The Astrophysical Journal (Jan 2024)
CSS 161010: A Luminous Fast Blue Optical Transient with Broad Blueshifted Hydrogen Lines
- Claudia P. Gutiérrez,
- Seppo Mattila,
- Peter Lundqvist,
- Luc Dessart,
- Santiago González-Gaitán,
- Peter G. Jonker,
- Subo Dong,
- Deanne Coppejans,
- Ping Chen,
- Panos Charalampopoulos,
- Nancy Elias-Rosa,
- Thomas M. Reynolds,
- Christopher Kochanek,
- Morgan Fraser,
- Andrea Pastorello,
- Mariusz Gromadzki,
- Jack Neustadt,
- Stefano Benetti,
- Erkki Kankare,
- Tuomas Kangas,
- Rubina Kotak,
- Maximilian D. Stritzinger,
- Thomas Wevers,
- Bing Zhang,
- David Bersier,
- Subhash Bose,
- David A. H. Buckley,
- Raya Dastidar,
- Anjasha Gangopadhyay,
- Aleksandra Hamanowicz,
- Juna A. Kollmeier,
- Jirong Mao,
- Kuntal Misra,
- Stephen. B. Potter,
- Jose L. Prieto,
- Encarni Romero-Colmenero,
- Mridweeka Singh,
- Auni Somero,
- Giacomo Terreran,
- Petri Vaisanen,
- Łukasz Wyrzykowski
Affiliations
- Claudia P. Gutiérrez
- ORCiD
- Institut d’Estudis Espacials de Catalunya (IEEC) , Edifici RDIT, Campus UPC, 08860 Castelldefels (Barcelona), Spain ; [email protected]; Institute of Space Sciences (ICE, CSIC) , Campus UAB, Carrer de Can Magrans, s/n, E-08193 Barcelona, Spain; Finnish Centre for Astronomy with ESO (FINCA), FI-20014, University of Turku , Finland; Department of Physics and Astronomy, FI-20014, University of Turku , Finland
- Seppo Mattila
- ORCiD
- Department of Physics and Astronomy, FI-20014, University of Turku , Finland; School of Sciences, European University Cyprus , Diogenes Street, Engomi, 1516 Nicosia, Cyprus
- Peter Lundqvist
- ORCiD
- The Oskar Klein Centre, Department of Astronomy, Stockholm University , AlbaNova, SE-10691, Stockholm, Sweden
- Luc Dessart
- ORCiD
- Institut d’Astrophysique de Paris, CNRS-Sorbonne Université , 98 bis boulevard Arago, F-75014 Paris, France
- Santiago González-Gaitán
- ORCiD
- CENTRA, Instituto Superior Técnico, Universidade de Lisboa , Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
- Peter G. Jonker
- ORCiD
- Department of Astrophysics/IMAPP, Radboud University , P.O. Box 9010, 6500 GL Nijmegen, The Netherlands; SRON, Netherlands Institute for Space Research , Niels Bohrweg 4, 2333 CA, Leiden, The Netherlands
- Subo Dong
- ORCiD
- Department of Astronomy, School of Physics, Peking University , 5 Yiheyuan Road, Haidian District, Beijing 100871, People's Republic of China; Kavli Institute of Astronomy and Astrophysics, Peking University , 5 Yiheyuan Road, Haidian District, Beijing 100871, People's Republic of China; National Astronomical Observatories, Chinese Academy of Science , 20A Datun Road, Chaoyang District, Beijing 100101, People's Republic of China
- Deanne Coppejans
- ORCiD
- Department of Physics, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, UK
- Ping Chen
- Department of Astronomy, School of Physics, Peking University , 5 Yiheyuan Road, Haidian District, Beijing 100871, People's Republic of China; Department of Particle Physics and Astrophysics, Weizmann Institute of Science , 234 Herzl St, 76100 Rehovot, Israel
- Panos Charalampopoulos
- ORCiD
- Department of Physics and Astronomy, FI-20014, University of Turku , Finland
- Nancy Elias-Rosa
- ORCiD
- Institute of Space Sciences (ICE, CSIC) , Campus UAB, Carrer de Can Magrans, s/n, E-08193 Barcelona, Spain; INAF—Osservatorio Astronomico di Padova , Vicolo dell’Osservatorio 5, Padova I-35122, Italy
- Thomas M. Reynolds
- ORCiD
- Department of Physics and Astronomy, FI-20014, University of Turku , Finland; Cosmic Dawn Center (DAWN); Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200, Copenhagen N, Denmark
- Christopher Kochanek
- ORCiD
- Department of Astronomy, The Ohio State University , 140 West 18th Avenue, Columbus, OH 43210, USA; Center for Cosmology and AstroParticle Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USA
- Morgan Fraser
- ORCiD
- UCD School of Physics , L.M.I. Main Building, Beech Hill Road, Dublin 4, D04 P7W1, Ireland
- Andrea Pastorello
- ORCiD
- INAF—Osservatorio Astronomico di Padova , Vicolo dell’Osservatorio 5, Padova I-35122, Italy
- Mariusz Gromadzki
- ORCiD
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Jack Neustadt
- ORCiD
- Department of Astronomy, The Ohio State University , 140 West 18th Avenue, Columbus, OH 43210, USA; Center for Cosmology and AstroParticle Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USA
- Stefano Benetti
- ORCiD
- INAF—Osservatorio Astronomico di Padova , Vicolo dell’Osservatorio 5, Padova I-35122, Italy
- Erkki Kankare
- ORCiD
- Department of Physics and Astronomy, FI-20014, University of Turku , Finland
- Tuomas Kangas
- ORCiD
- Finnish Centre for Astronomy with ESO (FINCA), FI-20014, University of Turku , Finland; Department of Physics and Astronomy, FI-20014, University of Turku , Finland
- Rubina Kotak
- ORCiD
- Department of Physics and Astronomy, FI-20014, University of Turku , Finland
- Maximilian D. Stritzinger
- ORCiD
- Department of Physics and Astronomy, Aarhus University , Ny Munkegade 120, DK-8000 Aarhus C, Denmark
- Thomas Wevers
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA; European Southern Observatory , Alonso de Córdova 3107, Vitacura, Santiago, Chile
- Bing Zhang
- ORCiD
- Nevada Center for Astrophysics, University of Nevada , Las Vegas, 4505 South Maryland Parkway, Las Vegas, NV 89154, USA; Department of Physics and Astronomy, University of Nevada , Las Vegas, 4505 South Maryland Parkway, Las Vegas, NV 89154, USA
- David Bersier
- Astrophysics Research Institute , Liverpool Science Park IC2, Liverpool L3 5RF, UK
- Subhash Bose
- ORCiD
- Department of Physics and Astronomy, Aarhus University , Ny Munkegade 120, DK-8000 Aarhus C, Denmark
- David A. H. Buckley
- ORCiD
- South African Astronomical Observatory , P.O. Box 9, Observatory, 7935 Cape Town, South Africa; Department of Astronomy, University of Cape Town , Private Bag X3, 7701 Rondebosch, South Africa; Department of Physics, University of the Free State , P.O. Box 339, 9300 Bloemfontein, South Africa
- Raya Dastidar
- ORCiD
- Millennium Institute of Astrophysics MAS , Nuncio Monseñor Sotero Sanz 100, Providencia, Santiago, 8320000, Chile; Instituto de Astrofisica, Universidad Andres Bello , Fernandez Concha 700, Las Condes, Santiago, Chile
- Anjasha Gangopadhyay
- ORCiD
- Oskar Klein Centre, Department of Astronomy, Stockholm University , Albanova University Centre, SE-106 91 Stockholm, Sweden
- Aleksandra Hamanowicz
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
- Juna A. Kollmeier
- The Observatories of the Carnegie Institution for Science , 813 Santa Barbara Street, Pasadena, CA 91101, USA; Canadian Institute for Theoretical Astrophysics, University of Toronto , Toronto, ON M5S 98H, Canada
- Jirong Mao
- ORCiD
- Yunnan Observatories, Chinese Academy of Sciences , 650011 Kunming, Yunnan Province, People’s Republic of China
- Kuntal Misra
- ORCiD
- Aryabhatta Research Institute of Observational Sciences , Nainital-263001, India
- Stephen. B. Potter
- ORCiD
- South African Astronomical Observatory , P.O. Box 9, Observatory, 7935 Cape Town, South Africa; Department of Physics, University of Johannesburg , P.O. Box 524, 2006 Auckland Park, South Africa
- Jose L. Prieto
- ORCiD
- Millennium Institute of Astrophysics MAS , Nuncio Monseñor Sotero Sanz 100, Providencia, Santiago, 8320000, Chile; Instituto de Estudios Astrofísicos , Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Av. Ejército Libertador 441, Santiago, Chile
- Encarni Romero-Colmenero
- ORCiD
- South African Astronomical Observatory , P.O. Box 9, Observatory, 7935 Cape Town, South Africa; Southern African Large Telescope (SALT) , P.O. Box 9, Observatory, 7935 Cape Town, South Africa
- Mridweeka Singh
- ORCiD
- Indian Institute of Astrophysics , Koramangala 2nd Block, Bangalore 560034, India
- Auni Somero
- ORCiD
- Department of Physics and Astronomy, FI-20014, University of Turku , Finland
- Giacomo Terreran
- ORCiD
- Las Cumbres Observatory , 6740 Cortona Drive, Suite 102, Goleta, CA 93117-5575, USA; Department of Physics, University of California , Santa Barbara, CA 93106-9530, USA
- Petri Vaisanen
- ORCiD
- Finnish Centre for Astronomy with ESO (FINCA), FI-20014, University of Turku , Finland; South African Astronomical Observatory , P.O. Box 9, Observatory, 7935 Cape Town, South Africa
- Łukasz Wyrzykowski
- ORCiD
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- DOI
- https://doi.org/10.3847/1538-4357/ad89a5
- Journal volume & issue
-
Vol. 977,
no. 2
p. 162
Abstract
We present ultraviolet, optical, and near-infrared photometric and optical spectroscopic observations of the luminous fast blue optical transient (LFBOT) CSS 161010:045834–081803 (CSS 161010). The transient was found in a low-redshift ( z = 0.033) dwarf galaxy. The light curves of CSS 161010 are characterized by an extremely fast evolution and blue colors. The V -band light curve shows that CSS 161010 reaches an absolute peak of ${{M}}_{V}^{\max }=-20.66\pm 0.06$ mag in 3.8 days from the start of the outburst. After maximum, CSS 161010 follows a power-law decline ∝ t ^−2.8±0.1 in all optical bands. These photometric properties are comparable to those of well-observed LFBOTs such as AT 2018cow, AT 2020mrf, and AT 2020xnd. However, unlike these objects, the spectra of CSS 161010 show a remarkable transformation from a blue and featureless continuum to spectra dominated by very broad, entirely blueshifted hydrogen emission lines with velocities of up to 10% of the speed of light. The persistent blueshifted emission and the lack of any emission at the rest wavelength of CSS 161010 are unique features not seen in any transient before CSS 161010. The combined observational properties of CSS 161010 and its M _* ∼ 10 ^8 M _⊙ dwarf galaxy host favor the tidal disruption of a star by an intermediate-mass black hole as its origin.
Keywords
