Zobrazeno 1 - 10
of 198
pro vyhledávání: '"Collins, Michelle L"'
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:
Fu, Sal Wanying, Weisz, Daniel R., Starkenburg, Else, Martin, Nicolas, Collins, Michelle L. M., Savino, Alessandro, Boylan-Kolchin, Michael, Côté, Patrick, Dolphin, Andrew E., Longeard, Nicolas, Mateo, Mario L., Mercado, Francisco J., Sandford, Nathan R., Skillman, Evan D.
We present $\sim300$ stellar metallicity measurements in two faint M31 dwarf galaxies, Andromeda XVI ($M_V = -7.5$) and Andromeda XXVIII ($M_V = -8.8$) derived using metallicity-sensitive Calcium H & K narrow-band Hubble Space Telescope imaging. Thes
Externí odkaz:
http://arxiv.org/abs/2407.04698
Discovery of Globular Cluster Candidates in the Dwarf Irregular Galaxy IC 2574 Using HST/ACS Imaging
We report the discovery of 23 globular cluster (GC) candidates around the relatively isolated dwarf galaxy IC 2574 within the Messier 81 (M81) group, at a distance of 3.86 Mpc. We use observations from the HST Advanced Camera for Surveys (ACS) to ana
Externí odkaz:
http://arxiv.org/abs/2402.16955
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
Autor:
Collins, Michelle L. M., Karim, Noushin, Martinez-Delgado, David, Monelli, Matteo, Tollerud, Erik J., Donatiello, Giuseppe, Navabi, Mahdieh, Charles, Emily, Boschin, Walter
Pisces VII/Triangulum III (Pisc~VII) was discovered in the DESI Legacy Imaging Survey and was shown to be a Local Group dwarf galaxy with follow-up imaging from the 4-m Telescopio Nazionale Galileo. However, this imaging was unable to reach the horiz
Externí odkaz:
http://arxiv.org/abs/2305.13966
Autor:
Collins, Michelle L. M., Tollerud, Erik J., Sand, David J., Bonaca, Ana, Willman, Beth, Strader, Jay
We present a chemodynamical analysis of the Leo V dwarf galaxy, based on the Keck II DEIMOS spectra of eight member stars. We find a systemic velocity for the system of nu(r) = 170.9(+2.1) (-1.9) km s(-1) and barely resolve a velocity dispersion for
Externí odkaz:
http://hdl.handle.net/10150/623924
http://arizona.openrepository.com/arizona/handle/10150/623924
http://arizona.openrepository.com/arizona/handle/10150/623924
Autor:
Charles, Emily J. E., Collins, Michelle L. M., Rich, R. Michael, Read, Justin I., Kim, Stacy Y., Ibata, Rodrigo A., Martin, Nicolas F., Chapman, Scott C., Balbinot, Eduardo, Weisz, Daniel R.
Andromeda (And) XXV has previously been reported as a dwarf spheroidal galaxy (dSph) with little-to-no dark matter. However, the uncertainties on this result were significant. In this study, we double the number of member stars and re-derive the kine
Externí odkaz:
http://arxiv.org/abs/2209.15022
Autor:
Collins, Michelle L. M., Williams, Benjamin F., Tollerud, Erik J., Balbinot, Eduardo, Gilbert, Karoline M., Dolphin, Andrew
We present deep imaging of the ultra-diffuse Andromeda XIX dwarf galaxy from the Advance Camera for Surveys on the Hubble Space Telescope which resolves its stellar populations to below the oldest main sequence turn-off. We derive a full star formati
Externí odkaz:
http://arxiv.org/abs/2209.12912
Autor:
Savino, Alessandro, Weisz, Daniel R., Skillman, Evan D., Dolphin, Andrew, Kallivayalil, Nitya, Wetzel, Andrew, Anderson, Jay, Besla, Gurtina, Boylan-Kolchin, Michael, Bullock, James S., Cole, Andrew A., Collins, Michelle L. M., Cooper, M. C., Deason, Alis J., Dotter, Aaron L., Fardal, Mark, Ferguson, Annette M. N., Fritz, Tobias K., Geha, Marla C., Gilbert, Karoline M., Guhathakurta, Puragra, Ibata, Rodrigo, Irwin, Michael J., Jeon, Myoungwon, Kirby, Evan, Lewis, Geraint F., Mackey, Dougal, Majewski, Steven R., Martin, Nicolas, McConnachie, Alan, Patel, Ekta, Rich, R. Michael, Simon, Joshua D., Sohn, Sangmo Tony, Tollerud, Erik J., van der Marel, Roeland P.
We measure homogeneous distances to M31 and 38 associated stellar systems ($-$16.8$\le M_V \le$ $-$6.0), using time-series observations of RR Lyrae stars taken as part of the Hubble Space Telescope Treasury Survey of M31 Satellites. From $>700$ orbit
Externí odkaz:
http://arxiv.org/abs/2206.02801
Feedback to the interstellar medium (ISM) from ionising radiation, stellar winds and supernovae is central to regulating star formation in galaxies. Due to their low mass ($M_{*} < 10^{9}$\,M$_\odot$), dwarf galaxies are particularly susceptible to s
Externí odkaz:
http://arxiv.org/abs/2205.06825