass black holes (IMBHs) on galactic morphology, focusing on their evolution within dwarf galaxies at high redshift (z~2). Using high-resolution zoom-in cosmological simulations, we explore how IM
Externí odkaz:
http://arxiv.org/abs/2412.06495
Autor:
Crosby, Ethan, Mateo, Mario, Escala, Ivanna, Jerjen, Helmut, Müller, Oliver, Pawlowski, Marcel S.
We report the spectroscopic analysis of ten satellite galaxy candidates in the sphere of influence of the Sombrero galaxy (M104, NGC4594), based on data obtained with IFUM (Integral Field Units for Magellan). Based on their newly-observed recessional
Externí odkaz:
http://arxiv.org/abs/2412.02060
Autor:
Simon, Joshua D., Li, Ting S., Ji, Alexander P., Pace, Andrew B., Hansen, Terese T., Cerny, William, Escala, Ivanna, Koposov, Sergey E., Drlica-Wagner, Alex, Mau, Sidney, Kirby, Evan N.
We present spectroscopy of the ultra-faint Milky Way satellites Eridanus III (Eri III) and DELVE 1. We identify eight member stars in each satellite and place non-constraining upper limits on their velocity and metallicity dispersions. The brightest
Externí odkaz:
http://arxiv.org/abs/2410.08276
Autor:
Cullinane, L. R., Gilbert, Karoline M., Escala, Ivanna, Wojno, J. Leigh, Kirby, Evan N., Kvasova, Kateryna A., Tollerud, Erik, Collins, Michelle L. M., Rich, R. Michael
With a luminosity similar to that of Milky Way dwarf spheroidal (dSph) systems like Sextans, but a spatial extent similar to that of ultradiffuse galaxies (UDGs), Andromeda (And) XIX is an unusual satellite of M31. To investigate the origin of this g
Externí odkaz:
http://arxiv.org/abs/2407.04349
Autor:
Vergara, M. C., Schleicher, D. R. G., Escala, A., Reinoso, B., Dotti, F. Flammini, Kamlah, A. W. H., Liempi, M., Hoyer, N., Neumayer, N., Spurzem, R.
Publikováno v:
A&A 689, A34 (2024)
This paper explores the theoretical relation between star clusters and black holes within, focusing on the potential role of nuclear star clusters (NSCs), globular clusters (GCs), and ultra compact dwarf galaxies (UCDs) as environments that allow for
Externí odkaz:
http://arxiv.org/abs/2405.12008
Autor:
Ogami, Itsuki, Tanaka, Mikito, Komiyama, Yutaka, Chiba, Masashi, Guhathakurta, Puragra, Kirby, Evan N., Wyse, Rosemary F. G., Filion, Carrie, Gilbert, Karoline M., Escala, Ivanna, Mori, Masao, Kirihara, Takanobu, Tanaka, Masayuki, Ishigaki, Miho N., Hayashi, Kohei, Lee, Myun Gyoon, Sharma, Sanjib, Kalirai, Jason S., Lupton, Robert H.
We analyse the M31 halo and its substructure within a projected radius of 120 kpc using a combination of Subaru/HSC NB515 and CFHT/MegaCam g- & i-bands. We succeed in separating M31's halo stars from foreground contamination with $\sim$ 90 \% accurac
Externí odkaz:
http://arxiv.org/abs/2401.00668
Autor:
Cullinane, L. R., Gilbert, Karoline M., Guhathakurta, Puragra, Quirk, A. C. N., Escala, Ivanna, Smercina, Adam, Williams, Benjamin F., Tollerud, Erik, Qu, Jessamine, McConnell, Kaela
The dwarf galaxy Triangulum (M33) presents an interesting testbed for studying stellar halo formation: it is sufficiently massive so as to have likely accreted smaller satellites, but also lies within the regime where feedback and other "in-situ" for
Externí odkaz:
http://arxiv.org/abs/2310.05023
Autor:
Cunningham, Emily C., Hunt, Jason A. S., Price-Whelan, Adrian M., Johnston, Kathryn V., Ness, Melissa K., Lu, Yuxi, Escala, Ivanna, Stelea, Ioana A.
The stellar stream connected to the Sagittarius (Sgr) dwarf galaxy is the most massive tidal stream that has been mapped in the Galaxy, and is the dominant contributor to the outer stellar halo of the Milky Way. We present metallicity maps of the Sgr
Externí odkaz:
http://arxiv.org/abs/2307.08730
Autor:
Dey, Arjun, Najita, Joan, Filion, Carrie, Han, Jiwon Jesse, Pearson, Sarah, Wyse, Rosemary, Thob, Adrien C. R., Anguiano, Borja, Apfel, Miranda, Arnaboldi, Magda, Bell, Eric F., Silva, Leandro Beraldo e, Besla, Gurtina, Bhattacharya, Aparajito, Bhattacharya, Souradeep, Chandra, Vedant, Choi, Yumi, Collins, Michelle L. M., Cunningham, Emily C., Dalcanton, Julianne J., Escala, Ivanna, Foote, Hayden R., Ferguson, Annette M. N., Gibson, Benjamin J., Gnedin, Oleg Y., Guhathakurta, Puragra, Hawkins, Keith, Horta, Danny, Ibata, Rodrigo, Kallivayalil, Nitya, Koch, Eric W., Koposov, Sergey, Lewis, Geraint F., Macri, Lucas, McKinnon, Kevin A., Nidever, David L., Olsen, Knut A. G., Patel, Ekta, Petersen, Michael S., Petric, Andreea, Price-Whelan, Adrian M., Rich, R. Michael, Riley, Alexander H., Saha, Abhijit, Sanderson, Robyn E., Sharma, Sanjib, Sohn, Sangmo Tony, Soraisam, Monika D., Steinmetz, Matthias, Valluri, Monica, Vivas, A. Katherina, Williams, Benjamin F., Wojno, J. Leigh
As our nearest large neighbor, the Andromeda Galaxy provides a unique laboratory for investigating galaxy formation and the distribution and substructure properties of dark matter in a Milky Way-like galaxy. Here, we propose an initial 2-epoch ($\Del
Externí odkaz:
http://arxiv.org/abs/2306.12302