A new faint milky way satellite discovered in the Pan-STARRS1 3π Survey

Benjamin P.M. Laevens; Nicolas F. Martin; Rodrigo A. Ibata; Hans Walter Rix; Edouard J. Bernard; Eric F. Bell; Branimir Sesar; Annette M.N. Ferguson; Edward F. Schlafly; Colin T. Slater; William S. Burgett; Kenneth C. Chambers; Heather Flewelling; Klaus A. Hodapp; Nicholas Kaiser; Rolf Peter Kudritzki; Robert H. Lupton; Eugene A. Magnier; Nigel Metcalfe; Jeffrey S. Morgan; Paul A. Price; John L. Tonry; Richard J. Wainscoat; Christopher Waters

doi:10.1088/2041-8205/802/2/L18

A new faint milky way satellite discovered in the Pan-STARRS1 3π Survey

Benjamin P.M. Laevens
, Nicolas F. Martin
, Rodrigo A. Ibata
, Hans Walter Rix
, Edouard J. Bernard
, Eric F. Bell
, Branimir Sesar
, Annette M.N. Ferguson
, Edward F. Schlafly
, Colin T. Slater
, William S. Burgett
, Kenneth C. Chambers
, Heather Flewelling
, Klaus A. Hodapp
, Nicholas Kaiser
, Rolf Peter Kudritzki
, Robert H. Lupton
, Eugene A. Magnier
, Nigel Metcalfe
, Jeffrey S. Morgan

Paul A. Price, John L. Tonry, Richard J. Wainscoat, Christopher Waters

Astrophysical Sciences

Research output: Contribution to journal › Article › peer-review

152 Scopus citations

Abstract

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 M_V = -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.

Original language	English (US)
Article number	L18
Journal	Astrophysical Journal Letters
Volume	802
Issue number	2
DOIs	https://doi.org/10.1088/2041-8205/802/2/L18
State	Published - Apr 1 2015

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Galaxies: dwarf
Galaxy: structure
Globular clusters: general
Local group

Access to Document

10.1088/2041-8205/802/2/L18

Cite this

Laevens, B. P. M., Martin, N. F., Ibata, R. A., Rix, H. W., Bernard, E. J., Bell, E. F., Sesar, B., Ferguson, A. M. N., Schlafly, E. F., Slater, C. T., Burgett, W. S., Chambers, K. C., Flewelling, H., Hodapp, K. A., Kaiser, N., Kudritzki, R. P., Lupton, R. H., Magnier, E. A., Metcalfe, N., ... Waters, C. (2015). A new faint milky way satellite discovered in the Pan-STARRS1 3π Survey. Astrophysical Journal Letters, 802(2), Article L18. https://doi.org/10.1088/2041-8205/802/2/L18

@article{f672d77ddc1841b2a1cc76c6dc37908b,

title = "A new faint milky way satellite discovered in the Pan-STARRS1 3π Survey",

abstract = "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 Bo{\"o}tes 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.",

keywords = "Galaxies: dwarf, Galaxy: structure, Globular clusters: general, Local group",

author = "Laevens, \{Benjamin P.M.\} and Martin, \{Nicolas F.\} and Ibata, \{Rodrigo A.\} and Rix, \{Hans Walter\} and Bernard, \{Edouard J.\} and Bell, \{Eric F.\} and Branimir Sesar and Ferguson, \{Annette M.N.\} and Schlafly, \{Edward F.\} and Slater, \{Colin T.\} and Burgett, \{William S.\} and Chambers, \{Kenneth C.\} and Heather Flewelling and Hodapp, \{Klaus A.\} and Nicholas Kaiser and Kudritzki, \{Rolf Peter\} and Lupton, \{Robert H.\} and Magnier, \{Eugene A.\} and Nigel Metcalfe and Morgan, \{Jeffrey S.\} and Price, \{Paul A.\} and Tonry, \{John L.\} and Wainscoat, \{Richard J.\} and Christopher Waters",

year = "2015",

month = apr,

day = "1",

doi = "10.1088/2041-8205/802/2/L18",

language = "English (US)",

volume = "802",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "American Astronomical Society",

number = "2",

}

Laevens, BPM, Martin, NF, Ibata, RA, Rix, HW, Bernard, EJ, Bell, EF, Sesar, B, Ferguson, AMN, Schlafly, EF, Slater, CT, Burgett, WS, Chambers, KC, Flewelling, H, Hodapp, KA, Kaiser, N, Kudritzki, RP, Lupton, RH, Magnier, EA, Metcalfe, N, Morgan, JS, Price, PA, Tonry, JL, Wainscoat, RJ & Waters, C 2015, 'A new faint milky way satellite discovered in the Pan-STARRS1 3π Survey', Astrophysical Journal Letters, vol. 802, no. 2, L18. https://doi.org/10.1088/2041-8205/802/2/L18

TY - JOUR

T1 - A new faint milky way satellite discovered in the Pan-STARRS1 3π Survey

AU - Laevens, Benjamin P.M.

AU - Martin, Nicolas F.

AU - Ibata, Rodrigo A.

AU - Rix, Hans Walter

AU - Bernard, Edouard J.

AU - Bell, Eric F.

AU - Sesar, Branimir

AU - Ferguson, Annette M.N.

AU - Schlafly, Edward F.

AU - Slater, Colin T.

AU - Burgett, William S.

AU - Chambers, Kenneth C.

AU - Flewelling, Heather

AU - Hodapp, Klaus A.

AU - Kaiser, Nicholas

AU - Kudritzki, Rolf Peter

AU - Lupton, Robert H.

AU - Magnier, Eugene A.

AU - Metcalfe, Nigel

AU - Morgan, Jeffrey S.

AU - Price, Paul A.

AU - Tonry, John L.

AU - Wainscoat, Richard J.

AU - Waters, Christopher

PY - 2015/4/1

Y1 - 2015/4/1

N2 - 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.

AB - 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.

KW - Galaxies: dwarf

KW - Galaxy: structure

KW - Globular clusters: general

KW - Local group

UR - https://www.scopus.com/pages/publications/84926466058

UR - https://www.scopus.com/pages/publications/84926466058#tab=citedBy

U2 - 10.1088/2041-8205/802/2/L18

DO - 10.1088/2041-8205/802/2/L18

M3 - Article

AN - SCOPUS:84926466058

SN - 2041-8205

VL - 802

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 2

M1 - L18

ER -

A new faint milky way satellite discovered in the Pan-STARRS1 3π Survey

Abstract

All Science Journal Classification (ASJC) codes

Keywords

Access to Document

Other files and links

Fingerprint

Cite this