A NEW FAINT MILKY WAY SATELLITE DISCOVERED IN THE PAN-STARRS1 3π SURVEY

By Benjamin P. M. Laevens, N. Martin, R. Ibata, Hans-Walter Rix, E. Bernard, Eric F. Bell, B. Sesar, A. Ferguson, Edward F. Schlafly, C. Slater and 14 more. 2015

133 citations recorded by the source corpus.

We present the discovery of a faint Milky Way satellite, Laevens 2/Triangulum II, found in the Panoramic Survey Telescope And Rapid Response System 3π imaging data and confirmed with follow-up wide-field photometry from the Large Binocular Cameras. The stellar system, with an absolute magnitude of MV = −1.8 ± 0.5, a heliocentric distance of 30 − 2 + 2 kpc ?> , and a half-mass–radius of 34 − 8 + 9 pc ?> , shows remarkable similarity to faint, nearby, small satellites such as Willman 1, Segue 1, Segue 2, and Boötes II. The discovery of Laevens 2/Triangulum II further populates the region of parameter space for which the boundary between dwarf galaxies and globular clusters becomes tenuous. Follow-up spectroscopy will ultimately determine the nature of this new satellite, whose spatial location hints at a possible connection with the complex Triangulum–Andromeda stellar structures.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/c938077c010f65c477e24a4b7d1897033ccdd8b8

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Instrumentation

Citations in the corpus

SAGITTARIUS II, DRACO II AND LAEVENS 3: THREE NEW MILKY WAY SATELLITES DISCOVERED IN THE PAN-STARRS 1 3π SURVEY (2015, methodology): “Moreover, apparently isolated systems often share a proximity with stellar streams (e.g. Belokurov et al. 2008; Deason et al. 2014; Laevens et al. 2015; Martin et al. 2015).”
A MegaCam Survey of Outer Halo Satellites. III. Photometric and Structural Parameters (2018, background): “The full sample consists of: Balbinot 1 (Balbinot et al. 2013); Laevens 1 and 2 (Laevens et al. 2014, 2015a); Kim 1 (Kim & Jerjen 2015a); Hor II (Kim & Jerjen 2015c); Hyd II (Martin et al. 2015); Gru I (Koposov et al. 2015a); Ind I (Kim et al. 2015b; Bechtol et al. 2015; Koposov et al. 2015a); and…”
EIGHT ULTRA-FAINT GALAXY CANDIDATES DISCOVERED IN YEAR TWO OF THE DARK ENERGY SURVEY (2015, methodology): “…optical imaging surveys and a reanalysis of SDSS data have resulted in the detection of 14 additional Milky Way companions, tentatively classified as dwarf galaxies (Bechtol et al. 2015; Kim & Jerjen 2015b; Kim et al. 2015a; Koposov et al. 2015a; Laevens et al. 2015a, 2015b; Martin et al. 2015).”
Sweating the small stuff: simulating dwarf galaxies, ultra-faint dwarf galaxies, and their own tiny satellites (2015, background): “…the Dark Energy Survey (DES, The DES Collaboration et al. 2015; Koposov et al. 2015), the detection of three more faint dwarf satellite candidates (Laevens et al. 2015; Martin et al. 2015; Kim et al. 2015), and ongoing efforts to discover dwarfs at large distances (Tollerud et al. 2015) provide…”
Dark matter annihilation and decay in dwarf spheroidal galaxies: the classical and ultrafaint dSphs (2015, background): “…2015) and already searched for in Fermi-LAT data (Fermi-LAT Collaboration et al. 2015; Geringer-Sameth et al. 2015) call for a continued effort on c© Xxxx RAS, MNRAS 000, 1–18 this topic (see also Laevens et al. 2015; Martin et al. 2015; Kim et al. 2015 for three other recently discovered dSphs).”
Milky Way Satellite Census. I. The Observational Selection Function for Milky Way Satellites in DES Y3 and Pan-STARRS DR1 (2019, background): “…2015; Drlica-Wagner et al. 2016; Torrealba et al. 2018; Koposov et al. 2018; Mau et al. 2020), ATLAS (Torrealba et al. 2016a,b), PanSTARRS1 (PS1; Laevens et al. 2015a,b), and Gaia (Torrealba et al. 2019b) have further increased the sample of confirmed and candidate satellites to more than 50…”
SEARCHING FOR DARK MATTER ANNIHILATION IN RECENTLY DISCOVERED MILKY WAY SATELLITES WITH FERMI-LAT (2016, methodology): “…optical imaging surveys and a re-analysis of Sloan Digital Sky Survey (SDSS; York et al. 2000) data revealed more than 20 new satellite systems (Bechtol et al. 2015; Koposov et al. 2015a; Laevens et al. 2015a,b; Kim et al. 2015a; Martin et al. 2015a; Kim & Jerjen 2015; Drlica-Wagner et al. 2015b).”
Farthest Neighbor: The Distant Milky Way Satellite Eridanus II (2016, background): “…data from the Dark Energy Survey (DES; Bechtol et al. 2015; Koposov et al. 2015; Drlica-Wagner et al. 2015a; Kim & Jerjen 2015) and other large optical surveys (Martin et al. 2015; Laevens et al. 2015a,b; Kim et al. 2015a,b; Torrealba et al. 2016a,b; Homma et al. 2016; Drlica-Wagner et al. 2016).”